On August 15, the reporter learned from Haisfu, a leading fluorine new materials company in Mingxi County, Fujian Province that the world's first 550 kV perfluoroisobutyronitrile (C4F7N, referred to as C4) environmentally friendly gas-insulated metal-enclosed transmission pipeline (GIL) independently developed by Pinggao Electric in conjunction with China Electric Power and State Grid Anhui Electric Power was recently successfully put into operation in Anqing, Anhui Province. The project's transmission pipeline uses perfluoroisobutyronitrile and carbon dioxide mixed gas as the transmission insulation medium. Haisford provides the core medium, perfluoroisobutyronitrile environmentally friendly gas, to help my country achieve another landmark breakthrough in the field of environmental protection power equipment.
The world's first 550 kV C4 environmentally friendly GIL was successfully put into live operation at Anqing's 500 kV Rongsheng Substation. Xu Xiaoxiaophotographed
"The conventional insulating medium in the field of power transmission and transformation uses sulfur hexafluoride. Sulfur hexafluoride has long been used in the industry because of its excellent insulation and arc extinguishing properties, but its global warming potential (GWP) is as high as 24300 times that of carbon dioxide. In recent years, policies have been introduced around the world to control and replace it."
Wu Chengying, chief engineer of Sanming Haisford Company, introduced.
At present, perfluoroisobutyronitrile has become the mainstream alternative gas for sulfur hexafluoride promoted in the power industry at home and abroad. It has excellent characteristics such as low global warming potential (GWP) and high insulation strength. After adopting the new mixed gas, the greenhouse effect will be reduced by more than 97%, effectively responding to the country's call for the application of environmentally friendly and low-carbon materials and the industry's general trend and environment.
New fluorine-containing materials are key materials for the development of emerging industries and belong to the high-tech field. In the past, the industrialization of perfluoroisobutyronitrile faced many difficulties such as low reaction yields, poor catalyst matching, and reactor selection, which seriously restricted the localization of perfluoroisobutyronitrile. Through the independent innovation of Haisford R & D personnel, the company continues to break through industrialization technical problems one after another. In August 2023, Haisford Company built the world's first thousand-ton production line, becoming one of the few domestic enterprises with large-scale production capabilities; in November 2024, it obtained the regular registration certificate of perfluoroisobutyronitrile approved by the Ministry of Ecology and Environment of the People's Republic of China. At present, the company's perfluoroisobutyronitrile has been supplied in batches to mainstream power equipment companies at home and abroad.
According to reports, the commissioning of the 550-kilovolt C4 environmentally friendly gas GIL is another landmark application of perfluoroisobutyronitrile in ultra-high voltage levels. It lays the foundation for subsequent wider promotion and will effectively promote the environmental protection of my country's power grid power transmission and transformation equipment. Upgrading to a higher level.
