Application and Recycling of SF6 gas Mixtures in Gas-insulated Circuit Breaker in Northern China

3rd International Conference on Advances in Energy, Environment and Chemical Engineering

能源学;生态环境科学;化学工业

Liu, Wei^1 ; Su, Zhenxi^1 ; Qi, Jiong^1 ; Zhu, Feng^1 ; Zhao, Yue^1 ; Ma, Fengxiang^1 ; Yuan, Xiaofang^1 ; Chen, Ying^1

Key Laboratory for Sulfur Hexafluoride Gas Analysis and Purification, State Grid Anhui Electric Power Research Institute, State Grid Corporation of China, Hefei

230022, China^1

关键词: Cold weather;    Gas ratio;    Mixed gas;    Northern China;    SF6 gas;    System voltage;    Very low temperatures;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/69/1/012002/pdf
DOI  :  10.1088/1755-1315/69/1/012002

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In northern China, very low temperatures stress a circuit breaker in a complex manner. In recent years, we develop mixed-gas circuit breakers utilizing SF6gas mixtures (SF6/CF4or SF6/N2) which offer excellent cold-weather performance at temperature as low as -45 °C. The performance of SF6gas mixtures is different upon the partner of SF6gas and the gas ratio of the mixtures. We utilized different SF6gas mixtures in circuit breakers at different system voltages in different areas. Unlike pure SF6gas, handling and recycling SF6gas mixtures is a complex job, and it is in urgent need of an outline of handling and recycling SF6gas mixtures since more and more SF6gas mixtures insulated equipment are in service. In this paper, we introduce the situation of mixed-gas circuit breakers at different system voltage, and present how to handle and recycle SF6gas mixtures while the mixed-gas circuit breakers are out of use.