By mining the global patent data of intelligent transmission operation and maintenance technology

this paper analyses the innovation and development of key technologies of global intelligent transmission operation and maintenance.Patent information analysis method and DDA patent analysis tool are used to analyze patent application situation

technology life cycle

technology distribution

dominant countries and institutions

and the latest development trend of technology based on patent data.This study draws the following conclusions:（1）Technological innovation in the field of intelligent transmission operation and maintenance is very active

and patent applications are increasing significantly

which is still in the stage of rapid development;（2）Patent technology mainly concentrates on the detection of faults in cables/transmission lines or power grids

circuit devices providing remote control of power grids

data processing systems or methods of power departments

methods or equipment for installing/maintaining/repairing or dismantling overhead lines or cables

deicing or snow removal devices from wires or cables

etc;（3）In recent years

technology fields such as manipulator

resource/workflow/personnel or project management

dielectric strength testing or breakdown voltage testing are the hotspots of technological innovation;（4）The number of patents in China is much larger than that in developed countries such as Japan

the United States

South Korea

Russia

and so on.The number of patents in China is large

covering a wide range of fields

and its competitive advantage is obvious;（5）More and more advanced technologies

such as information technology

communication technology

artificia intelligence

internet of things

will be used to improve the efficiency and effectiveness of operation and maintenance.