Multiphysics approach to the boundary problems of power engineering and their application to the analysis of load-carrying capacity of power cable line

Korovkin, Nikolay; Greshnyakov, George; Dubitsky, Simon

doi:10.1109/pq.2014.6866837

Cited by 9 publications

(11 citation statements)

References 9 publications

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“…For instance, the IEC calculation cannot address the physical problems coupling with air convection, radiation, and heat transfer, and it will cause large errors in calculation of the multi-loop and complex environment. Another method is the numerical method, including the boundary element method [15], difference method, and finite element method [16][17][18]. The finite element method that is based on COMSOL can simulate actual working conditions and perform the coupling calculation of multiple physical fields.…”

Section: Introductionmentioning

confidence: 99%

“…Hwang et al focused on the thermal analysis on underground cable in PVC pipe, and showed that the cable temperature of direct burial laying is considerably lower than that of pipe laying [22]. Based on the research that analyzed the boundary problem in the coupling of multiple physical fields with the electromagnetic-thermal model of underground three-phase power cables, calculating the cable temperature with the finite element method can cover the shortage of IEC standard [17]. Xiong et al studied the temperature field and air velocity field of cable trench with an irregular distribution, and results showed that the cable temperature of irregular laying is higher than that of normal laying [23].…”

Section: Introductionmentioning

confidence: 99%

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Analysis on the Temperature Field and the Ampacity of XLPE Submarine HV Cable Based on Electro-Thermal-Flow Multiphysics Coupling Simulation

et al. 2020

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The operating temperature and the ampacity are important parameters to reflect the operating state of cross-linked polyethylene (XLPE) submarine high voltage (HV) cables, and it is of great significance to study the electrothermal coupling law of submarine cable under the seawater flow field. In this study, according to the actual laying conditions of the submarine cable, a multi-physical coupling model of submarine cable is established based on the electromagnetic field, heat transfer field, and fluid field by using the COMSOL finite element simulation software. This model can help to analyze how the temperature and ampacity of the submarine cable are affected by different laying methods, seawater velocity, seawater temperature, laying depth, and soil thermal conductivity. The experimental results show that the pipe laying method can lead to the highest cable conductor temperature, even exceeding the maximum heat-resistant operating temperature of the insulation, and the corresponding ampacity is minimum, so heat dissipation is required. Besides, the conductor temperature and the submarine cable ampacity have a linear relationship with the seawater temperature, and small seawater velocity can significantly improve the submarine cable ampacity. Temperature correction coefficients and ampacity correction coefficients for steady-state seawater are proposed. Furthermore, the laying depth and soil thermal conductivity have great impact on the temperature field and the ampacity of submarine cable, so measures (e.g., artificial backfilling) in areas with low thermal conductivity are needed to improve the submarine cable ampacity.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis on the Temperature Field and the Ampacity of XLPE Submarine HV Cable Based on Electro-Thermal-Flow Multiphysics Coupling Simulation

et al. 2020

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“…Cirino et al focused on the problem how the cable parameters used in FEM calculations are affected by skin and proximity effects [28]. Korovkin et al presented several possible modeling strategies regarding ampacity modeling using FEM for buried cables [29]. The conclusions drawn by the authors are consistent with the general statements on coupled problems made earlier by Hameyer et al [30], namely for the considered problem the thermal and electromagnetic time scales differ significantly.…”

Section: Introductory Remarksmentioning

confidence: 54%

A Multiphysics Analysis of Coupled Electromagnetic-Thermal Phenomena in Cable Lines

Cywiński¹,

Chwastek²

2021

Preprint

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The paper is focused on numerical modeling of multi-strand cable lines placed in free air. Modeling is carried out within the framework of the so-called multi-physics approach using commercial software. The paper describes in detail the steps undertaken to develop realistic, reliable numerical models of power engineering cables, taking into account their geometries and heat exchange conditions. The results might be of interest to the designers of multi-strand cable systems.

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“…Unfortunately, multiphysics analysis usually increases simulation complexity. In fact, considering multiphysics domains often implies multiscaling, which means that the combined physical models have significant differences in space or time scales [87]. For example, in cable current evaluation, an increase in complexity could be due to the different mesh density requirements of the combined physical models: calculation of eddy currents in the thin solid screen requires several layers of finite elements through the thickness of the screen, while a single layer is sufficient for heat-transfer calculation.…”

Section: Methodsmentioning

confidence: 99%

“…A multiphysics approach should be carried out, especially when a high simulation accuracy justifies the increment of the simulation complexity. Otherwise, simplifying assumptions can be made without impacting the results [87][88][89].…”

Section: Methodsmentioning

confidence: 99%

Concepts and Methods to Assess the Dynamic Thermal Rating of Underground Power Cables

et al. 2021

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With the increase in the electrical load and the progressive introduction of power generation from intermittent renewable energy sources, the power line operating conditions are approaching the thermal limits. The definition of thermal limits variable in time has been addressed under the concept of dynamic thermal rating (DTR), with which it is possible to provide a more detailed assessment of the line rating and exploit the electrical system more flexibly. Most of the literature on DTR has addressed overhead lines exposed to different weather conditions. The interest in the dynamic thermal rating of power cables is increasing, considering the evolution of computational methods and advanced systems for cable monitoring. This paper contains an overview of the concepts and methods referring to dynamic cable rating (DCR). Starting from the analytical formulations developed many years ago for determining the power cable rating in steady-state conditions, also reported in International Standards, this paper considers the improvements of these formulations proposed during the years. These improvements are leading to include more specific details in the models used for DCR analysis and the computational methods used to assess the power cable’s thermal conditions buried in soil. This paper is focused on highlighting the path from the initial theories and models to the latest literature contributions. Attention is paid to thermal modelling with different levels of detail, applications of 2D and 3D solvers and simplified models, and their validation based on experimental measurements. A salient point of the overview is considering the DCR impact on reliability aspects, risk estimation, real-time calculations, forecasting, and planning with different time horizons.

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Multiphysics approach to the boundary problems of power engineering and their application to the analysis of load-carrying capacity of power cable line

Cited by 9 publications

References 9 publications

Analysis on the Temperature Field and the Ampacity of XLPE Submarine HV Cable Based on Electro-Thermal-Flow Multiphysics Coupling Simulation

Analysis on the Temperature Field and the Ampacity of XLPE Submarine HV Cable Based on Electro-Thermal-Flow Multiphysics Coupling Simulation

A Multiphysics Analysis of Coupled Electromagnetic-Thermal Phenomena in Cable Lines

Concepts and Methods to Assess the Dynamic Thermal Rating of Underground Power Cables

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