基于级联信号延迟消除算法的快速指定次谐波提取

实现精确快速的谐波检测是电力系统谐波补偿效果的保证。目前,已存在大量的指定次谐波检测方法,但是都存在着延迟时间长,对电网频率偏移敏感和检测精度不高等一些缺点。为了有效避免或者克服这些不足,提出了一种基于级联信号延迟消除法的新型指定次谐波检测方法,方法可灵活地提取畸变信号中的指定次谐波分量,并且具有较高的检测精度和较短的动态响应时间。最后,通过MATLAB/Simulink仿真验证了方法的可行性和优越性。

Fast Selective Harmonic Extraction Based on Cascade Delayed Signal Cancellation Algorithm

Fast accurate harmonic detection can ensure the effect of harmonic compensation in the electric power system.There exist many methods for selective harmonic detection,but all of them have disadvantages such as long time delay,low sensitivity to power grid frequency deviation and poor detection accuracy.In order to avoid or overcome these shortcomings,this paper presents a novel selective harmonic detection method based on cascade delayed signal cancellation (CDSC),which can flexibly extract selective harmonic components from distorted signals and have quite high detection accuracy and short dynamic response time.Finally, MATLAB /Simulink simulation verifies the feasibility and superiority of this method.