电力系统保护与控制2011，Vol.39Issue(12)：79-83,5.
一种基于d-q-0坐标变换的频率测量算法
A frequency measuring algorithm based on d-q-0 transformation
摘要
Abstract
The traditional discrete Fourier transform based algorithm or the improved algorithm requires large quantity of data, and has complex computation, and poor dynamic performance, which is not easy to realize.A frequency detection algorithm based on three-phase power grid is proposed in this paper.This algorithm uses generalized d-q-0 transformation to transform the three-phase power into the d-q-0 stationary frame.Then each of the d-axis component and q-axis component is sent to a low-pass digital filter to get fundamental component.Through calculation of filtered fundamental component, the grid frequency could be obtained.There are lots of advantages of the algorithm, such as less of required data, easy to calculate and no consideration of initial phase angle.Matlab simulation shows that the algorithm is simple, easy to implement and able to fast track the system frequency with high precision.关键词
d-q-0变换/频率测量/低通数字滤波/电力系统/频率变换Key words
d-q-0 transformation/ frequency measuring/ low-pass digital filter/ power system/ frequency change分类
信息技术与安全科学引用本文复制引用
印海文,牟龙华..一种基于d-q-0坐标变换的频率测量算法[J].电力系统保护与控制,2011,39(12):79-83,5.
