To read this content please select one of the options below:

Simulation on motion characteristics of space charge in single oil-paper insulation

Zhifei Yang (School of Electrical Engineering, Wuhan University, Wuhan, China)
Zhiye Du (School of Electrical Engineering, Wuhan University, Wuhan, China)
Jiangjun Ruan (School of Electrical Engineering, Wuhan University, Wuhan, China)
Shuo Jin (School of Electrical Engineering, Wuhan University, Wuhan, China)
Guodong Huang (School of Electrical Engineering, Wuhan University, Wuhan, China)
Qixiang Lian (School of Electrical Engineering, Wuhan University, Wuhan, China)
Yifan Liao (Electrical Power Research Institute, China Southern Power Grid Co., Ltd, Guangzhou, China)
156

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

Copyright © 2017, Emerald Publishing Limited

Related articles