Two digital filtering algorithms for fast estimation of symmetrical components in a power system: a static estimation approach

被引：3
|
作者：
Alammari, RA
Soliman, SA
Mostafa, MA
El-Hawary, ME
机构：
[1] Univ Qatar, Dept Elect Engn, Doha, Qatar
[2] Ain Shams Univ, Elect Power & Machines Dept, Cairo, Egypt
[3] Dalhousie Univ, Dept Elect & Comp Engn, Halifax, NS, Canada
来源：
ELECTRIC POWER SYSTEMS RESEARCH | 2003年 / 66卷 / 02期
关键词：
digital filter; symmetrical component; least errors square; power system protection and control;
D O I：
10.1016/S0378-7796(03)00014-2
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper presents the application of two digital filters working together for fast estimation of power systems symmetrical components. The three-phase unbalanced system is transformed to two phases using a-p-transformation. Using such a transformation, harmonics of order 3 and their multiples, in the input signal, are suppressed. Having identified the two-phase voltages, the positive and negative sequence phase voltage can be calculated using a constant transformation matrix. The zero sequence component is easily estimated by averaging the unbalanced three-phase voltage at every sample instant. Least error square algorithm is used to identify the magnitude and phase angle of sequence components from the available samples of the specified component. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：133 / 137
页数：5
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