三种跟踪电网频率方法的比较研究  

Investigation on comparison among three methods for tracking frequency of power grids

作　　者：李松岩 贾光辉[2] 陈平[3] 

机构地区：[1]山东电力超高压公司,济南250021 [2]山东大学电气工程学院,济南250061 [3]山东电力工程咨询院,济南250013

出　　处：《电测与仪表》2007年第9期38-41,13,共5页Electrical Measurement & Instrumentation

摘　　要：针对电力信号的几种模型,本文基于三种构造复信号的方法仿真跟踪电网频率。分别仿真了跟踪算法的恒频特性与动态特性,并具体分析了仿真结果,对三种方法进行较为全面的比较。其中对跟踪结果详细分析了跟踪误差和滞后效应的影响因素,以及抗噪性。最后综合跟踪准确度、计算速度、实现难易程度以及抗干扰性等各方面评价因素,指出正交滤波器组法具有较好的跟踪特性,可以较为准确、实时地跟踪各种电力信号的频率,有一定的实用价值。With respect to several power models, this paper based on three different methods to construct complex signals tracks power grids frequency. The constant-frequency and dynamic characteristics are simulated respectively. This paper analyzes the results concretely, and makes more comprehensive comparisons among three methods. The factors influencing tracking errors, lagging effects and noise immunity are analyzed. At last, the paper provides the orthogonal digital filters has better tracking characteristics among the evaluating factors including tracking precision, computing speed, realization and antinoise et al. It can track the frequency of different kinds of power signals more accurately and instantly and has some practical value.

关 键 词：加权平滑相位差分法 正交数字滤波器 HILBERT变换 CLARKE变换 频率测量 

分 类 号：TM761[电气工程—电力系统及自动化]