Overhead Conductor Motion During Short Circuits

It is widely recognized that all conductors experience motion when subjected to the passage of high currents. This is due to the forces exerted by the magnetic fields produced by current flow in the conductor. This paper examines factors which affect the degree of conductor motion in overhead lines. Several cases are examined to illustrate potential systems design trends which may affect distribution system reliability when conductor motion parameters are ignored. A finite element model is used to estimate the amount of conductor motion under various conditions. It is demonstrated that conductor motion can have an adverse impact on system reliability and power quality.