In  timedomain to solve transient response of uniform transmission line excited by Lumpedsource

GAO Fangping, YAO Yingying

(College of Electrical Engineering, Zhejiang University, Hangzhou  310027, China)

Abstract:  In order to solve the problems of transient response of uniform transmission line excited by Lumpedsource ,the model of transmission line and finitedifference timedomain （FDTD）was investigated After the analysis of circuit theory and computational mathematics and program design, a simple and quick and effective numerical solution in time domain was established The partial differential equation group dispersed with the theory of FDTD solution A method was presented to a brannew differential formation Furthermore boundary conditions were found to basis lumped equivalent circuit mode at boundary and constraints between voltage and current Computing and programming to transmission line transient with different conditions of boundary and two line coupling or even more complicated loading were carried out, simulation waveforms were gotten By comparing the waveforms with the simulated waveforms obtained through the EMTPATP simulation software, the all results were tested The results indicate that the analysis provides a simple and feasible method for solving the transient response of uniform transmission line

Key words: circuit theory ; transmissionline equations ;finite difference time domain(FDTD); transmission lines transient process; numerical solution