Load Flow and Security Analysis of Power System in Tiga Nusa.
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On the potential and progress of renewable electricity
generation in Bali
Kumara, I.N.S.,
Ariastina, W.G.,
Sukerayasa, I.W.,
Giriantari, I.A.D.
2015
Years
Documents
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2015 Proceedings 2014 6th
International Conference
on Information
Technology and
Electrical Engineering:
Leveraging Research
and Technology Through
UniversityIndustry
Collaboration, ICITEE
2014
0
Publication range: 2001 2015
References: 82
Source history:
Journal of Electrical and Electronics Engineering, Australia
View documents
Proceedings 2013 International Conference on Information
Technology and Electrical Engineering: "Intelligent and Green
Technologies for Sustainable Development", ICITEE 2013
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Proceedings of the IEEE International Conference on
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Microhydro powerplant for rural area in Bali to generate
green and sustainable electricity
2007
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Kumara,
2014 Proceedings 2014
Suparyawan, D.P.D.,
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on Smart Green
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and Information
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Greener Globe Through
Smart Technology,
ICSGTEIS 2014
0
2014 Proceedings 2014
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on Smart Green
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and Information
Systems: Towards
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ICSGTEIS 2014
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on Smart Green
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2/2
ISBN : 978-1-4799-6125-2
Bali, 5 - 7 November 2014
ICSGTEIS 2014
Load Flow and Suplly Security Analysis of Power
System in Tiga Nusa;
Before and After the Application of 20kV Submarine Cable
IW. Sukerayasa, IAD. Giriantari, YMA. Prawira
Department of Electrical Engineering
Udayana University, Bali, Indonesia
sukerayasawayan@yahoo.com, dayu.giriantari@unud.ac.id
Abstract— Tiga Nusa is a region consist of three small islands:
Nusa Penida, Nusa Lembongan, and Nusa Ceningan, that located
southeast of Bali Island. Those three small islands have many
magnificent diving sports that are famous among divers all over
the world. Therefore, this region becomes one of tourist
attraction initiate rapid development. Energy demand in this
region is increasing significantly. The power supply of this region
is isolated from Bali Island. The utility company is trying to get
supply from Bali Island by connecting this region through 20kV
submarine cable. This paper presents the load flow analysis and
supply security analysis of the Tiga Nusa system before and after
the submarine cables operated.
submarine makes some changes to the load flow of the power
system. This study discusses the load flow and supply security
before and after the application of submarine cable. This paper
also shows the difference of the application of 1 and 2
submarine cables.
Software is utilized for this study. Firstly, single line
diagram of the system is drawn as seen on Fig. 1, then the load
flow is calsulated.
Load flow analysis has found that power loss increase when
submarine cable operates. Voltage drop is not significantly
improved but it moved from Nusa Lembongan to Nusa Penida.
However the supply security is until year 2033 if 2 submarine
cables operate.
Keywords—Tiga Nusa; energy demand; submarine cable;
power loss; supply security
I. INTRODUCTION
Tiga Nusa region has total area 20,284 km2consist of three
small island; Nusa Penida, Nusa Lembongan, and Nusa
Ceningan[1]. The distribution power system of this region was
isolated to Bali island This region was supplied by diesel
generators, PV Solar System, and wind generation. The
availability capacity of power generation was 4,866 kW and it
peak demand was 2,492 kW[2]. The three islands are famous of
their magnificent diving sports which initiate rapid
development in this region. Energy demand in this region is
increasing significantly due to the rapid development of tourist
facilities.
II. RESULT AND DISCUSSION
A. Load Flow Analysis
Software is utilized for load flow analysis in order to find
the power loss and voltage drop due to new supply from
submarine cables. The capacity of each submarine cable is
13MW. The result of the power loss before submarine cables
were applied is shown in Fig.1. It found that network losses is
0.046 MW and the total generation is 1,785 MW, therefore the
power loss is 2.57%.
In order to provide enough supply with low cost, the utility
company is trying to get supply from Bali Island by
connecting this region to Bali Island through 20kV Submarine
cable. There are 2 lines of XLPE 240mm2 submarine cables
laid connecting two points: GH Pering in Bali Island and GH
Jungut Batu at Nusa Lembongan. The application of
-28-
ISBN : 978-1-4799-6125-2
Bali, 5 - 7 November 2014
ICSGTEIS 2014
Power loss (%)
6
5
5.07
4
3.76
3
2
2.57
1
0
Fig. 1 Software report before application of submarine cable
Existing
Software report of the Tiga Nusa system for the application
of 2 submarine cables is shown in Fig.2. It shows that the
network losses is 0.068 MW and the total generation is 1,807
MW therefore the power loss is 3.76%.
2 Submarine Cables
1 Submarine Cable
Fig. 4. The power loss of 3 different supply
This study also found the voltage drop which initially
exhibited in Nusa Lembongan and Nusa Ceningan are
decreased when supply come from the submarine cables due to
the largest supply moved forward. In contrary, voltage drop in
Nusa Penida is increased because the largest supply moved to
other Island. Table I shows the voltage drop and its location for
existing system and when supply come from submarine cables.
TABLE I. VOLTAGE DROP AND ITS LOCATION
LOCATION
EXISTING
Fig. 2. Software report after application of 2 submarine cables
The software report the system if only 1 submarine cable is
applied is shown in Fig.3. It shows that the network losses is
0.093 MW and total generation in 1,832 MW therefore the
power loss is 5.07%.
VOLTAGE VOLTAGE VOLTAGE
RATING
BUS
DROP
Nusa Penida (NP0042)
20 kV
19.427
2.86%
Nusa Penida (NP0066)
20 kV
19.425
2.87%
N.Lembongan (JB0016)
20 kV
19.108
4.46%
N Lembongan (JB0003)
20 kV
19.089
4.55%
Nusa Penida (NP0042)
20 kV
19.326
3.37%
2 SUBMARINE Nusa Penida (NP0066)
CABLES
N.Lembongan (JB0016)
20 kV
19.324
3.38%
20 kV
19.723
1.39%
N.Lembongan (JB0003)
20 kV
19.768
2.47%
Nusa Penida (NP0042)
20 kV
19.059
4.71%
1 SUBMARINE Nusa Penida (NP0066)
CABLE
N.Lembongan (JB0016)
20 kV
19.057
4.72%
20 kV
19.462
2.69%
N.Lembongan (JB0003)
20 kV
19.507
2.47%
Energy loss is calculated based on load factor and loss
factor of the system. Load factor and loss factor are calculated
by using average peak load and average load, and it found that
the average load factor is 0.68 and average loss factor is 0.50.
The power loss existing is 45kW; with 2 submarine cable is
78kW; with 1 submarine cable is 105kW. Based on those
number energy loss is found increased significantly when
supply come from submarine cable. Energy loss existing is
201,480 kWh, if supply from 2 submarine cables energy loss is
297,840 kWh, and if only 1 submarine cable energy loss is
407,340 kWh. Fig. 5 shows the increased of energy loss.
Fig. 3. Software report if only 1 submarine cable is applied
Hence, we can see that power loss is increasing when there
is more supply from the submarine cables. The largest power
loss found if supply delivered by only1 submarine cable. Fig.4.
shows the different power loss of existing, when supply comes
from 2 submarine cables and when only 1 submarine cable.
-29-
ISBN : 978-1-4799-6125-2
Bali, 5 - 7 November 2014
Scenario 2 is the condition when 2 submarine cables
operated. It is found that large supply from Bali Island result in
large reserve power. The largest supply is from submarine
cable which has power 13 MW each. When one of this cable is
off there will be still enough supply to the system. Therefore
the supply system is secure until the year 2033. Table III shows
the detail of the scenario 2.
Energy loss
450,000
400,000
350,000
300,000
kWh
ICSGTEIS 2014
250,000
TABLE III. SUPPLY SECURITY FOR SCENARIO 2
200,000
150,000
YEAR
PEAK
LOAD
(MW)
1
2013
2.73
4.22
1.49
Secure
2014
3.00
17.22
14.22
Secure
2015
3.29
14.72
11.43
Secure
2016
3.61
14.72
11.11
Secure
B. Supply Security
2017
3.96
14.72
10.76
Secure
Supply security analysis is done in order to know the ability
to supply of the Tiga Nusa power system due to the increasing
demand by the year. The supply system consider secure if it
can maintain the continuity of supply to the load even the
largest supply is off which is known as N-1 method. Supply
system is secure when it has enough reserve power ± 30% of
total power.
2018
4.33
14.72
10.39
Secure
2019
4.73
14.72
9.99
Secure
2020
5.16
14.72
9.56
Secure
2021
5.61
14.72
9.11
Secure
2022
6.09
14.72
8.63
Secure
2023
6.60
14.72
8.12
Secure
2024
7.13
14.72
7.59
Secure
The study apply 3 scenarios: scenario 1 is existing
condition; scenario 2 is system with 2 submarine cables;
scenario 3 is system with only 1 submarine cable. The
submarine cables operate in 2014.
2025
7.69
14.72
7.03
Secure
2026
8.27
14.72
6.45
Secure
2027
8.89
14.72
5.83
Secure
2028
9.52
14.72
5.20
Secure
Existing condition, where the largest supply is from diesel
generator in Nusa Penida with its power is 1.480 MW. It is
obviously not secure when this generation is off. It is shown in
Table II.
2029
10.19
14.72
4.53
Secure
2030
10.88
14.72
3.84
Secure
2031
11.59
14.72
3.13
Secure
2032
12.34
14.72
2.38
Secure
2033
13.11
14.72
1.61
Secure
100,000
50,000
Existing
2 Submarine Cables
1 Submarine Cable
Fig. 5. Graph of energy loss
TABLE II. SUPPLY SECURITY OF SCENARIO 1
YEAR
PEAK
LOAD
(MW)
N-1
CONDITION
(MW)
RESERVE
POWER
(MW)
2013
1
2.73
2
1.72
(3)=(2)-(1)
-1.01
Not secure
2014
3.00
1.72
-1.28
Not secure
2015
3.29
0.24
-3.05
Not secure
2016
3.61
0.24
-3.37
Not secure
2017
3.96
0.24
-3.72
Not secure
2018
4.33
0.24
-4.09
Not secure
2019
4.73
0.24
-4.49
Not secure
2020
5.16
0.24
-4.92
Not secure
2021
5.61
0.24
-5.37
Not secure
2022
6.09
0.24
-5.85
Not secure
2023
6.60
0.24
-6.36
Not secure
2027
8.89
0.24
-8.65
Not secure
2028
9.52
0.24
-9.28
Not secure
2029
10.19
0.24
-9.95
Not secure
2030
10.88
0.24
-10.64
Not secure
2031
11.59
0.24
-11.35
Not secure
2032
12.34
0.24
-12.10
Not secure
2033
13.11
0.24
-12.87
Not secure
N-1
CONDITION
(MW)
2
RESERVE
POWER
(MW)
(3)=(2)-(1)
NOTE
The supply security of the Tiga Nusa system for scenario 3
which only 1 submarine cable is operated shows that will
secure until end of the year 2014. The largest supply is come
from the submarine cable, therefore when the only one
subamarine cable is off the system is supplied only from the
diesel genartor in Nusa Penida. Table IV shows the security of
the supply yearly.
NOTE
It is shown that there have to be 2 line submarine cables in
order to secure the supply to Tiga Nusa region. If there is a
problem in 1 line submarine cable, the system still get supply
from other line. The system will become more fragile if there is
only1 line supply to the region.
-30-
ISBN : 978-1-4799-6125-2
Bali, 5 - 7 November 2014
TABLE IV. SUPPLY SECURITY OF SCENARIO 3
YEAR
PEAK
LOAD
(MW)
1
N-1
CONDITION
(MW)
2
RESERVE
POWER
(MW)
(3)=(2)-(1)
NOTE
2013
2.73
4.22
1.49
Secure
2014
3.00
4.22
1.22
Secure
2015
3.29
1.72
-1.57
Not secure
2016
3.61
1.72
-1.89
Not secure
2017
3.96
1.72
-2.24
Not secure
2018
4.33
1.72
-2.61
Not secure
2019
4.73
1.72
-3.01
Not secure
2020
5.16
1.72
-3.44
Not secure
2021
5.61
1.72
-3.89
Not secure
2022
6.09
1.72
-4.37
Not secure
2023
6.60
1.72
-4.88
Not secure
2024
7.13
1.72
-5.41
Not secure
2025
7.69
1.72
-5.97
Not secure
2026
8.27
1.72
-6.55
Not secure
2027
8.89
1.72
-7.17
Not secure
2028
9.52
1.72
-7.80
Not secure
2029
10.19
1.72
-8.47
Not secure
2030
10.88
1.72
-9.16
Not secure
2031
11.59
1.72
-9.87
Not secure
2032
12.34
1.72
-10.62
Not secure
2033
13.11
1.72
-11.39
Not secure
ICSGTEIS 2014
III. CONCLUSION
The utilization of submarine cables to deliver power to the
Tiga Nusa region has caused a significant power loss and
energy loss to the system in the region. The supply security to
the region is much better until the year 2033 if 2 submarine
cables are utilized. In contrary, the supply security is drop in
the year 2014 if 1 submarines cable is utilized.
REFERENCES
[1] http://www.klungkungkab.go.id/index.php/profil/15/
Kondisi-Geografis, accessed on 19 Maret 2013
[2] PT. PLN (Persero) Area Bali Timur , Peak load Bali
Timur Feeder 2005-2012(Beban Puncak Penyulang Bali
Timur 2005 s.d. 2012 ). Klungkung:
[3] Daniel Rohi, dkk. Vol II, No.1 Juni 2008, Journal
EECCIS. Application of Load Flow for Energy Loss
Estimation in 20kV Radial Distribution system (Aplikasi
Pendekatan Aliran Daya untuk Estimasi Rugi Rugi
Energi Sistem Distribusi Radial 20 kV).
[4] Momoh,
James
A.
Electric
Power
Distribution,Automation, Protection, and Control. Taylor
and Francis Group, CRC Press. 2007: 44-45
[5] Fujikura Shanghai Cable LTD, The development of
20kV submarine cable interconnection system Bali-Nusa
Lembongan (Pembangunan Sistem Interkoneksi Kabel
Laut 20 KV Bali–Nusa Lembongan)
[6] PT. PLN (Persero) Area Bali Timur,, Power Generation
in Tiga Nusa Klungkung (Pembangkit Tiga Nusa.
Klungkung):. 2013.
-31-
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Giriantari, I. A D
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Universitas Udayana, Department of Electrical
Other name formats: Giriantari
Engineering, Bali, Indonesia
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On the potential and progress of renewable electricity
generation in Bali
Kumara, I.N.S.,
Ariastina, W.G.,
Sukerayasa, I.W.,
Giriantari, I.A.D.
2015
Years
Documents
Citations
Author History
Set document feed
2015 Proceedings 2014 6th
International Conference
on Information
Technology and
Electrical Engineering:
Leveraging Research
and Technology Through
UniversityIndustry
Collaboration, ICITEE
2014
0
Publication range: 2001 2015
References: 82
Source history:
Journal of Electrical and Electronics Engineering, Australia
View documents
Proceedings 2013 International Conference on Information
Technology and Electrical Engineering: "Intelligent and Green
Technologies for Sustainable Development", ICITEE 2013
View documents
Proceedings of the IEEE International Conference on
Show abstract | Related documents
Microhydro powerplant for rural area in Bali to generate
green and sustainable electricity
2007
Sort on: Date Cited by ...
View in search results format
Add all to list |
Citations
hindex: 1
Documents
Citations: 4 total citations by 4 documents
Kumara,
2014 Proceedings 2014
Suparyawan, D.P.D.,
International Conference
Ariastina, W.G.,
on Smart Green
Sukerayasa, W.,
Technology in Electrical
Giriantari, I.A.D.
and Information
Systems: Towards
Greener Globe Through
Smart Technology,
ICSGTEIS 2014
0
2014 Proceedings 2014
International Conference
on Smart Green
Technology in Electrical
and Information
Systems: Towards
Greener Globe Through
Smart Technology,
ICSGTEIS 2014
0
2014 Proceedings 2014
International Conference
on Smart Green
Technology in Electrical
and Information
Systems: Towards
Greener Globe Through
Smart Technology,
ICSGTEIS 2014
0
Properties and Applications of Dielectric Materials
View documents
View More
Show Related Affiliations
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Economic cost study of photovoltaic solar system for
hotel in Nusa Lembongan
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Kumara, I.N.S.,
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Load flow and suplly security analysis of power system Sukerayasa, I.W.,
in Tiga Nusa; Before and after the application of 20kV
Giriantari, I.A.D.,
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Prawira, Y.M.A.
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An experience of ageing on XLPE insulation
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(Sciences and
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1
Weking, A.I.,
Kumara, I.N.S.,
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An experience of ageing on XLPE Insulation
Weking, A.I.,
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Sugiarta, I.N.
Show abstract | Related documents
http://www.scopus.com/authid/detail.uri?authorId=6507145301
1/2
2/16/2016
Scopus preview Scopus Author details (Giriantari, I. A D)
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2/2
ISBN : 978-1-4799-6125-2
Bali, 5 - 7 November 2014
ICSGTEIS 2014
Load Flow and Suplly Security Analysis of Power
System in Tiga Nusa;
Before and After the Application of 20kV Submarine Cable
IW. Sukerayasa, IAD. Giriantari, YMA. Prawira
Department of Electrical Engineering
Udayana University, Bali, Indonesia
sukerayasawayan@yahoo.com, dayu.giriantari@unud.ac.id
Abstract— Tiga Nusa is a region consist of three small islands:
Nusa Penida, Nusa Lembongan, and Nusa Ceningan, that located
southeast of Bali Island. Those three small islands have many
magnificent diving sports that are famous among divers all over
the world. Therefore, this region becomes one of tourist
attraction initiate rapid development. Energy demand in this
region is increasing significantly. The power supply of this region
is isolated from Bali Island. The utility company is trying to get
supply from Bali Island by connecting this region through 20kV
submarine cable. This paper presents the load flow analysis and
supply security analysis of the Tiga Nusa system before and after
the submarine cables operated.
submarine makes some changes to the load flow of the power
system. This study discusses the load flow and supply security
before and after the application of submarine cable. This paper
also shows the difference of the application of 1 and 2
submarine cables.
Software is utilized for this study. Firstly, single line
diagram of the system is drawn as seen on Fig. 1, then the load
flow is calsulated.
Load flow analysis has found that power loss increase when
submarine cable operates. Voltage drop is not significantly
improved but it moved from Nusa Lembongan to Nusa Penida.
However the supply security is until year 2033 if 2 submarine
cables operate.
Keywords—Tiga Nusa; energy demand; submarine cable;
power loss; supply security
I. INTRODUCTION
Tiga Nusa region has total area 20,284 km2consist of three
small island; Nusa Penida, Nusa Lembongan, and Nusa
Ceningan[1]. The distribution power system of this region was
isolated to Bali island This region was supplied by diesel
generators, PV Solar System, and wind generation. The
availability capacity of power generation was 4,866 kW and it
peak demand was 2,492 kW[2]. The three islands are famous of
their magnificent diving sports which initiate rapid
development in this region. Energy demand in this region is
increasing significantly due to the rapid development of tourist
facilities.
II. RESULT AND DISCUSSION
A. Load Flow Analysis
Software is utilized for load flow analysis in order to find
the power loss and voltage drop due to new supply from
submarine cables. The capacity of each submarine cable is
13MW. The result of the power loss before submarine cables
were applied is shown in Fig.1. It found that network losses is
0.046 MW and the total generation is 1,785 MW, therefore the
power loss is 2.57%.
In order to provide enough supply with low cost, the utility
company is trying to get supply from Bali Island by
connecting this region to Bali Island through 20kV Submarine
cable. There are 2 lines of XLPE 240mm2 submarine cables
laid connecting two points: GH Pering in Bali Island and GH
Jungut Batu at Nusa Lembongan. The application of
-28-
ISBN : 978-1-4799-6125-2
Bali, 5 - 7 November 2014
ICSGTEIS 2014
Power loss (%)
6
5
5.07
4
3.76
3
2
2.57
1
0
Fig. 1 Software report before application of submarine cable
Existing
Software report of the Tiga Nusa system for the application
of 2 submarine cables is shown in Fig.2. It shows that the
network losses is 0.068 MW and the total generation is 1,807
MW therefore the power loss is 3.76%.
2 Submarine Cables
1 Submarine Cable
Fig. 4. The power loss of 3 different supply
This study also found the voltage drop which initially
exhibited in Nusa Lembongan and Nusa Ceningan are
decreased when supply come from the submarine cables due to
the largest supply moved forward. In contrary, voltage drop in
Nusa Penida is increased because the largest supply moved to
other Island. Table I shows the voltage drop and its location for
existing system and when supply come from submarine cables.
TABLE I. VOLTAGE DROP AND ITS LOCATION
LOCATION
EXISTING
Fig. 2. Software report after application of 2 submarine cables
The software report the system if only 1 submarine cable is
applied is shown in Fig.3. It shows that the network losses is
0.093 MW and total generation in 1,832 MW therefore the
power loss is 5.07%.
VOLTAGE VOLTAGE VOLTAGE
RATING
BUS
DROP
Nusa Penida (NP0042)
20 kV
19.427
2.86%
Nusa Penida (NP0066)
20 kV
19.425
2.87%
N.Lembongan (JB0016)
20 kV
19.108
4.46%
N Lembongan (JB0003)
20 kV
19.089
4.55%
Nusa Penida (NP0042)
20 kV
19.326
3.37%
2 SUBMARINE Nusa Penida (NP0066)
CABLES
N.Lembongan (JB0016)
20 kV
19.324
3.38%
20 kV
19.723
1.39%
N.Lembongan (JB0003)
20 kV
19.768
2.47%
Nusa Penida (NP0042)
20 kV
19.059
4.71%
1 SUBMARINE Nusa Penida (NP0066)
CABLE
N.Lembongan (JB0016)
20 kV
19.057
4.72%
20 kV
19.462
2.69%
N.Lembongan (JB0003)
20 kV
19.507
2.47%
Energy loss is calculated based on load factor and loss
factor of the system. Load factor and loss factor are calculated
by using average peak load and average load, and it found that
the average load factor is 0.68 and average loss factor is 0.50.
The power loss existing is 45kW; with 2 submarine cable is
78kW; with 1 submarine cable is 105kW. Based on those
number energy loss is found increased significantly when
supply come from submarine cable. Energy loss existing is
201,480 kWh, if supply from 2 submarine cables energy loss is
297,840 kWh, and if only 1 submarine cable energy loss is
407,340 kWh. Fig. 5 shows the increased of energy loss.
Fig. 3. Software report if only 1 submarine cable is applied
Hence, we can see that power loss is increasing when there
is more supply from the submarine cables. The largest power
loss found if supply delivered by only1 submarine cable. Fig.4.
shows the different power loss of existing, when supply comes
from 2 submarine cables and when only 1 submarine cable.
-29-
ISBN : 978-1-4799-6125-2
Bali, 5 - 7 November 2014
Scenario 2 is the condition when 2 submarine cables
operated. It is found that large supply from Bali Island result in
large reserve power. The largest supply is from submarine
cable which has power 13 MW each. When one of this cable is
off there will be still enough supply to the system. Therefore
the supply system is secure until the year 2033. Table III shows
the detail of the scenario 2.
Energy loss
450,000
400,000
350,000
300,000
kWh
ICSGTEIS 2014
250,000
TABLE III. SUPPLY SECURITY FOR SCENARIO 2
200,000
150,000
YEAR
PEAK
LOAD
(MW)
1
2013
2.73
4.22
1.49
Secure
2014
3.00
17.22
14.22
Secure
2015
3.29
14.72
11.43
Secure
2016
3.61
14.72
11.11
Secure
B. Supply Security
2017
3.96
14.72
10.76
Secure
Supply security analysis is done in order to know the ability
to supply of the Tiga Nusa power system due to the increasing
demand by the year. The supply system consider secure if it
can maintain the continuity of supply to the load even the
largest supply is off which is known as N-1 method. Supply
system is secure when it has enough reserve power ± 30% of
total power.
2018
4.33
14.72
10.39
Secure
2019
4.73
14.72
9.99
Secure
2020
5.16
14.72
9.56
Secure
2021
5.61
14.72
9.11
Secure
2022
6.09
14.72
8.63
Secure
2023
6.60
14.72
8.12
Secure
2024
7.13
14.72
7.59
Secure
The study apply 3 scenarios: scenario 1 is existing
condition; scenario 2 is system with 2 submarine cables;
scenario 3 is system with only 1 submarine cable. The
submarine cables operate in 2014.
2025
7.69
14.72
7.03
Secure
2026
8.27
14.72
6.45
Secure
2027
8.89
14.72
5.83
Secure
2028
9.52
14.72
5.20
Secure
Existing condition, where the largest supply is from diesel
generator in Nusa Penida with its power is 1.480 MW. It is
obviously not secure when this generation is off. It is shown in
Table II.
2029
10.19
14.72
4.53
Secure
2030
10.88
14.72
3.84
Secure
2031
11.59
14.72
3.13
Secure
2032
12.34
14.72
2.38
Secure
2033
13.11
14.72
1.61
Secure
100,000
50,000
Existing
2 Submarine Cables
1 Submarine Cable
Fig. 5. Graph of energy loss
TABLE II. SUPPLY SECURITY OF SCENARIO 1
YEAR
PEAK
LOAD
(MW)
N-1
CONDITION
(MW)
RESERVE
POWER
(MW)
2013
1
2.73
2
1.72
(3)=(2)-(1)
-1.01
Not secure
2014
3.00
1.72
-1.28
Not secure
2015
3.29
0.24
-3.05
Not secure
2016
3.61
0.24
-3.37
Not secure
2017
3.96
0.24
-3.72
Not secure
2018
4.33
0.24
-4.09
Not secure
2019
4.73
0.24
-4.49
Not secure
2020
5.16
0.24
-4.92
Not secure
2021
5.61
0.24
-5.37
Not secure
2022
6.09
0.24
-5.85
Not secure
2023
6.60
0.24
-6.36
Not secure
2027
8.89
0.24
-8.65
Not secure
2028
9.52
0.24
-9.28
Not secure
2029
10.19
0.24
-9.95
Not secure
2030
10.88
0.24
-10.64
Not secure
2031
11.59
0.24
-11.35
Not secure
2032
12.34
0.24
-12.10
Not secure
2033
13.11
0.24
-12.87
Not secure
N-1
CONDITION
(MW)
2
RESERVE
POWER
(MW)
(3)=(2)-(1)
NOTE
The supply security of the Tiga Nusa system for scenario 3
which only 1 submarine cable is operated shows that will
secure until end of the year 2014. The largest supply is come
from the submarine cable, therefore when the only one
subamarine cable is off the system is supplied only from the
diesel genartor in Nusa Penida. Table IV shows the security of
the supply yearly.
NOTE
It is shown that there have to be 2 line submarine cables in
order to secure the supply to Tiga Nusa region. If there is a
problem in 1 line submarine cable, the system still get supply
from other line. The system will become more fragile if there is
only1 line supply to the region.
-30-
ISBN : 978-1-4799-6125-2
Bali, 5 - 7 November 2014
TABLE IV. SUPPLY SECURITY OF SCENARIO 3
YEAR
PEAK
LOAD
(MW)
1
N-1
CONDITION
(MW)
2
RESERVE
POWER
(MW)
(3)=(2)-(1)
NOTE
2013
2.73
4.22
1.49
Secure
2014
3.00
4.22
1.22
Secure
2015
3.29
1.72
-1.57
Not secure
2016
3.61
1.72
-1.89
Not secure
2017
3.96
1.72
-2.24
Not secure
2018
4.33
1.72
-2.61
Not secure
2019
4.73
1.72
-3.01
Not secure
2020
5.16
1.72
-3.44
Not secure
2021
5.61
1.72
-3.89
Not secure
2022
6.09
1.72
-4.37
Not secure
2023
6.60
1.72
-4.88
Not secure
2024
7.13
1.72
-5.41
Not secure
2025
7.69
1.72
-5.97
Not secure
2026
8.27
1.72
-6.55
Not secure
2027
8.89
1.72
-7.17
Not secure
2028
9.52
1.72
-7.80
Not secure
2029
10.19
1.72
-8.47
Not secure
2030
10.88
1.72
-9.16
Not secure
2031
11.59
1.72
-9.87
Not secure
2032
12.34
1.72
-10.62
Not secure
2033
13.11
1.72
-11.39
Not secure
ICSGTEIS 2014
III. CONCLUSION
The utilization of submarine cables to deliver power to the
Tiga Nusa region has caused a significant power loss and
energy loss to the system in the region. The supply security to
the region is much better until the year 2033 if 2 submarine
cables are utilized. In contrary, the supply security is drop in
the year 2014 if 1 submarines cable is utilized.
REFERENCES
[1] http://www.klungkungkab.go.id/index.php/profil/15/
Kondisi-Geografis, accessed on 19 Maret 2013
[2] PT. PLN (Persero) Area Bali Timur , Peak load Bali
Timur Feeder 2005-2012(Beban Puncak Penyulang Bali
Timur 2005 s.d. 2012 ). Klungkung:
[3] Daniel Rohi, dkk. Vol II, No.1 Juni 2008, Journal
EECCIS. Application of Load Flow for Energy Loss
Estimation in 20kV Radial Distribution system (Aplikasi
Pendekatan Aliran Daya untuk Estimasi Rugi Rugi
Energi Sistem Distribusi Radial 20 kV).
[4] Momoh,
James
A.
Electric
Power
Distribution,Automation, Protection, and Control. Taylor
and Francis Group, CRC Press. 2007: 44-45
[5] Fujikura Shanghai Cable LTD, The development of
20kV submarine cable interconnection system Bali-Nusa
Lembongan (Pembangunan Sistem Interkoneksi Kabel
Laut 20 KV Bali–Nusa Lembongan)
[6] PT. PLN (Persero) Area Bali Timur,, Power Generation
in Tiga Nusa Klungkung (Pembangkit Tiga Nusa.
Klungkung):. 2013.
-31-