Research Of The Methods Of Fault Line Selection In Resonant Grounded System

Fault selection for the non-effective-earthed system is a long-standing problem inthe operation of ineffectively grounded distribution systems. But the spot records showthat the effect is disappointing by some factors of disturbance. The paper research theeffect of three-phase unbalance by unbalance of earthed capacitor, Analyze how toeffect fault selection and propose a method to resolve this problem. On the otherhand ,propose a new fault selection method, the main idea is correlation analysis.Before correlation analysis we take two disposition. One is disposing the current,another is filtering by morphology.The method is tested by lab test and data analysisfrom locale, the method is effect and feasible.