本文简单介绍了高次谐波产生的机理、危害及有效抑制干扰的方法。
This paper brief introduces the mechanism, damage and restraining method of high order harmonic.
用此方法实际产生了各种模式的SPWM波，并对其谐波进行预评估。
With this method, we generate and evaluate practically different modes of SPWM waves.
本文从谐波的危害和产生入手，先介绍了有源滤波器的原理及结构，然后对有源滤波器的谐波检测和控制方法做出分析比较。
This paper starts from source and harm of harmonics, continues with the principle and structure of APF, and a comparison of several harmonic detection and control methods.
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