The invention discloses a grounding fault
current compensation system and method for a self-generated power supply phase power supply. The grounding fault
current compensation system comprises a phasepower supply converter, a fling-
cut switch, a
voltage transformation device and a controller, wherein the input end of the phase power supply converter is connected with a
bus, the output end of thephase power supply converter is connected with the input end of the fling-
cut switch, the
voltage transformation device is connected between the phase power supply converter and a
system neutral pointin series, the controller is connected with a
voltage transformer of the
bus, and the output end of the controller is connected with the input end of the fling-
cut switch. The system can passively generate a power distribution network power supply phase power supply and a
harmonic phase power supply, and the reversed-phase power supply phase power supply and the
harmonic phase power supply are put into the system according to fault logic, so that complete compensation of reactive current and
harmonic current of the grounding fault of the power distribution network is achieved, the defect thatthe compensation is incomplete by adopting a power electronic device inversion injection method after
electricity is taken from a
bus system is overcome, and the problems that an active inversion method is poor in metallic grounding
compensation effect and a traditional
arc suppression coil cannot achieve full compensation are solved.