Power electronics broad application in power systems brings serious harmonic pollution. This paper introduces harmonic harm, the measure of restraining harmonic and the basic principle of filter.
电力电子装置的广泛应用，给电力系统造成了一定的谐波污染，文中简要论述谐波的危害、谐波的治理措施及无源滤波器和有源滤波器的基本原理。
After studying on the measurement principle of power system harmonic based on FFT theory, this paper presents a high-accuracy method based on phase difference correcting to measure the harmonic.
研究了基于FFT理论的电力谐波检测原理，提出一种基于相位差校正法的高精度电力谐波检测方法。
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