有源滤波技术现状及其发展

随着各种功率器件的广泛应用，大量的谐波和无功电流注入电网，引起电网污染，造成电网电能质量问题日益严重。过去，国内外大量采用无源滤波装置来进行谐波抑制和无功补偿，提高功率因数。但无源滤波装置也存在着自身无法克服的不足和缺陷，因此有源滤波技术成为近几十年以来学术和工程界的研究热点。本文对有源滤波技术的历史发展作了简要回顾，详细介绍了有源滤波器的分类，重点比较了现有的和提出的有源滤波器信号检测以及控制方法，同时展望了有源滤波器的发展前景。这些技术的发展可使有源滤波器获得更好的性能和更广泛的应用。

Active power filter technology and its development

With the wide application of power electronic switches in power system, more harmonic and reactive current are poured into the power, which caused power pollution. Conventionally passive filters were used to reduce harmonics and reactive power to improve the power factor of the ac loads. However, passive filters have the demerits of fixed compensation, large size and resonance. Thus, the experts and power system engineers now focus on the active power filter. The background, development, classifications and the future prospects of active power filters are presented in this paper. With the developments of technique, active power filters will achieve higher performances and wider applications.