Online algorithm for removal of decaying DC-offset from fault currents

被引：25

作者：

Al-Tallaq, Kamel N. A. ^{[1
]}

Al-Sharai, H. D. ^{[1
]}

El-Hawary, M. E. ^{[2
]}

机构：

[1] AlJouf Univ, Dept Elect Engn, Al Jouf, Saudi Arabia

[2] Dalhousie Univ, Dept Elect & Comp Engn, Halifax, NS, Canada

来源：

ELECTRIC POWER SYSTEMS RESEARCH | 2011年 / 81卷 / 07期

关键词：

Decaying DC offset; Fault currents; Impedance relays; Fundamental frequency component;

D O I：

10.1016/j.epsr.2011.03.019

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 an efficient method for removing exponentially decaying DC offset from fault currents. Instantaneous value of the actual exponentially decaying DC offset is calculated by integrating the input signal. The DC component is removed by subtracting the DC value at each sampling instant. The Discrete Fourier Transform (DFT) is applied to the result to extract the phasor of the fundamental component. Different transient signals are investigated. The results show that the proposed method is accurate and easy to implement. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：1627 / 1629

页数：3

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