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Energies 2017, 10(12), 2147; https://doi.org/10.3390/en10122147

Oil Impregnated Pressboard Barrier Systems Based on Ester Fluids for an Application in HVDC Insulation Systems

Institute of High Voltage Engineering, TU Dortmund University, 44227 Dortmund, Germany
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Received: 22 November 2017 / Revised: 12 December 2017 / Accepted: 13 December 2017 / Published: 15 December 2017
(This article belongs to the Section Energy Fundamentals and Conversion)
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Abstract

Ester-based insulation fluids are being increasingly used in high-voltage insulation systems. The reasons are the advantages in the area of ecological compatibility and resource-saving provision. The intention to use ester-based insulation fluids in high voltage direct current (HVDC) equipment is new. The major challenge in designing the HVDC insulation system is, that the systems do not only experience an alternating voltage, but also a direct voltage Offset. This presents a challenge to predict the electric field distribution. For this purpose, basic investigations are carried out in the form of conductivity investigations for various insulation barrier systems. In addition, a mineral oil serves as a reference oil for estimating existing insights. The results show the influence of the ester-based insulating liquids on the direct current (DC) conductivity for basic arrangements, consisting of pressboard barriers and mixed insulations. View Full-Text
Keywords: transformer; alternative insulating oils; HVDC insulating system; DC conductivity; pressboard; Midel®7131; FR3® transformer; alternative insulating oils; HVDC insulating system; DC conductivity; pressboard; Midel®7131; FR3®
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Rumpelt, P.; Jenau, F. Oil Impregnated Pressboard Barrier Systems Based on Ester Fluids for an Application in HVDC Insulation Systems. Energies 2017, 10, 2147.

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