Numerical Simulations of Temperature Stability Limits in High-Voltage Direct Current Cable Insulations

Jörgens, Christoph; Kasolis, Fotios; Clemens, Markus

doi:10.1109/tmag.2019.2894023

Cited by 6 publications

(11 citation statements)

References 12 publications

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“…where 0 is the vacuum electric permittivity and is the polarization vector. Within the theory of dielectrics [11], can be expressed as the superposition of a certain number of polarization mechanisms that respond to the application of an electric field with different characteristic times:…”

Section: Modelmentioning

confidence: 99%

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Charging and Discharging Current Measurements and Impact of Polarization Dynamics on Electric Field Modeling in HVDC Paper-Insulated Cables

et al. 2021

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Accurate modeling and simulation of electric field transients in HVDC cables is an important support to optimize insulation system design and to evaluate the influence of voltage transients and steadystate conditions on accelerated ageing mechanisms and insulation reliability. Traditionally, field models considering time-independent permittivity and conductivity are used, but this approach neglects polarization mechanisms and charge trapping-detrapping phenomena. This article includes polarization dynamics in the field model and shows that its impact on transient electric field simulations in HVDC paper-insulated cables can be significant. A method is presented to infer the model parameters from experimental polarization and depolarization current measurements. INDEX TERMS HVDC cables, electrical insulation, dielectric polarization, electric field transient.

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Section: Modelmentioning

confidence: 99%

“…Traditional electric field simulation approaches [2,10,11] are based on the following quasi-electrostatic model:…”

Section: Introductionmentioning

confidence: 99%

Charging and Discharging Current Measurements and Impact of Polarization Dynamics on Electric Field Modeling in HVDC Paper-Insulated Cables

et al. 2021

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“…Field simulation offers the possibility to adequately resolve the electrothermal field phenomena of HV equipment in space and time (see e.g., [12][13][14]). Different studies were dedicated to HVDC cables and their nonlinear behavior [15][16][17][18][19][20]. Several authors outlined the modeling and simulation of HV cable joints [21,22].…”

Section: Introductionmentioning

confidence: 99%

Towards Electrothermal Optimization of a HVDC Cable Joint Based on Field Simulation

et al. 2021

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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.

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“…Christoph et al [5] calculated the breakdown voltage at different temperatures through numerical simulation based on the established electrothermal highvoltage direct current cable model and found that the breakdown voltage was related to the temperature at the sheath. Kasolis et al [6] carried out a numerical simulation of the electrothermal coupling field with non-linear fielddependent conductivity. By changing the applied voltage and the current in the conductor, the conditions of thermal breakdown were calculated, and the simulation results were in good agreement with the experimental results.…”

Section: Introductionmentioning

confidence: 99%

Research on the electric field intensity distribution of high-voltage cable terminal improved by non-linear material

Li¹,

Wang²,

Xu³

2021

Manufacturing Rev.

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The electric field distortion caused by the high voltage current environment in the cable terminal will greatly increase the failure probability and reduce the operation safety; therefore, it is necessary to ensure the uniform distribution of the electric field in the terminal. This paper briefly introduced the high-voltage cable terminal and non-linear materials. The traditional silicone rubber and the silicone rubber added with nano-SiO2 were prepared. The electrical conductivity of the two silicone rubbers was tested, and the electric field of the cable terminal was simulated. The results demonstrated that the nano-SiO2 improved silicone rubber had a higher non-linear conductivity and was less affected by temperature. The calculation results of the simulation model also showed that the distribution of the internal field strength was more uniform, and the maximum field strength on the reinforced insulation was smaller after the improved silicone rubber was used as the reinforced insulation.

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Numerical Simulations of Temperature Stability Limits in High-Voltage Direct Current Cable Insulations

Cited by 6 publications

References 12 publications

Charging and Discharging Current Measurements and Impact of Polarization Dynamics on Electric Field Modeling in HVDC Paper-Insulated Cables

Charging and Discharging Current Measurements and Impact of Polarization Dynamics on Electric Field Modeling in HVDC Paper-Insulated Cables

Towards Electrothermal Optimization of a HVDC Cable Joint Based on Field Simulation

Research on the electric field intensity distribution of high-voltage cable terminal improved by non-linear material

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