Whether the hybrid active power filter could get desirable effects of harmonic suppression depends on the constancy of DC-side voltage besides the correct design of the main circuit.

有源滤波器能否按其工作原理实现预期的谐波抑制效果，除了主电路设计合理之外，在很大程度上还依赖于保持直流侧电压的恒定。

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To avoid device damage caused by harmonic wave, a VQC device integrating harmonic suppression function is presented in terms of the filter capability of capacitor and reactor.

为避免谐波问题造成的电容器等设备损坏，提出了根据电容器和电抗器的滤波能力，把谐波抑制功能加入电压无功控制（VQC）装置。

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The basic operation principle of the series active power filter for harmonic suppression of frequency converter is analyzed in this paper, and its control method and control circuit are studied.

文章分析了适用于变频器谐波抑制的串联型有源电力滤波器的基本工作原理，并对其控制方法和控制电路进行了研究。

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