Measurement of Capacitance Current of Neutral Point Non - grounding System

The fault of medium and low voltage distribution network is mostly single-phase grounding fault. This kind of system is often run by neutral ungrounded system. When the capacitance current is too large, it is easy to produce arc light overvoltage, which leads to the further expansion of fault. At present, Direct measurement, estimation and PT triangulation are used to measure the capacitance current, but the test process is complicated and the results are not accurate. This paper introduces the capacitance current measurement method based on the neutral point of the capacitor. Compared with the traditional method, this method is more simple and accurate.