摘要
论述了电网谐波分析与滤除系统的结构、原理和功能 ,阐述了谐波的检测与分析、系统控制信号的计算与产生 .系统主电路是 1个混合有源滤波器 ,系统软件包括基波及各次谐波的检测、统计分析、历史数据查询和报警等模块 .系统采用快速傅里叶变换进行谐波分析 ,并提出一种改进规则采样法对混合有源滤波器进行谐波跟踪控制 .实验结果表明 ,系统对各电量的检测误差均小于 2 % ,三相电压总畸变率由滤波前的 10 .5 % ,11.3%和 11.7%下降到滤波后的 3.9% ,4.2 %和 4.4% ,三相电流总畸变率由滤波前的 2 6 .2 % ,2 5 .7%和 2 5 .8%下降到滤波后的 7.9% ,6 .9%和 7.4% .
A harmonic analysis and elimination system is proposed in this article. The harmonic analysis software and a hybrid active power filter with improved regular sampling method are described. The experimental results show that the detection error is less than 2%, the THDs of voltage of three phases have been reduced to 3.9%, 4.2% and 4.4% from 10.5%, 11.3% and 11.7% respectively, and that the THDs of voltage of three phases have been reduced to 7.9%, 6.9% and 7.4% from 26.2%, 25.7% and 25.8% respectively.
出处
《中南工业大学学报》
CSCD
北大核心
2001年第6期631-634,共4页
Journal of Central South University of Technology(Natural Science)
基金
国家计委自动化高技术项目 (计投资 [2 0 0 0 ] 2 498号 )
关键词
谐波分析
谐波滤除
混合有源滤波器
电网
非线性负载
畸变率
harmonic analysis
harmonic elimination
hybrid active power filter
improved regular sampling method
