An Optimization and Dispatching Method of Shared Energy Storage Based on the Operation Risk of Distribution Network

The output of distributed power supply (DG) is volatile. A certain ratio of energy storage devices can smooth the output of DG, and tap the potential of DG stable power supply to the distribution network load. The scheduling of shared energy storage (SESS) based on power supply reliability is an important topic in the study of SESS operation. With the increasing operation risk of distribution network, the operation mode of SESS analyzed only from the perspective of operation cost is no longer accurate. Therefore, this paper proposes a shared energy storage optimization scheduling method that considers the operating risks of distribution network. Its characteristics are as follows: The optimal scheduling model of shared energy storage device is established considering both the operating economy and potential operating risks of distribution network. While taking into account the effect of island division, the rapid assessment of distribution network risk is realized. Finally, the optimal scheduling scheme of shared energy storage with the lowest comprehensive cost of economy and risk is obtained based on genetic algorithm, and an example analysis is conducted on the improved PG&E 69-node distribution grid, which verifies effectiveness of the optimization and dispatching method.