The Grey Theory of Application in the Resonance Grounding Fault Detection
Baosheng Chen · Electrical Measurement & Instrumentation · 2012
Grey target theory is a new prediction method in recent years.This method is firstly used in the fault detection in the paper.This method is used to analyze the one-phase ground fault transient and steady state from the signal characteristics and further improve the transient and steady state information based on the small current ground fault line criterion.According to the simulation data can know that the zero sequence of the fault line current bigger than the sound lines,and in the time of the nearby fault opposite polarity.So we will select each line at the same time the zero sequence current maximum as target,so as to establish the standard model.Firstly,This paper is mainly to decide the standard model.Secondly,it will be the calculation of each circuit's target results.Then we will get each fault line which is the probability of size.