含规模化电动汽车接入的配电网量子化状态系统运行模拟方法

The broad integration of electric vehicles (EVs) dramatically changes the demand characteristics of distribution networks, which requires effective simulation methods to support the applications such as the operation analysis and the flexible interactions between the EVs and the networks. The EVs have discretized characteristics in their access, exit, and charging power changes. With the rapid increase of the EV access, the efficiency of the traditional time-domain operation simulation will drop significantly. This paper proposes a new method of simulation based on the quantized state system (QSS) theory for distribution networks with EVs integrated, which employs the efficiency advantage of the QSS in the simulation with massive discretized events, realizing the fast and accurate operation simulation in distribution networks with large-scale EVs integration. An event table is utilized to coordinate the joint solution process of the EVs charging behavior simulation and the distribution network power flow calculation, which realizes the overall operation simulation and the interactive analysis of distribution networks with massive EVs. Finally, a typical case study is used to verify the proposed method in the aspects of speed, accuracy, and applicability.