NARI Group Corporation (State Grid Electric Power Research Institute), Nanjing 211106, China

After the blackout, how to make full use of the limited available capacity in the restoration process to quickly restore more valuable restoration goals is the key issue for the power system to quickly restore power supply and reduce power outage losses. To make full use of the restoration capacity of high-proportion renewable energy power supply in the new power system, a restoration decision-making method is proposed based on the unified evaluation for the importance of new power system restoration targets. Firstly, aiming at the importance evaluation for renewable energy power supply to be restored, a scenario generation method for multi-step expected sequence of renewable energy power supply considering temporal and spatial correlation is proposed. Secondly, considering the active cooperative ability of energy storage and flexible load, a unified evaluation method for the importance based on the net income of restoration is established for the restoration targets such as independent power supply, power supply cluster and substation bus to be restored, and it is revealed that the essence of restoration stage is a special case of the optimization result of the source-grid-load collaborative restoration order. Then, with the goal of maximizing the expected net income of power grid restoration scheme, an optimization model of unified and coordinated source-grid-load restoration control for new power systems is established. Finally, based on the IEEE 118-bus case system, it is verified that the proposed method can dynamically evaluate the importance of restoration targets during the restoration process, so as to effectively guide the efficient allocation of the restoration capacity and maximize the restoration benefit.