A Distance Relaying Algorithms Immune to Reactance Effect for Double-Circuit Transmission Line Systems

리액턴스 효과를 최소한 병행 2회선 송전선로 보호 거리계전 알고리즘

  • 안용진 (정회원, 유호전기공업(주) 주임연구원·공박) ;
  • 강상희 (정회원, 명지대 공대 전기공학과 부교수·공박) ;
  • 이승재 (정회원, 명지대 공대 전기공학과 교수·공박)
  • Published : 2001.01.01

Abstract

For double-circuit transmission line systems, an accurate digital distance relaying algorithm immune to the reactance effect is proposed. The apparent impedance calculated by the distance relay is influenced by the combined reactance effect of the fault resistance and the load current as well as the mutual coupling effect caused by the zero-sequence current of the adjacent parallel circuit. To compensate the magnitude and phase of the estimated impedance, this algorithm uses phase angle difference between the zero(positive) sequence of the both side of the system seperated by the fault point. The impedance measuring algorithm presented used a current distribution factor to compensate mutual coupling effect instead of the collected zero-sequence current of the adjacent parallel circuit.

Keywords

References

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