中国电机工程学报2011，Vol.31Issue(10)：102-108,7.
基于改进希尔伯特-黄变换算法的电力系统低频振荡分析
Researching on Low Frequency Oscillation in Power System Based on Improved HHT Algorithm
杨德昌 1C.Rehtanz 1李勇 1唐巍 2屈瑞谦2
作者信息
- 1. 德国多特蒙德工业大学电力系统与电力经济研究所,德国,多特蒙德,44227
- 2. 中国农业大学信息与电气工程学院,北京市,海淀区,100083
- 折叠
摘要
Abstract
As a non-linear and time-varying signal processing method, Hilbert-Huang transform (HHT) has been widely used to analyze low frequency oscillation signal in power system. The end effects and mode-mixing phenomena in the processing of empirical mode decomposition (EMD) were introduced. Aiming at the end effect phenomenon in processing of EMD, the extension method which is appropriate to deal with low frequency signal was got by comparing four different kinds of extension methods. In order to overcome the mode-mixing problem, the frequency heterodyne technique was proposed based on analysis of its principle and applying condition. And then the improvement HHT was presented based on frequency heterodyne technique and wide area measurement system (WAMS). The results of testing signal and simulation model show that improvement HHT is feasible and effective to overcome special mode- mixing problem and the application of HHT is extended.关键词
电力系统/希尔伯特黄变换/端点延拓/频率偏差法/频差因子/瞬时参数分类
信息技术与安全科学引用本文复制引用
杨德昌,C.Rehtanz,李勇,唐巍,屈瑞谦..基于改进希尔伯特-黄变换算法的电力系统低频振荡分析[J].中国电机工程学报,2011,31(10):102-108,7.
