一种电网谐波与间谐波分析新方法  

A Novel Power System Harmonic and Interharmonic Analysis Method

作　　者：黄纯[1] 朱智军[1] 曹一家[1] 汪沨[1] 黎灿兵[1] 董旭柱 

机构地区：[1]湖南大学电气与信息工程学院,长沙410082 [2]南方电网科学研究院有限责任公司,广州510080

出　　处：《电工技术学报》2013年第9期32-39,共8页Transactions of China Electrotechnical Society

基　　金：国家高技术研究发展计划(863计划)(2011AA05A114)资助项目

摘　　要：提出了一种分析电力系统谐波与间谐波的新方法。利用信号TT变换的对角线元素的频谱特性,结合加窗插值方法,提出了稳态谐波、间谐波参数的高精度测量算法,解决电网中高频谐波及间谐波含量小、难以检测的问题。针对动态谐波和间谐波,利用TT变换对角线元素谱分析,估计信号各频率分量的频率、幅值等参数,然后基于对S变换结果的分析和TT序列突变量的检测,精确确定各频率分量出现的起止时刻。仿真结果说明了所提方法在稳态、动态谐波及间谐波分析中的可行性和有效性。This paper presents a novel power system harmonic and interharmonic analysis method based on S-transform and TT-transform. By using the spectral properties of diagonal elements of TT-transform and interpolation algorithm, the paper proposes a high precision measurement algorithm to detect steady harmonics and interharmonic~, and solves the problem that the high frequency harmonics and interharmonics in power system is too less to detect. For dynamic harmonic and interharmonic analysis, the paper uses spectral analysis of diagonal elements of TT-transform to calculate frequency, amplitude and other parameters of each frequency component in signal, and accurately determines the beginning and ending time of each frequency component by analyzing the result of S-transform and detecting the amount of mutation of TT-series. Simulation results verify the feasibility and effectiveness of the proposed method in steady, dynamic harmonic and interharmonic analysis.

关 键 词：谐波检测 S变换 TT变换 对角线元素 时频分析 

分 类 号：TM935[电气工程—电力电子与电力传动]