Environment-Friendly and Efficient Gaseous Insulator as a Potential Alternative to SF6

Processes

HafizShafqat Kharal¹  MuhammadJunaid Alvi¹  Muhammad Kamran¹  MuhammadZaheer Saleem²  Rahmat Ullah² 

[1] Department of Electrical Engineering, University of Engineering and Technology, Lahore 54890, Pakistan;Faculty of Electrical Engineering, GIK Institute of Engineering Sciences and Technology, Topi 23640, Pakistan;

关键词: r152a/co₂;    global warming potential;    breakdown characteristics;    environment-friendly;    insulating material;    power frequency;   

DOI  :  10.3390/pr7100740

来源: DOAJ

【 摘 要 】

Sulfur hexafluoride (SF₆) is commonly used in electrical insulation networks due to its superior dielectric properties. However, it possesses a high Global Warming Potential (GWP) of 22,800 times compared to CO₂ (at equal mass over a time span of 100 years) and a high atmospheric lifetime. This alarming metric prompted investigation for substitute gases with minor environmental influences. The overall objective of this research is to evaluate refrigerant R152a as a potential alternative for SF₆ in electrical insulation systems. R152a gas has a significantly reduced value of GWP (140) and is a cheap insulation medium as compared to SF₆. In this paper, dielectric breakdown testing of R152a and a mixture of CO₂ with different concentrations have been tested. The dielectric strength of R152a/CO₂ gas shows a saturated growth trend with increasing the gap difference, gas pressure and mixing ratio of R152a. Based on our experimental conditions, R152a/CO₂ gas reveals good dielectric properties, and insulation performance can reach up to 96% of SF₆. Finally, this work will bring a cost-effective and environment-friendly gaseous insulator for utility companies and power equipment manufacturers.

【 授权许可】

Unknown