Research On Fault Intelligent Diagnosis System Of Medium And Large-scale Substation Grounding Grid

Substation grounding grid is of great importance for operation security of power system. Therefore,it is a significant research topic that rapid and accurate location on the degree and position of grounding grid fault of middle-large scale substation.The study on fault intelligence diagnosis of middle-large size substation grounding grid is conducted in this paper.And improved parameters identification method based on measuring potential value of grounding grid down lead is proposed.The middle-large scale substation grounding grid is modeled and simulated under MATLAB software.The overall design of intelligent fault diagnosis system is implemented.System framework,interface,practical function and application procedure are described in detail.In addition,measuring methods of grounding grid fault is accomplished in the field test.Test results show that the designed intelligent fault diagnosis system achieves desirable effect on diagnosing various faults of grounding grid of middle-large scale substation,and possess potential applicability in engineering projects.