This paper proposes a cascaded nonlinear PI controller for three-phase voltage source PWM rectifier, which is based on its model in synchronous reference frame.

该文以同步旋转坐标系模型为基础，设计了三相电压型PWM整流器的级联式非线性PI控制器。

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By making changes of reference voltage phase diagrams of load, this method can enlarge the compensation range and decrease the energy output of DVR.

该方法通过对负载参考电压相角的旋转和幅值的“伸缩”，扩大了DVR的补偿范围，减少了D VR的有功输出。

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The low-voltage driving circuit is adopted to drive a piezoelectric ceramic phase shifter to shift the phase of the reference beam, so as to make the instrument lighter, smaller and cheaper.

采用低压驱动电路驱动压电陶瓷相移器对参考光束进行相移，从而使仪器质量减轻、体积缩小、成本降低。

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