Active power filter can compensate current components which include distortion and negative sequence current components when it is used in unbalanced three-phase circuit.

电力有源滤波器能动态补偿不对称三相电路的畸变电流、负序电流分量。

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The reactive power and current of three-phase unbalanced load are compensated.

配电网三相负荷不平衡运行将增加配电网的电能损耗。

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And some indexes of power quality: voltage deviation, real power, reactive power, harmonic content, voltage fluctuation and unbalanced three-phase voltage and current, are discussed at length.

同时本文对电能质量的有关指标：电压偏差、频率偏差、各种功率、谐波含量、电压波动和三相不平衡的计算和检测方法，进行了详尽地阐述。

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