电力系统保护与控制Issue(21)：47-53,7.
HF-EMD频率选取原则及在暂态扰动检测中的应用
Frequency selection principle of HF-EMD and its application in transient disturbance detection
摘要
Abstract
Modal aliasing problem exists in empirical mode decomposition for the decomposition of transient power quality disturbances, and high-frequency harmonic injection based EMD (HF-EMD) is a simple and efficient method to improve it. The effectiveness of this method depends on the selection of the frequency of the high-frequency harmonic, and there is no effective frequency selection principle. Focusing on this problem, this paper conducts a systematic study, and through theoretical analysis and simulation test, a concrete and effective selection principle is presented. That is to say, when the injected frequencies are in the range from the smallest frequency of the original signal’s high-frequency components to adding a 1/2 times fundamental frequency of the smallest frequency, HF-EMD shows general validity. The analysis of power quality signals simulated by PSCAD and the actual complex disturbance signals of substation shows that this principle is efficient and universal. The detection accuracy of transient power quality disturbances can be effectively improved.关键词
电能质量检测/经验模态分解/模态混叠/高频谐波注入法/频率选取原则Key words
power quality detection/EMD/modal aliasing/high-frequency harmonic injection/frequency selection principle分类
信息技术与安全科学引用本文复制引用
崔艳,刘志刚,戴晨曦..HF-EMD频率选取原则及在暂态扰动检测中的应用[J].电力系统保护与控制,2014,(21):47-53,7.基金项目
国家自然科学基金(U1134205,51377136) （U1134205,51377136）
