摘要
本文从三个方面讨论数字保护中常用的一般性算法。首先从抑制衰减直流误差出发,研究了FIR滤波器的频域特性和时域特性要求,提出了三种整系数滤波器。其次探讨瞬时采橛值快速滤序算法.所述两种算法在减小计算量和直接相量输出两方而各有侧重。最后介绍利用相量实虚部计算幅值的近似算法和在三相对称系统中利用当前采样值的幅值平方算法。这些逄法首重考虑了实用性和使用者的不同要求.
Three subjects about general algorithms often using in digital protections are discussed in this paper.
The first subject is on investigating the requirements of frequency-domain characteristies and time-do
main characteristies and time-domain features for FIR digital filters based on the consideration of re
straining the error produced by a decaying de component, and three kinds of integer digital filters are
suggested. The sceond subject is on seeking out high spced dignals, sequence filters with samples of input
instantancou signals and two of these algorithms presented have advantages of very small computing load
and dircetly available phasor outputs respectively. Last subject is relerred to finding out the square of
magnitude from current instantancous samples in a three--phase symmetrical system, and the approxi-
mate magnitude of a complex. All of these algorithms are designed so as to be used in practical digital
proteetions and satisfy users' different requirements.
出处
《电力系统及其自动化学报》
CSCD
1991年第1期75-81,59,共8页
Proceedings of the CSU-EPSA
关键词
数字保护算法
整数FIR滤波器
滤序器
相量幅值
Digital protection algorithms
Integer FIR filters
Sequence filters
Magnitudes of phasors.
