结合仿真与解析方法的电动汽车充电谐波特性研究

Electric vehicle charging harmonic characteristics research based on a combination of simulation and analytic method

本文结合仿真与解析2种手段对充电机谐波特性进行深入分析。首先依据实测数据描述了充电机的负荷特性,然后在建模仿真的基础上,分析了单台充电机充电、多台充电机同步和非同步充电时的谐波电流特性。并基于叠加原理对多台充电机同步充电所产谐波电流进行了解析计算,揭示了多台充电机充电时的谐波抵消现象,给出了计及谐波抵消效应的谐波电流近似计算方法。

This paper conducts an in-depth analysis of chargers’ harmonic characteristics based on simulation and analytic methods. The load characteristics are described by measured data. The harmonic current characteristics of single-charger charging, multiple-charger synchronous and non-synchronous charging is discussed on the basis of modeling and simulation. Based on the principle of superposition, harmonic current of multiple chargers synchronous charging is analytically calculated, and the harmonic cancellation phenomenon when charging is revealed. An approximate calculation method for harmonic current accounting for the harmonic cancellation is proposed.