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

Kim, Hong-Kyu; Chong, Jin-Kyo; Lee, Se-Hee

doi:10.5370/jeet.2014.9.1.254

Abstract ▼ AI-Helper

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 ...

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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문제 정의

Considering these points, this paper proposed the SLF interruption performance index using the pressure in the HC and the density above the arc zone, and compared it with the measured interruption characteristics (G index). The index derived in this paper is a useful objective function in designing and optimizing the interrupters with a higher interruption capability. Future research will examine the optimal coefficient γ of various GCB models, as well as the different rating voltages and interruption currents.

제안 방법

Successful interruption requires high density gas flow from the upstream chamber to the arc zone. Considering these points, this paper proposed the SLF interruption performance index using the pressure in the HC and the density above the arc zone, and compared it with the measured interruption characteristics (G index). The index derived in this paper is a useful objective function in designing and optimizing the interrupters with a higher interruption capability.

이론/모형

. In this study, the two zone arc model [1] was used to calculate the arc voltage, arc temperature, arc radius, and the ablation rate of nozzle material. The arc voltage was obtained after calculating the arc temperature and arc radius.
The ablated nozzle material by (1) was treated as a mass source term in the mass conservation equation. The arc was treated as an energy source term and the flow equations were solved by the Finite Volume Fluid in Cell method as a computational fluid dynamics (CFD) scheme [2].

성능/효과

The performance index was compared with the interruption test results, and the feasibility of it was demonstrated. The results showed that the defined index function represents the measured arc conductance characteristics well according to successful or failed interruption tests.

후속연구

Future research will examine the optimal coefficient γ of various GCB models, as well as the different rating voltages and interruption currents.

참고문헌 (7)

M. Claessens, et al., "A computational fluid dynamics simulation of high and low current arcs in self-blast circuit breakers," J. Phys. D: Appl. Phys., Vol. 30, pp. 1899-1907, 1977.
H.K. Kim, et al., "Analysis of Dielectric Breakdown of Hot $SF_6$ Gas in a Gas Circuit Breaker," Journal of Electrical Engineering & Technology, Vol. 5, No. 2, pp. 264-269, 2010.

원문보기 상세보기
J. Sedlacek, et al., "Optimization of High-Voltage Self-Blast Interrupters by Gas Flow and Electric Field Computations," IEEE Trans. on Power Delivery, Vol. 18, No. 4, pp. 1228-1235, 2003.

상세보기
T. Shinkai, et al., "Improvement of Thermal Interruption Capability in Self-Blast Interruption Chamber for New 245kV 50kA GCB," Electrical Engineering in Japan, Vol. 167, No. 1, pp. 9-17, 2009.
R.P.P. Smeets, et al., "A new arc parameter database for characterisation of short-line fault interruption capability of high-voltage circuit breakers," Cigre General Session 2006, Paper No. A3-110, 2006.
J. K. Chong, et al., "A study on arc conductance of puffer type $SF_6$ GCB at current zero period," Trans. KIEE. Vol. 59, No. 2, pp. 328-332, 2010.
Yong-Sung Cho, et al., "Investigation of SLF Interruption Capability of Gas Circuit Breaker with CFD and a Mathematical Arc Model," Journal of Electrical Engineering & Technology, Vol. 8, No. 2, pp. 354-358, 2013.

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