Finite Element Analysis and Design on Calibrating Device of Rotary Electric Field Sensor

The accurate measured value of the electric field strength under the UHVDC (Ultra High Voltage Direct Current) transmission line is one of the important indexes for assessing whether the UHVDC is laid properly. The accurately calibrated electric field sensor is the premiss for correctly measuring electric filed strength. Based on the finite element method, this article presents the finite element analysis on the calibrating device of the electric field strength sensor. Based on the results of the finite element analysis, this article also presents the optimal design on the calibrating device.