电力系统谐波及其检测方法研究

Research on harmonics and its measurement method in power system

谐波测量在电力系统中占有重要的作用和地位。本文概述了谐波测量的主要方法,对基于加窗插值FFT的谐波测量方法进行了分析和研究。在此基础上,设计并实现了一种多功能虚拟谐波测量系统,采用加窗插值FFT算法,以图形化编程语言LabVIEW为开发平台,实现了电力系统电压、电流谐波参数的测量。与传统的谐波测量系统相比,该系统硬件简单、编程灵活、可自定义、数据分析与处理能力强、使用方便,测量结果证明了系统的可行性和准确性。

The harmonic measurement plays an important role in power system. In this paper, some main harmonics measurement methods are generally described, and a harmonic measurement method based on interpolating windowed FFT is discussed. According to the interpolating windowed FFT method, a multifunctional virtual instrument system for harmonic measurement of voltage and current signals is designed and implemented with LabVIEW environment. Compared with traditional harmonic measurement system, this system is flexible, self-defined, capable of data processing and analysis, with simple hardware and so on. The measurement results show the feasibility and the validity of the system.