Design and Simulation of Differential Protective Relay (DPR) to 33/11kv Delta-Wye Transformer Using Saber Software Simulator

Substation automation constitutes the integral part of distribution automation. An automated distribution system may require many remote and central intelligent controllers or computers running synchronously in a very large boundary that are capable of making decisions and performing control actions...

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Main Author:	Othman, Muhammad Murtadha
Format:	Thesis
Language:	English English
Published:	2000
Subjects:	SaberBASIC (Computer program language) Differential relays
Online Access:	http://psasir.upm.edu.my/id/eprint/10490/1/FK_2000_25.pdf
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id	my-upm-ir.10490
record_format	uketd_dc
spelling	my-upm-ir.104902024-04-02T08:16:23Z Design and Simulation of Differential Protective Relay (DPR) to 33/11kv Delta-Wye Transformer Using Saber Software Simulator 2000-09 Othman, Muhammad Murtadha Substation automation constitutes the integral part of distribution automation. An automated distribution system may require many remote and central intelligent controllers or computers running synchronously in a very large boundary that are capable of making decisions and performing control actions. A protective relay is a device that responds to abnormal conditions in an electrical power system to operate a circuit breaker to disconnect the faulty section of the system with the minimum interruption of supply. Reliability, speed and selectivity are the most desirable characteristics of a protective relay. Numerical relays play an essential role in various distribution automation functions, and instead of mere protection relays it is also able to interact with the other instruments. In most utilities, power transformers often represent the expensive and also the largest capital purchase in the transmission and distribution system. The gas relay or bucholz relays is particularly important since it gives early warning of a slowly developing fault, permitting shutdown and repair before serious damage can occur. For short-circuit condition or internal faults, differential protective relays (DPR) are usually employed. In this project, SABER software simulator was used to implement solid-state digital-type components for the DPR. The project focused on the protection of 33/11 kv delta-wye transformer when internal fault happens. 3 packages solid-state digital-type DPR were designed to protect delta-wye transformer when internal fault happens. There are several problems encountered in this project where in SABER, 1) it is difficult to configure an initial values for delta-wye transformer due to obtain a desired outputs on wye-side, 2) 3-phase generator cannot do any partial changes either leading or lagging power factor, and 3) during circuit breakers switching, very high surges appear which can cause destruction to the power system components. Hence to reduce surges below the allowable maximum value during switching, this can be solve by implementing circuit breakers that not only works as a switch but also as impedance. Circuit breakers impedance can also be assume as an arc extinguisher. By extinguish the arc, the surges also will be reduce. Hence the results of this project are not only to isolate the delta-wye transformer from the generator and as well loads when fault happened, but is also capable to reduce surges during circuit breakers switching. SaberBASIC (Computer program language) Differential relays 2000-09 Thesis http://psasir.upm.edu.my/id/eprint/10490/ http://psasir.upm.edu.my/id/eprint/10490/1/FK_2000_25.pdf text en public masters Universiti Putra Malaysia SaberBASIC (Computer program language) Differential relays Faculty of Engineering Mariun, Norman English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
advisor	Mariun, Norman
topic	SaberBASIC (Computer program language) Differential relays
spellingShingle	SaberBASIC (Computer program language) Differential relays Othman, Muhammad Murtadha Design and Simulation of Differential Protective Relay (DPR) to 33/11kv Delta-Wye Transformer Using Saber Software Simulator
description	Substation automation constitutes the integral part of distribution automation. An automated distribution system may require many remote and central intelligent controllers or computers running synchronously in a very large boundary that are capable of making decisions and performing control actions. A protective relay is a device that responds to abnormal conditions in an electrical power system to operate a circuit breaker to disconnect the faulty section of the system with the minimum interruption of supply. Reliability, speed and selectivity are the most desirable characteristics of a protective relay. Numerical relays play an essential role in various distribution automation functions, and instead of mere protection relays it is also able to interact with the other instruments. In most utilities, power transformers often represent the expensive and also the largest capital purchase in the transmission and distribution system. The gas relay or bucholz relays is particularly important since it gives early warning of a slowly developing fault, permitting shutdown and repair before serious damage can occur. For short-circuit condition or internal faults, differential protective relays (DPR) are usually employed. In this project, SABER software simulator was used to implement solid-state digital-type components for the DPR. The project focused on the protection of 33/11 kv delta-wye transformer when internal fault happens. 3 packages solid-state digital-type DPR were designed to protect delta-wye transformer when internal fault happens. There are several problems encountered in this project where in SABER, 1) it is difficult to configure an initial values for delta-wye transformer due to obtain a desired outputs on wye-side, 2) 3-phase generator cannot do any partial changes either leading or lagging power factor, and 3) during circuit breakers switching, very high surges appear which can cause destruction to the power system components. Hence to reduce surges below the allowable maximum value during switching, this can be solve by implementing circuit breakers that not only works as a switch but also as impedance. Circuit breakers impedance can also be assume as an arc extinguisher. By extinguish the arc, the surges also will be reduce. Hence the results of this project are not only to isolate the delta-wye transformer from the generator and as well loads when fault happened, but is also capable to reduce surges during circuit breakers switching.
format	Thesis
qualification_level	Master's degree
author	Othman, Muhammad Murtadha
author_facet	Othman, Muhammad Murtadha
author_sort	Othman, Muhammad Murtadha
title	Design and Simulation of Differential Protective Relay (DPR) to 33/11kv Delta-Wye Transformer Using Saber Software Simulator
title_short	Design and Simulation of Differential Protective Relay (DPR) to 33/11kv Delta-Wye Transformer Using Saber Software Simulator
title_full	Design and Simulation of Differential Protective Relay (DPR) to 33/11kv Delta-Wye Transformer Using Saber Software Simulator
title_fullStr	Design and Simulation of Differential Protective Relay (DPR) to 33/11kv Delta-Wye Transformer Using Saber Software Simulator
title_full_unstemmed	Design and Simulation of Differential Protective Relay (DPR) to 33/11kv Delta-Wye Transformer Using Saber Software Simulator
title_sort	design and simulation of differential protective relay (dpr) to 33/11kv delta-wye transformer using saber software simulator
granting_institution	Universiti Putra Malaysia
granting_department	Faculty of Engineering
publishDate	2000
url	http://psasir.upm.edu.my/id/eprint/10490/1/FK_2000_25.pdf
_version_	1804888551961133056

Design and Simulation of Differential Protective Relay (DPR) to 33/11kv Delta-Wye Transformer Using Saber Software Simulator

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