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Determination Of Correction Factor For Differential Relay Setting On Distribution Transformer Protection System Under Harmonic Condition

In this thesis a new method is implemented to overcome the miss-operation problem of differential relay for distribution power transformer operates under harmonic condition. Correction factor as a new method to overcome this problem is introduced and implemented for the relay setting, so that the re...

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Main Author: Nisja, Indra
Format: Thesis
Language:English
Published: 2013
Subjects:
TK1-9971 Electrical engineering. Electronics. Nuclear engineering
Online Access:http://eprints.usm.my/43507/1/Indra%20Nisja24.pdf
http://eprints.usm.my/43507/
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spelling my.usm.eprints.43507 http://eprints.usm.my/43507/ Determination Of Correction Factor For Differential Relay Setting On Distribution Transformer Protection System Under Harmonic Condition Nisja, Indra TK1-9971 Electrical engineering. Electronics. Nuclear engineering In this thesis a new method is implemented to overcome the miss-operation problem of differential relay for distribution power transformer operates under harmonic condition. Correction factor as a new method to overcome this problem is introduced and implemented for the relay setting, so that the relay works properly even though operates under harmonic conditions. In order to determine the correction factor, the effects of harmonics to all components error has been obtained through laboratory test. The tests have been conducted to determine the errors that occur in power transformers and CT when operating under harmonic condition. From the error obtained, the differential current error flow through the relays was defined and differential relay setting was also determined. Experimental results for THDi ranging from 4.6% to 40.88% show that the maximum errors occurred on CT at secondary power transformers is found to be 27.21% and CT at primary power transformers is 10.12%. The maximum error occurred at power transformer found to be 8.57%. For the same THDi the correction factor which was implemented is 30.14. A relationship between THDi and differential relay setting has been established through the differential current error occurred caused by harmonic currents. Correction factor method has able to overcome the miss-operation problem of differential relay for distribution power transformer up to 40% THDi. 2013-11 Thesis NonPeerReviewed application/pdf en http://eprints.usm.my/43507/1/Indra%20Nisja24.pdf Nisja, Indra (2013) Determination Of Correction Factor For Differential Relay Setting On Distribution Transformer Protection System Under Harmonic Condition. PhD thesis, Universiti Sains Malaysia.
institution Universiti Sains Malaysia
building Hamzah Sendut Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Sains Malaysia
content_source USM Institutional Repository
url_provider http://eprints.usm.my/
language English
topic TK1-9971 Electrical engineering. Electronics. Nuclear engineering
spellingShingle TK1-9971 Electrical engineering. Electronics. Nuclear engineering
Nisja, Indra
Determination Of Correction Factor For Differential Relay Setting On Distribution Transformer Protection System Under Harmonic Condition
description In this thesis a new method is implemented to overcome the miss-operation problem of differential relay for distribution power transformer operates under harmonic condition. Correction factor as a new method to overcome this problem is introduced and implemented for the relay setting, so that the relay works properly even though operates under harmonic conditions. In order to determine the correction factor, the effects of harmonics to all components error has been obtained through laboratory test. The tests have been conducted to determine the errors that occur in power transformers and CT when operating under harmonic condition. From the error obtained, the differential current error flow through the relays was defined and differential relay setting was also determined. Experimental results for THDi ranging from 4.6% to 40.88% show that the maximum errors occurred on CT at secondary power transformers is found to be 27.21% and CT at primary power transformers is 10.12%. The maximum error occurred at power transformer found to be 8.57%. For the same THDi the correction factor which was implemented is 30.14. A relationship between THDi and differential relay setting has been established through the differential current error occurred caused by harmonic currents. Correction factor method has able to overcome the miss-operation problem of differential relay for distribution power transformer up to 40% THDi.
format Thesis
author Nisja, Indra
author_facet Nisja, Indra
author_sort Nisja, Indra
title Determination Of Correction Factor For Differential Relay Setting On Distribution Transformer Protection System Under Harmonic Condition
title_short Determination Of Correction Factor For Differential Relay Setting On Distribution Transformer Protection System Under Harmonic Condition
title_full Determination Of Correction Factor For Differential Relay Setting On Distribution Transformer Protection System Under Harmonic Condition
title_fullStr Determination Of Correction Factor For Differential Relay Setting On Distribution Transformer Protection System Under Harmonic Condition
title_full_unstemmed Determination Of Correction Factor For Differential Relay Setting On Distribution Transformer Protection System Under Harmonic Condition
title_sort determination of correction factor for differential relay setting on distribution transformer protection system under harmonic condition
publishDate 2013
url http://eprints.usm.my/43507/1/Indra%20Nisja24.pdf
http://eprints.usm.my/43507/
_version_ 1643710762018930688
score 13.211869

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