Simulation of Arc Rotation and Its Effects on Pressure of Expansion Volume in an Auto-Expansion SF<sub>6</sub> Circuit Breaker

ZHANG Junmin (张俊民 ); CHI Chengbin (迟程缤); GUAN Yonggang (关永刚); LIU Weidong (刘卫东); WU Junhui (吴军辉)

doi:10.1088/1009-0630/18/3/12

Plasma Science and Technology > 2016 > 18(3): 287-291. > DOI: 10.1088/1009-0630/18/3/12

ZHANG Junmin (张俊民 ), CHI Chengbin (迟程缤), GUAN Yonggang (关永刚), LIU Weidong (刘卫东), WU Junhui (吴军辉). Simulation of Arc Rotation and Its Effects on Pressure of Expansion Volume in an Auto-Expansion SF₆ Circuit Breaker[J]. Plasma Science and Technology, 2016, 18(3): 287-291. DOI: 10.1088/1009-0630/18/3/12

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Simulation of Arc Rotation and Its Effects on Pressure of Expansion Volume in an Auto-Expansion SF₆ Circuit Breaker

1School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191 China 2Department of Electrical Engineering, Tsinghua University, Beijing 100084, China 3Pinggao Group Co., Ltd., Pingdingshan 467001, China

Funds: supported by National Natural Science Foundation of China (Nos. 51177005 and 51477004)

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Received Date: September 07, 2015

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Abstract

Abstract

A 3D Magnetohydrodynamics (MHD) arc model in conjunction with an arc move¬ment model is applied to simulate the arc rotation as well as to solve its effect on the pressure in an auto-expansion circuit breaker. The rotation of the arc driven by an external electromagnetic force is simulated in the case with 200 kA of the short circuit current and 16 ms of arc duration. The arc rotating process and the speed of arc rotation have been obtained in the simulation. A comparison of the pressure in the expansion volume with and without an external magnetic field has been carried out based on the calculation results of two cases. The results of the simulation reveal that the arc rotation, which causes more energy exchange between the arc and its surrounding gas, can evidently bring about the pressurization in the expansion volume, which would contribute to more effective arc quenching at current zero and further reducing operation power.
- SF₆ circuit breaker,
- 3D arc model,
- external magnetic field,
- arc rotation

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References

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