Micro grid rapid grid connection method based on three-phase independent regulation

The invention provides a micro grid rapid grid connection method based on three-phase independent regulation. The method comprises the following steps: (1) a grid connection protection controller of a micro grid and a distribution network sends the collected three-phase voltage value of a distribution network side and the state signal of a grid connection circuit breaker to a master power supply controller of a micro grid side, (2) the master power supply controller uses a PI control algorithm to respectively adjust the active power, reactive power and phase parameter of each phase of the micro grid side, (3) the master power supply controller carries out real-time comparison of the voltage parameters of the distribution network side and the micro grid side, and if the comparison result satisfies the synchronous closing judgment condition of a power grid, a closing command is sent to the grid connection circuit breaker. Compared with the prior art, according to the micro grid rapid grid connection method based on the three-phase independent regulation, through the rapid regulation of the master power supply controller, the three-phase voltage amplitude, frequency and phase position of the distribution network side and the micro grid side satisfy the condition of synchronous grid connection, and the reliable and stable connection of the micro grid into a large power grid is ensured.