Surface Electric Field Analysis of Drones Assisting Live Working in 220 kV Double-circuit Lines
Drone-assisted live working,owing to its features of digitization and intellectualization,facilitates improved work efficiency and power supply reliability,has displayed a promising development potential.The surface electric field distribution characteristics of drones approaching electric lines are nevertheless rarely studied,resulting in unguaranteed safety of operation near high-voltage transmission lines.This work thereby made preliminary attempts at the three-dimen-sional modeling of 220 kV steel-tube tower double-circuit lines and DJI drone,and the simulative calculation of near-line drone's surface electric field strength and distribution,via the COMSOL Multiphysics finite element software.According to the simulation,the maximum field strength located at the rotor tip of drone's near-line-side.Field strengths at the far-line-side rotor tip,at the lower bracket,and at the protruding part of fuselage were also higher than the rest parts of the drone.The increase of drone-line horizontal distance would lead to a gradually decaying reduction in electric field strength.The field strengths of the individual phases could be high-to-low sequenced as B,C,A with larger phase-to-phase differ-ences,and as A,C,B with smaller phase-to-phase differences,respectively,when the drone-line horizontal distance was>1.5 m and<1.5 m.The conclusions of this study may contain useful information for future practices of drone-assis-ted live working in high-voltage lines.
transmission lineslive workingdroneelectric field strength
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