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A protocol for space charge measurements in full-size HVDC extruded cables

A protocol for space charge measurements in full-size HVDC extruded cables
A protocol for space charge measurements in full-size HVDC extruded cables
This position paper, prepared by the IEEE DEIS HVDC Cable Systems Technical Committee, illustrates a protocol recommended for the measurement of space charges
in full-size HVDC extruded cables during load cycle qualification tests (either prequalification load cycles or type test load cycles). The protocol accounts for the
experimental practices of space charge measurements in the thick insulation of coaxial cables in terms of poling time, depolarization time, heating and cooling of specimens, as
well as for the experience gained very recently from such kind of measurements performed in the framework of qualification tests relevant to ongoing HVDC cable
system projects. The goal of the protocol is not checking the compliance with any maximum acceptable limit of either space charge or electric field. Rather, this protocol
aims at assessing the variation of the electric field profile in the cable insulation wall during poling time at the beginning and at the end of load cycle qualification tests for full-size HVDC extruded cables. Indeed, in the design stage the electric field distributions are determined by the cable geometry and by temperature gradient in the insulation. Thus, the design is based on macroscopic parameters conductivity and permittivity and how they depend upon temperature. Any disturbance of the electric field due to space charge accumulation will only be revealed during space charge measurements either in as-manufactured state or in the aged state after load cycle
qualification tests.
21-34
Mazzanti, G.
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Chen, George
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Fothergill, J. C.
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Hozumi, N.
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Li, J.
c01989cb-c2a9-41ed-9e23-0618c53a3e85
Marzinotto, M.
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Mauseth, F.
951d9609-a36a-44b2-9028-60a6a2902c3b
Morshuis, P.
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Reed, C.
ac451fd6-3abe-4a36-be6c-655dc0a4a77b
Tzimas, A.
533c0c41-47d7-41d4-bae3-f5e2f337a5eb
Wu, Kai
3aa3e84f-d870-448f-b347-362a5ac63737
Mazzanti, G.
3cd84ac0-127d-4e4e-977e-29e350059f93
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Fothergill, J. C.
8a8bc487-7310-4bc7-ada8-88ce9e780d30
Hozumi, N.
db5eda84-e5ee-4d1a-9ceb-a4429263d69f
Li, J.
c01989cb-c2a9-41ed-9e23-0618c53a3e85
Marzinotto, M.
66441a3c-7586-48c2-8b30-ec587b02ad65
Mauseth, F.
951d9609-a36a-44b2-9028-60a6a2902c3b
Morshuis, P.
4f01d64d-cdad-430c-937f-6f7699194d5b
Reed, C.
ac451fd6-3abe-4a36-be6c-655dc0a4a77b
Tzimas, A.
533c0c41-47d7-41d4-bae3-f5e2f337a5eb
Wu, Kai
3aa3e84f-d870-448f-b347-362a5ac63737

Mazzanti, G., Chen, George, Fothergill, J. C., Hozumi, N., Li, J., Marzinotto, M., Mauseth, F., Morshuis, P., Reed, C., Tzimas, A. and Wu, Kai (2015) A protocol for space charge measurements in full-size HVDC extruded cables. IEEE Transactions on Dielectrics & Electrical Insulation, 22 (1), 21-34. (doi:10.1109/TDEI.2014.004557).

Record type: Article

Abstract

This position paper, prepared by the IEEE DEIS HVDC Cable Systems Technical Committee, illustrates a protocol recommended for the measurement of space charges
in full-size HVDC extruded cables during load cycle qualification tests (either prequalification load cycles or type test load cycles). The protocol accounts for the
experimental practices of space charge measurements in the thick insulation of coaxial cables in terms of poling time, depolarization time, heating and cooling of specimens, as
well as for the experience gained very recently from such kind of measurements performed in the framework of qualification tests relevant to ongoing HVDC cable
system projects. The goal of the protocol is not checking the compliance with any maximum acceptable limit of either space charge or electric field. Rather, this protocol
aims at assessing the variation of the electric field profile in the cable insulation wall during poling time at the beginning and at the end of load cycle qualification tests for full-size HVDC extruded cables. Indeed, in the design stage the electric field distributions are determined by the cable geometry and by temperature gradient in the insulation. Thus, the design is based on macroscopic parameters conductivity and permittivity and how they depend upon temperature. Any disturbance of the electric field due to space charge accumulation will only be revealed during space charge measurements either in as-manufactured state or in the aged state after load cycle
qualification tests.

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Published date: February 2015
Organisations: EEE

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Local EPrints ID: 380099
URI: http://eprints.soton.ac.uk/id/eprint/380099
PURE UUID: 25d3b6fc-2a1b-4ce0-bcb9-bd8fcc918a60

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Date deposited: 03 Sep 2015 11:35
Last modified: 16 Dec 2019 20:15

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