Print Email Facebook Twitter Statistical Analysis of Energization Overvoltages in EHV Hybrid OHL-Cable Systems Title Statistical Analysis of Energization Overvoltages in EHV Hybrid OHL-Cable Systems Author Khalilnezhad, H. (TU Delft Intelligent Electrical Power Grids) Popov, M. (TU Delft Intelligent Electrical Power Grids) van der Sluis, L. (TU Delft EEMS - General) Bos, Jorrit A. (TenneT TSO B.V.) Ametani, Akihiro (Doshisha University) Date 2018 Abstract Energization overvoltages are among the severest overvoltages stressing insulations of EHV power system components. Since these overvoltages have a statistical nature, the insulation level should be determined with the use of a statistical approach by which the distribution of overvoltages is calculated. Literature has properly studied the distribution of energization overvoltages in purely OHL or cable systems, but such a study is not available for hybrid systems consisting of both OHLs and cables. It is expected that the overvoltage distributions change substantially when both OHLs and cables are used in a transmission line. This paper tackles this issue by analyzing the overvoltage distributions due to the energization of a 380 kV hybrid OHL-Cable circuit, in which the cable length is variable. The study includes various sensitivity analyses to find out the impact of system parameters and topology on overvoltages. By the statistical analysis, it has been discovered that energization overvoltages of a hybrid OHL-Cable circuit are higher than those of a fully-cable circuit and very likely lower than those of a fully-OHL circuit with the same transmission lengths. Subject Cablesenergization overvoltagesinsulation coordinationstatistical analysisswitching transients To reference this document use: http://resolver.tudelft.nl/uuid:8b03a8fd-d2ba-4eef-8f60-1025eed66e28 DOI https://doi.org/10.1109/TPWRD.2018.2825201 Embargo date 2021-08-17 ISSN 0885-8977 Source IEEE Transactions on Power Delivery, 33 (6), 2765-2775 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2018 H. Khalilnezhad, M. Popov, L. van der Sluis, Jorrit A. Bos, Akihiro Ametani Files PDF Statistical_Analysis_of_E ... ystems.pdf 3.4 MB Close viewer /islandora/object/uuid:8b03a8fd-d2ba-4eef-8f60-1025eed66e28/datastream/OBJ/view