Lu Tiebing

A novel simulation method for positive corona current pulses

A novel two-dimensional (2D) simulation method of positive corona current pulses is proposed. A control-volume-based finite element method (CV-FEM) is used to solve continuity equations, and the Galerkin finite element method (FEM) is used to solve Poissons equation. In the proposed method, photoionization is considered by adopting an exact Helmholtz photoionization model. Furthermore, fully implicit discretization and variable time step are used to ensure the time-efficiency of the present method. Finally, the method is applied to a positive rod-plane corona problem. The numerical results are in agreement with the experimental results, and the validity of the proposed method is verified.

Application of multi-conductor transmission lines on the transient analysis in power substation

Some structures in a power system can be modeled as multi-conductor transmission lines or transmission line in order to analyze the transient process when the switches are operated or electromagnetic pulse is imposed. In this paper the modeling of a transmission line and its finite difference time domain (FDTD) method are researched, and then extended to the transmission line network and nonuniform line. After the method is tested, some examples are finally analyzed in order to predict the transient voltage in power substations.