Coordinated Restoration of Generators and Load for the High Renewable Energy Penetrated Power System with Frequency Regulation

The frequency dynamic of converter-based renewable energy generators is much different from the traditional inertia-based generators in the restoration process of the high renewable energy penetrated power system (HREPPS). Considering the frequency regulation capability (FRC) of renewable generators, this paper proposes an optimization method of coordinating generator restoration with load restoration in the network configuration stage of the HREPPS. Firstly, the unified transfer function structure is introduced to analyze the FRC of restored HREPPSs. Then a quantification model of the maximum pick-up load is proposed considering the frequency dynamic performance of restored HREPPSs. Secondly, the optimization model with FRC is proposed to coordinated restore all generators and more load in the shortest time. Finally, results on a modified IEEE 39-bus system are studied to verify the applicability of the proposed FRC model and coordinated restoration method for the HREPPS. This work can serve as an important guidance for operators to develop restoration strategies for the blackout HREPPS.