基于FFT算法的交流电器选相分合闸技术  

Technology of Phase Selection of AC Apparatus Based on FFT

作　　者：杜太行[1] 陈培颖[1] 弭艳芝[1] 刘鑫[1] 

机构地区：[1]河北工业大学电气与自动化学院,天津300130

出　　处：《电工技术学报》2003年第6期80-83,87,共5页Transactions of China Electrotechnical Society

摘　　要：阐述一种基于快速傅里叶变换 (FFT)的交流电器选相分合闸技术的原理及实现方法 ,能够较精确地计算电网电压的实际频率和相位 ,提高了移相延时时间测算的准确度。算法抗干扰性强 。The technology of phase selection always involves not only the detection of signal frequency,signal phase and power factor but also calculation and control of phase.And now electronic circuit used widely in phase selection devices realizes these functions.But there are some problems in the aspects of economy and reliability,even if using CPU,if may bring the problems of calculation methods.This paper expatiates on how to use Fast Fourier Transform Algorithm(FFT) to calculate signal frequency,signal phase,power factor.At the same time it also introduces the theory and realization method of phase selection.The phase selection device,which based on the technology mentioned above and single chip computer,is given at the last of the paper.This device used in the test equipment of the breakers can eliminate transient current in the experiment.

关 键 词：快速傅里叶变换 选相分合闸 断路器瞬动特性 单片机 

分 类 号：TM77[电气工程—电力系统及自动化]