摘要
暂态电能质量扰动是目前电能质量研究中的主要问题之一,如何快速、准确定位电力系统中暂态电能质量扰动是一件复杂而有意义的工作。文中从时域出发,提出一种Hilbert变换和后差分相结合的方法,快速定位暂态电能质量扰动。该方法首先利用Hilbert变换提取暂态电能质量扰动信号的包络,然后采用后差分定位扰动信号。实验结果及分析表明,该方法简单、快速、准确,适合实时性要求较强的场合。
Transient disturbances are often encountered in the field of power quality research. It is something of significance to quickly and accurately locate these disturbances. This paper presents a method for locating transient disturbances by means of Hilbert transform combined with backward difference in the time domain. The envelope of the disturbance signal is detected via Hilbert transform, then the disturbance signal is located by using backward difference. The experimental results and the performance analysis show that the method possesses the merits of simplicity, speediness and accuracy, and meets the requirement of the real-time eases.
出处
《电力系统自动化》
EI
CSCD
北大核心
2007年第12期73-76,共4页
Automation of Electric Power Systems
基金
安徽省高等学校自然科学研究重点项目(2005KJ005ZD)~~
关键词
电能质量
暂态扰动
HILBERT变换
后差分
power quality
transient disturbances
Hilbert transform
backward difference
