The active power Filter, which can compensate simultaneously the harmonics and reactive power of non-linear loads, is good method to eliminate the harmonic pollution in power system.

采用有源滤波器就地吸收谐波源所产生的谐波电流，是消除或限制电力系统谐波污染的一种有效的措施。

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According to the equivalent circuit model of non-linear load, a detecting approach of harmonic current in single-phase circuit based on fast iterative algorithm in active power filter is proposed.

根据非线性负载的等效电路模型，提出了一种基于快速跟踪算法的有源电力滤波器单相电路谐波电流检测方法。

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A weighted algorithm is proposed for reducing effectively the error caused by non-synchronous sampling in active power and power factor measurement.

提出了一种能有效地抑制由非同步采样引起的有功功率及功率因数的测量误差的加权算法。

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