Directional Relay for Outlet Ground Faults Based on Zero Sequence Voltage Comparison
摘要
The traditional phase-based protection applied to the new energy access system has some adaptation problems, while the R-L model-based time domain differential equation algorithm has the problem of “voltage dead zone.” Based on this, a directional relay based on zero-sequence voltage comparison is proposed for line outlet ground fault. The relay can distinguish the fault direction of the outlet ground fault by comparing the trend of the measured value of the zero sequence voltage with the calculated value, and the simulation analysis shows the effectiveness of this relay.