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基于LCL滤波的大功率三相电压型PWM整流器

, PP. 79-84

Keywords: 三相电压型PWM整流器,LCL滤波器,谐振频率,无源阻尼

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Abstract:

三相电压型PWM整流器,交流侧采用LCL滤波器,在满足谐波标准时可以大幅减小电感量。本文首先分析了采用LCL滤波器时系统数学模型及控制算法,然后根据IEEE-519标准要求的电流谐波限制条件,利用SVPWM调制方式产生的谐波电压幅值进行迭代运算来计算LCL滤波器参数,同时从离散域分析了采用无源阻尼时系统的稳定性。在此基础上,本文研制了一台500kW三相电压型PWM整流器样机,实验结果验证了上述分析方法的有效性。

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