Thermal modeling and experimental validation of an encapsulated busbars system

Popa, Iolanda Valentina; Dolan, Alin-Iulian; Ghindeanu, Doina; Boltasu, Catalin

doi:10.1109/siela.2014.6871884

Cited by 13 publications

(5 citation statements)

References 3 publications

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“…Table IV shows the evolution of temperature for conductor and shield in short-circuit regime. The presented numerical model and analytical method were validated experimentally for a system of single-phase busbar execution [2]. …”

Section: Numerical Resultsmentioning

confidence: 99%

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Magneto-thermal modeling of an encapsulated busbars system with common shield

Popa

Dolan

2014

2014 International Conference on Applied and Theoretical Electricity (ICATE)

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In this paper, we propose an approach for the magnetic and thermal modeling of an encapsulated busbars system, in three-phase execution, for high voltage using QuickField software. The paper proposes a numerical model developed by coupling of the magnetic field problem with the stationary and transient heat field problems for the geometry of a three-phase execution busbars system with common shield. The coupling of problems is realized by importing specific losses from the magnetic field problem as heat sources for thermal field problem. The magnetic field problem is also coupled to the electrical circuit. The electrodynamic forces that occur between conductors in the presence of the ferromagnetic shield have different values compared to those that occur in an unshielded system. In the model it was taken into account the variation of electrical conductivity with the temperature. The global heat transfer coefficient by convection and radiation used in thermal model was estimated using the power losses computed by magnetic model. When evaluating the global heat transfer coefficient was taken into account the temperature dependence of the physical properties of the air. There is a good agreement between numerical and analytical temperature values. The presented model can be used for analysis, design and optimization of three-phase busbars system with common shield.

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Section: Numerical Resultsmentioning

confidence: 99%

“…There are two types of construction [1], [2], [7]: -Single phase execution with short-circuited shields at both ends and connected to ground [7] or with interrupted by segments shield and connected to ground; -Three-phase execution, with a common grounded shield (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

Magneto-thermal modeling of an encapsulated busbars system with common shield

Popa

Dolan

2014

2014 International Conference on Applied and Theoretical Electricity (ICATE)

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“…The share of heat losses by lifting and radiation depends on the geometrical dimensions of the rail system. In general, the proportion of convection decreases for smaller conductors, while it increases for larger structures [20].…”

Section: Introductionmentioning

confidence: 89%

Thermal Analysis of Heat Distribution in Busbars during Rated Current Flow in Low-Voltage Industrial Switchgear

2021

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The manuscript presents advanced coupled analysis: Maxwell 3D, Transient Thermal and Fluent CFD, at the time of a rated current occurring on the main busbars in the low-voltage switchgear. The simulations were procured in order to aid the design process of such enclosures. The analysis presented the rated current flow in the switchgear busbars, which allowed determining their temperature values. The main assumption of the simulation was measurements of temperature rise during rated current conditions. Simulating such conditions is a valuable asset in order to design better solutions for energy distribution gear. The simulation model was a precise representation of the actual prototype of the switchgear. Simulations results were validated by experimental research. The heat dissipation in busbars and switchgear housing through air convection was presented. The temperature distribution for the insulators in the rail bridge made of fireproof material was considered: halogen-free polyester. The results obtained during the simulation allowed for a detailed analysis of switchgear design and proper conclusions in practical and theoretical aspects. That helped in introducing structural changes in the prepared prototype of the switchgear at the design and construction stages. Deep analysis of the simulation results allowed for the development concerning the final prototype of the switchgear, which could be subjected to the full type tests. Additionally, short-circuit current simulations were procured and presented.

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“…Different software can be used for modeling the busbars. In [14] Quich Field software is used for modeling an encapsulated busbar for high voltage, by considering coupling the magnetic field aspects with heat aspects both in stationary and in transient regimes. Opera 2D software can be also used to estimate the distribution of the temperature in three-phase busbar system, as in [15].…”

Section: Introductionmentioning

confidence: 99%

Thermal Analysis of Busbars from a High Current Power Supply System

Pleşca

2019

Energies

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Copper busbar technology is widely used with the aim to achieve electrical connections with power distribution systems because of their flexibility and compactness. The thermal analysis takes into account the heat conduction and convection of a copper busbar system used to supply a test bench with high currents in order to check the electro-thermal behaviour of power circuit breakers during overload and short circuit conditions. This paper proposes a mathematical model for busbars used within a high current power supply. The obtained thermal model can be used to analyse the thermal behaviour of busbars in steady-state conditions at different values of the electric current, cross-section and length of the busbar. Also, the mathematical model allows to calculate the temperature distribution along the busbar at different values of the contact resistances at junction points with other conductors. There is a good correlation between calculated, simulated and experimental results.

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Thermal modeling and experimental validation of an encapsulated busbars system

Cited by 13 publications

References 3 publications

Magneto-thermal modeling of an encapsulated busbars system with common shield

Magneto-thermal modeling of an encapsulated busbars system with common shield

Thermal Analysis of Heat Distribution in Busbars during Rated Current Flow in Low-Voltage Industrial Switchgear

Thermal Analysis of Busbars from a High Current Power Supply System

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