BEIJING, May 20 (Xinhua) -- State Grid Henan Electric Power Supply Co. recently put into operation a 126kV outdoor electrical equipment without use of sulfur hexafluoride at its 110kV Luozhuang transformer substation in Luoyang, a city in central China’s Henan Province, in an effort to reduce greenhouse gas emission.
Electric utilities rely heavily on sulfur hexafluoride in electric power systems for voltage electrical insulation, current interruption, and arc quenching in the transmission and distribution of electricity, while sulfur hexafluoride is widely considered as one of the most potent greenhouse gases.
In order to reduce its impact over environment, the power grid company use clean air instead of sulfur hexafluoride as insulator in the outdoor electrical equipment which is composed of 126kV vacuum circuit breaker and current transformer. In addition, the use of clean air could also helps simplify the maintenance of the equipment.
Over the past years, State Grid Group is increasing its research in reducing greenhouse gas emissions of high-voltage power equipment and putting into operation a number of trials across the country, including the one that came on stream in Henan, with one of the targets to realize zero growth in total use of sulfur hexafluoride before 2028. (Edited by Liang Hengwei, lianghengwei@xinhua.org)
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