关于特高压交流GIL输电技术的研究

A Study on Extra-high Voltage AC GIL Transmission Technology

随着我国新能源汽车的发展、5G基站数量的持续发展及城市大型化的推进,用电需求量不断增加。在这种趋势下,特高压、超高压输电技术因其在远距离传输下的优势逐渐成为主流。而特高压交流GIL输电技术因其安全可靠、高效、智能等优势更能受到市场的青睐。特高压交流GIL输电技术一直采用的SF6(六氟化硫)绝缘气体相对于其他部分全氟碳类化合物全球变暖潜能值(GWP)更高,而这些全氟碳的介电强数都与SF6相当。对绝缘气体的选用和特高压交流GIL输电技术的关键技术进行了分析。

With the development of new energy vehicles,the continuous development of the number of 5G base stations and the promotion of urban massification in China,the demand for electricity is constantly increasing.Under this trend,extra-high voltage and ultra-high voltage transmission technologies are gradually becoming mainstream due to their advantages under long-distance transmission.The UHV AC GIL transmission technology is more favoured by the market because of its advantages of safety,reliability,efficiency and intelligence.The SF6(sulphur hexafluoride)insulating gas that has been used in EHV AC GIL transmission technology has a higher global warming potential(GWP)than some other perfluorocarbons,which are all comparable to SF6 in terms of dielectric strength.The selection of insulating gases and the key technologies of EHV AC GIL transmission technology are analysed.