Electromagnetic transient discretization modeling method and device and related equipment

The invention discloses an electromagnetic transient discretization modeling method and device and related equipment, and the method comprises the steps: obtaining a target transfer function of an electric power system element in a Laplacian transform domain, and the target transfer function is obtained through the preprocessing of an original transfer function of the electric power system element in the Laplacian transform domain; a discretization demand is obtained, a target discretization method is determined based on the discretization demand, and the discretization demand is used for describing simulation precision, calculation complexity and a simulation time scale; applying the target discretization method to the target transfer function to obtain parameters of a Z transform domain; and constructing a difference equation by using each parameter of the Z transform domain to obtain an electromagnetic transient model of the power system element in the Z transform domain. According to the method, discretiz