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Energies
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Modelling and Numerical Simulation of HVDC Cable Systems
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Modelling and Numerical Simulation of HVDC Cable Systems

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "F: Electrical Engineering".

Deadline for manuscript submissions: closed (31 August 2021) | Viewed by 9022

Special Issue Editor

Prof. Dr. Markus Clemens

E-Mail Website
Guest Editor
Chair of Electromagnetic Theory, University of Wuppertal, Wuppertal, Germany
Interests: electromagnetic theory; numerical simulation; HVDC; computational electromagnetics; mathematical modeling; scientific computing; electric power transmission systems

Special Issue Information

Dear Colleagues,

High-voltage direct current (HVDC) cable systems have become a core technology in long-distance electric power transmission. The functional design and optimization of these HVDC cable systems in terms of operational safety and reliability is still a matter of ongoing research. In comparison to high-voltage alternating current (HVAC) systems, the insulation materials of HVDC components have different electrical and thermal stresses, resulting from the accumulation of space charge distributions within.

Numerical simulations are a powerful tool to analyze different cable components under the influence of charge transport within the insulations and to predict possible failure mechanisms. For an accurate description of the underlying physics, different processes need to be considered that make numerical simulation a challenging task. The strongly nonlinear electric conductivity of HVDC cable insulation components or the charge transport in gaseous insulations, e.g., within gas insulated lines (GIL) as a possible technical alternative to cable systems, are only two examples that make modeling and numerical computation of these systems a challenging task in research.

We invite scientific paper contributions to a topical issue of the Energies journal dedicated to the recent advances within the broad field of research on “Modeling and Numerical Simulation of Cable Systems”. Submitted papers to this issue can be of applied nature, e.g., the simulation of cables, cable joints, cable terminations, and alternative GIL systems, and can cover method development or fundamental findings.

With this scope, it is anticipated that this Special Issue will attract the interest of researchers in the fields of HVDC electric power transmission systems, electromagnetic theory, numerical computation, high-voltage techniques, material science, physics, and even applied mathematics. Between these fields of research in this topical issue of the Energies journal, the current state-of-the-art in modeling and numerical simulation of HVDC cable systems is to be shown with an emphasis on cross-disciplinary research and development studies.

Prof. Dr. Markus Clemens
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Electric field
  • Thermal field
  • Electric power system
  • Theoretical
  • Numerical
  • Field computation
  • Numerical simulation
  • Field inversion
  • High-voltage direct current (HVDC)
  • Polymeric insulation
  • Power cables
  • Space charges
  • Nonlinear electric conductivity
  • Numerical analysis
  • High-voltage techniques
  • Nonlinear systems
  • Electro-quasistatic field
  • Transient simulation
  • Static simulation

Published Papers (3 papers)

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Research

18 pages, 5327 KiB  
Article
Electric Field and Temperature Simulations of High-Voltage Direct Current Cables Considering the Soil Environment
by Christoph Jörgens and Markus Clemens
Energies 2021, 14(16), 4910; https://doi.org/10.3390/en14164910 - 11 Aug 2021
Cited by 10 | Viewed by 2287
Abstract
For long distance electric power transport, high-voltage direct current (HVDC) cable systems are a commonly used solution. Space charges accumulate in the HVDC cable insulations due to the applied voltage and the nonlinear electric conductivity of the insulation material. The resulting electric field [...] Read more.
For long distance electric power transport, high-voltage direct current (HVDC) cable systems are a commonly used solution. Space charges accumulate in the HVDC cable insulations due to the applied voltage and the nonlinear electric conductivity of the insulation material. The resulting electric field depends on the material parameters of the surrounding soil environment that may differ locally and have an influence on the temperature distribution in the cable and the environment. To use the radial symmetry of the cable geometry, typical electric field simulations neglect the influence of the surrounding soil, due to different dimensions of the cable and the environment and the resulting high computational effort. Here, the environment and its effect on the resulting electric field is considered and the assumption of a possible radial symmetric temperature within the insulation is analyzed. To reduce the computation time, weakly coupled simulations are performed to compute the temperature and the electric field inside the cable insulation, neglecting insulation losses. The results of a weakly coupled simulation are compared against those of a full transient simulation, considering the insulation losses for two common cable insulations with different maximum operation temperatures. Due to the buried depth of HV cables, an approximately radial symmetric temperature distribution within the insulation is obtained for a single cable and cable pairs when, considering a metallic sheath. Furthermore, the simulations show a temperature increase of the earth–air interface above the buried cable that needs to be considered when computing the cable conductor temperature, using the IEC standards. Full article
(This article belongs to the Special Issue Modelling and Numerical Simulation of HVDC Cable Systems)
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13 pages, 1866 KiB  
Article
Towards Electrothermal Optimization of a HVDC Cable Joint Based on Field Simulation
by Yvonne Späck-Leigsnering, Greta Ruppert, Erion Gjonaj, Herbert De Gersem and Myriam Koch
Energies 2021, 14(10), 2848; https://doi.org/10.3390/en14102848 - 14 May 2021
Cited by 9 | Viewed by 2245
Abstract
Extruded high-voltage direct current cable systems transmit electric power over long distances. Numerical field simulation can provide access to the internal electrothermal behavior of cable joints, which interconnect cable sections. However, coupled nonlinear electrothermal field simulations are still a challenge. In this work, [...] Read more.
Extruded high-voltage direct current cable systems transmit electric power over long distances. Numerical field simulation can provide access to the internal electrothermal behavior of cable joints, which interconnect cable sections. However, coupled nonlinear electrothermal field simulations are still a challenge. In this work, a robust numerical solution approach is implemented and validated. This approach allows for efficient parameter studies of resistively graded high-voltage direct current cable joint designs. It is assessed how the dielectric stress distribution between the conductor connection and the grounded cable sheath is influenced by nonlinear field and temperature dependent electric conductivity of the field grading material. Optimal field grading material parameters, which fulfill the field grading and power loss requirements, are suggested based on the simulation studies. Full article
(This article belongs to the Special Issue Modelling and Numerical Simulation of HVDC Cable Systems)
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16 pages, 4229 KiB  
Article
A Sophisticated Method of the Mechanical Design of Cable Accessories Focusing on Interface Contact Pressure
by Yi Luo, Zhengyi Han, Mingyu Zhou and Haitian Wang
Energies 2020, 13(11), 2976; https://doi.org/10.3390/en13112976 - 9 Jun 2020
Cited by 9 | Viewed by 3500
Abstract
The most critical positions of a prefabricated cable accessory, from the electrical point of view, are the interfaces between the stress cone and its surroundings. Accordingly, the contact pressure on those interfaces needs to be carefully designed to assure both good dielectric strength [...] Read more.
The most critical positions of a prefabricated cable accessory, from the electrical point of view, are the interfaces between the stress cone and its surroundings. Accordingly, the contact pressure on those interfaces needs to be carefully designed to assure both good dielectric strength and smooth installation of the stress cone. Nevertheless, since stress cones made from rubber are under large deformation after installation, their internal stress distribution is neither practical to measure directly by planting sensors, nor feasible to compute accurately with the conventional theory of linear structural mechanics. This paper presents one sophisticated method for computing the mechanical stress distribution in rubber stress cones of cable accessories by employing hyperelastic models in a computation model based on the finite element method. This method offers accurate results for rubber bodies of complex geometries and large deformations. Based on the method, a case study of a composite prefabricated termination for extruded cables is presented, and the sensitivity analysis is given as well. Full article
(This article belongs to the Special Issue Modelling and Numerical Simulation of HVDC Cable Systems)
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