Statistical Distribution of Energization Overvoltages of EHV Cables

Statistical distributions of switching overvoltages have been used for decades for the determination of insulation levels of extremely high voltage (EHV) systems. Existing statistical distributions obtained in the 1970s are for overhead lines, and statistical distributions of switching overvoltages...

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Bibliographic Details
Published in:IEEE transactions on power delivery 2013-07, Vol.28 (3), p.1423-1432
Main Authors: Ohno, T., Bak, C. L., Ametani, A., Wiechowski, W., Sorensen, T. K.
Format: Article
Language:English
Subjects:
Applied sciences
Electric connection. Cables. Wiring
Electrical engineering. Electrical power engineering
Electrical power engineering
Energization overvoltage
Exact sciences and technology
extremely high voltage (EHV) cables
insulation coordination
Miscellaneous
Overhead networks
Power cable insulation
Power cables
Power networks and lines
Probability distribution
Statistical distributions
statistical switching
Surges
Switches
Various equipment and components
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Summary:Statistical distributions of switching overvoltages have been used for decades for the determination of insulation levels of extremely high voltage (EHV) systems. Existing statistical distributions obtained in the 1970s are for overhead lines, and statistical distributions of switching overvoltages of EHV cables are not available to date. This paper derives the statistical distribution of energization overvoltages of EHV cables. Through the comparison of the statistical distributions of EHV cables and overhead lines, it has been found that line energization overvoltages on the cables are lower than those on the overhead lines with respect to maximum, 2%, and mean values. As the minimum value is almost at the same level, standard deviations are smaller for the cables. The obtained statistical distributions in this paper are of a great importance in considering insulation levels of cable systems.
ISSN:0885-8977
1937-4208
DOI:10.1109/TPWRD.2013.2254726