电动汽车充电对配电网电压质量的影响分析

Analysis of the Influence of Electric vehicle Charging on Voltage Quality of Distribution Network

为了节约能源,电动车得到了大范围的推广,很多居民停车场、公共停车场、单位停车场都专门配置了充电站以满足电动车的充电需求。但是,分散充电如果规模太大,会影响到配电网电压质量。文章对电动汽车的充电方式和充电类型作了总结,分析电动汽车充电对配网质量的影响,明确谐波污染、电压降、三相电压不平衡等问题,研究如何进行有序充电控制、如何对电动汽车充电和分散供电,实现配网调控,分析V2G模式在提高配电网电压质量中的作用,并对相关领域的下一步研究工作进行了展望。

In order to save energy,electric vehicles have been widely promoted,so that many residential parking lots,public parking lots,and unit parking lots are specially equipped with charging stations to meet the charging needs of electric vehicles.However,if the scale of decentralized charging is too large,it will affect the voltage quality of the distribution network.It summarizes the charging methods and types of electric vehicles,analyzes how electric vehicle charging will affect the quality of the distribution network,and clarifi es issues such as harmonic pollution,voltage drop,and three-phase voltage imbalance.Study how to carry out sequential charging control,electric vehicle charging and decentralized power supply to realize the regulation of distribution network,analyze the role of V2G mode in improving the voltage quality of distribution network,and look forward to the next research work in related fi elds.