Assessment of Line Energization Transients when Increasing Cable Length in 380 kV Power Grids

Conference paper (2016)

Authors

H. Khalilnezhad Intelligent Electrical Power Grids - EEMCS
M. Popov Intelligent Electrical Power Grids - EEMCS
L. van der Sluis EEMS - General
JPW de Jong TenneT TSO B.V.
N Nenadovic TenneT TSO B.V.
JA Bos TenneT TSO B.V.
Research Group
Intelligent Electrical Power Grids (EEMCS) (TU Delft)
EHV cables Cable length Switching overvoltage Energization Zero-missing phenomenon
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Published Date

2016

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Electrical Sustainable Energy

Research Group

Intelligent Electrical Power Grids

Abstract

Integration of long EHV XLPE underground cables in traditionally OHL-based transmission systems can result in abnormal transients caused by large cable shunt capacitance. Transients associated with switching of long cables may result in severe temporary or transient overvoltages. This paper investigates energization transients related to the installation of long 380 kV cables in transmission systems. Voltages and currents at multiple locations were analyzed in the time-domain after energization of different cable lengths in a 80 km mixed OHL-cable connection in the future Dutch 380 kV grid. Moreover, zero-missing phenomenon, as one of the likely events during energization transients of shunt compensated cables, and its countermeasures are discussed. The study comprises time-domain simulations in PSCAD/EMTDC environment,
where an accurate distributed frequency-dependent parameter model of the complete Dutch 380 kV grid is developed.