基于同步参考坐标变换的改进型谐波检测法

An Improved Harmonics Detecting Method based on Synchronous Reference Frame Transformation

在瞬时无功功率理论基础上,提出一种基于同步参考坐标变换的改进型ipi,q谐波电流检测方法。该方法用积分、延时和增益环节代替传统的低通滤波器,将检测延时减少到1/6电源周期。详细介绍了基于DSP芯片TMS320F240实现该检测方法的过程。仿真和实验结果表明,改进型检测方法易实现,检测精度高,实时性好,可用于有源电力滤波器系统中。

An improved harmonics current ip,iq detecting method based on synchronous reference frame transformation is proposed with the instantaneous reactive power theory.This improved method substitutes conventional low pass filter by in-tegration, delay and gain,which can reduce the detecting delay to 1/6 of source period.The realizing process of this approach with the aid of DSP chip （TMS320F240） is presented in de-tail.The simulative and experimental results indicate the easy realization, high precision and good real-time property of this improved method which can be applied to active power filter system.