On May 15, the "Special Tools for Cleaning Ceramic Insulators of UHV Transmission Lines" invented by the State Grid Shanxi Maintenance Company through the group project was successfully accepted by the expert group. The use of this tool can shorten the cleaning time of single-string porcelain insulators by 70 %, Annual economic benefit 1580000 yuan. Since the world's first UHV transmission line was put into operation on January 6, 2009, it has played an important role in alleviating the contradiction between power supply in central and northern China. Therefore, it is extremely important for the safe and stable operation of UHV AC transmission lines. As the Shanxi section of 1000 kV Chang Nan I line belongs to Class â…¡, â…¢ and â…£ pollution area, the porcelain insulator is seriously polluted and the insulator cleaning work must be carried out during the power outage over the years. How to accomplish the task of insulator cleaning with quality and quantity within the existing power cut-off time has become a problem in front of maintenance personnel. The "special high-voltage line porcelain insulator cleaning tools" is the maintenance branch of the Transportation Inspection Center Group Innovative project in 2012 invented a small tool specifically for porcelain insulator cleaning difficult problem developed, the tool structure is simple, the operation Convenient, easy to promote, can greatly improve the operating efficiency of maintenance personnel, shorten the maintenance of the line power outage.