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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 대한전기학회 Journal of Electrical Engineering & Technology Journal of Electrical Engineering & Technology Vol.13 No.4
- 발행연도
- 2018.7
- 수록면
- 1,663 - 1,672 (10page)
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초록· 키워드
오류제보하기
In recent times, gas insulated medium voltage (MV) circuit breakers (CB) form a vital component in power system network, considering its advantages such as reduced size and safety margins. Gas insulation characteristics of circuit breakers are generally measured by lightning impulse (LI) test according to IEC standard 60060-1 as a factory routine test. Considering the environmental issues of SF<SUB>6</SUB> gas, many research works are being carried out towards the mixture of SF<SUB>6</SUB> gases for high voltage insulation applications. However, few reports are only available regarding the LI withstand and streamer propagation characteristics (at both positive and negative polarity of waveform) of SF<SUB>6</SUB>/N₂ gas mixture insulated medium voltage circuit breakers. In this paper, positive and negative polarity LI tests are carried out on 22 kV medium voltage circuit breaker filled with SF<SUB>6</SUB>/N₂ gas mixture at different gas pressures (1-5 bar) and at different gas mixture ratios. Important LI parameters such as breakdown voltage, streamer velocity, time to breakdown and acceleration voltage are evaluated with IEC standard LI (1.2/50 μs) waveform. Weibull distribution analysis of LI breakdown voltage data is carried out and 50% probability breakdown voltage, scale parameter and shape parameter are evaluated. Results illustrate that the 25% SF<SUB>6</SUB>+75%N₂ gas filled insulation considerably enhances the LI withstand and breakdown strength of MV circuit breakers. LI breakdown voltage of circuit breaker under negative polarity shows higher value when compared with positive polarity. Results show that maintaining the gas pressure at 0.3 MPa (3 bar) with 10% SF₆ gas mixed with 90% N₂ will give optimum lighting impulse withstand performance of 22 kV MV circuit breaker.
목차
Abstract
1. Introduction
2. 22 kV Circuit Breaker Prototype Specimen
3. Lightning Impulse Experimental Works
4. Results and Discussion
5. Conclusion
References
참고문헌 (24)
참고문헌 신청
Sven D. Meier, Philip J. Moore, and Paul F. Coventry, “Radiometric Timing of High-Voltage Circuit- Breaker Opening Operations” IEEE Transactions on Power Delivery, vol. 26, no. 3 pp. 1411-1417, 2011.
M. T. C. Fang, and G. R. Jones, “Fundamental arc properties for the design of gas-blast circuit-breaker test heads” Electronics and Power, vol. 25, no.2 pp. 131-135, 1979.
Sumedh Pawar, Kishor Joshi, Lalichan Andrews, and Subodh Kale, “Application of Computational Fluid Dynamics to Reduce the New Product Development Cycle Time of the Gas Circuit Breaker,” IEEE Transactions on Power Delivery, vol. 27, no. 1 pp. 156-163,2012.
Hidemasa Takana, Toshiyuki Uchii, Hiromichi Kawano, and Hideya Nishiyama “Real-Time Numerical Analysis on Insulation Capability Improvement of Compact Gas Circuit Breaker” IEEE Transactions on Power Delivery,” vol. 22, no. 3 pp. 1541-1546,2007.
Hiroyuki Hama, and Shigemitsu Okabe, “Factors dominating dielectric performance of real-size gas insulated system and their measures by dielectric coatings in SF6 and potential gases,” IEEE Transactions on Dielectrics and Electrical Insulation vol. 20, no. 5 pp. 1737-1748, 2013.
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UCI(KEPA) : I410-ECN-0101-2018-560-002230757