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논문 기본 정보

자료유형
학술저널
저자정보
Dong-Ming Liu (Yantai Electric Power Bureau) Fu-Sheng Guo (Yantai Electric Power Bureau) Wen-xia Sima (Chongqing University)
저널정보
대한전기학회 Journal of Electrical Engineering & Technology Journal of Electrical Engineering & Technology Vol.10 No.2
발행연도
2015.3
수록면
625 - 633 (9page)

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초록· 키워드

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The effect of altitude on thermal conduction, surface temperature, and thermal radiation of partial arc was investigated on the basis of molecular gas dynamics to facilitate a deep understanding of the pollution surface discharge mechanism. The DC flashover model was consequently modified at high altitude. The validity of the modified DC flashover model proposed in this paper was proven through a comparison with the results of high-altitude simulation experiments and earlier models. Moreover, the modified model was found to be better than the earlier modified models in terms of forecasting the flashover voltage. Findings indicated that both the thermal conduction coefficient and the surface thermodynamics temperature of partial arc had a linear decrease tendency with the altitude increasing from 0 m to 3000 m, both of which dropped by approximately 30% and 3.6%, respectively. Meanwhile, the heat conduction and the heat radiation of partial arc both had a similar linear decrease of approximately 15%. The maximum error of DC pollution flashover voltage between the calculation value according to the modified model and the experimental value was within 6.6%, and the pollution flashover voltage exhibited a parabola downtrend with increasing of pollution.

목차

Abstract
1. Introduction
2. Arc Energy Balance Model Considering Radiation
3. Effect of Altitude on the Heat Exchange of Partial Arc
4. Modification of DC Flashover Voltage at High Altitude and Models Comparison
5. High Altitude Simulation Experiment
6. Conclusion
References

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