FAST TOPOLOGY DETECTION BASED ON OPEN LINE DETECTION RELAYS, A STRATEGIC FUNCTION IN POWER SYSTEM PROTECTION

摘要

In the present deregulated and market driven energy industry, modern power systems need to be operated closer to their design limits. Moreover, their topology is becoming more complex due to additional interconnection links. Efficient defense plans are therefore more important than ever to provide fast, secure and reliable means of protecting these systems against their own contingencies or those experienced by their neighbours. System topology monitoring is a strategic function to consider in the design of defense plans. Hydro-Quebec transmission system is making extensive use of open line detectors to monitor system topology for the purpose of its most strategic SPS (Special Protection Schemes). A new version of these detectors, called DLO, have been recently developed. The main characteristics and performances of these new DLO as well as their application on Hydro-Quebec transmission system are presented in this paper.