摘要
小波变换作为一种新兴的理论已经在许多领域得到广泛应用，鉴于其良好的时频特性，有些文献把其应用于电力系统暂态谐波检测。文中通过分析小波函数的频域特性，阐明了将其应用于谐波检测时产生误差的根本原因，最后总结了几种典型小波的频域特性，指出现有的小波均无法实现谐波的精确测量，必须构造频城行为良好即分频严格、能量集中的小波函数，以改善检测的精度。
Wavelet transform. as a rising theory. has been applied to many fields and used for studying power systemtransient harrnonic detection due to its excellent time-frequency characteristic. Through analyzing the frequency dornaincharacteristics of the wavelet functions used in reference [3. 4] for detecting harmonics. the author points out that thedetection errors are unavoidable. For detecting the content of different harmonics. it is necessary to construct new waveletfunctions with strict frequency division and energy centralization for precisely measuring.
出处
《电力系统自动化》
EI
CSCD
北大核心
1998年第7期40-43,共4页
Automation of Electric Power Systems
关键词
谐波检测
小波变换
电力系统
频域特性
harmonics detection wavelet transform power system frequency domain characteristic
