电压暂降分析方法研究  

Study of the Voltage Sag Analysis Methods

作　　者：周林[1] 吴红春[1] 孟婧[1] 徐会亮[1] 马永强[1] 

机构地区：[1]重庆大学高电压与电工新技术教育部重点实验室,重庆400030

出　　处：《高电压技术》2008年第5期1010-1016,共7页High Voltage Engineering

基　　金：重庆市自然科学基金(2006BB6219)~~

摘　　要：电压暂降问题随着敏感电力电子设备的大量应用而显得十分突出,而供电可靠性评价又未纳入暂降指标。为此,简要介绍了电压暂降的基本概念、主要特点和问题现状,详细论述了应用于电压暂降的实测统计法、随机预估法、基于变换域的方法(包括短时傅立叶变换、小波变换、S变换及Hilbert-Huang变换)、瞬时无功功率理论、分形分析方法、数学形态学等各种分析方法的基本原理、主要特点及适用范围,对各种方法作出比较总结后得出了小波变换和S变换这两种方法应用于电压暂降分析时在几种性能指标上取得较好效果的结论,最后指出了电压暂降问题今后的研究方向及工作重点。The basic concept of the voltage sag is introduced and its trait is summed up and analyzed. Also the actuality of the voltage sag is expatiated. In addition, sundry basic principles of the voltage sag and its application, characteristics and applicable range are discussed in details. Moreover, every methods are summarized and compared, and conclusion is drawn that the wavelet-transformation and S-transformation related to other analysis methods of the voltage sag could acquire preferable effect in studying the voltage sag. The analysis direction and emphasis of studying the voltage sag are put forward.

关 键 词：电压暂降 小波变换 短时傅立叶变换 S变换 数学形态学 分析方法 

分 类 号：TM732[电气工程—电力系统及自动化]