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275 kV cable discharge field measurement and analysis of SVLs chain failure using ATP

Ghassemi, F., Dennis, S., Ainsley, A., Haddad, A. Manu ORCID: and Robson, S. ORCID: 2018. 275 kV cable discharge field measurement and analysis of SVLs chain failure using ATP. Electric Power Systems Research 161 , pp. 95-102. 10.1016/j.epsr.2018.04.009

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Results of field measurement of trapped charges on a 275 kV cable will be presented. The instrumentation and calibration method used in the measurement will be discussed. It will be shown that if the cable is not force-discharged by means of earth switches, the trapped charges will decay very slowly. The atmospheric parameters such as humidity and temperature affect the discharge time, which also depends on how much of the circuit is exposed to open air. The measurement results are used in EMTP-ATP simulation to confirm that trapped charges may be sufficient to cause sheath voltage limiters (SVL) of the cable to fail. The number of SVL breakdown depends on the mode of SVL failure, i.e. whether it attains low impedance (short circuit) or open circuit when the energy absorbed exceeds the rating.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Publisher: Elsevier
ISSN: 0378-7796
Date of First Compliant Deposit: 8 October 2018
Date of Acceptance: 9 April 2018
Last Modified: 22 Apr 2024 17:08

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