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Energies 2017, 10(12), 2160; doi:10.3390/en10122160

A Combined Electro-Thermal Breakdown Model for Oil-Impregnated Paper

1
School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China
2
State Key Lab of Control and Simulation of Power Systems and Generation Equipment, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
*
Author to whom correspondence should be addressed.
Received: 6 November 2017 / Revised: 6 December 2017 / Accepted: 11 December 2017 / Published: 18 December 2017
(This article belongs to the Section Electrical Power and Energy System)
View Full-Text   |   Download PDF [2951 KB, uploaded 18 December 2017]   |  

Abstract

The breakdown property of oil-impregnated paper is a key factor for converter transformer design and operation, but it is not well understood. In this paper, breakdown voltages of oil-impregnated paper were measured at different temperatures. The results showed that with the increase of temperature, electrical, electro-thermal and thermal breakdown occurred successively. An electro-thermal breakdown model was proposed based on the heat equilibrium and space charge transport, and negative differential mobility was introduced to the model. It was shown that carrier mobility determined whether it was electrical or thermal breakdown, and the model can effectively explain the temperature-dependent breakdown. View Full-Text
Keywords: space charge; oil-impregnated paper; mobility; breakdown space charge; oil-impregnated paper; mobility; breakdown
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Huang, M.; Zhou, Y.; Zhou, Z.; Qi, B. A Combined Electro-Thermal Breakdown Model for Oil-Impregnated Paper. Energies 2017, 10, 2160.

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