A 3-D study of eddy current field and temperature rises in a compact bus duct system

Ho, S. L.; Li, Y.; Lin, Xin; Wong, Hie Hua; Cheng, Ka Wai Eric

doi:10.1109/tmag.2006.871632

Cited by 24 publications

(10 citation statements)

References 9 publications

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“…According to the Maxwell's equations, quasi-static magnetic field can be solved by governing equations using magnetic vector potential shown as below [7][8][9] ∇×v∇×A −∇v∇…”

Section: Magnetic Field Analysismentioning

confidence: 99%

“…Hot‐spot temperature distribution in an 300 KVA and 22.5 MVA ONAN transformer is calculated, during which energy (thermal) equation is solved until temperature is obtained, and oil parameters such as thermal conductivity, special heat, viscosity and density change with temperature [6]. Researchers studied temperature rise of an air insulated bus duct system with a 3D‐eddy‐current field model, and simulation results matched well with measured results [7, 8]. Some scholars did great works on air‐cooled induction motors with a 3D coupled electromagnetic‐fluid‐thermal method and proposed a novel multi‐component fluid model to deal with the influence of rotor rotation upon the air convection [9].…”

Section: Introductionmentioning

confidence: 99%

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Temperature rise of a dry‐type transformer with quasi‐3D coupled‐field method

Liu

Ruan

Wen

et al. 2016

IET Electric Power Applications

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A quasi-3D coupled-field method is introduced and applied on a ventilated dry-type transformer to study temperature rise of windings in this study. A simplified 3D model was first established to calculate energy loss of core and velocity distribution in a plane above the lower yoke. Then two accurate 2D models were built up to figure out energy losses in the windings. With a combination of indirect and sequential coupling, energy losses of both windings and core were used as heat source, and velocities for both 2D models were applied as boundary condition for analysing fluid-thermal field. Final results of temperature rise were calculated with temperature rise of two 2D models. In the end, numerical results were compared with experimental data to prove the effectiveness of this method.

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“…According to the Maxwell's equations, quasi-static magnetic field can be solved by governing equations using magnetic vector potential shown as below [7][8][9] ∇×v∇×A −∇v∇…”

Section: Magnetic Field Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Temperature rise of a dry‐type transformer with quasi‐3D coupled‐field method

Liu

Ruan

Wen

et al. 2016

IET Electric Power Applications

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“…[4,6,7]. In the study, a coupled magneto-thermal-flow 3-D FEM is used to investigate the thermal properties of EHV GIS busbar in steady-state.…”

Section: -D Simulation Modelmentioning

confidence: 99%

“…In recent years, There are many previous works which have researched the EHV GIS busbar technology in many respects, such as analysis of eddy current and thermal fields [5][6][7], temperature distribution inside of busbar [8], [9]. Kim [10], et al presented the coupled analysis method between the magnetic field and thermal field to calculate the temperature rise in a GIS busbar.…”

Section: Introductionmentioning

confidence: 99%

A 3-D Steady-State Analysis of Thermal Behavior in EHV GIS Busbar

Jin¹,

Zhang²,

Wu³

et al. 2016

Journal of Electrical Engineering and Technology

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-Busbar has been used as electric conductor within extra high voltage (EHV) gas insulated switchgear (GIS), which makes EHV GIS higher security, smaller size and lower cost. However, the main fault of GIS is overheating of busbar connection parts, circuit breaker and isolating switch contact parts, which has been already restricting development of GIS to a large extent. In this study, a coupled magneto-flow-thermal analysis is used to investigate the thermal properties of GIS busbar in steady-state. A three-dimensional (3-D) finite element model (FEM) is built to calculate multiphysics fields including electromagnetic field, flow field and thermal field in steady-state. The influences of current on the magnetic flux density, flow velocity and heat distribution has been investigated. Temperature differences of inner wall and outer wall are investigated for busbar tank and conducting rod. Considering the end effect in the busbar, temperature rise difference is compared between end sections and the middle section. In order to obtain better heat dissipation effect, diameters of conductor and tank are optimized based on temperature rise simulation results. Temperature rise tests have been done to validate the 3-D simulation model, which is observed a good correlation with the simulation results. This study provides technical support for optimized structure of the EHV GIS busbar.

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“…The temperature rises are evaluated using the coupled fluid field and the thermal field model [1]. A compact bus duct system governing equations are used to determine the temperature rises [2]. Power losses of a bus bar are calculated by the magnetic field analysis and those values are used as the input data for the thermal analysis to predict the temperature [3].…”

Section: Introductionmentioning

confidence: 99%

Prediction and comparison of size of the copper and aluminium bus duct system based on ampacity and temperature variations using MATLAB

Thirumurugaveerakumar¹,

Sakthivel²,

Sharmila³

2018

THERM SCI

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The main objective of this paper is to propose an algorithm to predict and compare the sizes of the bus bar with materials like copper and aluminum by considering the allowable ampacity and allowable temperature rise with natural and forced convection cooling arrangement. Theoretical analysis is carried out with modified size of the copper bus bar using MATLAB, to analyze the ampacity and temperature variation under the natural and forced convection mode. The algebraic equation developed from thermal model is solved using MATLAB for the determination of the allowable temperature rise and ampacity of rectangular-section bus bars of copper and aluminum and also for different sizes of bus bar. An algorithm has been developed for the analysis. Experimental observations of temperature variation in copper bus bar with standard size under natural and forced cooling mode are validated with the algebraic equation developed from thermal model is solved using MATLAB. It is concluded that bus bar dimensions are compared for the materials copper and aluminum to predict the suitable equivalent dimensions for the same ampacity level and within the allowable temperature rise to reduce the cost of panel.

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A 3-D study of eddy current field and temperature rises in a compact bus duct system

Cited by 24 publications

References 9 publications

Temperature rise of a dry‐type transformer with quasi‐3D coupled‐field method

Temperature rise of a dry‐type transformer with quasi‐3D coupled‐field method

A 3-D Steady-State Analysis of Thermal Behavior in EHV GIS Busbar

Prediction and comparison of size of the copper and aluminium bus duct system based on ampacity and temperature variations using MATLAB

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