摘要
ip-iq法能准确实时地检测出不对称三相系统中的有害电流,它不受零序电流的影响,可以直接用于不对称系统中谐波及无功电流的检测,是目前广泛应用的一种谐波及无功电流检测方法。文中介绍了ip-iq坐标变换的谐波电流检测法的基本原理,在此基础上提出了一种无锁相环的实现方法。分析指出,ip-iq谐波电流检测方法坐标变换过程中,C变换矩阵的频率偏差对检测结果不构成影响。并通过仿真验证了该方法是准确可行的。
Because ip-iq detecting method can detect harmful currents accurately and real-timely and will not be affected by zero-sequence current, it can be directly used in detection of harmonic and reactive current in unsymmetrical system. At present, it is a widely used method for harmonic and reactive current detecting in active power filters. The basic principle of ip-iq harmonic current detection is presented and on this basis an implementation method without phase lock loop (PLL) is put forward. It is concluded that the detection results will not be influenced by frequency offset in the C matrix transformation process of ip-iq harmonic current detecting method. The simulation results prove that the presented method is accurate and feasible.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2006年第2期50-53,62,共5页
Proceedings of the CSU-EPSA
基金
重庆大学高电压与电工新技术教育部重点实验室访问学者资助项目
关键词
谐波电流
检测方法
锁相环
有源滤波器
harmonic current
detecting method
phase lock loop(PLL)
active filter
作者简介
尉冰娟(1981-),女,硕士研究生,主要从事电力电子及电气传动研究。Email:cqweibingjuan@126.com
王明渝(1959-),男,教授,博士生导师,主要从事电力电子技术、电气传动、电机电器研究等。Email:yubj99@sina.com
张淑国(1979-),男,主要从事北京电力公司客户服务中心工作。Email:cqzhangshuguo@sina.com