Author: Wong, Wai-kau
Title: Adaptive digital distance protective relaying
Degree: M.Sc.
Year: 1999
Subject: Protective relays
Electric power transmission -- Protection
Hong Kong Polytechnic University -- Dissertations
Department: Department of Electrical Engineering
Pages: ii, 123 leaves : ill. ; 31 cm
Language: English
Abstract: Due to the dynamic characteristic of the power system such as arc resistance, earth fault resistance and mutual coupling effect of parallel lines, the performance of distance relays can vary. These errors are influenced by the actual power system condition. Although accounted for by using a large safety margin in the zone boundaries, unexpected over-reach/under-reach can occur and the operation speed is affected. Adaptive protection offers an approach to compensate for the influence by the variable power system conditions. By adapting the relay settings to the actual power system condition, the relay will respond more accurately to power system faults. The selectivity of the protection system is increased, as well as the power system reliability. This thesis presents the development an adaptive digital distance protection scheme with an adaptive zero sequence compensation factor applied on the finite Fourier Transform Algorithm. Real-time simulation shows that the protective relay possess very high sensitivity and selectivity. The use of a moving average technique further improves the performance.
Rights: All rights reserved
Access: restricted access

Files in This Item:
File Description SizeFormat 
b14854235.pdfFor All Users (off-campus access for PolyU Staff & Students only)2.62 MBAdobe PDFView/Open

Copyright Undertaking

As a bona fide Library user, I declare that:

  1. I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
  2. I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
  3. I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.

By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.

Show full item record

Please use this identifier to cite or link to this item: