电网技术Issue(11)：3118-3124,7.
应用子空间跟踪和递归最小二乘法的间谐波背景下电流基波分量的实时检测
Realtime Detection of Current Fundamental Component Containing Harmonic and Inter-Harmonic Components by Subspace Tracking and Fast Recursive Least Square Method
摘要
Abstract
A realtime accurate extraction method for current fundamental component under the background of existing harmonics and inter-harmonics is proposed. Firstly, based on high resolution harmonics tracking algorithm, the high accuracy detection of fundamental frequency of voltage signal is performed; then based on fast recursive least square estimation algorithm the current fundamental component containing harmonic and inter-harmonic components is obtained. High resolution harmonic tracking algorithm is maturely applied in realtime analysis of audio signals, and the subspace tracking and updating can be implemented by fast approximated power iteration algorithm, whose complexity of computation of this algorithm is low. Through analyzing factors impacting tracking stability, the implement method to ensure the computation stable is given, meanwhile, the principles to choose computational parameters such as the order of calculation, the forgetting factors and the gradient step length are given. The fast recursive least square estimation algorithm is simple, converges rapidly and its calculated amount is small. Results of numerical signal analysis and typical measured inter-harmonic signal analysis results provided by IEEE show that based on the given parameter choosing principles, using high resolution harmonic tracking algorithm the fundamental frequency of voltage signal can be detected fast and steadily; using fast recursive least square estimation algorithm, high accuracy current fundamental component can be fast extracted. The proposed method is available for reference to harmonic and inter-harmonic elimination.关键词
间谐波/子空间跟踪/快速逼近幂迭代/快速递归最小二乘/电能质量Key words
interharmonics/subspace tracking/fast approximated power iteration/fast recursive least square/power quality分类
信息技术与安全科学引用本文复制引用
金国彬,李玲,高磊,李天云,赵毅君..应用子空间跟踪和递归最小二乘法的间谐波背景下电流基波分量的实时检测[J].电网技术,2013,(11):3118-3124,7.基金项目
国家863高技术基金项目(2011AA05A119)；湖南省高校产业化培育项目(12CY017) （2011AA05A119）
湖南省教育厅科学研究项目(13C173)；湖南省科技计划项目(2013GK3035)。The National High Technology Research and Development of China(863 Program)(2011AA05A119) （13C173）
