Ground fault removal device, system and method

The invention relates to the technical field of power distribution network ground protection, in particular to a ground fault removal device, system and method, and the device comprises a ground transformer protection module, a line selection module and feeder protection modules. Each feeder protection module is connected with the line selection module and is used for sending a first protection starting signal to the line selection module when a high-resistance grounding fault is detected; the grounding transformer protection module is connected with the line selection module and is used for sending a second protection starting signal to the line selection module when a high-resistance grounding fault is detected; and the line selection module is used for sending a tripping command to the feeder protection module corresponding to the first protection starting signal when the first protection starting signal and the second protection starting signal are received, so that the technical problem that a faulty lin