Computational Investigation of Arcing Phenomena in 245 kV Hybrid Circuit Breaker

Liau, Vui Kien; Lee, Byeong Yoon; Song, Ki-Dong; Park, Kyong Yop

doi:10.1143/jjap.46.1674

Cited by 11 publications

(3 citation statements)

References 8 publications

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“…The small pressure variation obtained is only due to the volume variation of the compression volume. The clogging effect, resulting from the plasma properties, cannot alone explain the increase in pressure in the heating volume as suggested in [10]. Fig.…”

Section: B Results For Cases B and Cmentioning

confidence: 91%

“…Experimental and theoretical works have long been performed in real or simplified configurations [3], [5]- [14]. Even when all the parameters that contribute to pressure changes are known, the mechanisms leading to the pressure increase are not really well understood: in some papers, the pressure increase is explained by a flow of hot gas in the heating volume [14], increased by a clogging effect of the arc [10]. In others, it is due to the presence of C 2 F 4 in the heating volume [11].…”

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confidence: 99%

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PTFE Vapor Contribution to Pressure Changes in High-Voltage Circuit Breakers

Gonzalez

Freton

Reichert

et al. 2015

IEEE Trans. Plasma Sci.

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A transient magneto-hydrodynamic model based on @Ansys-Fluent software applied on a high-voltage circuit breaker (HVCB) geometry is presented. The model is turbulent (κ-ε realizable model), and radiation is taken into account by a hybrid model (Discrete Ordinates Method and P1). The insulating medium is SF 6 , and current I rms = 25 kA. An ablation model based on the literature was applied to represent the ablation of the Polytetrafluoroethylene (PTFE) walls. The theoretical and experimental results (pressure, ablation rate, and voltage drop variation) are presented and compared. Several cases were considered: no ablation (ceramic walls), ablation only from downstream parts, and ablation from upstream parts of HVCB walls. The corresponding pressure variations are presented. In order to explain the pressure increase, some additional quantities such as mass flow rate and energy integrated into one section of the heating channel are given. The results show that even if the mass of PTFE ablated is small, the pressure increase is due to the energy input from the vapor.Index Terms-Computational fluid dynamic (CFD) model, heating volume, high-voltage circuit breaker (HVCB), pressure increase, SF 6 and C 2 F 4 vapors.

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Section: B Results For Cases B and Cmentioning

confidence: 91%

mentioning

confidence: 99%

PTFE Vapor Contribution to Pressure Changes in High-Voltage Circuit Breakers

Gonzalez

Freton

Reichert

et al. 2015

IEEE Trans. Plasma Sci.

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show abstract

“…There are a number of recent papers concerning the simulation of the whole high current phase in puffer circuit breakers [8∼10] with varied levels of success. The prediction of pressure in the puffer cylinder agrees reasonably well with measurement if the uncertainties in measurement are taken into account, but the accuracy of arc voltage prediction is often either omitted in the discussion [9,10] or poor [8] . This is possibly caused by inappropriate treatment of arc rooting.…”

Section: Introductionmentioning

confidence: 73%

Numerical Simulation of Gas Flow During Arcing Process for 252 kV Puffer Circuit Breakers

Wu¹,

Wang²,

Ma³

et al. 2011

Plasma Sci. Technol.

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A numerical simulation model for 252 kV puffer circuit breaker is constructed, by using a proven commercial computational fluid dynamics (CFD) package, PHOENICS. The model takes into account the moving parts in the circuit breaker, turbulence enhanced momentum and energy transport, radiation transport. The arcing process in a SF6 puffer circuit breaker with two hollow contacts is simulated under different conditions, and the simulation results are verified with experimental results. Through simulation, the pressure, temperature and velocity in the arc quenching chamber can be obtained. The simulation model is also capable of predicting the influence of design parameters variations on breaker performance, and can thus help to reduce the number of short-circuit tests during the design stage.

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A comparative study of arc behaviour in an auto-expansion circuit breaker with different arc durations

Pei¹,

Zhang²,

Zhang³

et al. 2014

J. Phys. D: Appl. Phys.

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A computational study of the thermal interruption performance of a 145 kV, 60 Hz auto-expansion circuit breaker has been carried out. The pressure peak in the expansion volume has a delay of 2.8-3.4 ms with reference to the current peak when the arc duration varies. A reasonable indicator of the interruption environment is the average mass flux in the main nozzle. The short arc duration case (12.25 ms) is the most difficult case with the lowest critical rate of rise of recovery voltage (RRRV) of 10 kV/μs, just above the initial system applied RRRV of 9 kV/μs. This is a result of insufficient gas flow cross sectional area between the live contact and the main nozzle to develop rapid gas flow for arc cooling. The auxiliary nozzle plays two roles. It provides blockage in the high current phase to reduce gas exhaustion from the main nozzle into the hollow contact; after current zero the hollow contact shares a considerable portion of the system recovery voltage, especially for the short arc duration case (36%). Therefore the proper design and use of an auxiliary nozzle is key to enhancing the thermal interruption capability of high voltage auto-expansion circuit breakers.

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Computational Investigation of Arcing Phenomena in 245 kV Hybrid Circuit Breaker

Cited by 11 publications

References 8 publications

PTFE Vapor Contribution to Pressure Changes in High-Voltage Circuit Breakers

PTFE Vapor Contribution to Pressure Changes in High-Voltage Circuit Breakers

Numerical Simulation of Gas Flow During Arcing Process for 252 kV Puffer Circuit Breakers

A comparative study of arc behaviour in an auto-expansion circuit breaker with different arc durations

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