Numerical multiphysics modeling of temperature rises in gas insulated busbars

Rebzani, Nesrine; Clavel, Édith; Marty, Philippe; Morin, Aurélie

doi:10.1109/tdei.2016.7736815

Cited by 28 publications

(12 citation statements)

References 13 publications

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“…When dealing with the convective heat transfer inside the GIL, the first step is to confirm whether the laminar flow or turbulent flow model should be applied. Both flow models were proposed in the simulation of GIS/GIL [8,10,12]. Thus, in this study, the analysis was conducted on the flow characteristics.…”

Section: Turbulent Flowmentioning

confidence: 99%

“…H. Koch et al presented a numerical study of the natural convection in a horizontal annulus of GIL and discussed the influence of the Rayleigh number and radius ratio on the heat transfer and fluid motion characteristics [8]. The effect of the eddy current on the temperature rise of the GIS busbar was studied using the coupled magnetothermal finite element analysis method [9,10]. Further, B. Novák et al conducted simulations dealing with the temperature distribution in a three-phase GIS busbar considering the influence of the eddy current [11].…”

Section: Introductionmentioning

confidence: 99%

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Temperature and Electric Field Distribution Characteristics of a DC-GIL Basin-Type Spacer with 3D Modelling and Simulation

Wan

Shan

et al. 2021

Energies

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The temperature properties of real-type direct-current gas-insulated transmission lines (DC-GIL) with a basin-type spacer were investigated by the finite element method in this paper. A horizontally installed model was established and the temperature distribution was obtained with a 3D model. The specific heat capacity and thermal conductivity of the spacer were measured and applied in the simulation. The results show that the temperature of the convex surface was slightly higher than that of the concave surface. With an increase in the SF6 pressure, the temperature of the spacer decreased, which can be attributed to the improvement of convection due to increases in the heat capacity per unit volume. With an increase in the ambient temperature, the temperature of the spacer increased linearly. The temperature difference between the inner and outer parts of the spacer increased with increases in the load current. Besides, an obvious increase in the surface electric field strength appeared under the influence of the thermal gradient compared to the results without the thermal gradient. Thus, special attention should be paid to the insulation properties of the spacer considering the influence of temperature distribution. This study evaluates both the thermal and insulation characteristics of the GIL along with the spacer under various conditions.

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Section: Turbulent Flowmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Temperature and Electric Field Distribution Characteristics of a DC-GIL Basin-Type Spacer with 3D Modelling and Simulation

Wan

Shan

et al. 2021

Energies

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“…Such as the solid and liquid dielectric breakdown process, the work is complicated enough that the universal law applicable to all liquid dielectric is unclear, nor failed to find the breakdown laws for the solid dielectric yet. Therefore, there are many problems to be explored in the subject of high voltage technology, which also brings a lot of fun to the teaching of high pressure technology [5][6]. Only with thinking and exploring, one can make long-term progress in the study of high voltage technology.…”

Section: Imperfect Theory and The Great Space For Explorationmentioning

confidence: 99%

The Research on GIS Substation and Teaching Reform of High Voltage Technology

Li¹,

Yang²

2018

Proceedings of the 2018 2nd International Conference on Education Science and Economic Management (ICESEM 2018)

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The relationship between scientific research and teaching is one of the topics worthy of discussion in the reform of college curriculum teaching. Scientific research can be carried out around teaching to serve teaching better. In the teaching and learning of high voltage technology, the promotion achieved by scientific research is particularly important. The insulation characteristics of GIS substation serves as an important part of high voltage technology teaching, and the research of it plays an significant role in promoting and deepening the teaching of high voltage technology course. This reflects the idea of combining teaching and research, stimulating scientific research through teaching and advancing teaching through scientific research. Taking the GIS substation research as an example, this paper illustrates the role of scientific research in the teaching of high voltage technology.

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“…Recently, high voltage VCBs with permanent magnetic actuators which could interrupt the current in a shorter period than the SF 6 circuit breakers due to their high reliability and controllability are attracted substantial attention [1]- [4]. In HV VCBs, the heating problem is more severe than those filled with oil or air, because the contact conductors are enveloped in a well-sealed vacuum chamber where the heat produced at the contact dissipates through the top and bottom conductors [5]. In order to avoid the overheating inside the VCBs, designers should pay attention to its heat production and transfer mechanism [6].…”

Section: Introductionmentioning

confidence: 99%

“…The conductors sealed in a vacuum chamber are supposed to have the highest temperature, but their temperature is hard to measure and also influenced by the heat conduction and convection of SF 6 . Moreover, the related international standards including IEC and ANSI limit that the temperature-rise of the various parts of the power equipment should not exceed its specified values, and the regulations are becoming stricter for new products especially for the compact metal encapsulated devices [5]. Excessive temperature elevation results in aging or even thermal destruction of the components [7].…”

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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Numerical multiphysics modeling of temperature rises in gas insulated busbars

Abstract: International audienc

Cited by 28 publications

References 13 publications

Temperature and Electric Field Distribution Characteristics of a DC-GIL Basin-Type Spacer with 3D Modelling and Simulation

Temperature and Electric Field Distribution Characteristics of a DC-GIL Basin-Type Spacer with 3D Modelling and Simulation

The Research on GIS Substation and Teaching Reform of High Voltage Technology

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

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