Application of Computational Fluid Dynamics to Reduce the New Product Development Cycle Time of the ${\rm SF}_{6}$ Gas Circuit Breaker

Pawar, Siddhesh; Joshi, K.; Andrews, L.; Kale, S.

doi:10.1109/tpwrd.2011.2170711

Cited by 36 publications

(11 citation statements)

References 14 publications

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“…For this reason, the dielectric strength of SF 6 gas is 2.5 times higher than air. Many researches have been done to analyze the temperature rise of SF 6 -insulated equipment [7]- [9], in these simulations the physical property of SF 6 is set as constant which means ignoring the influence of temperature on the SF 6 gas. During the operation of the SF 6 -insulated equipment, the SF 6 gas will be heated by the heat convection of the conductors which can leads to obvious temperature rise and change of physical property.…”

Section: Physical Characteristics Of Sf 6 Gasmentioning

confidence: 99%

“…In the simulation, the Nusselt number is assumed constant and model geometry is applied to calculate the heat-transfer coefficients on the boundaries. With Ansys and CFX coupling, Pawar et al [7] presented a simulation to analyze the temperature distribution of a high-voltage SF 6 insulated circuit breaker in 2012. They conducted simulations under 1000A and 2000A rated current and verified the simulations with experiments.…”

Section: Introductionmentioning

confidence: 99%

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Temperature Rise Simulation of Medium Voltage Cubicle Type Gas Insulated Switch-Gear Based on Coupling of Multi-Physical Fields

Wang

et al. 2019

IEEE Access

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Usage of Cubicle type Gas-Insulator Switch-gear (C-GIS) is gradually increasing in power system. During the operation of C-GIS, long-term excessive temperature rise leads to degeneration of insulation and mechanical property, which may finally leads to fatal accidents. In order to analyze the temperature distribution of the C-GIS, the model of a 40.5 kV medium voltage SF 6 insulated C-GIS has been established and simulations based on electromagnetic-fluid-temperature coupling are carried out. In the simulations, eddy-current filed is solved by ansys-multiphysics to obtain the heat generation inside the C-GIS. In order to improve calculation accuracy, the contact resistance is taken into consideration and the physical characteristics of SF 6 gas are considered to be related to the temperature. First, simulations with and without surrounding air environment considered are carried out and the results are compared. The type test of temperature rise is also conducted to verify the simulation results. The simulation results are found out in agreement with experimental results. Second, in order to reduce the temperature rise and improve the design of C-GIS, recommendations are put forward. The influence of the cooling system and surrounding barriers is analyzed by numerical simulation.INDEX TERMS Temperature rise simulation, cubicle type gas insulated switch-gear, multi-physical fields.

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Section: Physical Characteristics Of Sf 6 Gasmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Temperature Rise Simulation of Medium Voltage Cubicle Type Gas Insulated Switch-Gear Based on Coupling of Multi-Physical Fields

Wang

et al. 2019

IEEE Access

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“…The total current density J is decomposed into source and eddy current densities, the total current I for the conductor of the cross-section area S c can be expressed as [6] Applying the Galerkin method to discrete (1) and (2), the power loss Q in the conductor per unit length can be calculated by [7…”

Section: Finite Element Modelmentioning

confidence: 99%

Magnetic Eddy-Current, Fluid and Thermal Coupled Model for the Finite Element Behavior of Gas-Insulated Bus Bars

Wu¹,

Zhou²,

Pei³

2016

Proceedings of the 2015 4th International Conference on Sensors, Measurement and Intelligent Materials

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This paper describes a coupled magnetic eddy-current, fluid and thermal finite-element model to analyze the steady and transient thermal behavior of a three-phase gas-insulated bus bar (GIB). The magnetic eddy-current field is indirectly coupled into the fluid and thermal fields through the power loss density while considering the temperature dependent electrical conductivity. As a new methodology, multiple species transport technique is introduced into the thermal model using computational fluid dynamics (CFD), circumventing the difficulty of applying temperature and geometry dependent heat transfer coefficient on the model boundaries. Good agreement is found between the CFD and experimental results. The proposed methodology is further used to predict the steady and transient thermal behaviors of the GIB under the effects of various gas pressures, gas types, electrical loads, and ambient temperatures, which provides useful sensitivity information for GIB designers in the product development process.

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“…Dhotre et al [12], [13] used the computational fluid dynamics (CFD) simulation to optimize the structure and reduce the new product development cycle time of the SF 6 gas circuit breaker, and used a thermal model based on ANSYS-CFX to predict the temperature rise of a high voltage SF 6 gas circuit breaker during a heatrun test. Pawar et al [14] presented the coupling of CFD with computational electromagnetics (CE) to analyze the temperature distribution and gas flow of the high voltage SF 6 circuit breaker at different operation current. For VCBs, Lee et al [15] calculated the temperature rise of 72.5 kV VCBs and found that error was less than 10% with both two methods by using the CFD model and thermal network analysis (TNA) method.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Thermal Performance of a 363 kV Vacuum Circuit Breaker Using a 3D Coupled Model

Yang

Gao

et al. 2019

IEEE Access

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Multi-break vacuum circuit breakers (VCBs) are the most potential approach for applying VCBs to high voltage power system. However, it has higher thermal stability requirements than normal single break VCBs due to its complex structure and high rated current. In this paper, a novel 363 kV/5000 A/63 kA SF 6 gas insulate (GI) VCB with series and parallel structure is proposed. To analyze its temperature rise, a 3D coupled electromagnetic-thermal-fluid model is established based on actual size and calculated by finite element method under rated condition, which enables prediction of the temperature distribution of the contacts of VCB and bus bar. In the numerical model, the vacuum chamber is modelled as solid material with temperature dependent effective thermal conductivity while skin effect, nonlinear property of conductor resistivity and turbulence model are taken into consideration. The simulation results show that the hot spot is the contacts of VCB with a temperature of 102.2 K, while the temperature of busbars reach at 92.3 K. In addition, the influences of contact resistance, short circuit current on the temperature rise are discussed. Finally, the simulation results are validated by temperature rise experiment on prototype. Using the proposed model, the temperature rise and hot spot area can be predicted in advance, which could finally facilitate the design and performance evaluation of the 363 kV GI-VCB.INDEX TERMS Vacuum circuit breaker, temperature rise, coupled model, turbulence model, contact resistance.

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Application of Computational Fluid Dynamics to Reduce the New Product Development Cycle Time of the ${\rm SF}_{6}$ Gas Circuit Breaker

Cited by 36 publications

References 14 publications

Temperature Rise Simulation of Medium Voltage Cubicle Type Gas Insulated Switch-Gear Based on Coupling of Multi-Physical Fields

Temperature Rise Simulation of Medium Voltage Cubicle Type Gas Insulated Switch-Gear Based on Coupling of Multi-Physical Fields

Magnetic Eddy-Current, Fluid and Thermal Coupled Model for the Finite Element Behavior of Gas-Insulated Bus Bars

Investigation on the Thermal Performance of a 363 kV Vacuum Circuit Breaker Using a 3D Coupled Model

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