基于滑窗迭代DFT和小波包分析的谐波电流检测方法

为了对电网中负载电流信号进行有效地检测,给出一种基于滑窗迭代DFT和小波包分析的谐波电流组合检测方法;方法先利用滑窗迭代DFT将负载电流信号中的基波分量和谐波分量分离,再用小波包对前面得到的谐波分量进行分析,更加精确地分离出残余基波和各次谐波含量;利用MATLAB进行仿真实验,实验结果验证了所给方法的有效性和准确性.

Harmonic Current Detection Method Based on Sliding-window Iterative DFT and Wavelet Packet Analysis

In order to effectively detect load-current signal in power grid, a harmonic current combination detection method based on sliding-window iterative DFT and wavelet packet analysis is proposed, this method firstly uses sliding-window iterative DFT to separate the fundamental component and harmonic component in load-current signal, then uses wavelet packet to analyze the obtained harmonic component, so as to more accurately separate the residual fundamental wave and every harmonic content, and then uses MATLAB to conduct simulation experiment. The experiment results prove the validity and accuracy of the proposed method.