Project supported by the National Natural Science Foundation of China(51737002),the Research and Innovation Project for Graduate Students of Hunan Province(CX2017B480) and the Science and Technology Project of State Grid Corporation of China(52170217000S).
In order to solve the problems that the traditional arc suppression coil cannot compensate the active current nor suppress the intermittent-arc grounding fault, a novel method of full compensation for grounding fault of resonant grounding system is proposed. In the normal state of resonant grounding system, the values of compensation components are calculated based on the system insulation parameters precisely measured by injecting signal resonance. When single-phase grounding fault occurs, the fault phase is selected by the phase of the fault ...