Cooperative Fault Isolation Technology for Relay Protection and Distribution Automation

To improve the ability of fault handling in distribution networks, a coordinated fault isolation technique for relay protection and distribution automation was proposed. The configuration principles of relay protection and distribution automation co-processing distribution network faults is given, and the process of fault handling is analyzed. When the trunk line fails, the relay protection operates at the specified time, and then the distribution automation further optimizes and corrects it, so that the fault isolation is in the minimum range; the branch line fault relay protection can be completed, and the two do not affect each other. The static simulation system test shows that the co-operation fault isolation scheme of relay protection and distribution automation is feasible and isolates the fault area in the shortest time. Relay protection and distribution automation have significantly improved power supply reliability.