摘要
有源电力滤波器(APF)是治理电网谐波污染的有效手段,重复控制由于能够对周期性的参考信号实现无差跟踪,而被广泛地应用到APF中。传统的重复控制由于存在着一个基波周期的延时而使得其动态响应慢,不能及时跟踪指令电流,影响使用效果,因此,本文从不同方面介绍了重复控制的改进,以达到更优的补偿效果,并简单说明了各种方法的可取与不足之处,最后对改进后重复控制仍存在的问题进行说明。
Active power filter(APF) is an effective means to control the harmonic pollution of the power grid. Repetitive control is widely used in APF for it can track the reference signal periodically without error. The dynamic response of traditional repetitive control is slow for it has a periodic delay of fundamental wave. So it can't track instruction current in time and has a bad effect. This paper introduce the improvement of repetitive control which can achieve better compensation effect from different aspects. A brief comment on the desirability and deficiency of various methods is given. Finally, the existing problems of the improved repetitive control are explained.
引文
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