Adaptive grounding protection device based on zero sequence voltage

The invention relates to the field of power line protection, and particularly relates to an adaptive grounding protection device based on zero-sequence voltage. Theadaptive grounding protection device comprises a zero-sequence voltage sensor, a current sensor, a key module, a power supply module, a microprocessor module, a display screen module, an RS485/RS232/network communication interface module, a storage module, a remote signaling input interface and a control output interface, wherein the output ends of the zero-sequence voltage sensor and the current sensor are connected with the AD input end of the microprocessor module; the output end of the key module is connected with the input end I/O of the microprocessor module; the output end of the power module is connected with the power port of the microprocessor module; the input end of the display screen module is connected with the output end I/O of the microprocessor module; and the input end of the RS485/RS232/network communication interface module is c