Simulation on motion characteristics of space charge in single oil-paper insulation
ISSN: 0332-1649
Article publication date: 6 November 2017
Abstract
Purpose
The purpose of this paper is numerical calculation of total electric field in oil-paper insulation. Now, there is no effective method to consider the influence of space charges when calculating the total electric field distribution in the main insulation system of the valve-side winding of an ultra-high-voltage direct current converter transformer.
Design/methodology/approach
To calculate the total electric field in an oil-paper insulation system, a new simulation method in single-layer oil-paper insulation based on the transient upstream finite element method (TUFEM) is proposed, in which the time variable is considered. The TUFEM is used to calculate the total electric field in an oil-paper insulation system by considering the move law of space charges. The simulation method is verified by comparing the simulation results to the test data. The move law of space charges and distribution characteristics of the electric field under difference voltage values in single-layer oil-paper insulation were presented.
Findings
The results show that the TUFEM has an excellent accuracy compared with the test data. When carrier mobility is a constant, the time to reach the steady state is inversely correlated with the initial electric field intensity, and the distortion rate of the internal total electric field is positively correlated with the initial electric field intensity.
Originality/value
This paper provides an exploratory research on the simulation of space charge transport phenomenon in oil-paper and has guiding significance to the design of oil-paper insulation.
Keywords
Acknowledgements
This research is supported by the National Natural Science Foundation of China (51477120), the National Natural Science Foundation of China(51741708) and the National Engineering Laboratory for Ultra High Voltage Engineering Technology (Kunming, Guangzhou) (CSGTRC[2015]Q1543B14).
Citation
Yang, Z., Du, Z., Ruan, J., Jin, S., Huang, G., Lian, Q. and Liao, Y. (2017), "Simulation on motion characteristics of space charge in single oil-paper insulation", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 36 No. 6, pp. 1663-1675. https://doi.org/10.1108/COMPEL-12-2016-0564
Publisher
:Emerald Publishing Limited
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