电力系统自动化Issue(8)：126-132,7.DOI:10.7500/AEPS20140213003
基于窄带滤波器和变长数据窗的相量提取算法
A Phasor Calculation Algorithm Based on Narrow Band-pass Filter and Variable Data-window
摘要
Abstract
In order to meet smart substation new demands on phasor extraction algorithm for completely digital relays in face of the poor filtering performance of the short-window algorithm and Fourier algorithm”s long time-delay and fixed data-window,a phasor extracting algorithm with narrow band-pass digital filter (NBDF) and variable data-window combined is proposed. Primarily,the NBDF filters the original sequence of sampled values,with the initial values of NBDF estimated by the short-window algorithm to reduce the impact of NBDF”s transient process and shorten the filter”s time-delay.Then the variable data-window algorithm based on least squares method is applied to the output sequence of NBDF.As a result,the phasor magnitude and phase are acquired.The new algorithm that takes into full account the characteristics of the smart substation mentioned above realizes the phasor extraction of variable data-window,increasing the phasor extracting speed while ensuring filtering precision.Digital simulation and verification by record data show that the proposed algorithm is capable of accurately extracting the fundamental phasor,improving the rapidity and adaptability of completely digital relays in smart substations.关键词
智能变电站/全数字化保护/窄带滤波器/变长数据窗/相量提取Key words
smart substation/completely digital relays/narrow band-pass filter/variable data-window/phasor calculation引用本文复制引用
刘益青,高伟聪,高厚磊,董金海,王立明..基于窄带滤波器和变长数据窗的相量提取算法[J].电力系统自动化,2015,(8):126-132,7.基金项目
山东省自然科学基金资助项目(ZR2014EEM039) （ZR2014EEM039）
济南大学博士科研启动基金资助项目(XBS1408)。This work is supported by Shandong Provincial Natural Science Foundation of China(No.ZR2014EEM039)and Doctoral Scientific Research Foundation of University of Jinan(No.XBS1408) （XBS1408）
