The Solution of Transient Response for Complex Transmission Line Network by Hybrid Higher Order Finite Difference Time

A novel hybrid higher order Finite Difference Time Domain (FDTD) (2,4) and Modified Nodal Analysis (MNA) method for transient response of transmission line network is proposed. By constructing a hybrid single-port network model, the distributed parameter systems are separated from lumped circuits, so the higher-order FDTD (2,4) and MNA can be used to analysis of transmission line and port circuit transient response respectively. Different from former methods, the higher-order FDTD (2,4) can utilize coarser cell sizes for calculation of electrically long transmission lines because of the lower numerical dispersion errors. At the same time, direct using of circuit analysis method to solve the port circuits, the voltage and current wave processes of each node in the circuit can be obtained. Several sets of numerical examples validate the proposed method has higher accuracy and efficiency.