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基于复矢量PI调节器的四象限级联型变频器PWM整流控制策略

DOI: 10.13334/j.0258-8013.pcsee.2015.11.019, PP. 2804-2812

Keywords: 四象限级联型变频器,功率单元,瞬时功率平衡,复矢量PI调节器,卡尔曼滤波

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Abstract:

在分析四象限级联型变频器功率单元数学模型的基础上,以输入和输出瞬时有功功率平衡为控制目标,给出了PWM整流电流指令。为保证各频率电流的准确跟踪,提出了复矢量PI(complexvectorPI,CVPI)调节器,实现了各频率电流的完全解耦控制,论证了CVPI调节器相比传统调节器,对谐振频率变化具有更好的鲁棒性。同时,建立了基于卡尔曼(Kalman)滤波的直流母线输出电流辨识模型,实时地辨识电流大小及其频率。构建了功率单元实验平台,对所提控制策略的正确性与可行性进行了实验验证。

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