Self-adaption intelligent protection method for power distribution network applied to high-permeability distributed power supply

The invention provides a self-adaption intelligent protection method for a power distribution network applied to a high-permeability distributed power supply. The power distribution network comprises a primary circuit, an optical fiber network, a wireless network, intelligent terminals and the distributed power supply. The protection process of the self-adaption intelligent protection method includes the region dividing step, the fault detection step, the instant fault judgment step and the network reconstruction step. When faults happen to the power distribution network, fault region positioning and isolating and instant fault processing can be completed through cooperation between the intelligent terminals in all regions under the grid-connected operation condition of the distributed power supply. When the faults are judged to be permanent faults, each intelligent terminal uploads fault information to a power distribution network main station, the main station conducts calculation through the information to