孤网系统滤波器谐波放大机理及抑制方法  

Harmonic Magnification Mechanism and Suppression Method of Filter in Isolated Network System

作　　者：罗隆福[1] 陈洁 崔贵平 邹津海[1] 周方圆[2] 吕顺凯[2] LUO Longfu;CHEN Jie;CUI Guiping;ZOU Jinhai;ZHOU Fangyuan;Lü Shunkai(College of Electrical and Information Engineering,Hunan University,Changsha 410000,Hunan,China;Zhuzhou National Engineering Research Center of Converters Co.,Ltd.,Zhuzhou 412000,Hunan,China)

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410000 [2]株洲变流技术国家工程研究中心有限公司,湖南株洲412000

出　　处：《电气传动》2019年第4期54-60,共7页Electric Drive

基　　金：湖南省科技重大专项(2015GK1027)

摘　　要：分析了发电机带整流负载孤网运行系统的一般结构,针对孤网系统运行时滤波器与发电机发生的谐波放大现象,从谐波放大等效电路、孤网运行频率下降、负载变化引起频率波动3个方面分析了其放大机理。并从谐波放大机理入手,研究了发电机调速系统的调节特性,提出了一种基于滤波参数优化和控制负载变化速率的谐波放大抑制方式,具有简单灵活的优点。以孤网直流融冰为例,通过实验验证了对孤网系统滤波器谐波放大机理分析的正确性及谐波放大抑制策略的有效性。The general structure of the isolated network with rectifier load was analyzed. Harmonic amplification mechanism of the filter and the generator in this type of isolated network system was analyzed from three aspects: the equivalent circuit of harmonic amplification, the frequency drop of the isolated network and the frequency fluctuation. Starting with the mechanism of harmonic amplification, the regulation characteristics of the generator speed regulation system were studied. According to harmonic amplification frequency condition, the harmonic amplification suppression mode based on the optimization of filtering parameters and the speed of load increase was proposed, which had the advantages of simple and flexible. The correctness of the harmonic amplification mechanism of the isolated network and the effectiveness of the suppression strategy were verified by a ice-melting experiment.

关 键 词：孤网系统 滤波器 谐波放大 谐波抑制 

分 类 号：TM712[电气工程—电力系统及自动化]