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中文摘要：
针对电网电压不平衡时脉宽调制型整流器功率波动的问题,建立不平衡电网电压下整流器在同步旋转坐标系中的数学模型,提出一种功率谐振补偿控制策略。该策略在传统电网电压定向矢量控制方法中增加功率脉动补偿环节,补偿环节采用在两相同步旋转坐标系中实施的比例谐振（proportional resonant,PR）功率控制方案。控制系统运行时无需对不平衡电流和电压进行正、负相序分解,并可同时抑制整流器输出的有功和无功功率波动,改善系统动态和稳态性能。仿真与实验结果证明了控制策略的正确性和有效性。
英文摘要：
In order to suppress the power fluctuations, a mathematical model of three-phase voltage source pulse width modulation rectifiers in the synchronously rotating reference frame is presented under unbalanced grid voltages. Also, a power resonance compensation control strategy is proposed. For the given strategy, a compensation part is added to the traditional voltage-oriented vector control method for solving power fluctuation. A proportional resonant （PR） power control scheme implemented in the two-phase synchronously rotating reference frame is adopted for the compensation part. The control system is operated without involving any sequential decomposition process, and active/reactive powers of rectifiers output are stabilized. Steady-state and dynamic performance of the system is improved. The proposed strategy is finally verified by simulation and experimental results.
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