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四象限级联型变频器PWM整流的数字化控制与实现

, PP. 493-500

Keywords: 四象限级联型变频器,PWM整流,比例谐振控制,Delta算子,数字实现

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Abstract:

提出了一种四象限级联型变频器PWM整流的控制策略。通过分析H桥逆变输出功率波动对直流母线电压稳定和PWM整流控制的影响,电压外环增加自调整的陷波器,电流内环采用比例谐振(PR)控制器减小交流侧参数变化对系统的影响。采用基于Delta算子的直接型结构,数字化实现了PR控制器和陷波器,给出了关键参数的设计准则。实验验证了PWM整流器及其控制策略在整流、逆变工况下的稳态、暂态运行情况,具有良好的四象限运行性能。

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