基于复合控制的车载充电机谐波抑制策略

A Novel Harmonic Suppression Strategy Based on On-board Charger

车载充电机是电动汽车重要的能量转换装置。针对车载充电机的谐波问题,分析了其谐波特性,对其整流电路进行了结构性改进,并将全控器件引入其中,提出了一种PI控制与重复控制相结合的复合控制策略。在仿真环境下,分析了单台与多台车载充电机在无谐波抑制方法下的谐波特点,再将所提出的新型复合控制策略应用于车载充电机,分析其谐波特点。仿真结果表明,所提出的复合控制策略能有效地抑制车载充电机的谐波污染。

An on-board charger is an important energy conversion device for electric vehicles.Considering harmonic problems of on-board charger,harmonic characteristics are analyzed at first,the structure of rectifier circuit is modified to full-control rectifier circuit.In the meanwhile,it proposes a composite control strategy which combines PI control and repetitive control.In the simulation,it analyses the harmonic characteristic of single on-board charger and multiple on-board chargers,which is without harmonic suppression strategy and with the composite control strategy.The simulation shows the harmonic pollution can be suppressed effectively by the novel composite control strategy.