A Novel Line Circuit Breaker Failure Protection Scheme Based on Substation Area Information

Abstract

The circuit breaker failure protection with compound voltage blocking has the problem of refusing to trip due to the insufficient sensitivity when a fault happens at the end of the long line. To solve this problem, this paper first analyzes the situation that traditional circuit breaker failure protection refuse to act, then the new line circuit breaker failure protection based on substation area information is put forward: calculating local protection criterion to get acting signal at substation area layer, redundant current information is used to judge whether there is current flow, and the voltage information of enclosure device is used to supplement the compound voltage blocking method of circuit breaker failure protection. Simulation results show that the new scheme of the circuit breaker failure protection based on substation area information sharing has higher reliability.