Low-current grounding fault line selection method based on power grid dispatching control system

The invention discloses a low-current grounding fault line selection method based on a power grid dispatching control system. The low-current grounding fault line selection method is characterized inthat: when the intelligent power grid dispatching control system monitors that a bus is suspicious in grounding, a low-current grounding fault line selection auxiliary decision-making function is activated; and line selection results of multiple dimensions such as a zero-sequence current amplitude method, a zero-sequence current sudden change method, a reactive sudden change method and an IQ comprehensive method are organically fused according to different grounding modes and arc suppression coil compensation modes, thereby providing an intelligent auxiliary decision for single-phase groundingfault trial line selection. According to the method, hardware facilities do not need to be additionally arranged, the method is not influenced by a system grounding mode and an arc suppression coil compensation mode, rapid id