一种基于DFT与软件跟踪的相量测量新方法  

A new method for measuring phasor based on DFT and software-tracking

作　　者：李德东[1] 王毅[1] 

机构地区：[1]哈尔滨工业大学深圳研究生院计算机及信息技术学科部,广东深圳518055

出　　处：《继电器》2006年第14期38-41,共4页Relay

摘　　要：通过对当前电力系统中常见的测频方法的分析,指出了这些方法在某些方面的不足。在傅里叶测频算法的基础上提出了一种利用软件来实现跟踪频率的算法,此方法不改变采样率而通过调整数据窗的大小来实现频率跟踪,并通过测得频率修正电力信号的幅值和相位。通过模拟的电力系统信号的仿真结果验证了此方法计算相量精度高,适用频率范围广,实时性好的特点。Based on the analysis of general frequency-measurement methods at present, this paper points out their disadvantages in some aspects, and proposes a new method based on Fourier Algorithm and software-tracking for measuring the frequency of the power system. By adjusting the size of the data window for DFT without changing the sampling rate, the new method can obviously improve the accuracy of phasor-measurement result by modifying the phase and peak value. The simulation results show the method is of highprecision, wide range and quick-response.

关 键 词：相量测量 傅里叶算法 频率跟踪 

分 类 号：TM933.3[电气工程—电力电子与电力传动]