Reliability modeling of transmission networks
An explanatory study on further EHV underground cabling in the Netherlands
Nikoleta Kandalepa (TenneT TSO B.V.)
B. W. Tuinema (TU Delft - Intelligent Electrical Power Grids)
José Luis Rueda Rueda (TU Delft - Intelligent Electrical Power Grids)
M. A.M.M. van der Meijden (TU Delft - Intelligent Electrical Power Grids)
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Abstract
Recently, the installation of new overhead lines (OHLs) faces many challenges mainly due to social and environmental reasons. One solution with widespread public support is the installation of Extra High Voltage (EHV) AC XLPE Underground Cables (UGCs). Although it is encouraging from a social perspective, new challenges arise like concerns about the reliability impact. In this paper, an approach is developed, which examines how the installation of EHV UGCs influences the reliability of transmission networks. The approach accounts for short-term operational measures and calculates several reliability indicators. A numerical case study of the Dutch EHV transmission network is performed. Based on probabilistic sensitivity analysis, it is found that the most influencing factors on the indicators are the loading of the cable connection, the repair time and the cable configuration.
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