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Finite element modelling of ionized field quantities around a monopolar HVDC transmission line

Vinay Jaiswal and M Joy Thomas

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In this paper, the Poisson's equation describing the ionized field around an HVDC line is solved using an improved finite element based technique. First order isoparametric quadrilateral elements, together with a modified updating criterion for the space charge distribution, are implemented in the iterative procedure. A novel technique is presented for mesh generation in the presence of space charges. Electric field lines and equipotential lines have been computed using the proposed technique. Total corona current at different applied voltages above corona onset voltage, electric field at the ground plane with and without the presence of space charges and current density at the ground plane have also been computed. The results are in agreement with the experimental values available in the published literature.


PACS

84.70.+p High-current and high-voltage technology: power systems; power transmission lines and cables

02.70.Dh Finite-element and Galerkin methods

77.22.Jp Dielectric breakdown and space-charge effects

02.60.Lj Ordinary and partial differential equations; boundary value problems

Subjects

Computational physics

Condensed matter: electrical, magnetic and optical

Electronics and devices

Dates

Issue 23 (7 December 2003)

Received 22 January 2003

Published 19 November 2003



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