c-C_4F_8/N_2混合气体稍不均匀电场下绝缘性能及放电分解产物的试验研究

SF6存在液化温度高和温室效应两大问题,电力行业发展急需新型环保气体。本文对cC_4F_8/N_2混合气体的绝缘性能进行了试验研究,测量了在稍不均匀电场中,不同气压强度以及混合比例条件下的工频交流击穿电压,结果表明,在实验条件范围内,击穿电压随着气压和c-C_4F_8占比的上升而上升;将实验结果与SF6比较发现c-C_4F_8/N_2混合气体具备和SF6相当的绝缘性能。此外,本文还对混合气体击穿后的气体进行了检测,发现了分解产物C_2F_4。本文为今后c-C_4F_8/N_2混合气体在电力行业中的实际应用提供了参考。

Experimental research on insulation characteristics and decomposition products of c-C4F8/N2 mixtures in slightly non-uniform electric field

High liquefaction temperature and greenhouse effect are two major problems of SF6.To find alternative gas of SF6 becomes an urgency in power industry.In this paper, the insulation characteristics of c-C4F8/N2 are studied.The AC breakdown voltage in slightly non-uniform electric field with different air pressure and mix ratio is measured.The results show that breakdown voltage increases with the increase of the pressure and the proportion of c-C4F8 within the range of experimental conditions and c-C4F8/N2 has considerable insulation properties as compared with SF6.In addition, the mixture gas after breakdown is detected.C2F4, a new decomposition product, is found.Results in this paper provide a reference for the practical application of c-C4F8/N2 mixtures in power industry.