两种单相电路的任意次谐波检测比较

由于电力系统的谐波受到随机性、非平稳性、分布性等多方面因素影响,要进行实时准确的检测并不容易,幅值分离法在硬件上要求很复杂,实时性较差,所以本文介绍了旋转坐标变换法,推导了两种方法任意次谐波实时检测方法的过程,并在此理论的基础上对5次谐波检测进行了仿真,实现了5次谐波的实时检测,证明了两种方法通过修改硬件参数都能实时的完成任意次谐波电流的检测,但幅值分离法在实时性和对硬件的要求上不及旋转坐标变换法好。

The Comparision between Two Methods of Random Harmonic Detection in Single-phase Circuit

Because of random,stability and distribution and so on various factors,it is difficult to detect power system harmonic in real-time.The hardware requirements of amplitude separation are complex,and real-timeliness are poor.This paper introduces rotating coordinate transform,and deduces the process of the two real-time random harmonic detection,and gives the simulation based on the theory for 5th harmonic,realizes the real-time detection of 5th harmonic,and proves that both of the two methods can complete detecting random harmonic in real time by change the parameter of the hardware.But the real-time and hardware requirements of Amplitude separation are worse than rotating coordinate transform.