三相逆变电源解耦控制与输出滤波器设计研究

Research on Decoupling Control and Output Filter Design of Three-phase Inverter Power

通过对电力机车的三相逆变电源电路数学模型的分析,揭示了三相逆变电源在二相同步旋转dq坐标系下系统变量间的耦合关系,引入了一种将逆变电源的输出电压和负载电流进行前馈的双闭环解耦控制策略,实现了对三相逆变电源的线性解耦控制,此外,还对双闭环控制策略和后级输出滤波器参数的设计进行了研究,提出了一种具有较强实用性的工程设计方法。通过仿真和搭建样机试验证明了控制策略的正确性。

By analyzing the mathematical model of the three-phase inverter power of electric locomotive,the coupling relationship between the system variables of the three-phase inverter power in the two-phase synchronous rotation d-q coordinate system was revealed.A double closed-loop decoupling control strategy feed forward the output voltage and load current of the inverter was introduced,which realized the linear decoupling control of the three-phase inverter.In addition,the design of the double closedloop control strategy and the parameters of the post output filter were also studied,and an engineering design method with strong practicability was put forward,which was validated by simulation and prototype test.