• 제목/요약/키워드: Bus-Tie 적용

검색결과 7건 처리시간 0.026초

배전계통에 전력용 변압기 병렬운전시 22.9 kV SFCL Bus Tie 적용방안에 관한 연구 (A Study on the Application of SFCL on 22.9 kV Bus Tie for Parallel Operation of Power Main Transformers in a Power Distribution System)

  • 온민귀;김명후;김진석;유일경;임성훈;김재철
    • 전기학회논문지
    • /
    • 제60권1호
    • /
    • pp.20-25
    • /
    • 2011
  • This paper analyzed the application of Superconducting Fault Current Limiter (SFCL) on 22.9 [kV] bus tie in a power distribution system. Commonly, the parallel operations of power main transformers offer a lot of merits. However, when a fault occurs in the parallel operation of power main transformer, the fault currents might exceed the interruption capacity of existing protective devices. To resolve this problem, thus, the SFCL has been studied as the fascinating device. In case that, Particularly, the SFCL could be installed to parallel operation of various power main transformers in power distribution system of the Korea Electric Power Corporation (KEPCO) on 22.9 [kV] bus tie, the effect of the resistance of SFCL could reduce the increased fault currents and meet the interruption capacity of existing protective devices by them. Therefore, we analyzed the effect of application and proposed the proper impedance of the R-type SFCL on 22.9 [kV] bus tie in a power distribution system using PSCAD/EMTDC.

고장전류 저감을 위한 초전도 한류기 Bus-Tie 적용에 관한 검토 (Applying Superconduction Fault Current Limiter in the Bus-Tie Location)

  • 김종율;윤재영;이승렬
    • 한국초전도저온공학회:학술대회논문집
    • /
    • 한국초전도저온공학회 2003년도 추계학술대회 논문집
    • /
    • pp.197-200
    • /
    • 2003
  • As the power system is more complex and power demands increase, the fault currents have the tendency of increasing gradually. In the near future it will happen that the fault currents exceed circuit breaker rating for some substations. In this paper, the resistive SFCL (Superconducting Fault Current Limiter) is installed at Bus-Tie location to reduce the fault current in korea power systems and evaluated technical and economical Impacts.

  • PDF

실계통에서의 154kV HTS-FCL Bus-Tie 최적 적용방안에 관한 연구 (A Study on the Bus-Tie Application of 154kV HTS-FCL in Korean Power System)

  • 김종율;윤재영;이승열
    • 대한전기학회논문지:전력기술부문A
    • /
    • 제54권5호
    • /
    • pp.226-233
    • /
    • 2005
  • As the power demand has been increasing, a fault current problem is becoming more serious in real power system. Various ways like bus-split operation, transmission line open operation, are used in Korean power system for solving the problem. In this time, superconducting FCL(Fault Current Limiter) has been developed as a vary attractive alternative since HTS(High Temperature Superconductivity) was discovered. Korea, a project developing superconducting FCL to apply to 154kV transmission system is proceeding. Therefore, a power system analysis for SFCL application to power system is necessary, This paper presents the determination of quenching resistance and the selection of optimal cites when 154kV HTS-FCL is applied to Korean power system.

개선된 선로교환 기법을 이용한 방사상 전력계통의 최적 라우팅 알고리즘의 적용 (An Application of the Optimal Routing Algorithm for Radial Power System using Improved Branch Exchange Technique)

  • 김병섭;신중린;박종배
    • 대한전기학회논문지:전력기술부문A
    • /
    • 제51권6호
    • /
    • pp.302-310
    • /
    • 2002
  • This paper presents an application of a improved branch exchange (IBE) algorithm with a tie branch power (TBP) flow equation to solve the Optimal Routing problem for operation of a radial Power system including power distribution system. The main objective of the Optimal Routing problem usually is to minimize the network real power loss and to improve the voltage profile in the network. The new BE algorithm adopts newly designed methods which are composed by decision method of maximum loss reduction and new index of loss exchange in loop network Thus, the proposed algorithm in this paper can search the optimal topological structures of distribution feeders by changing the open/closed states of the sectionalizing and tie switches. The proposed algorithm has been evaluated with the practical IEEE 32, 69 bus test systems and KEPCO 148 bus test system to show favorable performance gained.

154 kV 초전도 한류기 모선연계 적용 연구 (Investigation of the Feasibility of a Bus-bar coupled SFCL in the 154 kV KEPCO Grid)

  • 윤용범;현옥배;황시돌;김혜림
    • 한국초전도저온공학회:학술대회논문집
    • /
    • 한국초전도저온공학회 2003년도 추계학술대회 논문집
    • /
    • pp.291-293
    • /
    • 2003
  • Applicability and economical feasibility of a Superconducting Fault Current Limiter (SFCL) have been investigated using the PSS/E simulation for a bus bar coupling at the real 154 ㎸ KEPCO power grid near Seoul. For the investigated substation, the maximum fault current exceeds the interruption rating of 4 circuit breakers (CB) out of 9 installed in the substation. The simulation showed that a SFCL installed in the bus tie position effectively limits the fault currents to save 4 CBs, which are to be replaced by ones of gloater interruption rating, otherwise. We suggest that the optimum resistance of the SFCL be 10 Ohm for the given grid.

  • PDF

국내 345kV 변전소 하위 154kV 계통 연계지점 SFCL 적용방안에 관한 연구 (A study on SFCL application for 154kV power system interconnection of 345kV S/S in Korean power system)

  • 이승렬;김종율;윤재영
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 2005년도 추계학술대회 논문집 전력기술부문
    • /
    • pp.340-343
    • /
    • 2005
  • This paper is for studying the feasibility of SFCL application for the interconnection operation of 154kV power systems under 345kV S/S in Korean power system. All Korean 154kV power systems are constructed as loop systems in downtown. However, the present 154kV systems are operated with separated systems around 345kV S/S because of fault current and overload problems. In this study, we investigate the structure and operation of 154kV power system in Seoul and study the feasibility of interconnection operation of 154kV systems under 345kV systmes by applying SFCLs to 154kV bus-tie.

  • PDF

국내 실계통에서의 154kV 초전도한류기 계통적용 가능성 검토 (Feasibility Study on the Application of 154kV HTS-FCL in Korean Power System)

  • 이승렬;김종율;최흥관;윤재영
    • 대한전기학회논문지:전력기술부문A
    • /
    • 제53권12호
    • /
    • pp.661-669
    • /
    • 2004
  • As the load density of KEPCO system is higher, the fault current can be much higher than SCC(Short Circuit Capacity) of circuit breaker. Fault current exceeding the rating of circuit breaker is a very serious problem in high density load area, which can threaten the stability of whole power system. Even though there are several alternatives to reduce fault current, as the superconductivity technology has been developed, the HTS-FCL (High Temperature Superconductivity Fault Current Limiter) can be one of the attractive alternatives to solve the fault current problem. This study presents the application plication of 154kV HTS-FCL in Korean power system.