谐波及无功电流检测低通滤波器的优化设计方法  

An optimal design of low-pass filter in detection harmonic and reactive currents

作　　者：王少杰[1,2] 罗安[1] 孙贤大[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082 [2]邵阳学院电气与信息工程系,湖南邵阳422000

出　　处：《中南大学学报（自然科学版）》2010年第3期1022-1027,共6页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(60774043);湖南省教育厅优秀青年基金资助项目(08B071)

摘　　要：针对电网中谐波电流较小且主要为奇次谐波的特点,对现有的谐波及无功低通滤波器设计方法进行分析,阐述ip-iq谐波检测算法基本工作原理,对其频域特性进行分析,提出将N/2阶均值滤波和二阶巴特沃斯滤波器相结合的设计方法。研究结果表明:所提出的设计方法性能优良,能够显著提高谐波及无功电流检测的稳态精度和动态响应速度;仿真实验结果证明了该方法的正确性与有效性。Based on harmonic current in the grid,the frequency domain was analyzed after explaining the basic working principle of ip-iq harmonic detection,and a novel detection filter combining synthetically Butterworth Filter to N/2 average low-pass filter was put forward. The results show that the method can make instantaneous harmonic and reactive current detection of low-pass filter can be optimized; accuracy and dynamic response are improved significantly,and also this proposed method is accurate and effective.

关 键 词：谐波 无功功率 频域 低通滤波器 

分 类 号：TM76[电气工程—电力系统及自动化]