Lightning and switching impulse levels selection for long DC cable lines

Author

Marzinotto, M. ; Mazzanti, G. ; Mazzetti, C.

Author_Institution

TERNA, Roma, Italy

fYear

2011

fDate

16-19 Oct. 2011

Firstpage

510

Lastpage

513

Abstract

The impulse test levels play an even more important role for the design of HVDC cables than for HVAC cables. Nevertheless, the selection of both lightning and switching impulse test values for a given power DC intertie are mostly based on numerical simulation and on past experience on similar interties rather than on well-established and standardized practices. In this paper the selection of lightning and switching impulse voltage levels to be applied on short cable lengths in the prequalification and/or type tests is addressed for long DC cable lines (longer than 50 km) taking into account the impulse withstand behaviour with cable length via the enlargement law and the effect of over-voltage attenuation for surges that travel along the cable.

Keywords

impulse testing; lightning; numerical analysis; overvoltage; power cable testing; surges; HVAC cable; HVDC cable; cable surging; enlargement law; lightning selection; long DC cable line; numerical simulation; overvoltage attenuation effect; power DC intertie; short cable length; switching impulse test level selection; Cable insulation; Electric fields; Lightning; Power cables; Surges; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena (CEIDP), 2011 Annual Report Conference on

Conference_Location

Cancun

ISSN

0084-9162

Print_ISBN

978-1-4577-0985-2

Type

conf

DOI

10.1109/CEIDP.2011.6232706

Filename

6232706