Investigation of Statistical Distribution of Energization Overvoltages in 380 kV Hybrid OHL-Cable Systems

Investigation of Statistical Distribution of Energization Overvoltages in 380 kV Hybrid OHL-Cable Systems

Khalilnezhad, H. (TU Delft Intelligent Electrical Power Grids)
Popov, M. (TU Delft Intelligent Electrical Power Grids)
Bos, Jorrit A. (TenneT TSO B.V.)
de Jong, JPW (TenneT TSO B.V.)
van der Sluis, L. (TU Delft EEMS - General)

2018

Switching operations in power systems can produce significant overvoltages under specific circumstances. With the increasing application of underground cables in transmission systems, the statistical distribution of energization overvoltages is expected to change substantially due to the different electrical characteristics of cables and OHLs. Therefore, it is crucial to perform an insulation coordination study by analysis of the statistical distribution of energization overvoltages. This paper presents a statistical switching analysis on a hybrid OHL-Cable circuit to investigate how such hybrid circuits can affect the distribution of overvoltages. The literature has addressed the distribution of energization overvoltages only for OHLs or cables, but such an study is not available for hybrid systems consisting of OHLs and cables combined. The study is carried out for different cable lengths in the case study to identify how an increasing cable share in the circuit influences the overvoltages distribution due to no-load energization. Moreover, the impact of symmetrical and asymmetrical circuit structures is also addressed. The study is carried out on a distributed frequency-dependent parameter model of the Dutch 380 kV grid in PSCAD/EMTDC.

Cable
energization
insulation coordination
switching overvoltage
statistical switching

http://resolver.tudelft.nl/uuid:651cf9c9-391c-4f7d-9a3f-a79b393711e3

2021-08-17

IEEE International Conference on Power Systems Transients (IPST)

International Conference on Power Systems Transients IPST 2017, 2017-06-26 → 2017-06-29, Seoul, Korea, Republic of

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.

Institutional Repository

conference paper

© 2018 H. Khalilnezhad, M. Popov, Jorrit A. Bos, JPW de Jong, L. van der Sluis