一种新颖的频率跟踪算法  

A NOVEL FREQUENCY TRACKING ALGORITHM

作　　者：吴笃贵 贺春 易永辉 

机构地区：[1]许继日立电气有限公司,河南省许昌市461000

出　　处：《电网技术》2004年第14期39-43,共5页Power System Technology

摘　　要：频率跟踪是防止保护装置误动的一项重要措施。文章首先推导了采样频率失配条件下傅立叶变换的基本公式,并通过对变换结果的分析提出了一种新颖的频率跟踪算法。然后,描述了实施该算法的基本步骤,并介绍了实施算法过程中两种数字滤波器的特性与设计方法。最后,利用一个具体算例验证了本文算法的有效性。Frequency tracking is an important measure to avoid the misoperation of protective relaying. Here, at first the basic formulae of Fourier transform under the sampling frequency mismatch are deduced. Through the analysis on the transform results a novel frequency tracking algorithm is presented. Then the main implementation procedures of the presented algorithm are described, the characteristics and design approach of two digital filters during the implementa-tion are given. The effectiveness of the presented algorithm is verified by a practical calculation example.

关 键 词：电力系统 微机型继电保护装置 频率跟踪算法 数字滤波器 

分 类 号：TM774[电气工程—电力系统及自动化]