[email protected]Status and Future Direction of HTS Power Application in KEPCO K. W. Jeong, B. S. Moon, S. K. Park Grid Planning Office, KEPCO Korea SUMMARY KEPCO is pushing variety efforts to lead green technologies and increase energy efficiency through smart grid. Superconductor technologies are at the center of them. KEPCO is focusing on high temperature superconducting (HTS) cables that enable high-capacity transmission and superconducting fault current limiters (SFCL) that control fault current effectively when faults occur. KEPCO is planning to verify that AC 22.9kV, 50MV, 500m HTS cable and 22.9 630A SFCL in Icheon substation by 2011. Also DC 80kV HTS cable and AC 154kV HTS cable are expected to demonstrate until 2014. In this paper, background of these projects, information and effects will be described. KEYWORDS High Temperature Superconducting Cable (HTS Cable); Fault Current Limiter; HVDC.”. Oct.26-28, 2011, Thailand PL-18 CIGRE-AORC 2011 www.cigre-aorc.com
Status and Future Direction of HTS Power Application in KEPCO
K. W. Jeong, B. S. Moon, S. K. Park
Grid Planning Office, KEPCO Korea
SUMMARY KEPCO is pushing variety efforts to lead green technologies and increase energy efficiency through smart grid. Superconductor technologies are at the center of them. KEPCO is focusing on high temperature superconducting (HTS) cables that enable high-capacity transmission and superconducting fault current limiters (SFCL) that control fault current effectively when faults occur. KEPCO is planning to verify that AC 22.9kV, 50MV, 500m HTS cable and 22.9 630A SFCL in Icheon substation by 2011. Also DC 80kV HTS cable and AC 154kV HTS cable are expected to demonstrate until 2014. In this paper, background of these projects, information and effects will be described. KEYWORDS High Temperature Superconducting Cable (HTS Cable); Fault Current Limiter; HVDC.”.
Environmental problems such as sustained rise in oil prices, fossil fuel depletion and global warming
have emerged as a big issue to the power industry [1]. Thus, Korea Electric Power Corporation
(KEPCO) is looking for new solutions about green growth policy and slowdown in profitability due to
the reduction of domestic demand. As a solution, KEPCO declared new management vision that
“Global Top 5 Utility for Green Energy". And low-carbon generation technologies, high-efficiency
power transmission technologies and new demand creation were selected as a strategic project. In this
category, including superconducting technology, HVDC, 8 technologies were chosen as green growth
power technologies [2].
Superconducting technology makes power facilities economic operation possible. Costly civil
construction cost, difficulty using road for electric pipelines construction, NIMBY phenomenon, need
to replace the aging old cable and increase of fault current due to growing load have been an issue in
KEPCO. Superconducting technology is emerging as a solution for those issues. Superconducting
technology enables the miniaturization of the equipment and operates with high efficiency, reduce
carbon emissions, save on the high construction cost. And also it is an eco-tech that solves the NIMBY
phenomenon. KEPCO is developing these superconducting technologies with DAPAS project, GENI
project, test of transmission class superconducting devices and Gochang power test center. In this
paper, the current status, plans for the future and expectations of superconductor technologies will be
described.
2. DAPAS project
DAPAS is an abbreviation of Development of Advance Power system by Applied
Superconductivity technologies Program. And it aimed to develop HTS power equipments
using superconducting wires from 2001 to 2011. One of result of DAPAS project is
developing world-class HTS wire manufacturing technology. HTS wires can be manufactured
with less than half price and twice faster than before. Also the world top class low-voltage
level high-capacity HTS cable was developed. It is 22.9kV 50MVA and it can send electrical
energy 15 times more than conventional cable. Core technology of 22.9kV 150MVA high-
capacity HTS cable to replace the conventional 154kV cable and design, manufacturing
technology of 154kV 1GVA HTS cable that has same capacity of 345kV or higher
conventional cable are also developed. The world top class 22.9kV 3kA SFCL was developed
and core components of 154kV 4kA SFCL have been developed which can apply to 154kV
power system. In addition, core components of 5MW superconductor motor were developed.
It is one-third volume and weight of conventional motor with 2% higher efficient.
3. GENI project
GENI is an abbreviation of Green superconducting Electric power Network at Icheon
substation. This project is installing 22.9kV HTS cable and SFCL in 154kV Icheon substation
to develop commercialized model of HTS equipment and operating techniques.
The HTS cable is connected to the secondary side of the main transformer in service. The
cable system operates at the distribution class voltage of 22.9 kV and the rated current is 1250
A. The cable is composed of three phase in a cryostat, a joint box, and two terminations. The
whole length of between terminations including a joint-box is approximately 500m. The
cooling system for the cable uses sub-cooled liquid nitrogen (LN2) as a coolant [3].
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Fig. 1. Layout of HTS cable and SFCL in 154kV Icheon S/S
SFCL is connected to the 22.9kV Jangpyung D/L. It operates at 22.9 kV and the rated
current is 630A at around 76K. SFCL is hybrid type using superconductor and fast switch.
Now 100m HTS cable with transmission class voltage of 154kV and the capacity of 1GVA
is testing in Gochang power test center and it is expected to demonstrate in KEPCO power
system until 2014.
4. Study on transmission class HTS application
Study on transmission class HTS application is based on GENI project and it is to expand
transmission class HTS application to KEPCO power system. KEPCO is aiming to
commercialize transmission class HTS cables and SFCL. Development, production,
installation, operation of DC 80 kV HTS cable and AC 154 kV HTS cable will be performed.
Developing AC 154kV HTS cable is completed and it is on testing at Gochang Power Test
Center. And also it will demonstrate at Guem-ahk C/S in Jeju Island by 2014. In case of DC
80kV HTS cable, core technology of cable will be developed in a year from July 2011.
Installation and demonstration will be progressed in Hanlim HVDC test bed by 2013. Tres
Amigas Super Station project will carry forward with DC 80kV HTS cable.
Fig. 2. Layout of Hanlim HVDC test bed
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5. Introduction of Gochang Power Test Center
Gochang Power Test Center is portal test site of KEPCO in power technologies. New
technologies in the fields of electric power and research and development outputs have been
conducting experiments for the demonstration. HTS cable systems laboratory and various
latest test equipments are available in test yard for underground cable which was complete in
June of 2010.
Fig. 3. Test yard for underground cable(left) and 154kV, 1GVA, 30m HTS cable system(right)
Main facilities of test yard are 100m length of 22.9kV, 50MVA HTS cable system, HTS
application testing laboratory, HTS cooling system room and various equipment. Now 154kV
1GVA HTS cable is on testing.
6. Tres Amigas Super Station Project
Fig. 4. Tres Amigas Super Station Concept
Tres Amigas Super Station (TASS) project is connecting three different power systems in
USA using HVDC inverters, energy storage, and HTS cables. These connections will be made
profits through electric power exchange, renewable energy connection and so on. On
February 2010 a consortium for TASS project has formed with LS cable. According to the
consortium, KEPCO is charge in engineering part such as HTS cable testing. And LS Cable
takes charge of manufacturing and installation part. American Superconductor (AMSC),
which has been delegated the superconducting cables technical evaluation from Tres Amigas
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LLC, was signed awards with KEPCO as a qualified superconducting cable provider. This
project is currently under negotiation.
7. Plans and expectations
KEPCO will secure the world's leading technology with the world first DC 80kV HTS cable
by 2013 and AC 154kV HTS cable. At the field of SFCL, after finishing the demonstration
the 22.9kV hybrid fault current limiter in Icheon S/S, the world top technology will be
secured with 154kV, 4kA SFCL. Final aim is developing 345kV SFCL. The world top
technology of HTS application will make short-range metro-centric grid environmentally
friendly, high efficiency of power transmission and better power quality. Also, when entering
overseas HTS project, we can provide HTS applications and engineering technology as a
package with manufacturers.
8. Conclusion
KEPCO has been preceding many projects to develop HTS technology. Starting with
DAPAS project, superconducting wires, cable, fault current limiter, motor and more products
have been developed. Through GENI project, HTS cables and SFCL are installed and
operated in Icheon substation. To develop transmission class of HTS cable, AC 154kV and
DC 80kV HTS cables are plan to design and manufacturing. And 154kV 1 GVA HTS cable is
on testing in Gochang Power Test Center. These cables will be demonstrated in Jeju Island.
This continued R&D will enable KEPCO secure the world’s leading HTS application
technology. KEPCO is expecting that HTS application technology will make KEPCO
advance the leading overseas markets for new revenue-generating, set the HTS technology
standard to take the technology leadership, contribute to green growth by building Eco-
friendly grid with high power quality, and reduce power costs.
BIBLIOGRAPHY [1] Lee, S. Y., "HTS application demonstration project and commercialization", in Efficiency Speed
Environment, No. 17, pp. 28-29 (2010)
[2] Won, Y. J., "8 Green Technologies of KEPCO and Superconductor", in Efficiency Speed
Environment, No. 16, pp. 20-21 (2010)
[3] Sohn, S. H., Lim, J. H., Yang, B. M., Lee, S. K., Jang, H. M., Kim, Y. H., Yang, H. S., Kim, D.
L., Kim, H. R., Won, Y. J., Hwang, S. D., “Design and Development of 500 m Long HTS Cable
System in the KEPCO Power Grid,” in Physica C superconductivity, Vol. 470, Issue 20, pp.
1567-1571 (2010).
Short Bio-data of Main Author
Kyuwon Jeong. He Received the B. S., M. S., and Ph. D. degrees in electrical
Engineering from SungKyunKwan University, Seoul, Korea, in 1993, 1995 and
2001, respectively. He is currently a Senior Manager in a Grid Planning Office at
Korea Electric Power Company (KEPCO) Seoul, Korea, His interests include High
Temperature Superconductor (HTS) facilities development and application & East-
Asian grid inter-connection.
K. W. Jeong, B. S. Moon, S. K. Park
Grid Planning Office, KEPCO
Korea
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Contents
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1. Introduction
Why Superconductor ? Solution for environmental problems
Maldives’ cabinet underwater meeting(‘09.10)
4
Decrease energy dependence and enhance energy self-sufficiency
Support adaptation to climate change impacts
Develop green technologies as future growth engines
Greening of industry
Develop cutting-edge industries
Set up policy infrastructure for green growth
Green city and green transport
Green revolution in lifestyle
Reduce carbon emissions
Country Enhance global cooperation on green growth
10 policy directions
1. Introduction
Korean Government’s Policy of Green growth
1
2
3
4
5
6
7
8
9
10
Field of KEPCO’s main role
5
1. Introduction
KEPCO’s solutions for Environmental problems. Global Top 5 Energy &
Engineering Company
8 Green Technologies IGCC
CCS
Nuclear Power Generation
Smart grid
Superconductor
HVDC
Electric Vehicle
Electrical Energy House
6
HTS Technology in KEPCO
Large Capacity & Low loss + Eco-friendly
HTS applications
7
2. DAPAS Project
DAPAS : Development of Advanced Power System by Applied Superconductivity technologies
Develop HTS Power equipments using superconductor wires(KEPCO, KERI, LS cable, SeoNam etc.)
Project period : 2004 ~ 2011
HTS
Cable
FCL
2G
Wire
- The World top class manufacturing technology- manufactured with half price less and twice faster
- 22.9kV 50MVA, send electrical energy 15 times more than conventional cable. - Core technology of 22.9kV 150MVA, 154kV 1GVA HTS cable are developed
Motor
- The world top class 22.9kV 3kA SFCL was developed.- Also core components of 154kV 4kA SFCL were developed.
- Core components of 5MW superconductor motor were developed.- One-third volume and weight of conventional motor with 2% higher efficient
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3. GENI Project
GENI : Green Superconducting Electric Power Network at Icheon S/S
Installing 22.9kV HTS cable and SFCL in Icheon substation to develop commercialized model of HTS equipment and operating techniques. (KEPCO, LS cable, KERI etc.)
Project period : 2008 ~ present & Planning 2nd stage
HTS
Cable
SFCL
- 22.9 kV, 50MVA, 1250 A, 500m @ 2nd side of #5M.Tr.- 3 phase in a cryostat, a joint box, and two terminations. - Sub cooled liquid nitrogen (LN2)
- 22.9kV 630A, SFCL @ Jangpyung D/L.- hybrid type : superconductor + fast switch.
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Layout of HTS cable and SFCL in Icheon S/S
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4. Transmission class HTS applications
New project of HTS application in KEPCO grid.Development, production, installation, HTS cables and SFCL(KEPCO,
KEPRI, LS Cable etc.)
Project period : 2011.7 ~ 2016.6
Total budget : \75.4 bil ($68 mil)
Tres Amigas Super Station project will carry forward with DC 80kV HTS cable
HTS
Cable
SFCL
- DC 80kV HTS cable, 500m(2013)- AC 154kV HTS cable, 1km(2014)- Guem-ahk C/S in Jeju Island
- AC 154kV 4000A
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Direction for new project
+
Expanding Base
Collaboration (Industry-Academy-R&D)
Domestic (wire, cooling systems)
Longer cable (Cooling system development)
Required Technologies
EconomicReliabilities
Downsizing (Cryogenic Insulation development)
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Layout of Hanlim test bed
HanlimC/C
Hanlim
154kV West Jeju- Hanlim T/L
154kVACHTS(~1km,2014)
#2HVDC(2011)
(250kV,400MW)
DC OverHead(ACCC/TW) (±80kV,~5km,2011)
Anduk
W. Jeju
MainlandNewTownin Jeju
154kV Hanlim-Anduk T/LDCHTS(~0.5km,2013)
GumAk C/S(80kV,60MW)
154kV West Jeju –Anduk T/L
: AC: DC: HTS
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5. Gochang Power Test Center
Portal test site of KEPCO in power technologies
Test yard for Underground Cable(2010) : HTS cable systems laboratory, various test equipments
Test Yard for Underground Cable 154kV, 1GVA, 30m HTS cable system
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6. Tres Amigas Super Station Project
Tres Amigas Super Station(TASS) Connecting 3 different power system
Using HVDC inverters, energy storage, and HTS cables
KEPCO, LS cable formed a consortium(2010) KEPCO : Engineering
LS Cable : manufacturing and installation
TASS project is under negotiation
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7. Plans and expectations
Short-range metro-centric grid environmentally friendly, high efficiency of power transmission better power quality.
Entering overseas HTS project Package of HTS applications and engineering technology
with manufacturers
’09 ’10 ’11 ’12 ’13 ’14 ’15 future
HTSApplications
22.9kV HTSC154kV HTSC
345kV SFCL154kV SFCL22.9kV SFCL
DC 80kV HTSC
Longer HTSC(above 3km)
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8. Conclusion
Since KEPCO had selected ‘8 Green Technologies’, HTS applications are
developed through many projects.
In DAPAS project, superconducting wires, HTS cable, SFCL, motor and more
products have been developed.
Through GENI project, 22.9kV HTS cables and SFCL are installed and operated
in Icheon substation.
To develop transmission class of HTS cable, AC 154kV and DC 80kV HTS cables
are plan to design and manufacturing. These cables will be demonstrated in Jeju
Island by 2014. And 154kV 1 GVA HTS cable is on testing in Gochang Power
Test Center.
HTS application technology will make KEPCO advance the leading overseas
markets for new revenue-generating, set the HTS technology standard to take
the technology leadership, contribute to green growth by building Eco-friendly
grid with high power quality, and reduce power costs.
