A microgrid is a small-scale power system that can flexibly accommodate high penetration and utilization of renewable energy generation

and operate with a high efficiency as well as act as a stand-alone island. With the ever-increasing capacity of a microgrid with high penetration of renewable energy generation

the feasibility of the microgrid acting as a black-start power source has been more and more widely recognized. The optimization problem of power network reconfiguration is studied

in which the microgrid acts as a black-start power source. The advantages and feasibility of the microgrid with high penetration of renewable energy generation acting as black-start power source are first presented. Then

maximization of the energy capability of the restoration system and the minimization of the load losses of the inner microgrid are formulated as the objectives of the reconfiguration model. The restoration paths of the units to be restored are optimized with respect to a path evaluation index that integrates the node importance and the recovery time of restoration paths. Finally

the New England 10-generator 39-bus power system is employed to illustrate the feasibility and validity of the proposed method.