电力系统及其自动化学报2019，Vol.31Issue(2)：14-18,31,6.DOI:10.3969/j.issn.1003-8930.2019.02.003
加窗插值FFT与ESPRIT结合方法的动态负荷电能计量
Combined Method of Windowed Interpolation FFT and ESPRIT for Dynamic Load Power Metering
摘要
Abstract
Considering that the windowed interpolation fast Fourier transform(FFT)method leads to larger errors in the estimation of harmonic parameters in dynamic and impact load power metering,a combined method of windowed inter?polation FFT and estimation of signal parameters via rotational invariance techniques(ESPRIT)is proposed in this pa?per. The windowed interpolation FFT applies a 10-cycle time window to analyze the signal with a slowly changing ampli?tude,while the ESPRIT method uses 2-cycle time-window high-precision harmonic parameter estimation method for the analysis of amplitude-fast signals. Simulation results show that the measurement precision of impact signal power meter?ing calculated by the combined method is about 10 times higher than that calculated by the windowed interpolation FFT;the combined method is applicable to dynamic and impact load power metering.关键词
动态信号/电能计量/加窗插值快速傅里叶变换(FFT)/ESPRIT算法/冲击负荷Key words
dynamic signal/electric power metering/windowed interpolation fast Fourier transform(FFT)/ESPRIT al⁃gorithm/impact load分类
信息技术与安全科学引用本文复制引用
陈文礼,何蓓,郑可,张淮清..加窗插值FFT与ESPRIT结合方法的动态负荷电能计量[J].电力系统及其自动化学报,2019,31(2):14-18,31,6.基金项目
国家重点研发项目资助课题(2017YFB0902900,2017YFB0902902) （2017YFB0902900,2017YFB0902902）
南方电网有限责任公司科技资助项目(WYKJ00000020) （WYKJ00000020）
