Modelling of Dynamic Transmission Cable Temperature Considering Soil-Specific Heat, Thermal Resistivity, and Precipitation

Olsen, Rasmus; Anders, G.J.; Holboell, Joachim; Gudmundsdottir, Unnur Stella

doi:10.1109/tpwrd.2013.2263300

Cited by 78 publications

(65 citation statements)

References 14 publications

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“…Nevertheless, after taking into consideration this fact, the values of the set U will be greater given a set T . This point is modelled by means of Dynamic Cable Rating (DCR) techniques [22], and can be incorporated to the mathematical program as well. The cables capacity must be assessed in terms of calculated maximum conductor temperature, and the maximum allowable value by design (usually considered 90 • C).…”

Section: B Cable Capacitymentioning

confidence: 99%

Global Optimization of Offshore Wind Farm Collection Systems

Pérez-Rúa

Stolpe

Das

et al. 2020

IEEE Trans. Power Syst.

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A mathematical program for global optimization of the cable layout of Offshore Wind Farms (OWFs) is presented. The model consists on a Mixed Integer Linear Program (MILP). Modern branch-and-cut solvers are able to solve large-scale instances, defined by more than hundred Wind Turbines (WTs), and a reasonable number of Offshore Substations (OSSs). In addition to the MILP model to optimize total cable length or initial investment, a pre-processing strategy is proposed in order to incorporate total electrical power losses into the objective function. High fidelity models are adapted to calculate cables current capacities, spatial currents. The MILP model is embedded in an iterative algorithmic framework, consisting in solving a sequence of problems with increasing size of the search space. The search space is defined as a set of underlying candidate arcs. The applicability of the method is illustrated through 10 case studies of real-world large-scale wind farms. Results show that: (i) feasible points can quickly be obtained in minutes, (ii) points near the global optimum with an imposed maximum tolerance, are calculable in reasonable computational time in the order of hours, and (iii) the proposed method compares favorably against a state-of-the art method available in literature.

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Section: B Cable Capacitymentioning

confidence: 99%

Global Optimization of Offshore Wind Farm Collection Systems

Pérez-Rúa

Stolpe

Das

et al. 2020

IEEE Trans. Power Syst.

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“…A model that reproduces accurately (1) for one cable has been reported in [20], [21] and was optimized in [22]. Essentially, these models suggest that when only one cable is under analysis, the surrounding soil can be modeled with a RC electro-thermal equivalent ladder model; see Fig.…”

Section: Proposed Modelmentioning

confidence: 99%

“…As it is explained in [21] and [22], the values of (thermal capacitances) are calculated also taking into account the geometry of each soil layer that is used to calculate (see Appendix for further details). The model can be enhanced if the same framework is used to consider the effects of mutual heating from the neighboring cables.…”

Section: Proposed Modelmentioning

confidence: 99%

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Introducing Mutual Heating Effects in the Ladder-Type Soil Model for the Dynamic Thermal Rating of Underground Cables

Diaz‐Aguiló¹,

León²

2015

IEEE Trans. Power Delivery

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The proper modeling of the transient thermal behavior of mutual heating effects between underground power cables is very important for the rating of transmission and distribution cables. The IEC standards propose an accurate model based on exponential integrals that it can be difficult to implement in basic electrical software. The model is not consistent with the layered modeling of the cable thermal resistances. In this paper a simple and easy-to-use alternative model is presented. It consists of injecting the correct current at the right position of the RC circuit representing the soil. The new model can reproduce accurately the full physics of the transient phenomenon and is consistent with the modeling of the cable used in the IEC standards themselves. The new model is tested and validated against numerous finite elements simulations for realistic cable installations.

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“…The internal defects of cable joints are the main cause of explosions in cable joints. Explosions of cable joints happen due to internal defects that cause changes in the physical fields of cable joints, including electromagnetic fields [4,5], temperature fields [6,7] and stress fields [8][9][10]. Therefore, in order to protect the cable joints and avoid cable joint accidents, especially explosions, it is important to analyze the electromagnetic-thermal-mechanical characteristics of cable joints under internal defect conditions and find methods to evaluate the internal defects of cable joints [11].…”

Section: Introductionmentioning

confidence: 99%

The Coupling Fields Characteristics of Cable Joints and Application in the Evaluation of Crimping Process Defects

Yang

Cheng³

et al. 2016

Energies

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Abstract:The internal defects of cable joints always accelerate the deterioration of insulation, until finally accidents can arise due to the explosion of the joints. The formation process of this damage often involves changes in the electromagnetic, temperature and stress distribution of the cable joint, therefore, it is necessary to analyze the electromagnetic-thermal-mechanical distribution of cable joints. Aiming at solving this problem, the paper sets up a 3-D electromagnetic-thermal-mechanical coupling model of cable joints under crimping process defects. Based on the model, the electromagnetic losses distribution, temperature distribution and stress distribution of a cable joint and body are calculated. Then, the coupling fields characteristics in different contact coefficient k, ambient temperature T amb and load current I were analyzed, and according to the thermal-mechanical characteristics of a cable joint under internal defects, the temperature difference ∆T f and stress difference ∆σ f of cable surface are applied to evaluate the internal cable joint defects. Finally, a simplified model of the cable joint is set up to verify the accuracy of the coupling field model proposed in this paper, which indicates that the model can be used to analyze the coupling fields characteristics of cable joints and the method can be applied to evaluate crimping process defects of cable joints.

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Modelling of Dynamic Transmission Cable Temperature Considering Soil-Specific Heat, Thermal Resistivity, and Precipitation

Cited by 78 publications

References 14 publications

Global Optimization of Offshore Wind Farm Collection Systems

Global Optimization of Offshore Wind Farm Collection Systems

Introducing Mutual Heating Effects in the Ladder-Type Soil Model for the Dynamic Thermal Rating of Underground Cables

The Coupling Fields Characteristics of Cable Joints and Application in the Evaluation of Crimping Process Defects

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