基于希尔伯特-黄变换的电力系统低频振荡的非线性非平稳分析及其应用  

Hilbert-Huang Transform Based Nonlinear and Non-Stationary Analysis of Power System Low Frequency Oscillation and Its Application

作　　者：韩松[1] 何利铨[1] 孙斌 姜浩 彭小俊 

机构地区：[1]贵州大学电气工程学院,贵州省贵阳市550003 [2]贵州省电力公司调度通信局,贵州省贵阳市550001 [3]贵州省电力试验研究院,贵州省贵阳市550001

出　　处：《电网技术》2008年第4期56-60,共5页Power System Technology

摘　　要：研究了基于希尔伯特–黄变换法从广域测量系统的实测数据中提取电力系统时变振荡特性的一种实用方法。该方法能够分析非线性、非平稳信号的局域动态行为和特性,更好地反映振荡过程中所包含的多个模式随时间的变化规律以及模式间的相互影响,还可提高识别能力和处理效果。在贵州电网的初步实验结果证明了该方法的有效性。Based on Hilbert-Huang transform （HHT）, the authors propose a practical method to extract time-varying oscillation characteristic of power system from the data measured by wide area measurement system （WAMS）. The proposed method can analyze local dynamic behavior and characteristics of nonlinear and non-stationary signals, better reflect the time-varying law of multi modes involved in oscillation process as well as the mutual influences among these modes, and improve the identification ability and processing effect. Preliminary experimental results of Guizhou Power Grid validate the effectiveness of the proposed method.

关 键 词：希尔伯特-黄变换(HHT) 非线性系统 广域测量系统(WAMS) 在线辨识 低频振荡 

分 类 号：TM712[电气工程—电力系统及自动化]