线性调频Z变换在电力谐波分析中的应用  

Chirp-z Transform and its Applicationsin in Power System Harmonic Analysis

作　　者：李华[1] 李尚柏[1] 周维[1] 郑高群[1] 

机构地区：[1]四川大学原子核科学技术研究所,辐射物理及技术教育部重点实验,成都610064

出　　处：《电测与仪表》2005年第3期1-5,共5页Electrical Measurement & Instrumentation

摘　　要：讨论了线性调频Z变换及基于FFT的布鲁斯坦(Bluestein)算法。该算法适用任意长度采样序列,而并非一定要求基2的长度。拟分析的频段及频域抽样率也可根据需要设置,它特别适合用来实现高分辨局部频谱快速分析。在此基础上提出了一种实序列重组Z变换算法,该算法可以通过一次变换快速求解电力系统三相电流谐波谱。Chirp-z transform and Bluestein FFT algorithm are discussed. The algorithm will apply to any signal sequential length and is not necessarily radix 2 based. While its bandwidth of spectrum being analyzed and the frequency sampling rate can be adjusted to meet different requirements. So it is best suitable for fast spectrum analysis with selected bandwidth and adjustable high resolution. A new chirp-z algorithm for packed real signal spectrum analysis is derived to solve power system harmonics of three-phase current with only one transformation.

关 键 词：线性调频Z变换 局部频谱分析 重组算法 电力谐波 

分 类 号：TM935.24[电气工程—电力电子与电力传动]