由APF和PPF组合构成的混合型有源电力滤波器可使二者取长补短，实现大功率下谐波抑制和无功补偿。
Hybrid active power filter combined by APF and PPF, learning from both their strong points to offset their weaknesses, can be applied for high power harmonic control and reactive power compensation.
首先，详细分析有源电力滤波器的各种拓扑结构，并在此基础上选择适合高压、大功率系统的有源电力滤波器拓扑结构进行深入分析；
Firstly, the topology which is appropriate for high voltage and big power system is selected based on the analyses of various active power filter topology, and analysis it deeply.
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