考虑电动汽车接入的配电网灵活性评估方法

电动汽车的大量接入给配电网的运行调度和规划发展带了新的挑战。在此背景下，提出了考虑电动汽车接入的配电网的灵活性评估方法。首先基于杭州城市电动汽车充电站数据，利用核密度估计方法对电动汽车负荷进行建模。接着根据电力系统灵活性要素，尝试给出配电网灵活性定义。随后，综合考虑多种场景和多时间尺度灵活性指标，提出了基于信息熵和DS证据理论的配电网灵活性评价方法。最后对比了多种场景下的配电网的灵活性，验证了模型的有效性，可作为未来大规模电动汽车接入场景下配电网规划的指导标准之一。

A Method to Evaluate Flexibility of Distribution Network Considering Grid-Connection of Electric Vehicles

Huge amount grid-connection of electric vehicles (abbr. EV) brings new challenges to the operation, dispatching, planning and development of distribution network. Under this background, a method to evaluated flexibility of distribution network, in which the grid-connection of EV was considered, was proposed. Firstly, based on the data of EV charging station in Hangzhou city and by use of kernel density estimation method an EV load model was established. Secondly, according to the element of power grid flexibility the definition of distribution network flexibility was given. Thirdly, overall considering multi scenarios and multi time-scale flexibility indices, a distribution network flexible evaluation method based on information entropy and DS evidence theory was proposed. Finally, the flexibilities of distribution network under multi scenarios were contrasted, thus the effectiveness of the proposed model is verified. The proposed model is available for reference to draw up one of the guiding standards for distribution network planning under the scenario of grid-connection of huge amount EV in the future.