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.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
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)
关键词
谐波
无功功率
频域
低通滤波器
harmonics
reactive power
frequency domain
low-pass filter
