Numerical Method For Telegraph Equation And Application In Fault Detection

In this paper,we do some work about the fault detection on long distance HVDC transmission lines by using the telegraph equation to model and analysis the signal transmission process,using the numerical menthod to solve the equation,and deduces numerical solution of the boundary conditions required.We both make similar research about singlet and triplet equation and analysis the feasibility for traveling wave fault detection method.The social development and human life can not be separated completely power system,the country has built many thousands of kilometers HVDC aorta,but now the fault detection technology probably can do about several kilometers up to several tens of kilometers,for long fault detection distance transmission lines are in demand.Current transfer process in the transmission line can be carried out by transmission line equation.The transmission line equation is difficult to obtain analytical solution,but numerical method is an economical and efficient method to obtain approximate solutions.In this issue,a different fault in the corresponding numerical solution of different boundary conditions,we use the mathematical derivation of the boundary conditions were clear of the provisions.Using traveling wave in the fault detection method was simulated to make a feasibility analysis.