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Partial Discharge Detection in Cables Using VHF Capacitive Couplers

Partial Discharge Detection in Cables Using VHF Capacitive Couplers
Partial Discharge Detection in Cables Using VHF Capacitive Couplers
In order to detect and locate partial discharge (PD) activity within HV cables and in particular cable joints, the feasibility of using a very high frequency (VHF) capacitive coupler technique has been investigated. In addition, an alternative PD off-line test method for cable joints or cable sections within long cable systems has been developed. By energising the joint or a short section of the cable screen only this method has the advantage of reducing the power supply requirement of the test source. The application of capacitive couplers for this PD off-line test method has been investigated. In order to use this approach there must be an insulation gap between the coupler and the outer sheath of the test cable. The effect of this gap on measured sensitivity has been investigated experimentally and through the use of a simulation model. Obtained results are in good agreement. Cross-correlation techniques have been implemented to automatically estimate the signal time of flight from different coupler outputs. Methods of calibrating the coupler applied to the alternative PD off-line test method have also been investigated.
1070-9878
343-353
Tian, Y.
2055a72a-f579-48b9-a0e6-d59b0682bbd2
Lewin, P.L.
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Davies, A.E.
56d95222-b259-494a-92e9-68b090ec0dcd
Sutton, S.J.
571c7136-1eb6-44e1-8979-ca0829469a6b
Swingler, S.G.
f9fbe599-7685-46e8-9f11-55cbd40e2933
Tian, Y.
2055a72a-f579-48b9-a0e6-d59b0682bbd2
Lewin, P.L.
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Davies, A.E.
56d95222-b259-494a-92e9-68b090ec0dcd
Sutton, S.J.
571c7136-1eb6-44e1-8979-ca0829469a6b
Swingler, S.G.
f9fbe599-7685-46e8-9f11-55cbd40e2933

Tian, Y., Lewin, P.L., Davies, A.E., Sutton, S.J. and Swingler, S.G. (2003) Partial Discharge Detection in Cables Using VHF Capacitive Couplers. IEEE Transactions on Dielectrics & Electrical Insulation, 10 (2), 343-353.

Record type: Article

Abstract

In order to detect and locate partial discharge (PD) activity within HV cables and in particular cable joints, the feasibility of using a very high frequency (VHF) capacitive coupler technique has been investigated. In addition, an alternative PD off-line test method for cable joints or cable sections within long cable systems has been developed. By energising the joint or a short section of the cable screen only this method has the advantage of reducing the power supply requirement of the test source. The application of capacitive couplers for this PD off-line test method has been investigated. In order to use this approach there must be an insulation gap between the coupler and the outer sheath of the test cable. The effect of this gap on measured sensitivity has been investigated experimentally and through the use of a simulation model. Obtained results are in good agreement. Cross-correlation techniques have been implemented to automatically estimate the signal time of flight from different coupler outputs. Methods of calibrating the coupler applied to the alternative PD off-line test method have also been investigated.

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Published date: April 2003
Organisations: Electronics & Computer Science

Identifiers

Local EPrints ID: 257432
URI: http://eprints.soton.ac.uk/id/eprint/257432
ISSN: 1070-9878
PURE UUID: b4752d7a-bdde-4e7b-ad89-36cf05d0685e

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Date deposited: 04 Mar 2004
Last modified: 25 Nov 2021 21:54

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Contributors

Author: Y. Tian
Author: P.L. Lewin
Author: A.E. Davies
Author: S.J. Sutton
Author: S.G. Swingler

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