电流谐波检测方法对比研究

A Comparative Study of Current Harmonic Detection Methods' Utilities

电网谐波污染日益严重,有源电力滤波器作为谐波抑制的理想解决方案受到广泛的关注。谐波电流的检测性能影响有源电力滤波器的补偿效果。目前用于有源电力滤波器的谐波检测方法主要有瞬时无功功率、迭代傅立叶变换和卡尔曼三种方法。本文以Matlab为工具,将三种方法在稳态检测精度、收敛速度、负载波动检测精度、频率波动检测精度方面进行对比研究,对三种谐波检测方法的选择,给出指导性的建议。

Harmonic has deteriorated power quality in power network. The use of active filtering techniques has become more attractive. One of the key points for proper implementation of an APF is to use a reliable method for current/voltage reference generation. This article makes a comparison of the commonly real-time methods for harmonic detection in active power filters, including steady state accuracy, speed of convergence, detection precision on current and frequency fluctating, and then presents their pros and cons, respectively.