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Design of SPS in the Korean Power System Against Faults on 765 KV Lines

Park Jong-Young    (Electric Power System & Economics Lab., Seoul National University   ); Park Jong-Keun    (Electric Power System & Economics Lab., Seoul National University   ); Jang Byung-Tae    (Korea Electric Power Research Institute  );
  • 초록

    In Korea, the protection systems against the instability of the nation's power system are insufficient in contrast with many other countries. In addition, there have just been studies carried out on detecting power system instability, while only a few studies pertaining to protection plans against instability exist. This paper focuses on systems to protect against the instability phenomena in the Korean power system. In this paper, we survey possible contingencies in the Korean power system and suggest outline and specs of the SPS (System Protection Scheme) against faults on the 765 kV line, based on simulations. It is concluded that event-based SPS for transient stability is appropriate for the Korean power system. In the simulations, the most severe contingency on the Korean power system is the fault on 765 kV transmission lines. If one of these lines is tripped by a fault, synchronism may be lost on the power plants near this line because of heavy power flow carried by them. In addition, undervoltage in the Metropolitan region is a serious problem in this case since this region receives about half its total power flow through these lines. In order to prevent a synchronism loss, some power plants have to be rejected according to the situations in the simulations.


  • 주제어

    event-based .   Korean power system .   SPS (System Protection Scheme) .   transient stability.  

  • 참고문헌 (5)

    1. D. Karlsson and X. Waymel, Eds., 'System protection schemes in power networks,' Rep., CIGRE Task Force 38.02.19, June 2001 
    2. M. Suzuki, K. Yanagihashi, eds., 'Development of an On-Line Stabilization Method for Local Power Systems with Large-Capacity Generation Plants,' IEEJ, Vol. 112, No. 1, pp. 39-51, 1992 
    3. KEPRI, A Study on the Assessment of the Dynamic Performance of the Korea Electric Power System and Its Enhancement, KPX, December 2002 
    4. Arthur. R. Bergen, Power Systems Analysis, Prentice- Hall, 1986, ISBN 0-13-687864-4 
    5. KERI, Development of Control and Protection System for Power Grid Stability Using Real Time Process, KEPRI, February 1998 

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  • 장병태 (6)

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