以园区微电网为研究对象,将充电站内电动汽车分为私家电动车和电动班车2种主要类型,进行孤岛运行可靠性评估。首先,通过分析不同类型电动汽车的行驶时间特性,提出电动汽车充电站联合储能设备与微电网电力系统间的功率互动策略以及互动功率计算模型。随后,以开关为边界对微电网馈线区域进行分级,提出不同故障隔离操作方法。并在传统评估指标的基础上,提出电动汽车充电站平均充电、放电、负荷削减深度等评估指标。最后, 采用序贯蒙特卡罗智能算法,以IEEE配电系统可靠性评估测试系统 RTBSBus6的 F4馈线区域为基础而修改的配电网络为算例,进行仿真计算。计算结果表明:当响应 V2G 技术的电动汽车充电站接入微电网后,合理的功率互动策略可有效提高微电网孤岛运行状态下的可靠性。
This paper takes the park microgrid as the research object,and the electric vehicles in the charging station are divided into two main types: private electric vehicles and electric buses. Firstly, the travel time characteristics of different types of electric vehicles are analysed in this paper. The power interaction strategy between the combined energy storage equipment of electric vehicle charging station and the microgrid power system, the interactive power calculation model are constructed. Then, grading the microgrid feeder area with the switch as the boundary, the isolation operation methods for different faults are proposed. Based on the traditional evaluation indicators, the evaluation indexes of average charging depth, average discharge depth and average load reduction depth of electric vehicle charging stations are proposed. Finally, Sequential Monte Carlo intelligent algorithm is adopted for simulation. The power distribution network modified based on the F4 feeder area of the reliability evaluation test system of IEEE distribution system RTBS Bus 6 is used as an example to carry out simulation calculation. The calculation results show that after the electric vehicle charging station responding to the V2G technology is connected to the microgrid, a reasonable power interaction strategy can effectively improve the reliability of the microgrid under island operation.
陈龙超,范宏,郭翔,梁纪峰.含EV充电站的园区微电网孤岛运行可靠性评[J].电力科学与技术学报,2021,(4):100-108. Chen Longchao, Fan Hong, Guo Xiang, Liang Jifeng. Reliability evaluation of park microgrid with EV charging station running in islanding state[J]. JOURNAL OF EIECTRIC POWER SCIENCE AND TECHNOLOGY,2021,(4):100-108.复制