High-voltage post insulators are widely used in power systems. The electrical and mechanical properties of post insulators are closely related to the operation stability of power systems. Based on the finite element method,the mechanical and electrical properties of the insulator are modeled and analyzed.The results show that the maximum electric field strength of the insulator is located on the surface of the pressure equalizing ring on the high voltage side,and the first principal stress maximum value of 150 MPa is mainly concentrated on the flange supporting sheet. The mechanical and electrical properties of the post insulators and the configuration of the post insulator-related voltage sharing ring and shielding ring are obtained,which can provide theoretical basis for the insulation structure design and fittings configuration of post insulators with UHV and below voltage levels.
