Status and Future Direction of HTS Power Application in KEPCO
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1 Oct.26-28, 2011, Thailand PL-18 CIGRE-AORC 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 A SFCL in Icheon substation by Also DC 80kV HTS cable and AC 154kV HTS cable are expected to demonstrate until In this paper, background of these projects, information and effects will be described. KEYWORDS High Temperature Superconducting Cable (HTS Cable); Fault Current Limiter; HVDC..
2 1. Introduction 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 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 highcapacity 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 (LN 2 ) as a coolant [3]. 2
3 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 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 In case of DC 80kV HTS cable, core technology of cable will be developed in a year from July Installation and demonstration will be progressed in Hanlim HVDC test bed by Tres Amigas Super Station project will carry forward with DC 80kV HTS cable. Fig. 2. Layout of Hanlim HVDC test bed 3
4 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 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 4
5 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 Ecofriendly 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 (2010) [2] Won, Y. J., "8 Green Technologies of KEPCO and Superconductor", in Efficiency Speed Environment, No. 16, pp (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 (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. 5
6 K. W. Jeong, B. S. Moon, S. K. Park Grid Planning Office, KEPCO Korea
7 Contents 2
8 1. Introduction Why Superconductor? Solution for environmental problems Maldives cabinet underwater meeting( 09.10) 3
9 1. Introduction Korean Government s Policy of Green growth 10 policy directions Reduce carbon emissions 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 Country Enhance global cooperation on green growth Field of KEPCO s main role 4
10 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 5
11 HTS Technology in KEPCO Large Capacity & Low loss + Eco-friendly HTS applications 6
12 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 kV 50MVA, send electrical energy 15 times more than conventional cable. - Core technology of 22.9kV 150MVA, 154kV 1GVA HTS cable are developed FCL - The world top class 22.9kV 3kA SFCL was developed. - Also core components of 154kV 4kA SFCL were developed. 2G Wire - The World top class manufacturing technology - manufactured with half price less and twice faster Motor - Core components of 5MW superconductor motor were developed. - One-third volume and weight of conventional motor with 2% higher efficient 7
13 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 2 nd stage HTS Cable kv, 50MVA, 1250 A, 2 nd side of #5M.Tr. - 3 phase in a cryostat, a joint box, and two terminations. - Sub cooled liquid nitrogen (LN 2 ) SFCL kV 630A, Jangpyung D/L. - hybrid type : superconductor + fast switch. 8
14 Layout of HTS cable and SFCL in Icheon S/S 9
15 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 : ~ Total budget : \75.4 bil ($68 mil) HTS Cable - DC 80kV HTS cable, 500m(2013) - AC 154kV HTS cable, 1km(2014) - Guem-ahk C/S in Jeju Island SFCL - AC 154kV 4000A Tres Amigas Super Station project will carry forward with DC 80kV HTS cable 10
16 Direction for new project Reliabilities Economic Required Technologies Expanding Base Longer cable (Cooling system development) Downsizing (Cryogenic Insulation development) + Collaboration (Industry-Academy-R&D) Domestic (wire, cooling systems) 11
17 Layout of Hanlim test bed #2HVDC(2011) (250kV,400MW) Mainland W. Jeju New Town in Jeju Hanlim C/C 154kV West Jeju- Hanlim T/L 154kV West Jeju Anduk T/L DC Over Head (ACCC/TW) (±80kV, ~5km, 2011) DC HTS (~0.5km, 2013) 154kV Hanlim-Anduk T/L 154kV AC HTS (~1km, 2014) Hanlim GumAk C/S (80kV,60MW) : AC : DC : HTS Anduk 12
18 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 kV, 1GVA, 30m HTS cable system
19 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 14
20 7. Plans and expectations future HTS Applications 22.9kV HTSC 154kV HTSC DC 80kV HTSC Longer HTSC (above 3km) 22.9kV SFCL 154kV SFCL 345kV SFCL 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 15
21 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 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. 16
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