Ground Fault Detection by Utilizing Multiple Characteristic Variables
At present,most of the studies on distributing network ground fault detection focus on one certain characteris-tic variable,and thus are limited to some extent.In order to accurately distinguish various kinds of ground faults,this pa-per proposes four feature extraction methods for fault phase voltage transient component,fault phase current transient DC component,fault point transition resistance,and fault ignition arc property.It analyzes the fault detection function of the corresponding characteristic variables,and proposes a ground fault detection method based on the multiple characteristic variables.MATLAB simulation verifies the feasibility of the proposed method.