Large unmanned helicopter（UAV） patrol system has good application prospects in the field of operation detection and disaster emergency survey of power grid

however

there are some problems and limitations in the practicality of the existing inspection system. Therefore

we put forward the practical goals and strategies of the large UAV power patrol technology research

equipment development

and demonstration application

and practically studied the domestic Z-5 UAV flight platform

UAV TT&C communication system and UAV mission load system. Moreover

using satellite relay communication technology to solve long-distance patrol communication problem of UAV

we developed an integrated and fully automatic photoelectric pod for electric patrol inspection. The developed new generation UAV patrol system has been applied in coastal

mountainous

ice

plain

rain and fog

high altitude

even at night and other typical complex environments in southern China

in which 1 340 km of 110～500 kV lines have been inspected including more than 30 routes and 46 sorties

the length of single sortie patrol routes exceeds 60 km and the flying time reaches 3 h. The results show that the environmental adaptability

efficiency and reliability of patrol inspection system have been improved remarkably

and it has basically reached the level of practicality.