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The Study on the Homogenization and Equivalence of Dielectric Parameters in Laminated Insulating Paper Structures

Lecture Notes in Electrical Engineering, ISSN: 1876-1119, Vol: 1312 LNEE, Page: 547-555
2025
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Conference Paper Description

The valve-side main insulation of a converter transformer comprises a composite oil-paper insulation structure formed by multiple layers of insulating paper, which is one of the weak points of transformer insulation. To address the issues of increased mesh quantity and difficult convergence in electric field simulations caused by layer-by-layer modeling of laminated insulating paper, this paper establishes a measurement platform for the relative permittivity and resistivity of insulating paper. Homogenization and equivalence tests on laminated insulating paper are conducted. Based on the experimental results, the relationship between the dielectric parameters of the laminated insulating paper and those of a single layer is analyzed, and homogenized equivalent expressions for resistivity and permittivity as functions of the number of layers are derived. These findings provide a reference for homogenized equivalent modeling and dielectric parameter setting of laminated insulating paper in simulations.

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