January 4, 2018 Recently, the first mixed-gas pilot bus in Wuhu, Anhui Province, China, with 220 kV Puqing Substation and East China, was successfully monitored one week after it was put into operation. The SF6 content of the pilot project was reduced from 100% to 30%.
220 KV Puqing change is one of the 8 substations used by GIS of SFG / N2 mixed gas pilot project of State Grid Corporation of China and the only pilot unit in East China. Punch change SF6 / N2 gas mixture pilot project should be used in the station 110 kV GIS two mother bus. Combined with the power failure plan of No. 2 Main Transformer Extension in the station, it started on December 15 and was successfully completed before New Year's Day through gas recovery, bus replacement, vacuum gas injection, mixture ratio test and pressure test. The successful commissioning of the pilot bus indicates that the application technology of mixed gas GIS bus technology in our country has achieved a stage-by-step breakthrough and the products already have the conditions for on-site promotion and application.http://www.wxytgas.com/