一种广义谐波检测算法

A Generalized Harmonic Extraction Algorithm

随着电力电子设备广泛应用,导致谐波污染和无功损耗问题日益严重。有源电力滤波器是典型谐波治理装置,其中谐波电流检测环节对有源电力滤波器性能具有重要影响。传统p-q检测法和i_(p)-i_(q)法在实现补偿时精度较差,且检测精度与响应速度之间相互限制。为解决该问题,提出一种新型谐波电流检测方法。该检测方法无需锁相环节,具有检测精度高、速度快等优点,此外还可应用于单相系统。最后搭建基于TMS320F28335型数字信号处理器(DSP)数字实验平台,通过实验验证了提出方法的有效性。

With the widespread use of power electronics,harmonic interference and reactive power loss are becoming more and more serious.Active power filter has become a widely used harmonic suppress method.The harmonic current detection link has an important influence on compensation performance of active power filter.The traditional p-q method and i_(p)-i_(q)method cannot realize the comprehensive compensation of the load accurately.And the detection accuracy and detection speed have always been a contradiction.To solve this problem,a novel harmonic current detection method is proposed.The proposed detection method needn't require phase-locked loop link and has the advantages of high detection accuracy and fast speed.Also,the proposed method can be applied to single-phase system directly.Finally,a digital experimental platform based on TMS320F28335 digital signal processor(DSP)is built.The experimental results verify the effectiveness of the proposed method.