低频间谐波检测分析与治理技术研究综述

A Summary of Research on Low Frequency Inter-harmonic Detection Analysis and Governance Technology

由于大量的变频器、电弧炉等非线性负荷接入电网,电力系统中的低频间谐波问题日益严重。低频间谐波除了具有一般间谐波的特性外,还会干扰通信,以及引起低频振荡等,因此低频间谐波的检测分析与治理技术的研究具有十分重要的意义。首先,总结了低频间谐波检测方法及发射特性的研究现状,指出其缺少实时检测方法和精确发射模型的问题;其次,综述了现有的低频间谐波治理技术,阐明国内外研究较少,缺乏成熟的治理方案;最后,指出电弧炉低频间谐波发射模型、低频间谐波传播特性及其治理技术将是未来此领域的可能研究方向。

Since a large number of non-linear loads such as inverters and electric arc furnaces are connected to the power grid, the problem of low-frequency inter-harmonics is becoming more and more serious.In addition to the general inter-harmonic characteristics,it can also interfere with communication and cause low-frequency oscillation.Therefore,it is of great significance to study low-frequency inter-harmonic and governance technology.Firstly,the research status of low-frequency inter-harmonic detection methods and emission characteristics are summarized.The problems of lacking real-time detection methods and accurate emission models are pointed out.Secondly,it summarizes the existing low-frequency inter-harmonic governance technology,clarifies that there are few studies at home and abroad,and lacks mature treatment programs.At last, it points out that the low-frequency inter-harmonic emission model of the electric arc furnace,the propagation characteristics of low-frequency inter-harmonic and its governance technology will be the possible research direction in this field in the future.