Thermal Assessment of Power Cables and Impacts on Cable Current Rating: An Overview

Enescu, Diana; Colella, Pietro; Russo, Angela

doi:10.3390/en13205319

Cited by 30 publications

(29 citation statements)

References 109 publications

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“…The thermal stability of electrical conductors / cables represents their ability to withstand, for a limited time and without visible damage, the thermal stress produced by short-circuit currents [9].…”

Section: Methods For Monitoring Thermal Stresses For Electrical Cablesmentioning

confidence: 99%

Methods of Temperature Monitoring in Low Voltage Electrical Cables using Composite Materials

Draghici

Maria

2021

MATEC Web Conf.

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The article presents the most important methods and technologies used to monitor the temperature of low voltage power supply cables, which supply 400V in three-phase mode, trying to highlight the method of using composite materials, materials that are included in the material constructive of the cables, these having the role of temperature sensor. Temperature monitoring is performed along the electrical cables, to transmit in real time information on the evolution of temperatures along the entire length of the cable, at any point, during their entire life. The article will focus on the method of inserting optical fibres inside the power supply cables, which will be used as a temperature measuring instrument. Using the Reman effect, a method of reflecting the injected light at one end of the optical fibre, by processing the received signals, the evolution of the temperature inside the electric cable can be detected with great precision, over long distances and with great accuracy. the evolution of the temperature inside the electric.

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Section: Methods For Monitoring Thermal Stresses For Electrical Cablesmentioning

confidence: 99%

Methods of Temperature Monitoring in Low Voltage Electrical Cables using Composite Materials

Draghici

Maria

2021

MATEC Web Conf.

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“…Furthermore, water flows under the pressure gradient and the gravity phenomenon [26]. The basic heat-transfer concepts used to assess power cable rating have been summarised in [21].…”

Section: Thermal Phenomena In Soil For Buried Power Cablesmentioning

confidence: 99%

“…• the heat sources insulation around the power cable; • mounting a forced cooling system in the hot-spot zone; • corrective backfill incorporation having high thermal conductivity; • the utilisation of the insulating fluid that flows inside the power cable, useful for the power cable cooling; • the forced convection for the fluid flows around the power cable [21,47].…”

Section: Soil Thermal Conductivitymentioning

confidence: 99%

“…The thermal behaviour of the buried power cable depends on the thermal parameters of the power cable materials, cable loading conditions, heat-transfer properties of the environment, soil surrounding, and boundary conditions [20]. The current rating determination requires a thermal analysis of the power cable, where thermal properties of the power cable materials and soil, the heat sources in the soil and the cable, and the heat dissipation mechanisms are modelled and estimated [21].…”

Section: Introductionmentioning

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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“…From the literature review it follows that the analysis of coupled electromagnetic and thermal fields for simpler geometries at in-door conditions has been considered by several authors. It should however be remarked that in practice much more attention is paid to the analysis of buried cables [3,7,10,16].…”

Section: Introductory Remarksmentioning

confidence: 99%

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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Thermal Assessment of Power Cables and Impacts on Cable Current Rating: An Overview

Cited by 30 publications

References 109 publications

Methods of Temperature Monitoring in Low Voltage Electrical Cables using Composite Materials

Methods of Temperature Monitoring in Low Voltage Electrical Cables using Composite Materials

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

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

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