中文摘要：

为了保证主动配电网在考虑电动汽车接入情况下的有效运行,提出了一种考虑电动汽车时空负荷的主动重构策略。将配电网根据功能划分为居民配电网、工业配电网、商业配电网,首先在考虑电动汽车时空转移特性的基础上,利用统计学方法构建了电动汽车在不同时间接入不同配电网的负荷,并获取了3个配电网24 h的负荷趋势曲线。其次构建了配电网最大供电能力的评估指标,可有效评估配电网当前运行状态的安全水平,并综合考虑线损及最大供电能力指标形成多层次的优化目标,利用二进制粒子群算法对优化问题进行求解,以得到配电网主动重构的策略,保证配电网全天候的安全经济运行;最后,以IEEE 33节点配电系统为例,结合实际数据验证了本文所提出主动重构策略的可行性和有效性,对于配电网实际运行起到了指导意义。

英文摘要：

In order to keep the efficient operation of the active distribution power grid while the electrical vehicles pluging in, we propose an active reconfiguration strategy considering spatial-temporal electrical vehicle load model. According to the network function, the distribution network is classified into residential distribution network, industrial distribution network, and commercial distribution network. Firstly, based on the probability transfer characteristic of electrical vehicle in three distribution networks, the electrical load is built in terms of time and space by the statistical method, and the 24 hours load trend in a whole day in three distribution networks is obtained. Secondly, a power supply capability index（PSCI） is proposed, which is able to evaluate the security level of distribution network. The PSCI and line loss are set as the multilayer optimization objectives. The improved Krill Herd algorithm is proposed to solve the optimization problem to obtain the active reconfiguration strategy that ensures the safe and economical operation of the distribution grid in a whole day. Finally, the case study is carried out with a typical IEEE 33 bus distribution network and actual data. The simulation results show that the proposed active reconfiguration strategy is effective, which provides a guideline for practical operation of distribution network.