대한전기학회논문지:전력기술부문A (The Transactions of the Korean Institute of Electrical Engineers A)

대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

과도성분과 상태도를 이용한 거리 계전기의 향상된 Zone 3 알고리즘

An Enhanced Zone 3 Algorithm of a Distance Relay using Transient Components and State Diagram

  • 허정용 (성균관대 공대 정보통신공학부) ;
  • 김철환 (성균관대 공대 정보통신공학부)
  • 발행 : 2004.03.01
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초록

Zone 3 of the distance relay is used to provide the remote back-up protection in case of the failure of the primary protection. However, the risk lot mal-operations under stressed conditions such as heavy loading, voltage and transient instability is usually high. Zone 3 is used in combination with the derivatives of the voltage, and current, etc to prevent mal-operations. Sometimes, the impedance characteristics that restrict the tripping area of relay are used to avoid the mal-operations due to load encroachment. This paper presents a novel Zone 3 scheme based on combining the steady-state components (i.e. 60Hz) and the transient components (TCs) using a state diagram that visualizes the sequence of studies that emanate from the sequence of events. The simulation results show that the novel zone 3 distance relay elements using the proposed method operates correctly for the various events.

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참고문헌

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