Evaluation of HVDC Based on Voltage Source Converter Connecting Two Networks

Abstract

The recent developments in semiconductors and control equipment have made the voltage source converter based on high voltage direct current (VSC- HVDC) feasible. Due to the use of VSC technology and pulse width modulation (PWM) the VSC-HVDC has a number of potential advantages as compared with classic HVDC, such as short circuit current reduction, rapid and independent control of active and reactive power, etc. With those advantages VSC-HVDC will likely be widely used in future transmission and distribution systems. In this thesis, the scenario of VSC-HVDC focus on the performances evaluation of the complete VSC-HVDC transmission system accommodates power between two active networks. The performance assessment include the robust of converter control system during active power step change, system stability during three phase fault and system stability during dc link fault. The analysis of results have been done in the MATLAB program.