基于滑窗迭代DFT的谐波参考电流控制信号快速检测方法

为解决电网中非线性负荷形成的无功电流和谐波电流对电网的影响，针对需为有源滤波器的控制提供谐波参考电流控制信号的特点，确定了谐波参考电流控制信号快速检测方法，并详细对谐波参考电流控制信号采用滑窗迭代DFT检测方法进行了理论分析，给出了谐波检测滑窗迭代算法软件流程图。MATLAB仿真结果证明，该方法简单可靠、实时性好、检测精度高。

The method that reference electric control semaphore quickly examines according to slippery window interation DFT harmonic

For solving the effect of harmonics wave current and reactive current formed by non-linear loads in power system to grid, aiming at the need to provide harmonic reference current control signal for the control of active power filter, The fast detection method of harmonic reference current control signal is established.The theoretical analysis of adopting sliding window iterative detection method to harmonic reference current control signal are detailed. The software flowchart of sliding window iterative algorithm for harmonics detection is given. The Matlab simulation result shous that the method is simple, reliable, good real-time, high detection accuracy.