At present

there are only 800 kV DC voltage ratio standards in China.If the original standards are applied directly on higher than 800 kV DC voltage transformers field calibration

the distribution of surrounding electric field is still uneven

which will lead to lower accuracy.Therefore

this paper studies these problems and designed a 1 100 kV DC resistance standard voltage divider.This paper builds a finite element model of 1 100 kV DC resistance standard voltage divider based on ANSYS simulation software

calculates and analyzes the electric field distribution around and along the voltage divider layer.The influence of the size and position of the grading ring on the maximum field strength around the voltage divider is obtained.By reasonably setting the distance from the center of the grading ring to the ground

the radius of the inner ring

and the distance from the center of the circle to the axis of symmetry

the maximum field strength around the voltage divider can be greatly improved.In this study

the maximum field strength is reduced from 6 869.37 V/mm to 1 566 V/mm

which increases the insulation level.It is necessary to apply a shielding resistance layer to reduce the electric field intensity along the measuring resistance layer to 142.17 V/mm

and the distribution is uniform

thereby improving the measurement accuracy.This design has a good reference for the design

manufacture and operation of the voltage divider.