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A New Method to Improve the Sensitivity of Leak Detection in Self-Contained Fluid-filled Cables

A New Method to Improve the Sensitivity of Leak Detection in Self-Contained Fluid-filled Cables
A New Method to Improve the Sensitivity of Leak Detection in Self-Contained Fluid-filled Cables
A method of real-time detection of leaks for self-contained fluid-filled cables without taking them out of service has been assessed and a novel machine learning technique, i.e. support vector regression (SVR) analysis has been investigated to improve the detection sensitivity of the self-contained fluid-filled (FF) cable leaks. The condition of a 400 kV underground FF cable route within the National Grid transmission network has been monitored by Drallim pressure, temperature and load current measurement system. These three measured variables are used as parameters to describe the condition of the cable system. In the regression analysis the temperature and load current of the cable circuit are used as independent variables and the pressure within cables is the dependent variable to be predicted. As a supervised learning algorithm, the SVR requires data with known attributes as training samples in the learning process and can be used to identify unknown data or predict future trends. The load current is an independent variable to the fluid-filled system itself. The temperature, namely the tank temperature is determined by both the load current and the weather condition i.e. ambient temperature. The pressure is directly relevant to the temperature and therefore also correlated to the load current. The Gaussian-RBF kernel has been used in this investigation as it has a good performance in general application. The SVR algorithm was trained using 4 days data, as shown in Figure 1, and the optimized SVR is used to predict the pressure using the given load current and temperature information.
51
Hao, L
e6006548-3fc1-4a7e-9df4-a4e9a9a05c45
Lewin, P L
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Swingler, S G
4f13fbb2-7d2e-480a-8687-acea6a4ed735
Bradley, C
68d9d906-24a7-4cae-af25-bdef07406455
Hao, L
e6006548-3fc1-4a7e-9df4-a4e9a9a05c45
Lewin, P L
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Swingler, S G
4f13fbb2-7d2e-480a-8687-acea6a4ed735
Bradley, C
68d9d906-24a7-4cae-af25-bdef07406455

Hao, L, Lewin, P L, Swingler, S G and Bradley, C (2011) A New Method to Improve the Sensitivity of Leak Detection in Self-Contained Fluid-filled Cables. UHVnet 2011, United Kingdom. 18 - 19 Jan 2011. p. 51 .

Record type: Conference or Workshop Item (Poster)

Abstract

A method of real-time detection of leaks for self-contained fluid-filled cables without taking them out of service has been assessed and a novel machine learning technique, i.e. support vector regression (SVR) analysis has been investigated to improve the detection sensitivity of the self-contained fluid-filled (FF) cable leaks. The condition of a 400 kV underground FF cable route within the National Grid transmission network has been monitored by Drallim pressure, temperature and load current measurement system. These three measured variables are used as parameters to describe the condition of the cable system. In the regression analysis the temperature and load current of the cable circuit are used as independent variables and the pressure within cables is the dependent variable to be predicted. As a supervised learning algorithm, the SVR requires data with known attributes as training samples in the learning process and can be used to identify unknown data or predict future trends. The load current is an independent variable to the fluid-filled system itself. The temperature, namely the tank temperature is determined by both the load current and the weather condition i.e. ambient temperature. The pressure is directly relevant to the temperature and therefore also correlated to the load current. The Gaussian-RBF kernel has been used in this investigation as it has a good performance in general application. The SVR algorithm was trained using 4 days data, as shown in Figure 1, and the optimized SVR is used to predict the pressure using the given load current and temperature information.

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More information

Published date: 18 January 2011
Additional Information: Event Dates: 18-19 January 2011
Venue - Dates: UHVnet 2011, United Kingdom, 2011-01-18 - 2011-01-19
Organisations: Electronics & Computer Science, EEE

Identifiers

Local EPrints ID: 271882
URI: http://eprints.soton.ac.uk/id/eprint/271882
PURE UUID: 1a694131-e5ff-48e9-95ea-88e67bc27346

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Date deposited: 07 Jan 2011 16:38
Last modified: 19 Jul 2019 22:11

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Contributors

Author: L Hao
Author: P L Lewin
Author: S G Swingler
Author: C Bradley

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