Optimization of high-voltage self-blast interrupters by gas flow and electric field computations

Sedláček, Jan; Vostracký, Zdeněk; Knobloch, H.; Schramm, H. H.; Wiesinger, Christoph

doi:10.1109/tpwrd.2003.817536

Cited by 34 publications

(11 citation statements)

References 7 publications

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“…Despite the large progress in physical arc modeling [9], black-box models are still used to simulate dynamic arc network interactions due to their low calculation effort [10], [11]. A black-box model is a valuable tool to simulate a dynamic arc in ac or HVdc CBs because the analysis of the current that flows through and the voltage across the electric arc during the period that the current crosses zero gives insight to the CB's ability to handle the interruption of a fault current adequately [12].…”

Section: B Simulation Of Self-oscillation Circuitmentioning

confidence: 99%

DC Circuit Breaker Using Superconductor for Current Limiting

Xiang

Liu

Yanabu

2015

IEEE Trans. Appl. Supercond.

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The unavailability of high-capacity HVdc circuit breakers (CBs) is one of the key stoppers for building HVdc multiterminal networks. As the dc does not have a natural current zero, its interruption is very different. The objective of this paper is to propose a new type of dc CB (DCCB), including a current-limiting part and an interrupting part, which can interrupt a high shortcircuit current. Experimental results show that the currentlimiting part containing superconductor tapes and parallel resistance can limit the fault current from 20 to 1 or 2 kA very quickly within 1 ms. The interrupting part using the selfoscillation method can break this limited current. Therefore, this type of DCCB has the ability of interrupting a high short-circuit current.Index Terms-Direct-current circuit breaker (DCCB), gas circuit breaker (CB), parallel resistance, self-oscillation circuit, superconductor. 1051-8223

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Section: B Simulation Of Self-oscillation Circuitmentioning

confidence: 99%

DC Circuit Breaker Using Superconductor for Current Limiting

Xiang

Liu

Yanabu

2015

IEEE Trans. Appl. Supercond.

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“…The interruption tests and pressure measurement data suggest that for the successful interruption, the pressure increase in the HC at CZ should be high enough and the gas temperature in the upstream region should be low enough to secure the thermal and dielectric interruption capability [3].…”

Section: Slf Interruption Performance Indexmentioning

confidence: 99%

Analysis of SLF Interruption Performance of Self-Blast Circuit Breaker by Means of CFD Calculation

Kim¹,

Chong²,

Lee³

2014

Journal of Electrical Engineering and Technology

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-This paper presents the performance analysis results of a short line fault interruption of a gas circuit breaker, particularly a self-blast type breaker. Hot gas flow analysis was carried out using a CFD calculation combined with the arc model and nozzle ablation model. To evaluate the interruption performance, the index function was defined using the pressure in the heating chamber and the density above the arc region. The simulation and test results showed that the gas flow field and suitable choice of an interruption performance index can be used to predict the interruption characteristics and provide guidelines for designing self-blast breakers with a higher interruption capability.

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“…Series puffers can provide a maximum rating of 245 kV-40 kA-60 Hz/50 kA-50/60 Hz [1][2][3]. In circuit breakers of this class, short line fault (SLF) interruption (L90) is one of the most demanding duties.…”

Section: Introductionmentioning

confidence: 99%

Improvement of thermal interruption capability in self‐blast interrupting chamber for new 245‐kV 50‐kA GCB

Shinkai

Koshiduka

Mori

et al. 2009

Electrical Engineering Japan

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Keywords: self-blast, series puffer (double volume), short line fault interruption, thermal interruption, optimized procedure Current zero measurements are performed for 245 kV-50 kA-60 Hz short line fault (L90) interruption tests with a self-blast interrupting chamber (double volume system; see Fig. 1) which has the interrupting capability up to 245 kV-50 kA-50 Hz L90. Lower L90 interruption capability is observed for longer arcing time although very high pressure rise is obtained. It may be caused by higher blowing temperature and lower blowing density for longer arcing time. New interruption criteria and a optimization method of the chamber design are necessary for the self-blast interrupting chamber to improve L90 interruption capability with it. Blowing pressure is obviously important for L90 interruption capability. In addtion, lower blowing gas density and higher temperature around the current zero may be critical for the self-blast chamber than conventional puffer type chamber. In this paper, average gas density and temperature are optimized in thermal volume to improve L90 capability as a primary stage although direct criterion for L90 should be arc conductance around current zero in the post-arc region. The optimization process for the interrupting chamber is performed with the computing cord which includes one-dimensional fluid dyanamics, arc modeling and kinematic equations. The new chambers are designed at 245 kV-50 kA-60 Hz to improve pressure rise and average gas density in thermal volume for long arcing time. After that, the chamber geometry is modified through two-dimensional fluid dynamics simulation because all parameters of the chambers are not able to decided through only the one-dimensional optimization. 245 kV-50 kA-60 Hz L90 interruptions are performed with the new chamber (model 60). Improvement of L90 interruption capability for model 60 is obviously observed comparing with model50 in Fig. 2. Arc conductace at 200 ns before current zero is distributed Fig. 1. Self-blast chamber configuration (double volume system) from 0.8 upto 1.1 mS in successful cases with model 60 in Fig. 2(a). The suggested optimization method is an efficient tool for the self-blast interrupting chamber design. The criteria for 60 Hz L90 are the pressure rise of 1.81 PU (1.0 PU for 50 Hz L90) and the average temperature of 1100 K in the thermal volume around current zero. Arc conductane around current zero should be the criteion for L90 interruption essentially. However, very sophsticated computing method is neccesary to calculate of it because temperature gradient and time variation in the post arc region around current zero are very steep and electric conductivity is very sensitive to temperature in the post arc. The study of computing methods is required to calculate arc conductance around current zero as a direct criterion for L90 interruption capability with higher accuracy. (a) Arc conductance at 200 ns before current zero (b) Pressure rise in thermal room at current zero Fig. 2. Experimental results for curr...

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Optimization of high-voltage self-blast interrupters by gas flow and electric field computations

Cited by 34 publications

References 7 publications

DC Circuit Breaker Using Superconductor for Current Limiting

DC Circuit Breaker Using Superconductor for Current Limiting

Analysis of SLF Interruption Performance of Self-Blast Circuit Breaker by Means of CFD Calculation

Improvement of thermal interruption capability in self‐blast interrupting chamber for new 245‐kV 50‐kA GCB

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