دراسة أثر الإشباع المغناطيسي في محولات التيار على أداء حماية زيادة التيار الرقمية

Authors

  • طارق إبراهيم
  • تمام حيدر
  • فراس محفوض

Abstract

يعرض هذا البحث تأثير إشباع محولات التيار على أداء ريليهات زيادة التيار الرقمية, وذلك من خلال استخدام موجات تيارات لأعطال حقيقية حدثت في الشبكة الكهربائية لمصفاة بانياس. تبين الدراسة التحليلية التي أجريت باستخدام برنامج EMTP-ATP وبرنامج ماتلاب، أن الإشباع المغناطيسي يؤدي إلى انخفاض المطال لتيار العطل، وهذا بدوره يؤدي إلى عدم عمل حماية زيادة التيار وقيامها بفصل الجزء المعطوب.

بهدف التصدي لهذه المشكلة تمت دراسة خوارزميات مختلفة لتصحيح التشوه الحاصل في موجة تيار العطل والناتج عن الإشباع المغناطيسي في محولات التيار، ومن ثم استخدام خوارزمية للكشف والتصحيح. جرى التحقق من جودة أدائها باستخدام موجات تيارات الأعطال الحقيقية في المصفاة وكذلك تيارات تم الحصول عليها من نتائج الدراسة المنفذة باستخدام برنامج EMTP-ATP.

This paper investigates the transient behavior of CTs and its effect on numerical overcurrent relays during high fault level. The operation principles of all microprocessor-based relays are almost identical, although they utilize different filtering techniques.

The effects of CT saturation on microprocessor-based overcurrent relays are evaluated by implementing different fault scenarios (saturated waves), as input for the relay to analyze the transient behavior of microprocessor-based overcurrent relays due to the saturation of current transformer.

Current transformer (CT) saturation may cause mal-operation or operating time delay of protection relays. In this paper, a new algorithm for the compensation of the distorted secondary current due to CT saturation is suggested. Simulation results indicate that the algorithm can efficiently detect and correct each saturation period when the secondary current is severely distorted.

NOMENCLATURE:

CT(s): Current Transformer(s).

EMTP: Electromagnetic Transient Program.

ATP: Alternative Transient Program.

Downloads

Published

2019-01-30

How to Cite

1.
إبراهيم ط, حيدر ت, محفوض ف. دراسة أثر الإشباع المغناطيسي في محولات التيار على أداء حماية زيادة التيار الرقمية. Tuj-eng [Internet]. 2019Jan.30 [cited 2024Apr.28];33(2). Available from: https://journal.tishreen.edu.sy/index.php/engscnc/article/view/7291

Issue

Vol. 33 No. 2 (2011): العلوم الهندسية

Section

Articles

License

Copyright (c) 2019 ttps://creativecommons.org/licenses/by-nc-sa/4.0/

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

The authors retain the copyright and grant the right to publish in the magazine for the first time with the transfer of the commercial right to Tishreen University Journal for Research and Scientific Studies - Engineering Sciences Series

 Under a CC BY- NC-SA 04 license that allows others to share the work with of the work's authorship and initial publication in this journal. Authors can use a copy of their articles in their scientific activity, and on their scientific websites, provided that the place of publication is indicted in  Tishreen University Journal for Research and Scientific Studies - Engineering Sciences Series   .  The Readers have the right to send, print and subscribe to the initial version of the article, and the title of  Tishreen University Journal for Research and Scientific Studies - Engineering Sciences Series     Publisher

journal uses a CC BY-NC-SA license which mean

You are free to:

  • Adapt — remix, transform, and build upon the material
  •  
  • The licensor cannot revoke these freedoms as long as you follow the license terms.

 

  • Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
  • NonCommercial — You may not use the material for commercial purposes.
  • ShareAlike — If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.
  • No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.