Ground-Wall Insulation Structure Optimization Method Research Based on Composite Material for Stator Bars

A ground-wall insulation structure optimization method based on a composite material for a stator bar is proposed in this paper. The trend regularity of the nonuniform coefficient of the electric field for a composite dielectric fillet electrode structure is established with the finite element method, and a composite ground-wall insulation structure optimization model is established in combination with the Nelder-Mead optimization algorithm. A composite ground-wall insulation optimization structure is acquired based on this model and material parameter, reducing the maximum electric field inside the ground-wall insulation and increasing the overall electrical performance of the stator bars with composite ground-wall insulation. The measured results are consistent with the predicted trend, which verifies the validity of the proposed method.