有源电力滤波器谐波抑制控制策略

Harmonic suppression control strategy for active power filter

鉴于现在许多的电气设备都要求有较高的电能质量,所以改善电能质量,滤除谐波具有重要意义。有源电力滤波器(APF)是一种能够动态抑制谐波和无功补偿的新型电力电子装置,在补偿和抑制谐波时可以快速的跟踪负载的变化。在有源电力滤波器的研究中常常以开关频率较高的理想情况下忽略时滞的影响,但是实际上开关频率很难达到理想开关频率。数字控制系统中往往会存在着时滞现象,时滞的存在会对系统的稳定性以及动态性能造成影响。

Since many electrical equipment nowadays require high power quality,improving power quality and filtering out harmonics are of great significance.Active Power Filter(APF)is a new type of power electronic device that can dynamically suppress harmonics and reactive power compensation,and can quickly track load changes when compensating and suppressing harmonics.In the research of active power filters,the effect of time delay is often ignored under the ideal condition of high switching frequency,but in fact,it is difficult to achieve the ideal switching frequency.Time delays often exist in digital control systems,which can affect the stability and dynamic performance of the system.