电力系统保护与控制2012，Vol.40Issue(7)：60-65,6.
基于广义S变换的暂态电能质量扰动定位与识别
Localization and identification of transient power quality disturbances based on generalized S-transform
摘要
Abstract
S-transform has fixed time-frequency resolution, leading to poor results of localizing transient power quality disturbances. A new method to localize the disturbances is proposed based on generalized S-transform. The method detects mutation peak in the high frequency time-amplitude curve, in order to increase localization accuracy. At first, modulus time-frequency matrix is calculated by generalized S-transform, then the disturbances' start-stop time is localized using the high frequency time-amplitude curve, and four identification features are extracted according to maximum frequency spectrum curve, fundamental frequency amplitude curve and the localization results. At last, automatic classification of disturbance signals is performed by use of a rule-based decision tree. Simulation results show that the proposed localization method is simple and intuitive, with high accuracy. The number of identification features is small and they are effective with good classification results.This work is supported by National Natural Science Foundation of China (No. 51077137).关键词
电能质量/暂态扰动/广义S变换/定位/分类Key words
power quality/ transient disturbances/ generalized S-transform/ localization/ classification分类
信息技术与安全科学引用本文复制引用
刘奇,周雒维,卢伟国..基于广义S变换的暂态电能质量扰动定位与识别[J].电力系统保护与控制,2012,40(7):60-65,6.基金项目
国家自然科学基金(51077137) （51077137）
中央高校基本科研业务费资助(CDJXS11151151) （CDJXS11151151）
