高速动车组大功率多重化四象限整流器控制方法

Control Method of High-Power Multiplexed Four-Quadrant PulseRectifier for High-Speed EMU

以虚拟d-q电流解耦控制方法为基础,介绍了单牵引变流器内两重化四象限脉冲整流器控制方法、同一控制器中载波移相的实现方法、不同控制器之间多重化四象限脉冲整流器载波移相的实现方式、四象限脉冲整流器开关频率较低时(小于500 Hz)的调制补偿方法。在实际大功率变流器上验证了该控制方法。证明该方法可以实现网侧电流谐波低、网侧单位功率因数高及直流侧电压恒定的控制目标。

Based on virtual d-q current decoupling control method,we introduce the control method of dual four-quadrant pulse rectifier in single traction converter,the implementation method of carrier phase-shifting in the same controller,the implementation method of carrier phase-shifting of multiplexed four-quadrant pulse rectifier between different controllers,and the modulation compensation method when the switching frequency of four-quadrant pulse rectifier is low(less than 500 Hz).Finally,the control method is verified on an actual high-power converter.It is proved that this method can achieve the control objectives of low harmonic current at the grid side,high unit power factor at the grid side and constant voltage at the DC side.