Sheath Voltages and Currents in 230kV Oil-Filled Underground Power Cables

Surasak Phanthurat; Apibal Pruksanubal

doi:10.4028/www.scientific.net/AMM.781.276

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 781Sheath Voltages and Currents in 230kV Oil-Filled...

Sheath Voltages and Currents in 230kV Oil-Filled Underground Power Cables

Abstract:

Three-phase underground power cables can induce voltages and currents in their recover sheaths. The induced voltages and currents in sheath are undesirable. They generate heat losses and reduce the cable ampacity. Moreover, the induced voltages can generate electric shock to the workers, who maintain the power cables. It is very important to predict the sheath voltages and currents, which depend on different parameters, such as the sheath grounding system, the geometry of the cables, the gap between them, etc. In this paper, the voltages and currents induced in sheath for different installation of underground power cables (trefoil and flat formation) are studied and presented. For each case study of installation, the results of sheath voltages and currents have been computed and compared. Finally, the case of cross bonding with increasing of cable spans can reduce the sheath voltage significantly.

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Periodical:

Applied Mechanics and Materials (Volume 781)

Pages:

276-279

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.781.276

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Online since:

August 2015

Authors:

Surasak Phanthurat*, Apibal Pruksanubal

Keywords:

Ampacity, Currents, Heat Loss, Sheath Voltages, Underground Power Cables

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* - Corresponding Author

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