In order to improve the measurement accuracy of induction voltage divider on the basis of the existing two-stage structure

this paper proposes the principle of multistage excitation and develops a multistage excitation induction voltage divider（IVD）. Firstly

a closed shielded core structure and the 10 wire parallel winding of the proportional winding with coaxial cable are designed. Then

based on the finite element method

a three-dimensional induction voltage divider model in which the nonlinear magnetization of the core is taken into account is established to calculate the internal magnetic field distribution. Finally

the lock in amplifier SR850 is used to calibrate the error of voltage divider based on the reference potential method. The results show that the effect of capacitive leakage can be reduced and the outer equipotential shielding can be realized with 1

0 wire parallel winding. The shielding core structure can reduce the leakage flux by 29.6%. The 10-segment error of the 1 kV multistage excitation induction voltage divider is superior to 1×10

-7

. This research can provide support for improving the accuracy level of voltage ratio standards device of power frequency.