This paper applies distributed generator (DG) self-organized network technology to solve the issue of microgrid service restoration. When a microgrid is switched from grid-connected mode to unplanned islanded mode

it is orderly split into a number of DG local self-organized networks that can operate independently in order to supply power to critical loads or local loads continuously. After each of them operates stably

the maximization of external power supply restoration is achieved using climbing hill strategy based on heuristic optimization algorithm in terms of the capacity of DGs for external search and expansion of power supply range. On the basis

the DG dynamic self-organized networks with capable of interconnection are connected in turns to enhance the stability of the system. After the public distribution network is restored to normal

each DG dynamic self-organized network is connected to the public distribution network in succession according to their topologies. Simulation and verification of the effectiveness of the proposed method are performed taking Siemens’ Benchmark 0.4 kV low-voltage microgrid as an example. This work is supported by National Basic Research Program of China (973 Program) (No. 2013CB228205).