Application of computational fluid dynamics tools to circuit-breaker flow analysis

Trépanier, Jean‐Yves; Zhang, X.D.; Pellegrin, H.; Camarero, R.

doi:10.1109/61.400848

Cited by 19 publications

(3 citation statements)

References 15 publications

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“…S rad in Eq. ( 13) represents the heat loss through radiation in the thermal arc region and a model reported in the work of Zhang (9) and Trepanier (10) are used. In this radiation model included in the hydrodynamic approach, re-absorption of radiation in the outer layers of the arc, as opposed to the easy to model optically thin radiation (no re-absorption, all radiation escapes from the plasma) is included.…”

Section: Modeling Of Arc Plasma Phenomenamentioning

confidence: 99%

Studies on Fluid-Plasma Interaction Associated with Basic Gas Blast Characteristics based on a High-Order LES Turbulence Model

et al. 2013

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In reducing the operating energy thermal puffer type gas circuit breaker is very advantageous. However a detail understanding of the basic fluid-plasma interaction phenomena associated with the gas blast characteristics is very much necessary for its efficient design. Therefore the main aim of this research is to study the basic fluid-plasma interaction phenomena based on a High-Order LES (Large Eddy Simulation) turbulence model. The model configuration used in this regard is a converging-diverging type nozzle installed with an anode and a cathode inside to generate thermal arc plasma in the nozzle flow field. Here, the basic physics associated with the reduction of arc diameter due to interaction of supersonic cooler gas with the thermally expanded hot core gas and related heat transfer through turbulent mixing is discussed. The results revealed that as more and more denser cooler gas entrain to the low density hotter core gas the arc region starts growing axially downstream the region of reduced arc diameter. However near the shock location in the nozzle an abrupt change in temperature distribution is observed.

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Section: Modeling Of Arc Plasma Phenomenamentioning

confidence: 99%

Studies on Fluid-Plasma Interaction Associated with Basic Gas Blast Characteristics based on a High-Order LES Turbulence Model

et al. 2013

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“…Circuit breakers are important equipment for power system fault protection, which will disconnect the contacts and remove the affected line when they sense overvoltage, a high current during normal operation and fault [1][2][3][4][5]. According to the analysis of circuit breaker breakdown accidents caused by lightning strikes in many places, after experiencing a lightning-induced trip, if the circuit breaker undergoes a lightning strike again during hot standby reclosure [6][7][8][9][10], a wave will undergo total reflection at the gap break of the dynamic and static contacts, generating a doubling of the lightning overvoltage and superimposing it on the industrial frequency power transmission voltage [11][12][13][14][15], causing the overall overvoltage level to exceed the insulation level of the circuit breaker's opening gap, resulting in the breakdown of the circuit breaker's gap [16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Characterization of the Airflow Distribution near a Circuit Breaker’s Cu-Ag-Alloy Electrode Surface during and after Breakdown

Sun,

Shao,

Zhang

et al. 2024

Coatings

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Circuit breakers, affected by multiple lightning strikes after the breaker has been tripped, can break down again, which will reduce the life of the circuit breaker and threaten the stable operation of the power system. Aiming at this problem, this research obtained the temperature diffusion process of the inrush current process of the circuit breaker’s opening and breaking, using the Schlieren technique combined with existing image recognition technology to obtain the temperature characteristics of the airflow in the air gap of the contact, as well as the characteristics of the flow of air itself. The results of the study show that the circuit breaker breakdown process generates a shock wave with a velocity approximately equal to the speed of sound under the same conditions. The maximum velocity of the airflow boundary diffusion is about one-quarter of the speed of sound under the same condition, and it decays very fast, reducing to the airflow drift velocity within 10 ms after breakdown. The maximum temperature of the thermals is concentrated between 6000 K and 8000 K, and the temperature change is approximately inversely proportional to the square of the time. This research provides the basis for the design of a circuit breaker’s contact structure, opening speed optimization method, interrupter chamber, and insulation design optimization.

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“…There have been many papers devoted to the simulation of the arcing process in an auto-expansion CB in the past 15 which focuses on the ablation of the nozzle and contacts, the pressure in the expansion volume, and the arc phenomenon and flow in the interrupter [5]- [9]. These effects on the arc characteristics were evaluated according to the simulation results of arc behavior under the condition of given arcing current waveforms where the dc component was ignored.…”

Section: Introductionmentioning

confidence: 99%

Influence of DC Component of Short-Circuit Current on Arc Characteristics During the Arcing Period

Zhang

Lan

Tian

2014

IEEE Trans. Power Delivery

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The arcing processes of the short-circuit current with a significant dc component have been simulated under the long and short arcing time conditions, respectively, for an auto-expansion circuit breaker based on an MHD arc model. The influences of the dc component are investigated compared with cases where the dc component is negligible. The results show that the arc temperature, pressure, and radius as well as the pressurization in the expansion volume are increased significantly under the second current peak gone up by the dc component and long arcing time condition. However, the arc temperature at the final current zero becomes high in the current peak and is reduced by the dc component and short arcing time cases. Thus, the dc component would not be ignored in the interrupting investigation and in the design of the interrupter.

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Application of computational fluid dynamics tools to circuit-breaker flow analysis

Cited by 19 publications

References 15 publications

Studies on Fluid-Plasma Interaction Associated with Basic Gas Blast Characteristics based on a High-Order LES Turbulence Model

Studies on Fluid-Plasma Interaction Associated with Basic Gas Blast Characteristics based on a High-Order LES Turbulence Model

Characterization of the Airflow Distribution near a Circuit Breaker’s Cu-Ag-Alloy Electrode Surface during and after Breakdown

Influence of DC Component of Short-Circuit Current on Arc Characteristics During the Arcing Period

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