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Voltage grading design of UHV surge arresters using 3D transient capacitive-resistive field simulations

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4 Author(s)
Sjöstedt, H. ; Surge Arresters, Power Products/ABB AB, Ludvika, Sweden ; Stenström, L. ; Pusch, D. ; Ostrowski, J.

Numerical analysis of UHV gapless metal-oxide surge arresters have been performed utilizing capacitive-resistive coupling transient electric field simulations. The calculations are performed in 3D and for 3-phase installations. Two types of voltage grading methods for surge arresters have been studied, with grading rings and with external grading capacitors. The results show that important advantages like a shorter and lighter arrester with improved protection performance is possible to obtain using external grading capacitors instead of grading rings.

Published in:

High Voltage Engineering and Application (ICHVE), 2010 International Conference on

Date of Conference:

11-14 Oct. 2010

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