Electroquasistatic quasi‐3D finite element simulation of a graded surge arrester

Surge arresters of station class are equipped with field grading elements that break the rotational symmetry of the arrester body. To avoid a computationally expensive full three‐dimensional (3D) simulation, a quasi‐3D simulation procedure is presented to study graded arresters. The method employs a...

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Bibliographic Details
Published inInternational journal of numerical modelling Vol. 33; no. 5
Main Authors D'Angelo, Laura A. M., Späck‐Leigsnering, Yvonne, De Gersem, Herbert
Format Journal Article
LanguageEnglish
Published Bognor Regis Wiley Subscription Services, Inc 01.09.2020
Subjects
arresters
Boundary conditions
Computer simulation
Electric fields
electroquasistatics
Finite element method
finite element methods
hybrid discretization
Simulation
Spectral element method
spectral element methods
Surge arresters
Trigonometric functions
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Summary:Surge arresters of station class are equipped with field grading elements that break the rotational symmetry of the arrester body. To avoid a computationally expensive full three‐dimensional (3D) simulation, a quasi‐3D simulation procedure is presented to study graded arresters. The method employs a hybrid discretization combining a two‐dimensional (2D) axisymmetric finite element (FE) method in axial and radial direction with a spectral element method in terms of trigonometric functions in azimuthal direction. Furthermore, the asymmetric boundary conditions associated with the support rods are taken into account by collocation in a saddle‐point system of equations. The method is validated and compared with a standard 3D FE simulation of a test problem. It is, subsequently, applied to study the electric field distribution of a graded station class surge arrester.
ISSN:0894-3370
1099-1204
DOI:10.1002/jnm.2575