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Cahorabassa-Apollo HVDC link

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1 Author(s)
Moore, R.J. ; Eskom, Johannesburg, South Africa

The Cahora-bassa HVDC link consists of two 533 kV lines spaced approximately 1 km apart. If one line is out power can be supplied with one line and earth return. The current being DC will flow through the whole earth, however where it enters or leaves the earth the cross sectional area must reduce before it can pass up the electrode connecting the conductor to earth. The author discusses the design of the earth electrodes and an electronically conducting backfill material which excluded ionic conduction. Laboratory tests on backfill media are discussed as is the testing and installation of the new electrode

Published in:

AFRICON, 1996., IEEE AFRICON 4th  (Volume:2 )

Date of Conference:

24-27 Sep 1996

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