Insulation levels of EHV systems have been determined based on the statistical distribution of switching overvoltages since 1970s when the statistical distribution was found for overhead lines. Responding to an increase in the planned and installed EHV cables, the authors have derived the statistical distribution of energization overvoltages for EHV cables and have made clear their characteristics compared with those of the overhead lines. This paper identifies the causes and physical meanings of the characteristics so that it becomes possible to use the obtained statistical distribution for the determination of insulation levels of cable systems.
|Number of pages||7|
|Publication status||Published - 2013|
|Event||International Conference on Power Systems Transients, IPST 2013 - Vancouver, Canada|
Duration: 18 Jul 2013 → 20 Jul 2013
|Conference||International Conference on Power Systems Transients, IPST 2013|
|Period||18/07/2013 → 20/07/2013|