无电网电压传感器的DPC-TCM五电平整流器研究

Research on Five-level DPC-TCM Rectifier Without Grid Voltage Sensor

在高压大功率领域,五电平整流器比三电平性能更优。由于五电平空间矢量脉宽调制(SVPWM)算法运算量大,针对有源中点箝位五电平(ANPC-5L)拓扑结构,提出一种输出波形质量与SVPWM算法完全等效的空间矢量等效三电平载波调制(TCPWM)算法。建立电感滤波的五电平整流器的数学模型,采用无电网电压传感器的开关频率固定的准直接功率控制(DPC)策略。最后通过实验验证了所提TCPWM算法及控制策略的正确性。

In high-voltage high-power field,the performance of five-level rectifier is better than three-level rectifier.Be- cause of the large computational complexity of five-level space vector pulse width modulation （SVPWM） algorithm for active neutral point clamped five-level（ANPC-5L） topology structure ,a completely equivalent output waveform quality and SVPWM algorithm of space vector equivalent three-level carrier pulse width modulation（TCPWM） algorithm is pr- oposed.Five-level of inductive filtering is presented,and the mathematical model of the rectifier is built,with no power grid voltage sensor switch frequency fixed virtual flux of direct power control （DPC） strategy.Finally TCPWM al- gorithm is verified by experiment and the correctness of the proposed control strategy is validated.