Dynamic Thermal Analysis of High-Voltage Power Cable Insulation for Cable Dynamic Thermal Rating

Wang, Pengyu; Ma, Hui; Liu, Gang; Han, Zhuozhan; Guo, Deming; Xu, Tao; Kang, Longyun

doi:10.1109/access.2019.2913704

Cited by 49 publications

(18 citation statements)

References 18 publications

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“…By modelling heat flow with a current in the electric analogy, the different node voltages inherently model the temperatures. Then, the dynamics of the thermal circuit can be represented by using ordinary differential equations [65,66]. The electrothermal approach can be easily extended to model several single-core cables or multicore cables, taking into account the mutual location of the different cores, the presence of further jacketing, and the position of all the cables inside the ducts.…”

Section: Power Cable Modellingmentioning

confidence: 99%

“…In particular, a representation of the soil is proposed [58], and the presence of other cables in proximity has been considered and modelled [129]. An improved thermal model proposed for the transient temperature calculation in [66] is based on the approximate solution for the Van Wormer coefficient, treated as a time-varying variable. To better represent the soil thermal response, a non-concentric soil layer model is proposed in [71].…”

Section: Real Time Dcrmentioning

confidence: 99%

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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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Section: Power Cable Modellingmentioning

confidence: 99%

Section: Real Time Dcrmentioning

confidence: 99%

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

et al. 2021

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“…The permanents of XLPE-0 were used to construct the following simulation model. The establishment of thermal field model and determination of the boundary conditions are not the highlight in this paper, the detail can be referred to literature [25][26][27].…”

Section: Simulation Of Different Laying Modes Of Cablesmentioning

confidence: 99%

Thermal Effect of Different Laying Modes on Cross-Linked Polyethylene (XLPE) Insulation and a New Estimation on Cable Ampacity

et al. 2019

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This paper verifies the fluctuation on thermal parameters and ampacity of the high-voltage cross-linked polyethylene (XLPE) cables with different insulation conditions and describes the results of a thermal aging experiment on the XLPE insulation with different operating years in different laying modes guided by Comsol Multiphysics modeling software. The thermal parameters of the cables applied on the models are detected by thermal parameter detection control platform and differential scanning calorimetry (DSC) measurement to assure the effectivity of the simulation. Several diagnostic measurements including Fourier infrared spectroscopy (FTIR), DSC, X-ray diffraction (XRD), and breakdown field strength were conducted on the treated and untreated specimens in order to reveal the changes of properties and the relationship between the thermal effect and the cable ampacity. Moreover, a new estimation on cable ampacity from the perspective on XLPE insulation itself has been proposed in this paper, which is also a possible way to judge the insulation condition of the cable with specific aging degree in specific laying mode for a period of time.Energies 2019, 12, 2994 3 of 22 insulation endured the most severe electrical and thermal stresses. These obtained specimens were all cleaned by alcohol to remove the surface impurities.

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“…Cable joints are among the most important factors affecting the maximum current carrying value of cables [7]. In order to place transmission lines, which are used especially in high voltage, under ground cable parameters [8] and environmental parameters are determined [9]. In addition, electrical field control was made at connection points and ends of these cables [10,11].…”

Section: Introductionmentioning

confidence: 99%

Electrical-Thermal-Mechanical Analysis of Cable Connection with Screw-Connected Terminal Strips Using Finite Element Method

Tosun

Aksoy

2021

Sakarya University Journal of Computer and Information Sciences

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Electric energy passes through many stages from production to usage, and many electrical connections take place at these stages. Electrical connections are quite important for system safety and electrical energy quality. In this study, current-temperature relationship in the cable was investigated in cable joints made with screw connection terminals, depending on torque applied to screw. In numerical solution of the problem, Comsol Multiphysics program based on Finite Element Method was used first, the screw-conductor interface was investigated based on applied torque, and then electrical-thermal analysis was performed on this geometry. Experimental studies were carried out to demonstrate accuracy of digital model, and conductors and terminals used in household installations were taken into account in these studies. Amount of deformation of conductors depending on torque applied to screw and its effect to current carrying capacity of these terminals having screw connection were investigated. In this study, the appropriate torque value is 0.4 Nm, and the maximum temperature value is 45 o C on contact surface. Also, it has been shown that the optimum torque value to be applied in the copper conductor cable joint with 1.5 mm 2 cross section area is 0.4 Nm.

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Dynamic Thermal Analysis of High-Voltage Power Cable Insulation for Cable Dynamic Thermal Rating

Cited by 49 publications

References 18 publications

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

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

Thermal Effect of Different Laying Modes on Cross-Linked Polyethylene (XLPE) Insulation and a New Estimation on Cable Ampacity

Electrical-Thermal-Mechanical Analysis of Cable Connection with Screw-Connected Terminal Strips Using Finite Element Method

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