近年来，变速驱动系统的应用快速增长。但是一个不利的影响是它会在电力系统中产生谐波，并且降低真功率因数。真因数越低，意味着输电网中产生越高的无功功率，降低电能的利用。变速驱动系统输入侧的无源滤波器通过减少谐波，提高真功率因数来减少能源损耗。文章叙述了变速驱动系统输入侧的无源滤波器的设计方法，并且用PSPICE软件进行了仿真验证。%The usage of Variable Speed Drives (VSDs) have grown rapidly in recent years. However, a unfortunate side effect of their usage is the introduction of harmonic distortion in the power system and reduction of true power factor (TPF). The lower the true power factor, the higher the apparent power drawn from the distribution network, which makes poor electrical efficiency. A passive filter connected at the input side of a VSD converter reduces energy losses in the power supply system by reducing harmonics and improving the true power factor. This paper describes the design method of passive filters at the input side of a VSD and use PSPICE software to simulate and verify.
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