Fault Location Method Based on Wide-Area Voltage

Abstract

Backup protection chain tripping caused by flow transferring is one of the most concerned issues in power system. The introduction of wide area backup protection is an effective way to solve the problem. However, in wide area protection system, an effective fault location puts forward a high demand for the location algorithm. This paper presented a method which combined effective mathematical methods with fault location calculation in power system together: firstly used fuzzy clustering analysis method for fast classification of voltage, locked the fault area, and prevented the occurrence of even jump accident at the first time. Then determined the fault location by calculating additional nodal current ratio in the fault area. The method avoids the repeated modification of network structure after fault. It lock the fault to the component quickly and improves the efficiency of fault location greatly.