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WIND TURBINE SITE SELECTION IN INDONESIA
GALIH PAMBUDI
A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE
REQUIREMENTS FOR THE DEGREE OF MASTER OF
ENGINEERING (LOGISTICS AND SUPPLY CHAIN SYSTEMS
ENGINEERING)
SIRINDHORN INTERNATIONAL INSTITUTE OF TECHNOLOGY
THAMMASAT UNIVERSITY
ACADEMIC YEAR 2018
A Thesis Presented
Submitted to
Sirindhorn International Institute of Technology
Thammasat University
In partial fulfillment of the requirements for the degree of
MASTER OF ENGINEERING (LOGISTICS AND SUPPLY CHAIN SYSTEMS
Approved as to style and content by
(Asst. Prof. Dr. Narameth Nananukul)
Committee Member and
Chairperson of Examination Committee
(Asst. Prof. Dr. Morrakot Raweewan)
Committee Member
(Assoc. Prof. Dr. Thananya Wasusri)
NOVEMBER 2018
Acknowledgements
The author gratefully acknowledges the financial support provided by the Excellent
Foreign Student Scholarship (EFS) for Graduate Student in Sirindhorn International
Institute of Technology, Thammasat University.
Bachelor of Engineering, Universitas Gadjah Mada, 2016
Master of Engineering, Sirindhorn International Institute of Technology, 2018
Wind farm sites are selected in spacious regions which have more output potential
within constraint resources. Due to its spacious terrain, Indonesia has great potential
for building wind power plants, providing the perfect settings to generate electricity
using wind energy. Keeping in view the reliability and sustainability of wind farm sites,
the selection of the most suitable locations for optimal result is of prime concern to
generate greater amount of energy with less utilization of resources. In this study, the
focus is on proposing a multi-criterion approach to find the most suitable location for
building wind farms. Locations from every region of Indonesia were selected based on
two levels defined by district level to province level. All districts and provinces are
considered as Decision-Making Units (DMUs) which are used to measure the
efficiency scores using Dual Data Envelopment Analysis (DDEA) method. Two levels
are defined to find the best feasible locations within Indonesia from 165 districts and
33 provinces with major focus on geographical and structural technicality of each
DMU. The results show that South Sumatra province has the highest priority potential
for the construction of wind power plants, especially in the district of Palembang. West
Papua, Papua and Maluku provinces have descending priority based on good
infrastructure accessibility and less prone to natural disaster.
Keywords : Dual data envelopment analysis, Wind Power Plant, Site Selection,
Decision Making Unit.
Table of Contents
Chapter Title
Signature Page
List of Tables
List of Figures
1 Introduction
1.1 Background of Propose Study
1.2 Problem Statement
1.3 Objectives of Propose Study
1.4 The Advantages of Propose Study
2 Literature Review
2.1 Literature Review
2.2 Research Gap
3 Research Methodology
3.1 Possible Factors
3.1.1 Level 1 criteria
3.1.2 Level 2 criteria
3.2 Methodology
3.2.1 Dual Data Envelopment Analysis
3.2.2 The Hierarchical Model for two Level DDEA
3.2.3 Fuzzy Primary Data Envelopment Analysis
3.2.4 Principal Component Analysis
4 Results and Discussion
4.1. Data Envelopment Analysis Results
4.2 The Hierarchical Model for two Level DDEA Results
4.3 Fuzzy Primary Data Envelopment Analysis Results
4.4 Principle Component Analysis Results
4.5 Comparison of Three Methods Result
5 Conclusions and Recommendations
5.1 Conclusion
5.2. Recommendations
Appendix A Data Resources
A.1 Districts Level Data
A.2 Provinces Level Data
Appendix B General Optimization Model in IBM ILOG CPLEX
B.1 Model on Districts Level
B.2 Model on Provinces Level
2.1 The summary of case study
2.2 Summarizes the relevant criteria in the wind farm site selection
2.3 Summarizes the relevant methods in the wind farm site selection
3.1 Comparison of the land requirement in different power plant [16]
3.2 Cost analyst for 1 m length of road infrastructure
3.3 Wind class definitions [17]
4.1 Efficiency and ranking of provinces (Level 2)
4.2 Efficiency score of districts (Level 1)
4.3 Detail of hierarchical score for provinces level
4.4 Hierarchical score for five dominant provinces
4.5 Importance degree and context free grammar on HFLTS
4.6 Pairwise evaluations of one expert in main criteria on level 1
4.7 Obtained envelops for HFLTS
4.8 Pessimistic and optimistic preference in district level
4.9 The linguistic interval, interval utilities, midpoint and weights
4.10 Pessimistic and optimistic preference in province level
4.11 The constraint of the priorities for district level
4.12 The constraint of the priorities for province level
4.13 Hierarchical Score for HFLTS
4.14 Principal Component Analysis Results
4.15 Comparison of three methods result.
3.1 Maps of provinces in Indonesia
3.2 Land cost of districts in Indonesia
3.3 Types of road infrastructure
3.4 Types of road infrastructure in Medan North Sumatra
3.5 Distance of the primary and secondary road infrastructures in Medan
3.6 Total cost of infrastructure data
3.7 Data of population in districts
3.8 Ratio of usage area
3.9 Data of electricity consumption in Indonesia’s Provinces
3.10 Data of natural disaster in provinces
3.11 Gravity loading; a. full blade; b. spar-only simplification
3.12 Blade loading cases; a. edgewise bending; b. flap-wise bending
3.13 Data of wind velocity in provinces of Indonesia
3.14 Data of total area in provinces in Indonesia
3.15 Flow Chart of the Proposed Study
3.16 Extraction of Factor analysis in district level
3.17 Scree Plot of district level
3.18 Extraction Box
3.19 Descriptive Box
3.20 Rotation Box
3.21 Options Box
4.1 Hierarchical Score
4.2 Correlation matrix on district level
4.3 KMO and Bartlett’s Test on district level
4.4 Communalities on level 1
4.5 Total variance on district level
4.6 Component matrix on district level
4.7 Pattern matrix on district level
4.8 Structure matrix on level 1
4.9 Scree plot for level 2
4.10 KMO and Bartlett’s Test for Level 2
4.11 Correlation matrix on level 2
4.12 Communalities on level 2
4.13 Total variance on level 2
4.14 Component matrix on level 2
4.15 Pattern matrix on level 2
4.16 Structure matrix on level 2
4.17 Component correlation matrix on level 2
4.18 Top five Provinces in Indonesia
5.1 Full Score of Three Methods
Introduction
The propose study in the first chapter are divided into four sections. Section 1.1
gives background of the proposed study and show the importance of the research study.
Section 1.2 contains details of problem statement of proposed study to define the issue
of the research. Section 1.3 gives the objective of proposed study presents the
framework of this study. Section. Section 1.4 The advantages of the proposed study
provide the benefit of the study to apply in the research area.
1.1 Background
Natural energy resources such as wind energy is renewable, and is freely
available which could lead to the sustainability of energy usage. Selecting the most
suitable sites which have the optimal wind energy resource is a complicated decision-
making process. It is considered as primary concern based on the sustainability and
reliability aspects. The selection of the optimal locations is very important including
several factors the topography of the area and the usage of the decision support models
could fulfill the requisites and shows the optimal outcome. It means modelling,
formulation and determining solution of the site problem that can be implemented in
establishing facilities in the selected area. Different literatures show that there are
different approaches for selecting the optimal location for wind power plant site, as
follows Haydar et al. [1] defining the optimal area in university for a station of wind
observation based on Analytical Hierarchy Process (AHP) approach. Bhatnagar et al.
[2] the establishment of gas stations and power plants using location factor as multi-
criteria. Afshartous et al. [3] to determine the location of the coast guard air station
based on Improved Optimization Model. Gamboa et al. [4] determining wind plant site
selection as a multi-criterion used social framework. Choudhary et al. [5] determined
site selection of thermal power plant based on Fuzzy DEA. As it is evident from the
previous studies, the site selection is of prime concern for establishing a facility at some
place. It needs multitude factors to be considered, making the decision hard and
required complex modeling. In this study, the method based on Dual Data Envelopment
Analysis (DEA) approach with multi-criteria is used as site selection mechanism for
wind power plants construction within Indonesia. In Indonesia the energy demand is
growing dramatically than population. At present, Indonesia have six main types of
power plant use gas, steam turbines, combined cycle, geothermal, diesel engine, and
hydro-power where fossil fuel is the major energy generation [6]. In this decades, for
genererating the electricity in Indonesia, the resources up to 96% using fossil fuel and
just 4% uses renewable energy. Hence, the government policy targets a portion of
renewable energy resources to be increased up to 17% in 2025 [7]. The current energy
policy in Indonesia is central in Fossil fuel. Decreasing of fossil fuel resources and
growing environmental concerns are challanging viewpoint in Indonesia’s energy
policy which leads to the propose of using renewable energy to increase energy
efficiency [8]. Indonesia as a archipelago country, having huge potential for wind
power generation because of high wind rate in most of the regions. The criteria of wind
turbine site selection should be selected carefully before making decisions.
Determining the potential of using the wind power in the possible region is
important. In spite of the comprehensiveness in location considered for the optimization
of wind power plants, the criteria and the method for the site selection that will be used
to compare the potential of the region must be carefully selected. Location problem
includes simulation, formulation and model in establish the facility in every region
which is likely to have multiple factors and is difficult for the analysis. The quantitative
approach must be used to determine the suitable locations.
1.2 Objectives of Propose Study
This study considers an integrated mathematical approach for location
optimization of wind plants. Determining all criteria that significantly influences the
establishment of a wind farm in Indonesia is important. The implementation of the
proposed approach to decide the most suitable location for building of a wind power
plant in Indonesia is based on a Dual Data Envelopment Analysis (DEA) for wind farm
power plant.
The advantages of this proposed study hopefully can be used as the alternative
approach to decide site selection, generally in any case and especially in wind plant
power plant. This proposed study can help improve the reseach which have correlation
with location optimization in wind farm location on the other location.
Literature Review
As a consideration of the literature, the proposed study refers several studies
which have been reviewed as a reference. Section 2.1 show the insight of the literature
review. Section 2.2 presents research gap which is used in the proposed study. Herewith
is further description of the research and the comparison of the previous studies.
Data envelopment analysis (DEA) is for analyzing the performance efficiency
of the comparable units called decision-making units (DMUs) as quantitative method.
Every DMU performs the same purpose by using ratio between input and output criteria
which are characterized by the modeled system [9]. Several references which have used
DEA for site selection such as Ertek et al . [10] for determining the efficiency of on-
shore wind turbines they provided data centric analysis. Saglam, U [11] The goal of
those paper was to evaluate quantitatively efficiencies of 39 states wind power
performance for electricity generation by using multi-criteria methods as DEA. Wu et
al. [12] in China to perform efficiency assessment of wind power plant used based on
two stage of DEA. These studies identified potential inefficicient factors and try to seek
out the factor which can improve the performance of wind farm. Azadeh et al. [9]
provided wind farm site selection under uncertainty using Hierarchical Fuzzy DEA.
Since traditional DDEA models cannot be used to combine the indicators especially in
qualitative data. Sueyoshi et al. [13] proposed an approach improvement as Range
Adjusted Measure (RAM) which is as integrated of DEA. Seiford et al. [14] proposed
the results from multi-stage DEA involved the input and output criteria which are
validated by Numerical Taxonomy and Principal Component Analysi. In this study,
the efficiency of DMUs in the selection of most suitable location for wind farm plant is
based on land cost, road accessibility, infrastructure cost, population density, supply
demand, natural vulnerability, wind velocity and total area. This research proposes a
multi-criterion apporach based on Data Envelopment Analysis (DEA) for analyzing the
most feasible wind farm site selection in Indonesia.
According of the literature that have been reviewed, the summary of the case
study is shown in Table 2.1. Table 2.2. lists the criteria which are significant influence
in the site selection of wind farm. Therefore, the methods based on the quantitative
approach that have been used are shown in Table 2.3. Further information shows in the
describe as below:
Table 2.1 The summary of case study
Year Case Study
Saglam, Ümit
2017 efficiency assessments of 39 state’s wind power location
using A two-stage data envelopment analysis in the United
Yunna Wu, et
2016 Efficiency assessment of wind farms location using two-stage
data envelopment analysis in China
Azadeh, Ali et
2013 Location optimization of wind power generation systems
under uncertainty using hierarchical fuzzy DEA in Iran
2010 Location optimization of wind plants by an integrated
hierarchical Data Envelopment Analysis in Iran
Ertek, Gürdal
2012 Insights into the efficiencies of wind turbines using data
envelopment analysis
Table 2.2. Summarizes the relevant criteria in the wind farm site selection
Year DMU Input
Annual Land Lease
Payments ($)
Wind Industry Employment,
Auxiliary electricity
consumption,
Wind power density
Electricity
Average wind blow
Azadeh, Ali
Level 1 Land Cost
Level 2 Intensity of
occurrence,
Level 1 Population and human
labor, Distance of power
distribution networks,
Level 2 Average wind blow,
Quantity of proper geological
areas, Quantity of proper
topographical
Consumer proximity
distribution
topographical areas
Diameter of Plant
Nominal Output (kW)
Table 2.3. Summarizes the relevant methods in the wind farm site selection
PCA NT Tobit
Saglam, Ümit [11]
Yunna Wu, et al [12]
Azadeh, Ali et al [15]
Azadeh, Ali et al [9]
Ertek, Gürdal et al [10]
Where: DEA (Data Envelopment Analysis), PCA (Principal Component Analysis), NT
(Numerical Taxonomy).
The research gap of this proposed study is wind farm site selection in province
of Indonesia using multi-criteria approach based on hierarchical dual Data
Envelopment Analysis (DEA). The integrated data envelopment analysis will be
applied on two levels of DEA, the first level considers finding the best suitable province
in Indonesia and the second level focuses on sub-district within the province based on
the distance from remote areas. The possible factors used in the districts level as defined
by land cost, population in region, ratio of free usage area, primary road, secondary
road, tertiary road, and total cost of infrastructure. In the provinces level as defined by
wind velocity, population in province, total area, electricity consumption, less of land
slide, flood, earthquake and volcanic eruption. Determining the efficiency for districts
and province level based on Hierarchical Dual Data Envelopment Analysis. Hesitant
Fuzzy Linguistic Term Set (HFLTS) for determining the weight for importance criteria.
The validation of the significant criteria based on Principal Component Analysis
(PCA). Finally, comparing three methods for deciding the most suitable location for
wind turbine site selection in Indonesia.
Research Methodology
In this chapter further information about the criteria and methods used in this
proposed study is described. Section 3.1 provides description of the possible factors
which have influence to the wind farm site selection. Section 3.2 presents the methods
which are applied in this proposed study.
Based on the literature review, the proposed factors used in this study are
districts (Level 1) and provinces (Level 2) of Indonesia as shown in Figure 3.1. The
integrated model for wind farm site selection organizes the factors into two levels
defined as input and output. The optimization technique is based on Dual Data
Envelopment Analysis method to find the most efficient location. The integrated level
criteria are developed to select the most suitable location in term of province of
Fig.3.1 Maps of provinces in Indonesia
3.1.1 Level 1 Criteria
The objective of using level 1 criteria is to determine the most suitable province
in Indonesia for establishment of wind farm plant based on the efficiency of the
location. The Level 1 criteria are:
Land cost by districts in Indonesia: the land cost has become an important
criterion due to the unprecedented increase in Indonesian population, which must be
included for site selection. For selecting a wind farm site, it requires more spacious area
as compared with other energy sources. Table 3.1 shows the comparison of the amount
of the land required for the construction of each kind of facility [16]. Area required for
wind farm is up to 9900 km
/GW/year which is 283 times more than coal plant. Its
means that the land cost is the main important criterion for wind farm site selection.
Figure 3.2 shows the data of land costs in some districts in Indonesia.
Fig.3.2 Land cost of districts in Indonesia
Table 3.1 Comparison of the land requirement in different power plant [16]
Land use in km2/GW per year
Wind power plant
Hydroelectric
Natural gas
The type of road infrastructure: Good road accessibility to the constructed
facility is one of the most importance considered factor for reliable, timely
transportation and distribution of goods to and from the facility. Different road facilities
(i.e., primary, secondary and tertiary roads) have different distribution lead time which
can affect the accessibility to the facility. Data of the road infrastructure are shown in
Figure 3.3. Primary and secondary roads are main roads and can be used for the
transportation of heavy goods. On contrary to this, tertiary roads are mostly used as
connectors to the primary and secondary roads such as, small bike roads and village
roads. Hence, for timely distribution of goods to and from the wind farm need the most
effective routes. In this study, primary and secondary road infrastructures are used as a
preference indicator for wind power plant construction.
Fig.3.3 Types of road infrastructure
Relevant data, especially types of road infrastructure within each district in
every province of Indonesia, will be used. Firstly, finding the ArcGIS Maps for every
district from the Ministry of Public Works and Public Housing of Indonesia’s data
representing the infrastructures maps in every region such as types of road as well as
natural resources. By using the ArcGIS, national roads, province roads are defined as
primary road, in the maps are shown as dark red line. The district and regional roads
are considered as secondary road type represented as light red line on the maps. The
tertiary road is one of important criterion which should be careful determined and set,
due to the limited resources in ArcGIS. They can be determined by looking for village
roads or small roads which are less than 3.6 m in width. In here, the types of road
infrastructure by ArcGIS maps and google maps. Fig. 3.4. represents the difference
types of primary roads and secondary roads.
Fig.3.4 Types of road infrastructure in Medan North Sumatra
The border point between the primary and secondary roads is used to determine
the distance of the roads. Fig.3.5 shows the distance of primary and secondary roads in
Medan Region. It shows that primary road as the significance distance in Medan City
is 18.6 km and for secondary road is 9.8 km. The distance is based on a spotted location
in remote region which is suitable to establish a wind farm. Due to the good
infrastructure in the main region of Medan, there is no need for tertiary road so this
region just have 0 km of it and do not need to build additional infrastructures.
Fig.3.5 Distance of the primary and secondary road infrastructures in Medan
Total cost of infrastructure (IDR): The construction of the infrastructure
requires a lot of capital cost incurred. So, selection of the site with less incurring cost
for building new roads to access the facility is also very much important to avoid extra
expenses thus increasing the overheads of the construction projects. The data in this
study is shown in Figure 3.6 which are the sites selected by the minimum capital cost
for the construction of tertiary roads with the shortest distance. In other words, if in any
case the construction of the infrastructure is inevitable and unavoidable, tertiary roads
are given preference over primary and secondary roads. In our approach we prefer the
construction of tertiary road as compared with secondary road if the width of the
dispatching vehicle is up to 5m. As the average width of the tertiary roads in Indonesia
is up to 3.6m and we included 1.4m to accommodate the convenience of shipment. So,
the minimum cost of infrastructure is another input criterion in DDEA model.
Fig.3.6 Total cost of infrastructure data
The total cost of infrastructure for each region is collected based on Widarno,
B et al (2015). The included components are labors, materials, tools and equipment as
shown on Table 3.2. as cost analyst for each 1 m length of road. As a result, the total
area of 1 m
is approximately 150,000 (IDR) (1 USD as 13,994.25 IDR). As an example,
from Fig.3.6. consider one of regions in South Sumatra where the selected region to
build infrastructure is Pagar Alan. In Pagar Alan, there are up to 159.1 km as tertiary
road and needed to expand the road for shipping the wind power materials to the
location. The total cost for building tertiary roads in Pagar Alan is 159.1 x 1000 m x
150,000 IDR which is 23,865,000,000 IDR.
Table 3.2 Cost analyst for 1 m
length of road infrastructure
Population by district in Indonesia: for maintenance and operational
technicality in case of emergency the wind power plant should be established in regions
with easily available human resources. It can likely decrease the resources management
for the transportation cost of labors, accommodation of labors and expert availability
when needed. The choice of a centered place with easy accessibility of human resources
is an important output indicator in the DDEA modal calculation. Figure 3.7 shows the
population in districts of Indonesia.
No Component
Coefficient
Total cost (IDR)
Aggregate B class
Wheel loader
Motor grader
Vibratory loader
Pneumatic tire loader
Water tanker
Assisted tools
Total cost of labor per m
Equipment and tools
Fig.3.7 Data of population in districts
Ratio of free usage area: Areas with greater value of free area usage ratio near
to one are considered more suitable for establishment of the wind power plants. The
free usage area means the ratio between total area divided by population in each region.
The more available land is preferred and used as output in DDEA modal calculation.
Figure 3.8 shows the data of the free usage area ratio.
Fig.3.8 Ratio of free usage area
3.1.2 Level 2 Criteria
In the second level, the criterion of DDEA is to find the most appropriate
province in Indonesia for constructing wind power plants based on the geographical
and technical structures as input and output indicators for DDEA modal calculation.
The indicators in this level are mentioned as below:
Electricity consumption: This criterion based on the consumption of the
electricity which have been recorded in every province by Giga Watt per Hour (GW/h)
including general activity of electricity usage which are shown on Figure 3.9.
Fig.3.9 Data of electricity consumption in Indonesia’s Provinces
Natural disaster: The probability occurrence of natural disasters in the region
have significant impact on wind farm site selection. The damage caused by natural
disasters such as flooding, volcanic eruption, earth quakes, and land sliding have
menaces effect on site selection. Figure 3.10. shows the data of natural disasters in
provinces of Indonesia. These disasters may accumulate extra cost of maintenance, thus
increasing the maintenance and operational overheads of wind power plants. Selection
of the safe sites is very core fundamental in decision making for selecting locations for
new facility. These four main parameters (i.e., flooding, volcanic eruption and earth
quakes, land sliding) are included in the list of natural disasters as input indicator.
Fig.3.10 Data of natural disaster in provinces
Wind velocity: The wind velocity is the most important and primary criteria
which must be included in the model. Every province has different wind rate based on
the geographical features. Areas with greater wind velocity are the most suitable
locations for economic growth of energy generation. Based on the data on Figure 3.11
shows that several provinces have varieties of wind velocities. Low wind speed (LWS)
and high wind speed (HWS) are based on different configurations such as wind
resources, aerodynamics, and structural design/ analysis [17]. The aerodynamics loads
are smaller per unit length for the LWS blades but the increased span means that total
forces are closer or larger than the equivalent HWS blade. Due to that for construction
a wind farm in Indonesia should use the technology namely low speed wind turbines.
The design on LWS and HWS blades differ in the blade’s lengths and the magnitude of
aerodynamic loads [17]. Average wind speed in provinces on Indonesia are including
in low to medium of wind speed according to Table 3.3. Low and medium wind speed
sites are mostly classified on Class II-IV. The design of low speed wind farm mostly
based on the blades structural design where blades typically lengthened versions up to
39 m. The materials for modern wind blades are primarily glass fiber reinforced
polymer structures.
Fig.3.11 Gravity loading; a. full blade; b. spar-only simplification
A wind turbine blade in low wind speed is a cantilever which is shown on Figure
3.11. Gravity loading causes edgewise bending, as illustrated in Figure 3.12, the
direction shows reverse twice per full rotation and on the maximum loading condition
as flap-wise bending when the wind direction is perpendicular on the blade [17].
Fig.3.12 Blade loading cases; a. edgewise bending; b. flap-wise bending
Fig.3.13 Data of wind velocity in provinces of Indonesia
Table 3.3 Wind class definitions [17]
Total area: Every province has different land use activities such as industrial
zones, housing schemes, available landscapes with respect to the total area of the
province. The province which has more spacious area is preferred. Because of the
importance of the available land it is considered as a great influential indicator in site
selection as output parameter.
Fig.3.14 Data of total area in provinces in Indonesia
Population by province in Indonesia: Generally, higher population in a
province is preferred hence it implies a higher supply for electricity. Areas with more
human being are given priority in order to minimize the cost of energy distribution to
the far or bounder places.
In this study have a multi-criteria approach to find the most suitable location for
establishment of wind farms. Based on this study, the concept of location as efficiency
in sub-region is defined for wind plants location. Figure 3.15. presents the flow chart
of this proposed study. The proposed study is starting by defining of input and output
Parameter (m/s)
Class III Class IV
Average wind speed
factors that already mention before, finding the data and analyst it, then measuring the
amount of the decision-making unit to verify the amount of input and output. Location
analysis by Dual Data Envelopment Analysis (DEA) in two level and combine it to get
the rank of the DEA results, after that would like to validate the result of DEA using
principal component analysis model to verify the significant influence of the criteria to
the DMU rank. The location optimization of the wind plant by DEA model are shown
by the most suitable location in sub-region of province in Indonesia.
Fig.3.15 Flow Chart of the Proposed Study
The propose methodologies which are used in this research topics are explaining
briefly as below.
This research considering multi-criteria approach to find the most suitable
location for founding a wind farm. Hence, this propose study consider location based
on the provinces and districts in Indonesia and find the appropriate location. Every
province and district in here become the decision-making units (DMUs) which are used
to measure efficiency score. Data envelopment analysis is a non-parametric and
multivariate method to measure DMUs implementaion. In this research, the method
based on the hierarchical dual form of DEA (DDEA) is used. The DMUs are calculated
using a mathematical method as Linear programming using empirical data of inputs
and output, then measure the performance scores using the ratio between input and
output to compare the performance scopes generated. The measure of efficiency for
DMU is given by following linear programming [18].
: the efficiency of DMU,
: weight given to DMU,
: input of DMU i,
: output of DMU r.
In this section, the hierarchical of total efficiency scores from two levels of
DDEA is illustrated. In Level 1, all districts are considered, where the districts in
province k is represented by a set J
using index j
. Level 2 as provinces level, where
K provinces, and each province is given by a subscript k . Combining results
from both levels consists of three steps [9], which are explained as follows:
Step 1: Normalize in Level 1 by scaling each efficiency value by the average efficiency
J represents the number of members in set
Step 2: Calculate the combine efficiency by multiplying the scaled value of
efficiency of Level 2 (
Step 3: Scaling the value of
is the total score between two levels.
In the scope of the study, wind turbine site selection which is one of the most
important problems related to sustainable energy have many alternatives and multi
criteria decision-making. Due to the uncertainty of decision makers in criteria choices,
the hesitant decision-making approach based on hesitant fuzzy linguistic term sets
(HFLTS) is chosen for solution of the complex problem. The upper bound and lower
bound weight ratio between criteria are used for calculating on hierarchical primary
data envelopment analysis. The algorithm hesitant fuzzy linguistic term sets are
proposed by Yavuz et al [19] which provides the capability to deal with hesitancy of
decision makers in assessment. The main of HFLTS is aim to advance flexibility and
completeness of linguistic importance based on the fuzzy linguistic approach.
Linguistic term is relating to language name which is used mostly in fuzzy to define the
uncertainty relation. Context free grammar such as at most, between and so on is the
figure for dealing with uncertainty relation. This algorithm combines the linguistics
term sets with context free grammar to handle the complexity of multi-criteria problems
with hierarchical structure using fuzzy approach.
The steps of the algorithm are shown as below,
Step 1. Defining the linguistic term sets S .
S = {no importance ( n ), very low importance ( vl ), low importance ( l ), medium
importance ( m ), high importance ( h ), very importance ( vh ), absolute importance ( a )}.
Step 2. Defining the context-free grammar G
= {lower than, greater than, at least, at most, between, and}.
Step 3. Collecting the preference relations provided by experts (
Step 4. Transforming the preference relations into HFLTS.
Step 5. Obtaining the envelope between pesimistic and optimistic preference relation
= round assigns in integer number.
Step 6. Computing the pessimistic and optimistic collective preference by linguistic
aggregation.
Step 7. Build the intervals utilities for the collective preference
Step 8. Normalize the collective interval vector to get the weight scores.
Ten experts from academician, NGO on renewable energy, Integrated energy
and environmental planning and policy of Indonesia, Engineers in wind turbine project
in Indonesia, and Technical officer at ASEAN Center for Energy have been asked to
evaluate the wind turbine site selection criteria in Indonesia using their expertise by
filling the fuzzy questionnaire.
Step 9. For every input and output ( q, r ), the weight ratio v
must be bounded by L
(lower bound) and U
(upper bound) as L
The example of the weight
ratio is the relation on lower bound as pessimistic in district level between land cost and
population in region is 3.00 and upper bound is 4.20 (see Table 4.8). The lower bound
weight ratio is (land cost (LC)/population in region (PinR)) ≥ 3.00. The upper bound
weight ratio is similar as (LC/PinR) ≤ 4.20. The same procedure is carried to all criteria
to calculate the priorities.
The fuzzy set can be in combined into the primary Data Envelopment Analysis
is determined by Amy H.I Lee at al [20]. In the early stage the fuzzy analytic hierarchy
process is applied to extract expert’s questionnaire to set the pairwise comparison
values which have been introduced from step 1 to step 9. The bounded weight ratio is
designed to measure the data envelopment analysis (DEA) efficiency of a specific
DMU. DMU is a unit under evaluation in here as provinces and districts level. The
primary data envelopment analysis can be expressed by [20]:
1,... ..., R
1,...q..., Q
is the weight given to the q -th input and
u is the weight output to the
r -th output.
is the amount of the q -th input of the k’ -th DMU,
Y is the amount of
the r -th output. Q is the number of inputs and R is the number of outputs and K is the
Reducing the number of variables under study and consequently ranking and
analysis of decision-making units (DMUs). The objective of PCA [12] is to reduce
ineffective indicators and also as a ranking methodology for determination the
efficiency of different units from the results of DEA. Discussing about principal
component analysis in here using IBM SPSS for knowing the importance of component.
The illustration how to find the importance criteria is applied in district level. The first
step, knowing how many components to extract in the analysis and looking on the Scree
plot by going to Analysis menu then dimension reduction and choose factor analysis is
illustrated in Fig. 3.16.
Fig.3.16 Extraction of Factor analysis in district level
Scree plot help to look for how many components should be extracted is shown
in Fig 4.17.
Fig.3.17 Scree Plot of district level
Looking at the break seems to be at about after the first three components so the
first three components definitely look like meaningful legitimate components and then
there’s a specific estrade component and it looks like the third component might be
something worth extracting. There is a more sophisticated approach to evaluate how
many components should extract an analysis in parallel analysis.
Based on the scree plot, will be extracted total for three eigen values consisting
of two eigen values which have values greater than 1 and one eigen value close to 1
from the analysis that’s why have to do it in three steps to analyze again in dimension
reduction. Choosing analyze with correlation matrix due to the variable are measured
in different units, this implies normalizing all variables using division by their standard
deviation is given in Fig. 3.18.
Fig.3.18 Extraction Box
The next step is chosen descriptive box and checklist on Coefficient, KMO and
Bartlett’s test of sphericity, and Univariate Descriptive is shown in Fig. 3.19. Going to
get the descriptive box to look at correlation matrix on Coefficient and KMO and
Bartlett’s test of sphericity as ferocity to tell whether should actually be doing of
component analysis to begin with and would typically want to look at univariate
descriptive x in any case.
Fig.3.19 Descriptive Box
Rotation Box is chosen for the next step is illustrated in Fig. 3.20. Choosing
Direct Oblimin as the rotation method. Direct Oblimin is an approach to produce an
oblique factor rotation that means the factors solution can be actually correlated with
each other and mostly used as familiar. If the factor solution is the most appropriate an
orthogonal uncorrelated effective solution then yield can be shown as a more or less
oblique orthogonal factor solution. Correlations between the three components that
have been extracted.
Fig.3.20 Rotation Box
Another options that’s good is wanting to sort the components factor loadings
more accurately. In this case to be sorted by size which makes it much easier to interpret
a component pattern matrix is given in Fig. 3.21 on Options Box.
Fig.3.21 Options Box
After interpreting the results, the significance criteria are obtained by principal
component analysis are used to measure the efficiency of the location both on district
level and province level. The multi-criteria approach based on the hierarchical Dual
Data Envelopment Analysis in Sub Section 3.2.1 and 3.2.2 are used to measure
efficiency score.
Results and Discussion
In the proposed hierarchical Dual Data Envelopment Analysis model, 33
provinces at Level 2 and 165 districts at Level 1 in Indonesia are used to define DMUs
for wind farm sites. The data are collected from the Statistical Department of Indonesia,
Internal Ministry of Indonesia, Indonesian Agency for Meteorology, Climatology, and
Geophysics, and The National Land Agency of Indonesia. Overall data are mentioned
in the Appendix A. Measuring the data assessment based on DDEA and hierarchical
methods from section 3.2.1 and 3.2.2. Level 1 calculates for measuring the performance
score for districts level. Level 1 becomes the basic level for combining with the score
from Level 2 where is provinces level.
The score of efficiency at the provincial level are shown in Table 4.1. The
province efficiency represents the priority of each province based on the location
Table 4.1 Efficiency and ranking of provinces (Level 2)
Efficiency No Province
East Kalimantan
East Nusa Tenggara
Southeast Sulawesi
South Sumatra
DI Yogyakarta
West Kalimantan
Central Sulawesi
West Sulawesi
West Sumatra
North Maluku
North Sulawesi
Central Kalimantan
DKI Jakarta
South Sulawesi
South Kalimantan
Riau Islands
Central Java
West Nusa Tenggara
North Sumatra
Bangka Belitung Islands
The 165 districts efficiency and rankings as Level 1 from 33 provinces of
Indonesia are given in Table 4.2. It shows that the most suitable district for establishing
a wind power plant is in Palembang, one of district in province of South Sumatra. The
location of this districts is on the remote of the province, one of the public facilities as
good transportation infrastructure to ship wind power plant materials by both river and
road transportation is mainly advantages. The geographical location also giving benefit
to the regions due to Palembang is less occur able to natural disasters. The wind rate as
natural resources with a decent average wind speed that can be used for economical
electricity generation.
Table 4.2 Efficiency score of districts (Level 1)
Rnk Province
Lhokseumawe
Subulussalam
Tebing Tinggi
Tanjung Balai
Pematangsiantar 0.190 115
Bukit Tinggi
Singkawang 0.158 129
Bengkayang 0.267 88
Rokan Hilir
Banjarmasin 0.380 63
Sungaipenuh
Barito Kuala 0.621 32
Lubuk Linggau
Rejang Lebong
Kotamobagu 0.164 124
Pangkal Pinang 0.164 125
West Bangka
East Belitung
Tanjungpinang
South Jakarta
Central Jakarta
East Jakarta
West Jakarta
North Jakarta
Tasikmalaya
Kulon Progo
Gunung Kidul
Sorong City
Probolinggo
Both efficiency between Level 1 and Level 2 are combined as hierarchical score
using hierarchical model for two level DMU in sub section of 3.2.2. Hierarchical Score
means the final score of hierarchical for two level of district and province as the
combination of efficiency score by both levels using DDEA. The ranking of province
is based on full efficiency. The result shows that the best location is in The South
Sumatra province, especially in Palembang district. West Papua, Papua, and Maluku
provinces also have high efficiency scores which are shown on Figure 4.1.
Fig.4.1 Hierarchical Score
Table 4.3 Detail of hierarchical score for provinces level
Hierarchical
West Sulawesi Polewali
North Maluku Morotai
Riau Island
DI Yogyakarta Gunung
The methodology for combining the results of two levels between province and
district levels using three steps procedure from section 3.2.2. The hierarchical scores
show the Dual DEA Results based on province level. Firstly, collecting two levels
efficiency. Then using first step to normalize every district with average districts in one
province. Repeating for every province, in here showing for 5 dominant provinces
which will discuss further with another methodology in the following sub section. After
normalizing the district efficiency, then combining with province level by multiplying
it with province efficiency which will give the hierarchical score for every district. The
last step is scaling the hierarchical district score with the highest one in each province
to get the maximize one. Finally, the hierarchical score for each province is determined
by averaging the results from the third step. The detail results are shown in Table 4.4.
Table 4.4 Hierarchical score for five dominant provinces
Pagar Alam 0.136
Prabumulih 0.256
Manokwari 0.301
Due to a lot remaining for the expert to decide with their subjective judgement
and expertise. Ten experts have been informed with the objective information and asked
to fill the significance of decision-making criteria using their expertise. After the
importance degree and the context free grammar are built in the first and the second
steps which are shown in the Table 4.5, then collecting preference relations were
collected from experts. The fuzzy questionnaire based on importance degree and
context free grammar to apply with the criteria in Level 1 and Level 2 are designed. In
here we do not show all relations matrices here, we show one example for all steps. The
illustration here is one of seven main criteria in district level. For province level, we
show the result as well in the following steps to combine the results by HFLTS to get
the hierarchical score using data envelopment analysis method.
Table 4.5 Importance degree and context free grammar on HFLTS
Importance Degree
Context free grammar
No importance (n)
Very low importance (vl)
greater than
Low importance (l)
Medium importance (m)
High importance (h)
Very high importance (vh)
Absolute importance (a)
The expert evaluation data shows in Table 4.6. is the one of expert evaluation
of the main criteria in district level with respect to the goal. Firstly, shows as discreate
sets and then converted to intervals. For example, the first expert preference the land
cost (LC) in relation to population in region (PinR) is “at least low importance” in
relation of linguistic terms and can be expressed in the discreate set as {low importance
(l), absolute importance (a)} as the interval set term [l,a], similarity for all relation term
set between every criteria in one expert linguistic evaluations. These evaluations are
proposed for ten experts for every level. After converting the relations term to interval,
the data were collected to determine envelops based on expert evaluations which are
shown in Table 4.7.
Table 4.6 Pairwise evaluations of one expert in main criteria on level 1
Expert1s Linguistic Evaluations
PinR at most h
Table 4.7 Obtained envelops for HFLTS
In the interval set for every evaluation represent the pessimistic in left hand site
and optimistic in right hand side as [P,O]. In here we show the calculation for
pessimistic and optimistic preference using two operations. The scale of the importance
degree is shown in Table 4.5. to the linguistic terms. Table 4.8. shows the pessimistic
and optimistic values. For instance, we show one of the examples for pessimistic and
optimistic preference by land cost (LC) with respect to Population in Region (PinR)
criteria is calculated as follows:
Pessimistic preference.
Optimistic preference.
Table 4.8 Pessimistic and optimistic preference in district level
3.0 4.2 3.2 4.0 2.7 4.0 1.9 4.2 2.6 4.2 1.4 2.4
3.4 4.4 3.0 3.6 3.7 4.6 3.0 4.1 2.4 2.7
2.0 2.8 1.6 2.6 -
2.1 3.2 2.0 4.3 1.6 3.5 1.0 1.4
2.1 2.8 2.4 3.0 2.8 3.9 -
3.5 4.0 4.7 5.1 1.2 2.2
1.8 4.1 1.5 2.3 1.7 4.0 2.0 2.5 -
3.0 4.0 1.3 2.0
1.9 3.4 1.9 3.0 2.5 4.4 0.9 1.3 2.0 3.0 -
3.6 4.6 3.3 3.5 4.6 5.0 3.8 4.8 4.0 4.5 4.4 4.7 -
The next step is looking for the linguistic intervals. The linguistic intervals are
calculated by using the average of pessimistic and optimistic values. For example, using
in one criterion as land cost (LC) as follows:
(2 1 3 1 4 0 5 4 6 4)
+ + + + + + + + +
(6 2 4 3 4 2 6 5 6 4)
(3.00 3.20 2.70 1.90 2.60 1.40) ,
(4.20 4.00 4.00
4.20 4.20 2.40)
(2.467), (3.833
The linguistic intervals are converted to interval utilities as known as the value
to get the midpoint by the average between pessimistic and optimistic values. The
weight value is obtained by normalizes the midpoint.
The linguistic interval, interval utilities, midpoint and weights of all seven
criteria in district level are given in Table 4.9.
Table 4.9 The linguistic interval, interval utilities, midpoint and weights
interval utilities
Midpoints Weights
m,-.117 h,-.267
m,-.217 h,-.500
After getting the weight ratio for every criterion in district level. We need to
look for the efficiency by using the ratio as constraint of criteria. Table 4.8. is ratio
relation of criteria in for province level is given in Table 4.10.
Table 4.10 Pessimistic and optimistic preference in province level
5.1 5.5 4.3 5.4 3.2
4.2 4.7 3.5 4.7 3.1 5.3
3.9 2.5 3.5
4.2 3.4 4.5 3.5 4.8 3.1
2.5 3.1 2.7
1.4 3.4 2.2
2.5 3.5 2.9 3.5
2.8 4.3 2.7 4.1 3.1 4.6 3.5 4.5
3.4 1.8 3.2
3.8 3.9 2.4 3.3 3.1 3.5
1.5 2.6 2.5 4.6 1.9 3.2 1.9 2.2
2.7 2.9 2.7 3.4
1.2 2.5 1.8 3.5 1.4 2.9 2.7 3.9 3.1 3.3
2.9 1.9 3.7 1.5 2.5 2.5 2.9 2.6 3.3
3.150 3.308 2.342 3.142 2.517 2.267 4.233
Pairwise comparison matrix is performed based on the fuzzy aggregation in
Table 4.8 for district level and Table 4.10 for province level. The constraints show the
lower bound and upper bound values as pessimistic and optimistic priorities in fuzzy
matrix, for showing the example of the priority range in district level as Step 9 in Sub-
Section 3.2.3. The constraints of the priorities for each criterion are given in Table 4.11
for district level and Table 4.12 for province level. Due to the space constraints in here
just for showing one example of the constraints for district level as Palembang district.
South Sumatra as representing for province level. The same procedure is applied for
each region in district and province level to get location efficiency.
Table 4.11 The constraint of the priorities for district level
Table 4.12 The constraint of the priorities for province level
Hierarchical DEA is run to evaluate the total score between district and province
level for wind turbine site selection after getting ratio of weight by HFLTS as seen in
Table 4.13, the result shows that, considering expert judgement on the importance of
significant criteria, South Sumatra as the most appropriate location for establishing
wind turbine power plant, following by west Papua, Papua, Maluku, and East of Nusa
Tenggara, respectively.
Table 4.13 Hierarchical Score for HFLTS
No Province
3.6238 13.1317
Prabumulih 0.0001
Manokwari 0.1218
Based on the scree plot in Fig. 3.17., will be extracted for total three eigen values
consisting of two eigen values which have values greater than 1 and one eigen value
close to 1 from the analysis that’s why have to do it in two steps to analyze again in
dimension reduction. Choosing analyze with correlation matrix due to the variable are
measured in different units, this implies normalizing all variables using division by their
standard deviation.
Fig.4.2 Correlation matrix on district level
Looking at the correlation on Fig 4.2 between Primary and Secondary road have
positive correlation 0.795 they seem to hang together when the primary road is needed
in wind turbine site criteria, Secondary can also necessary. But there is also some
negative correlation such as Land cost and population which are different in usual but
cannot expect too much such a thing as slightly not significant. We can see a lot of
positive correlation mostly on Primary, Secondary, Tertiary and Total Cost of
Infrastructure that very consistent, Overall have a lot positive correlation but there are
also have some negative correlation that’s not going to be real straight forward one
component extraction effects on the scree-plot. That true as three component extraction.
Fig.4.3 KMO and Bartlett’s Test on district level
The Bartlett’s test of sphrericity will be non-significant because see on Fig. 4.3.
in this case is statistically significant basically telling that at least one statistically
significant correlation matrix. On the Kaiser-Meyer-Olkin measure of Sampling
Adequacy is also more effect size measure is determining whether use principal
component analysis or not. 0.695 or up to 0.70 or higher is great the lower point is on
less than 0.40 this is the rule time that generally used. Overall on the correlation matrix,
KMO that are over than 0.40 and The Bartlett’s test is statistically significant this will
make confidence to perform the component analysis on district level.
Fig.4.4 Communalities on level 1
The Communalities is output from SPSS that shows the extraction based on
three components being extracted as shown on Fig. 4.4. Communalities represent
variance that have been counted from Component analysis. We can see that ratio of free
usage area have the largest amount of variance that being explained by component
analysis solutions as 99.6% of the significant criteria on wind turbine site selection,
following with total cost infrastructure and tertiary road, respectively. Overall the
communalities are good due to more than 50 % for each criterion.
Fig.4.5 Total variance on district level
The real important thing that should be interpret on column extraction sums of
squared loadings that have been extracted from the three components factor solutions
as given in total variance on Fig. 4.5. These are the eigenvalues 3.375 for the first
component, 1.835 for the second component, and following by the third component is
1.158. Overall the extraction sums of squared loadings have more than 1. The
cumulative percentage of variance and these are the rotated component solution
eigenvalues. SPSS technically calls rotations sums of squared loading as the
eigenvalues in the rotated component solutions which is oblique on scree plot that we
used for the first step of the analysis.
Fig.4.6 Component matrix of district level
The component matrix on Fig. 4.6 of component loadings is basically the
extraction method based on the unrotated solution just for showing the initial value and
we don’t need to interpret it.
Fig.4.7 Pattern matrix on district level
When we have oblique rotated component solution, we really want to use the
pattern matrix are given in Fig. 4.7. The pattern matrix is to help to identify the nature
of the components and what have here in the first component is total cost of
infrastructure is 92.2%, tertiary road is 92.2%, secondary road is 90.3%, and primary
road is 87.8% all loading nicely on this first component so wind turbine site selection
criteria seem to hang together to trade together as significant criteria. But that’s not
always exactly true because these factor loadings are not on all 0.95 but they are high
enough to suggest a pretty strong pattern. These the rest of the listed criteria as land
cost and ratio of free space don’t seem to load very strong only the exception would be
ratio of free space what do you use as a statistically significant component loading.
The second component has two major loadings that are land cost is 91.2% and
population 89.9% then it has negative component loading and if look at total cost of
infrastructure and tertiary road. its component loading to the first component and the
second component its one’s positive and one’s negative either one is very high positive
in first component. Mostly we choose positive value for both components and have a
significant decision or both have difference value on less of negativity.
The third component has one major loading that is ratio of free space area as
highly positive 99.8%. It is totally hanged to trade as significant criteria. So, we can
conclude that majority the percentage of significant criteria have more that 87% as in
the first component is total cost of infrastructure, tertiary, secondary and primary road,
for the second component is land cost and population, and the last component is ratio
of free usage area.
Fig.4.8 Structure matrix on level 1
The last table is the structured matrix which is actually the correlation between
each variable in the analysis and that sequence of respective component from the most
significant criteria to less significant criteria as given in Fig. 4.8.
On the District level we can conclude that have seven significant criteria which
influence on wind turbine site selection in Indonesia such as total cost infrastructure,
tertiary road, secondary road, primary road, population and land cost and we reduce
ratio of free space based on analysis of principal component analysis.
Due to same steps to do analysis using principal component. In province level
we can interpret the results directly.
Fig.4.9 Scree plot for level 2
Based on the scree plot which have been shown on Fig. 4.9, we can see on the
oblique shows on the first three component which have eigenvalue more than 1. Due to
that 3 components look like have meaning components and we can use it on extraction
Fig.4.10 KMO and Bartlett’s Test for Level 2
The KMO and Bartlett’s results test is given in Fig. 4.10 show that for KMO
measure of sampling adequacy is 0.660 is good enough to determine using principal
component analysis. The Bartlett’s test of sphrericity will be non-significant because in
this case is statistically significant basically telling that at least one statistically
significant correlation matrix. Overall on the correlation matrix, KMO that are over
than 0.40 and The Bartlett’s test is statistically significant this will make confidence to
perform the component analysis on province level.
Fig.4.11 Correlation matrix on level 2
Fig. 4.11 shows the correlation matrix on province level. Looking at wind
velocity column we can see that majority have positive correlation such as wind
velocity with population, electricity consumption, earthquake, volcanic eruption and
landslide, but have some negative correlation with total area and flood. Correlation
between wind velocity and population have positive 0.419 as dominant. Also looking
at other column, we can say as generally, overall have a lot positive correlation but
there are also have some negative correlation. It is meaning that more than one
component has extraction effects on the scree plot. We use three components for
extraction analysis.
Fig.4.12 Communalities on level 2
The results of variance being showed in the communalities table is given on Fig.
4.12 We can see that majority have good value of extraction. Population have the
highest amount of variance as 84.2% and wind velocity even have less amount still
more than 10 % for saying as a statistical criterion on 42.3%.
Fig.4.13 Total variance on level 2
The rotation sums of squared loadings are the most important thing to interpret
as the extraction results from three components factor solutions which are given in Fig.
4.13. These are the result 2.666 for the first component, 1.837 for second component
and the last as 1.118 for third component. These results show the position of component
after rotated component as scree plot on the early analysis.
Fig.4.14 Component matrix on level 2
The component matrix shows the initial component as unrotated solution as
given in Fig. 4.14. In here just show the early step before being rotated.
Fig.4.15 Pattern matrix on level 2
The pattern matrix helps to identify oblique rotated component solution is given
on Fig. 4.15. In first component we can see the positive loadings is population,
electricity consumption, earthquake, wind velocity, land slide and volcanic eruption.
The second component have 5 major loadings as volcanic eruption, landslide, flood,
earthquake and population. Wind velocity and electricity consumption have decreased
on few negativities and have not impact on changes. On third components just have two
loadings positive as Total area and earthquake but majority on negativity neither one is
very high. Overall, we can conclude that each criterion has positive loadings even in
just one component and have an impact on solution as the group of components. Due
to that, we can conclude that all of criteria have statistically significant and we do not
need to reduce the criterion.
Fig.4.16 Structure matrix on level 2
As we have discussed the function of structure matrix on Fig. 4.16 to show the
sequence of influence criteria. Looking at last criterion on total area, even on first and
two components give negative loadings but have a great trend on last component as
87% its look like increasing trend and have been impacted by rotated component
Fig.4.17 Component correlation matrix on level 2
Component correlation matrix is correlation between each component based on
rotated component solutions is given in Fig. 4.17. Looking at component 1 shows that
have correlation with component 2. Due to negativity on component 3 so component 1
have not correlation with it. Differently at component 2 have positive correlation for
component 1 and component 3. It is showing the good relation from rotated component
We can conclude that population, electric consumption, earthquake, wind
velocity, flood, volcanic eruption, landslide, and total area as the significant criteria
which are influencing on province level of wind turbine site selection in Indonesia.
Following results of significance criterion, multivariable ranking method namely
Principal component Analysis (PCA) is used for verifying a hierarchical DEA result.
The PCA ranking result is given in Table 4.14.
Table 4.14 Principal Component Analysis Results
The top five are chosen based on the three methods which are discussed.
Hierarchical data envelopment analysis (DEA) is one of multi-variable approach which
can measure efficiency score, in here the result represents the total score of the province
combine with district level. Hesitant fuzzy linguistic term set is used for measuring
uncertainty criteria which can influence in site selection, in this study the judgement,
expertise and advisement by the expert needed to evaluate the importance of the
criterion. After getting the hesitant criteria which have been proven, validation is
needed to validate the significance criteria. The top five suitable locations for
establishing wind turbine power plant in Indonesia are South Sumatra, Papua, West
Papua, Maluku and East Nusa Tenggara provinces, respectively as shown in Fig. 4.18
as geographically location.
Table 4.15 Comparison of three methods result.
The Table 4.15 shows that although using three methods differently still giving
the same priority ranking. Expert judgement can help with multi complex decision and
uncertainty condition. The fuzzy DEA results based on the expert advice giving the
same priority as South Sumatra have the highest priority to build a wind farm. It shows
that the importance criteria relation with specific bound weight are optimal used. The
significance criteria which are obtained based on principal component analysis shows
that the ratio of free usage area and total cost of infrastructure are highly influence to
the results in district level. The ratio of free usage area in South Sumatra is high. It
shows that more space area in one region is advantages. The availability of the
infrastructure of primary road and secondary road in each region have improved in
South Sumatra as primary concern. In this region do not need to build some additional
infrastructure in tertiary road. It can be decreasing the total cost of infrastructure. The
minimize total cost of infrastructure is preferable to influence the efficiency score. In
the province level some criteria such as population, electricity consumption and less of
natural disaster are the most influence to the total efficiency score. The availability
human resources in South Sumatra shows that higher spreading population is in
Palembang district. It can decrease the resources management for the transportation and
accommodation cost of labors. Electricity consumption as the demand in South
Sumatra is high are needed to show the amount of electricity distribution to the center
area. The establishment of wind farm in South Sumatra can help as the alternative
energy resources to fulfill the electricity demand. The third influence criteria in South
Sumatra is less of natural disaster. The South Sumatra as geographically located in the
Sumatra Island based on the occurrence of the disaster shows that in this region have
less of landslide, earthquake and volcanic eruption. Due to the reasons that South
Sumatra can be decided as the most suitable location to build a wind farm power plant.
Fig.4.18. Top five Provinces in Indonesia
Conclusions and Recommendations
Wind energy as natural energy resources is a renewable, freely available and
environmentally compared with other sources of fossil fuel, such as coal, and oil. In
this study, three methods are proposed to decide the most suitable location based on the
multi criteria approach. The hierarchical DDEA to determine the integrated efficiency
scores of DMUs between the district level and the province level. The Fuzzy Data
Envelopment Analysis is used for measuring the bound weight ratio for specific DMUs
based on the expert judgement, advice and expertise. The validation based on principal
component analysis to know the significance of criteria which are influences to the
wind turbine site selection in Indonesia. The possible factors used in the districts level
as defined by land cost, population in region, ratio of free usage area, primary road,
secondary road, tertiary road, and total cost of infrastructure. In the provinces level as
defined by wind velocity, population in province, total area, electricity consumption,
less of land slide, flood, earthquake and volcanic eruption. This method was applied to
33 provinces and 165 districts of Indonesia. The final result shows that the South
Sumatra province has the highest efficiency score which is the most economical
location for constructing a wind farm as given in Fig. 5.1. The most significant criteria
which influence on wind turbine site selection based on principal component analysis
in district level is ratio of free usage area, following by total cost of infrastructure, and
tertiary road. Population, electricity consumption and total area influence in province
level. This study is a milestone for policy makers, government and private stakeholders
in decision making for selecting the most suitable sites for wind power plant
construction in Indonesia. The hierarch DEA results can be used to assist decision
maker on selecting the most suitable wind farm site. The proposed approach can be
considered as an alternative solution, and an early study for policy makers.
Fig.5.1. Full Score of Three Methods
Further improvement could be on criterion specification, which includes social,
environmental, economic, and technical aspects. The final site selection will be more
practical, if opinions from experts, policy makers, government, and private stakeholders
are also considered in the analysis. Collecting more specific data is better approach to
improve the advance analysis in wind turbine site selection.
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Data Resources
Secondary Tertiary
Total Cost of Insfrastructure (Rp)
Land Cost (m^2) (IDR) Population Ratio of Free Usage Area
1 Lhokseumawe
International Samudera Pasee Port
0.000961954
2 Banda Aceh
Ulee Lheue Port
0.000260768
Kuala Langsa Port
0.001471452
4 Subulussalam
Tapak Tuan Port
Sabang Port
0.004018174
Belawan International Port
0.000107485
7 Tebing Tinggi
Kuala Tanjung Port
0.000182583
8 Tanjung Balai
Tanjung Tiram Port
0.000650507
9 Pematangsiantar
0.000200176
10 Padang Sidempuan
Angin Sibolga Port
0.000508371
Indonesian Port II
0.000795235
12 Bukit Tinggi
13 Payakumbuh
14 Pariaman
0.000773586
0.001119644
16 Pekanbaru
0.000739306
0.006147211
Roro sei Paknik Port
0.015205654
19 Rokan Hilir
Bandar Seribu Kubah Port
0.014195962
Tanjung Buton Port
0.020327493
Pelita Jambi Port
22 Sungaipenuh
0.003863805
23 Merangin
12540000000
0.023334964
24 Sarolangun
0.019972805
10140000000
0.019968846
26 Palembang
0.000238504
27 Pagar Alam
28 Lubuk Linggau
0.001928203
29 Prabumulih
0.001339522
0.012681875
31 Bengkulu
Bengkulu Pelindo Port
0.019223685
33 Rejang Lebong
0.006106364
0.011721471
35 Kepahiang
0.004604689
36 Bandar Lampung
Panjang Port
0.000253694
0.000381894
38 Pesawaran
0.004131816
39 Tanggamus
Piers Attorney Port
0.004759526
Mesuji Port
0.007219262
41 Pangkal Pinang
Balam Base port
0.000440483
0.009676137
43 Belitung
Tanjung Pandan Port
0.015064762
44 West Bangka
Muntok Port
0.015695255
45 East Belitung
Belitung Port
0.022880782
0.000932455
Bintan Lagoon International Port
0.009404433
48 Tanjungpinang
Sri Bintan Putra Port
Jagoh Port, Dabo Singkep
0.025916902
Tanjung Batu Port
0.003851233
51 South Jakarta
Tanjung Priok Port
7.30194E-05
52 Central Jakarta
4.69952E-05
53 East Jakarta
6.40404E-05
54 West Jakarta
5.56929E-05
55 North Jakarta
Patimban port
7.16703E-05
0.000120614
58 Sukabumi
0.001701338
59 Tasikmalaya
Cirebon port
7.65235E-05
61 Semarang
Tanjung Mas Port
0.000230531
Kartini Port
63 Pekalongan
Nusantara Port
0.000918491
64 Surakarta
8.33336E-05
65 Magelang
0.000874189
66 Yogyakarta
7.97317E-05
0.000540854
0.000556588
69 Kulon Progo
0.001431459
70 Gunung Kidul
0.001910713
9 Bangka Belitung Islands
71 Surabaya
Tanjung Perak Port
0.000124929
72 Pasuruan
Pasuruan Port
0.000179592
0.000962251
75 Probolinggo
Probolinggo Port
0.001582136
76 Tangerang
9.82831E-05
Karangantu Port
0.001237855
Binuangeun Port
0.003022535
0.000452853
80 Pandeglang
Labuan Port
0.002411539
81 Denpasar
Indonesian, Benoa Port
0.000202178
0.000758174
83 Buleleng
Buleleng Port
0.001693459
0.001878388
85 Klungkung
Nusa Penida Port
0.001486817
Lembar Port
0.000149914
0.006560921
0.011331574
89 East Lombok
0.013183075
6.03268E-05
0.013819754
Atapupu port
Aimere port
0.010114736
95 Southwest Sumba
Waikelo Port
0.004923854
96 Pontianak
0.000165556
97 Singkawang
0.002189248
98 Bengkayang
Teluk Suak Port
0.018115845
Dwikora Port
0.022756128
100 Kubu Raya
0.011666625
101 Palangka Raya
Sampit Port
0.009619972
102 Seruyan
Sigintung Port
103 Gunung Mas
10830000000
0.079523375
104 South Barito
0.072640819
105 Pulang Pisau
0.073659563
106 Banjarmasin
Trisakti Port
0.000113263
107 Banjarbaru
0.001712835
108 Balangan
12810000000
0.015468298
109 Barito Kuala
0.009883012
110 Tabalong
Semayang Port
0.016318037
111 Balikpapan
0.000881824
112 Samarinda
TPK Palaran Port
0.001040055
113 Bontang
Tanjung Laut Port
0.002520514
15300000000
115 Tarakan
Malundung Port
0.000402057
ASDP Manado Port
Bitung Port
0.001386097
118 Tomohon
0.001184512
119 Minahasa
Amurang Port
0.000337316
120 Kotamobagu
0.000564359
Pantoloan Port
0.001099374
122 Parigi Moutong
Tinombo Port
0.011573264
123 Donggala
Donggala Port
0.014808754
124 Banggai
0.027215227
Laut Poso Port
0.029833263
126 Makasar
Soekarno Hatta Makasar Port
Tanjung Ringgit Port
0.001404486
Awerange Port
0.005927867
129 Parepare
Indonesian Port 4
0.004098198
131 Kendari
0.000908998
Murhum Port
0.001452581
Nusantara Raha Port
0.008581761
Kolaka Port
0.016092558
135 Wakatobi
0.005185824
136 Gorontalo City
0.000414754
137 North Gorontalo
Anggrek Port
0.013724984
138 Bone Bolango
0.012621633
139 Pohuwato
Marisa Port
0.031105696
140 Boalemo
Tilamuta Port
0.010754041
Mamuju Port
0.017200453
Palipi Port
0.005775744
143 Polewali Mandar
Tanjung Silopo Port
0.003460092
0.014956338
145 North Mamuju
Pasangkayu Port
0.014791713
0.000802178
Kobi Sadar Port
0.051159097
0.003066602
0.080904472
Namlea Port
151 Ternate
A Yani Port
0.000522286
Sanana Port
0.026924368
153 Morotai
Morotai Ferry Port
0.039281012
Trikora Tidore Port
0.015951479
155 Halmahera
Tongute Port
156 Manokwari
Manokwari Port
0.016740203
Fak Fak Port
0.132854391
159 Sorong City
Sorong Port
0.002411024
160 Bintuni
Bintuni Port
0.276366927
161 Jayapura
0.068786799
162 Merauke
Merauke Port
0.200835771
163 Biak Numfor
Laut Biak Port
0.018800442
Nabire Port
0.068012791
0.071307552
Wind Velocity
Consumption
Volcanic eruption
General Optimization Model in IBM ILOG CPLEX
/*********************************************
* OPL 12.5.1.0 Model
* Author: Galih Pambudi
* Creation Date: Mar 17, 2018 at 11:23:37 AM
*********************************************/
//define indices
//the set of district name
//the set of input criteria
//the set of output criteria
//range of decision making unit in districts
//number of input
//number of output
//define parameter
// Data of inputs
// Data of outputs
// measurement of the DMU efficiency
//assert refDMU in DMU;
//decision variables
// variable of DMU efficiency
// variable of lambda value
//objective function
// minimize input
input constraint
output constraint
// shows report for DMU
"DMU Efficient"
"DMU Not efficient"
"lambda="
// Loop to measure efficiency for all DMU
// To implement Flow Control
thisOplModel
//generating the current model instance
//writeln("District ",dmu);
// modifying
lower bound of output
//one of CPLEX Optimizer’s MP algorithms to solve
postProcess
//to control and manipulatethe
* Creation Date: Mar 17, 2018 at 12:23:37 AM
//total of districts
//DMU reference
//total amount of input criteria
//total amount of output criteria
SheetConnection
"Theses Data.xlsx"
//data connection
with excel data
"I"
//read input table
"OPCA"
//read output table
//teta to SheetWrite(sheetData,SheetWriteConnectionString);
"wo"
"wi"
* Creation Date: Mar 17, 2018 at 18:23:37 AM
//the set of province name
//range of decision making unit in provinces
//writeln("lambda=",lambda);
"Province "
* Creation Date: Mar 17, 2018 at 19:23:37 AM
//total of provinces
"X"
"Y"
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This page provides information about the Bachelor programs BIM BBA BHM BTTM MTTM MBA MHM PGDPS provided by Tribhuvan University. Faculty of Management Tribhuvan University. 01-4332718, 01-4330818, 01-5907927 (Thesis) ... Results. MBS Thesis Status. TH. Code Ref. No. Dispatch Date Campus TU Reg. No. Student Name Year
The Faculty of Management (FoM), Tribhuvan University has its ultimate objective of educating students for professional pursuits in business, industry, and government. It is further dedicated to enhancing the knowledge and understanding of business and public administration. In this pursuit, FoM aims to develop networking with management ...
This page provides information about the Bachelor programs BIM BBA BHM BTTM MTTM MBA MHM PGDPS provided by Tribhuvan University. Kirtipur, Kathmandu, Nepal. Sun - Fri : 10.00 AM - 05.00 PM. 01-4332718, 01-4330818, 01-5907927 (Thesis) ... 01-5907927(Thesis) [email protected]. Quick Links Campuses Programs Syllabuses. Quick Links Student Transfer ...
Use Library Search to discover Tulane theses and dissertations in print. To browse a specific field, limit your search to Library Catalog (not Everything) and enter one of the following, replacing department name with your desired department.. Tulane thesis M.A. department name Tulane thesis M.S. department name Tulane thesis B.A. department name ...
Results; Certificate Verification(Email: [email protected]) University Grants Commission; Ministry of Education, Science and Technology; Office of the Prime Minister and Council of Ministers
Thesis & Dissertations. Permanent URI for this community. ... Subcommunities and Collections By Issue Date By Author By Title By Subject By TU Institute By Academic Level By TU Affiliated Institute By Other Institute By Advisor By Subject Category ... Results Per Page 1 5 10 20 40 60 80 100 Sort Options Ascending Descending .
Tribhuvan University. Kirtipur, Kathmandu, Nepal. Faculty of Humanities and Social Sciences. Kirtipur, Kathmandu, Nepal. About US Introduction Programs ... BCA Entrance Result (2024 Batch) 2024-09-08 2024-09-08. Examination Centre of M Phil-PhD I Semester : Batch 2023.
Tribhuvan University, Faculty of Humanities and Social Sciences, Dean's Office, Kirtipur, Kathmandu, Nepal has published guidelines for Thesis. This information ensures that the master's thesis submission process aligns with the highest academic standards, maintaining the integrity of the program and the university.
Recently, we have started using Digital Library Software Dspace for Full text Ph. D. Thesis and we are going to add more Dissertation, Report, Text book and course of study etc. in this software. ... Email: [email protected], [email protected]. Opening Hours. Summer: 10:00 AM to 5:00 PM. Winter: 10:00 AM to 4:00 PM. Quick Links. About us ...
Undergraduate dissertations and final-year projects are held in the libraries in hardcopy and online format. Taught postgraduate dissertations are available to use in the library and online. Research theses are also available in print and online formats. Input your program code e.g. TU856 or your program title e.g. BSc Computer Science.
Tribhuvan University. Kirtipur, Kathmandu, Nepal. Faculty of Humanities and Social Sciences. ... result. Admission. Resources Model Questions. Gallery ... Thesis Submission Date Extension Notice (For Master's Degree Only) 2023-04-27.
Tribhuvan University. Kirtipur, Kathmandu, Nepal. Faculty of Humanities and Social Sciences. ... Result of MA, 2nd & 4th Semester (2020 & 2021 Batch) 2023-06-30. FoHSS Admin Result of MA, 2nd & 4th Semester (2020 & 2021 Batch) Files. S.N Name Type Download; 1: CPDS II semester, Batch 2020 ...
As the name implies, this collection comprises books published in Nepal, written on Nepal, or in the Nepali language. It also includes theses and dissertations submitted by Ph.D. scholars and Master's degree students.
The TU e-Thesis System is a comprehensive management system for student theses, facilitating the submission of thesis files, plagiarism checks using the CopyCat system, and the publication of electronic theses. It also serves as a database for future plagiarism checks. Flowchart of TU e-Thesis System Steps 1. What is the TU e-Thesis System?
format of each level is illustrated below:In the level 1 and 2 headings, the paragraphs begin below the. eading, indented like a regular paragraph. In contrast, the headings from level 3 to 5 end with a period (.) and paragraphs begin right. fter the period, in line with the heading. An exampl.
Admission Test Result of BBA, BIM, BBM, BHM, BBA-F, BMS, BTTM & BPA Program Published for the admission year 2024. CMAT Result 2024_0001.pdf. Published Date: 2024-09-01. Exam Center for MBS, MPA, MBA-F, MBM, MBA-CL, MBA-M, MTTM, MHM and MATS 3rd Semester Regular Examination 2024. Center for Masters 3rd Sem 2024.pdf.
Faculty of Management Tribhuvan University Home Programs ... Student Transfer. LOGIN. Faculty of Management. Notice; Title: Result Published: BBA and BBM 1st Semester Regular Examination 2024 Description: Contact Us Office of the Dean. Kirtipur, Kathmandu, Nepal. 014330818, 01-4332118. 01-5195568(Exam) 01-5907927(Thesis) [email protected] ...
Thesis Postgraduate Program Thesis (Satisfactory) I Roll No. R-2020-AQU-08-M R-2021-AEC-07-M R-2020-VPA-06-M R-2021-HRT-09-M R-2020-VPA-07-M R-2021-AGR-06-M Name of the Students Sagar Chapagain Sudip Neupane Amrit Paudel Kishor Rayamajhi Bishnu K.C. Imran Ahamad Khan
Tribhuvan University, Faculty of Management has published Masters Degree Dissertation (Thesis) Writing Guideline (Format) 2019. These dissertation guidelines have been created as a guide to help Master?s level students establish minimum requirements, academic standards, the physical format and appearance of dissertation.
CEDECON has been offering Master's level program in Economics since its inception in 1960. The students are awarded with Master's of Arts in Economics (MA in Economics) degree after the completion of the prescribed course. While CEDECON was offering the MA Economics course under annual system, CEDECON has recently introduced semester ...
Post graduate MSc. program thesis result notice published by IAAS, Tribhuvan University (TU) Tribhuvan University, Institute of Agriculture and Animal Science have published roll numbers of students who have submitted their thesis work and has been marked satisfactory in the result published by the University at their notice below:
as the extraction results from three components factor solutions which are given in Fig. 4.13. These are the result 2.666 for the first component, 1.837 for second component. and the last as 1.118 for third component. These results show the position of component. after rotated component as scree plot on the early analysis.
Exam results will be released on Monday , 23rd September 2024 after 2pm. The Tallaght Campus TU Dublin, has completed an upgrade to their Student Record Management System (SRMS) and therefore the Student Self Service Account will change in look, feel, and is accessed by students through single sign on (SSO). As a TU Dublin Tallaght Student, you ...