不同因素对电动汽车充电站谐波的影响研究

Study on the Influence of Different Factors on Harmonics of Electric Vehicle Charging Station

中文关键词: 电动汽车充电站  谐波分析  充电站THDi工程算法  时序特性

英文关键词: Electric vehicle charging station  harmonic analysis  charging station THDi engineering algorithm  timing characteristics

中文摘要:

      大规模电动汽车接入配电网在电网侧会引起谐波，因此，有必要对充电站谐波的影响因素开展研究。首先，本文对充电机的谐波机理进行了理论分析；其次，研究了不同功率等级的充电机对于充电站谐波的影响；然后，进一步研究了充电机运行数量、动力电池SOC与谐波之间的关系；最后，提出了一种计及电动汽车时序特性的电流总谐波畸变率（THDi）工程计算方法，经验证，该计算方法拥有较高的准确性，可满足工程实践的需要，并用所提方法计算了出租车充电站的THDi，研究了电动汽车的时序特性对充电站谐波的影响。

英文摘要:

      Large-scale electric vehicles access to the distribution network will cause harmonics on the grid side. Therefore, it is necessary to study the influencing factors of the harmonics of the charging station. Firstly, the theoretical analysis of the harmonic mechanism of the charger is carried out. Secondly, the influence of chargers with different power levels on the harmonics of the charging station is studied. Then, the number of chargers, the SOC of the power battery and the harmonics are further studied. In the end, a calculation method of current total harmonic distortion rate (THDi) considering the timing characteristics of electric vehicles is proposed. It is verified that the calculation method has high accuracy and can meet the needs of engineering practice. The THDi of the taxi charging station was calculated by the proposed method, and the influence of the timing characteristics of the electric vehicle on the harmonics of the charging station was studied.