Intelligent approach to coordination identification in distancerelaying

摘要

Proper coordination of the protective relays is one of theimportant conditions for power system security. Settings of distancerelays usually determined by heuristic rules may not satisfy thecoordination requirements. In this paper, the coordination behaviour ofthe setting rules of the distance relays is investigated. Coordinationconditions and properties are derived and the coordination region isintroduced. Efficient algorithms to identify the coordination status arepresented together with its test results