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首页> 外文期刊>IEEE Transactions on Dielectrics and Electrical Insulation >The influence of Cu, Al and Fe free metal particles on the insulating performance of SF6 in C-GIS
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The influence of Cu, Al and Fe free metal particles on the insulating performance of SF6 in C-GIS

机译：Cu，Al和Fe游离金属颗粒对C-GIS中SF6绝缘性能的影响

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Studying the influence of free metal particles on breakdown voltage is important to investigate the insulation performance of SF6 in electric equipment. Under 0.1 MPa pressure and free metal particles defect, this study shows the influence of particle number, gap distance and particle variety on SF6 breakdown voltage on AC power. Experimental results indicate that the breakdown voltage of SF6 decreases as the number of particles increases and eventually stabilizes; A shorter gap distance means a greater effect of free metal particles on the SF6 insulation performance during breakdown; Under the same conditions with copper or aluminum particles, the breakdown voltage of SF6 is approximate and is simultaneously lower than that with iron particles. The electric field force of copper and aluminum particles are close, and larger than that of iron particles, leading to their take-off voltage close and below the iron particles. Metal particles can reduce the reaction barrier of SF6, copper and aluminum particles have similar effects on the reaction barrier of SF6, which are obviously larger than that with iron particles. This study compares the breakdown performance under different numbers of particles, gap distances and varieties of particles. Result shows that copper or aluminum particles in C-GIS affect the insulation performance of SF6 more obviously than that with iron particles.
机译：研究自由金属颗粒对击穿电压的影响对于研究SF6在电气设备中的绝缘性能非常重要。在0.1 MPa压力和自由金属颗粒缺陷的情况下，这项研究表明了颗粒数目，间隙距离和颗粒种类对SF6击穿电压对交流电源的影响。实验结果表明，SF6的击穿电压随着颗粒数量的增加而降低，并最终趋于稳定。较短的间隙距离意味着击穿过程中自由金属颗粒对SF6绝缘性能的影响更大；在铜或铝颗粒的相同条件下，SF6的击穿电压是近似值，同时低于铁颗粒。铜和铝颗粒的电场力是接近的，并且比铁颗粒的电场力大，从而导致它们的起飞电压接近并低于铁颗粒。金属颗粒可以降低SF6的反应势垒，铜和铝颗粒对SF6的反应势垒具有相似的作用，明显大于铁颗粒。这项研究比较了不同数量的颗粒，间隙距离和颗粒种类下的击穿性能。结果表明，C-GIS中的铜或铝颗粒对SF6绝缘性能的影响比铁颗粒更明显。

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