Efficient Calculation of Switching Overvoltages Considering Corona Attenuation

This paper utilizes the Unscented Transform together with Cornish-Fisher expansion to estimate the 2%-value of switching overvoltages when considering the impact of trapped charge and corona attenuation. Simulations were performed using a piecewise linear corona model for twin- and triple-conductor...

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Bibliographic Details
Published in:IEEE transactions on power delivery 2023-08, Vol.38 (4), p.1-7
Main Authors: Lennerhag, Oscar, Lundquist, Jan, Bollen, Math H. J.
Format: Article
Language:English
Subjects:
Arresters
Attenuation
Conductors
Corona
Data models
Electric Power Engineering
Elkraftteknik
Insulation coordination
Monte Carlo simulation
Overvoltage
Power system transients
Stochastic processes
Surges
Switches
Switching
Switching overvoltages
Trapped charge
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Summary:This paper utilizes the Unscented Transform together with Cornish-Fisher expansion to estimate the 2%-value of switching overvoltages when considering the impact of trapped charge and corona attenuation. Simulations were performed using a piecewise linear corona model for twin- and triple-conductor lines. The proposed method was compared to Monte Carlo methods through simulations in PSCAD. The method is shown to be able to estimate the 2%-value with comparable accuracy to methods used in industry today, but with only one fifth of the number of calculations.
ISSN:0885-8977
1937-4208
1937-4208
DOI:10.1109/TPWRD.2023.3255782