A Review about the Modeling and Simulation of Electro-Quasistatic Fields in HVDC Cable Systems

Christoph Jörgens and Markus Clemens
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Christoph Jörgens: Chair of Electromagnetic Theory, School of Electrical, Information and Media Engineering, University of Wuppertal, 42119 Wuppertal, Germany
Markus Clemens: Chair of Electromagnetic Theory, School of Electrical, Information and Media Engineering, University of Wuppertal, 42119 Wuppertal, Germany

Energies, 2020, vol. 13, issue 19, 1-42

Abstract: In comparison to high-voltage alternating current (HVAC) cable systems, high-voltage direct current (HVDC) systems have several advantages, e.g., the transmitted power or long-distance transmission. The insulating materials feature a non-linear dependency on the electric field and the temperature. Applying a constant voltage, space charges accumulate in the insulation and yield a slowly time-varying electric field. As a complement to measurements, numerical simulations are used to obtain the electric field distribution inside the insulation. The simulation results can be used to design HVDC cable components such that possible failure can be avoided. This work is a review about the simulation of the time-varying electric field in HVDC cable components, using conductivity-based cable models. The effective mechanisms and descriptions of charge movement result in different conductivity models. The corresponding simulation results of the models are compared against measurements and analytic approximations. Different numerical techniques show variations of the accuracy and the computation time that are compared. Coupled electro-thermal field simulations are applied to consider the environment and its effect on the resulting electric field distribution. A special case of an electro-quasistatic field describes the drying process of soil, resulting from the temperature and electric field. The effect of electro-osmosis at HVDC ground electrodes is considered within this model.

Keywords: high voltage direct current; space charges; electro-osmosis; nonlinear electric conductivity; numerical simulation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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