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电网电压不平衡时PWM整流器的谐振直接功率控制策略

, PP. 86-94

Keywords: 直接功率控制,PWM整流器,谐振调节器,电网电压不平衡

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Abstract:

为提高电网电压不平衡PWM整流器的运行性能,本文提出了一种基于谐振调节器的改进直接功率控制(DPC)策略,以分别实现PWM输入电流平衡、输入有功功率和无功功率无波动、直流侧电压和无功功率无波动三个不同的控制目标。该控制策略包含直流电压-功率闭环和谐振闭环两个调节器,以分别实现对PWM整流器平均功率和不同控制目标下波动分量的控制。同时深入分析了所提谐振DPC策略的稳定运行和抗干扰运行性能。最后,通过所构建的PWM整流器实验系统,验证了所提谐振DPC策略在PWM整流器中应用的有效性。

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