The existence of space particles affects the corona discharge current and the electric field on the ground under the high voltage transmission lines to some extent. By researching the motion characteristics of space particle

we can not only know more about its influence to the corona characteristics

but also offer important references to engineering problems. On the basis of the simulation model of transmission line electric field

we put forward a motion model of charged space particles under the transmission line

and simulate the model by MATLAB to get the motion characteristics of different space particles and the influence of line voltage

particle diameter

original position

and relative dielectric constant on the motion characteristics. The results show that particle diameter influences more to the motion characteristics than its relative dielectric constant. The motion track

motion time

and change of motion speed depend more on the particle diameter. Nanometer particles and hundred micron particles are harder to reach the surface of the transmission lines than micron particles. The research will offer references for the design and construction of direct current engineering in the future.