Capacitive Voltage Transformer Monitoring and Failure Mode Analysis

Viero, Morgan (2019) Capacitive Voltage Transformer Monitoring and Failure Mode Analysis. [USQ Project]

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A Capacitive Voltage Transformer (CVT) is used in power distribution and transmission networks to transform the system operating high voltage to a low voltage signal which is an accurate representation of this operating voltage. This transformed voltage is used by protection and metering equipment.

After an explosive catastrophic failure of a 145kV CVT in 2013, multiple forms of CVT health monitoring systems have been implemented throughout the Ergon Energy network. Recently a common form of online health monitoring has been discontinued, this along with a drive in Safety In Design (SID) has pushed a review into what is adequate CVT monitoring.

This project investigates the common failure modes of CVTs while also analysing previous failures withinn the Ergon Energy network. The forms of monitoring the health and detecting these CVT failure modes have been investigated and detailed. The most common and most catastrophic failure mode and the subsequent monitoring methods became the major focus of this project.

An assessment and testing of each monitoring method was carried out where the results gave a recommendation of which to use for a particular CVT model and installation site.

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Item Type: USQ Project
Item Status: Live Archive
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 Jul 2013 - 31 Dec 2021)
Supervisors: Hampson, Gordon
Qualification: Bachelor of Engineering (Honours) (Power)
Date Deposited: 18 Aug 2021 03:51
Last Modified: 27 Jun 2023 04:10

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