基于改进i_(p)-i_(q)法的谐波多功能精细检测方法

Multifunctional refined harmonic detection method based on improved i_(p)-i_(q) method

为了实现复杂电网环境下对基波和任意次谐波精细化检测补偿的需求,基于传统i_(p)-i_(q)检测法设计了一种对基波和任意次谐波电流的多功能精细检测新方法。基于瞬时无功功率理论给出了谐波电流有功/无功分量的定义,通过使用单锁相环结合倍频器的方法获取了各指定次谐波的频率信号,利用相位合成补偿的方法改进了传统ip-iq法的Park变换矩阵,设计了直流分量积分提取法代替传统方法中的低通滤波器。该方法弥补了传统检测方法的功能性不足,并具有更高的检测速度和检测精度。通过MATLAB/Simulink仿真分析,验证了所提方法的有效性和灵活性。

To realize the requirement of refined detection and compensation of fundamental and arbitrary harmonics in complex power grid environment,a new multi-functional refined detection method for fundamental and arbitrary harmonics is designed based on the traditional ip-iq detection method.Based on the instantaneous reactive power theory,the definition of the active/reactive component of harmonic current is given.The frequency signals of the specified harmonics are obtained by using a single phase-locked loop combined with frequency multiplier.The Park transform matrix of the traditional ip-iq method is improved by using the phase synthesis compensation method,and the DC component integral extraction method is designed to replace the low-pass filter in the traditional method.This method makes up for the lack of functionality of traditional detection methods,and has higher detection speed and accuracy.The effectiveness and flexibility of the proposed method are verified by MATLAB/Simulink simulation.