High-voltage DC Transmission System Model Research Based on SIMULINK Software

In recent years China presents to send power from west to east, and positively develop ultra high voltage and DC transmissions. This paper introduces the DC modeling in highvoltage direct current transmission the general method; respectively analyzed the characteristics of three kinds of simulation model and scope of application. Deduce the mathematical model formula of the main part of DC system, describe the basic control principle. By SIMULINK software to use the detailed model of HVDC system simulation model is established. And in view of the common faults under transient conditions are simulated. Through the simulation results show that in the transient analysis to choose the model is suitable and reliable.