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Setup and preliminary results of a Pilot On-line cable PD monitoring system on an 11 kV Switchboard using capacitive couplers

Setup and preliminary results of a Pilot On-line cable PD monitoring system on an 11 kV Switchboard using capacitive couplers
Setup and preliminary results of a Pilot On-line cable PD monitoring system on an 11 kV Switchboard using capacitive couplers
In today’s competitive power transmission and distribution (T&D) industry the need for predictive and scheduled maintenance of the infrastructure has become a vital necessity. On-line condition monitoring of underground cables and switchboards for the dominant failure mechanism of Partial Discharge (PD) has been in use for some time now. It has been shown that on-line measurements for monitoring the activity and the degradation severity of the PD can not be calibrated in terms of their charge (pC). Although the direct interpretation of the measured voltage gives some indication, for more profound results specific locations have to be monitored over time to record the evolution of the amplitude and/or phase shift (trending). For these reasons a pilot on-line cable monitoring system is currently being implemented in a substation of the Electricity Authority of Cyprus (EAC) on selected breakers of the 11 kV switchboard. This system will alleviate the need for the physical presence of expert personnel on site, as measurements from sensors that will be non-invasively installed will automatically be recorded and processed on a continuous basis thus allowing potential dangerous PD events to be captured. Furthermore, the proposed system will implement permanent capacitive couplers that offer better sensitivity compared to other sensors. In this paper the setup and calibration of these sensors, together with some preliminary results will be presented.
CD-ROM
Evagorou, D
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Kyprianou, A
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Stavrou, A
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Efthymiou, V
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Lewin, P L
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Georghiou, G E
c3e9a8c7-a175-4d3c-aa20-e851d441c30d
Evagorou, D
f21ff092-4633-4728-aab0-521dd297a187
Kyprianou, A
3ce6d975-3c30-4a93-9d08-59fa5dc00c36
Stavrou, A
88f5bae6-fb3e-4c97-8acc-6a19508e8807
Efthymiou, V
ed0d632d-ebe4-45d9-9a05-96516f8d56ff
Lewin, P L
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Georghiou, G E
c3e9a8c7-a175-4d3c-aa20-e851d441c30d

Evagorou, D, Kyprianou, A, Stavrou, A, Efthymiou, V, Lewin, P L and Georghiou, G E (2010) Setup and preliminary results of a Pilot On-line cable PD monitoring system on an 11 kV Switchboard using capacitive couplers. 7th Mediterranean Conference on Power Generation, Transmission, Distribution and Energy Conversion, Agia Napa, Cyprus. 08 - 10 Nov 2010. CD-ROM .

Record type: Conference or Workshop Item (Paper)

Abstract

In today’s competitive power transmission and distribution (T&D) industry the need for predictive and scheduled maintenance of the infrastructure has become a vital necessity. On-line condition monitoring of underground cables and switchboards for the dominant failure mechanism of Partial Discharge (PD) has been in use for some time now. It has been shown that on-line measurements for monitoring the activity and the degradation severity of the PD can not be calibrated in terms of their charge (pC). Although the direct interpretation of the measured voltage gives some indication, for more profound results specific locations have to be monitored over time to record the evolution of the amplitude and/or phase shift (trending). For these reasons a pilot on-line cable monitoring system is currently being implemented in a substation of the Electricity Authority of Cyprus (EAC) on selected breakers of the 11 kV switchboard. This system will alleviate the need for the physical presence of expert personnel on site, as measurements from sensors that will be non-invasively installed will automatically be recorded and processed on a continuous basis thus allowing potential dangerous PD events to be captured. Furthermore, the proposed system will implement permanent capacitive couplers that offer better sensitivity compared to other sensors. In this paper the setup and calibration of these sensors, together with some preliminary results will be presented.

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More information

Published date: 8 November 2010
Additional Information: Event Dates: 8 - 10 November 2010
Venue - Dates: 7th Mediterranean Conference on Power Generation, Transmission, Distribution and Energy Conversion, Agia Napa, Cyprus, 2010-11-08 - 2010-11-10
Organisations: Electronics & Computer Science, EEE

Identifiers

Local EPrints ID: 271972
URI: http://eprints.soton.ac.uk/id/eprint/271972
PURE UUID: 132a9c4e-0b55-441e-b9f6-495272100641

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Date deposited: 01 Feb 2011 18:20
Last modified: 20 Nov 2021 10:47

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Contributors

Author: D Evagorou
Author: A Kyprianou
Author: A Stavrou
Author: V Efthymiou
Author: P L Lewin
Author: G E Georghiou

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