Simulation Analysis of the Arc Suppression Coil Grounding System Based on PSCAD

The simulation model of neutral point arc suppression coil grounding system is created in the PSCAD software,using the single-phase ground fault setting between two cables to simulate single-phase grounding fault caused by cable insulation damage.Through the simulation of neutral none-grounding system and the art suppression coil grounding systems,compare the grounding fault electric current and the load side voltage and current waveforms of fault line.By simulation to prove the obvious effect of reducing grounding fault current by arc suppression coil,reducing the amplitude of voltaic arc brought by grounding current,avoiding the unnecessary auto trip,improving the reliability of power supply,which brings assurance for coal mine safety production.