A comparative study of SPWM and SVPWM controlled HVDC Light systems

Abstract

Recent upgrades in power electronics technology have lead to the improvements of insulated gate bipolar transistor (IGBT) based Voltage source converter High voltage direct current (VSC HVDC) transmission systems. These are also commercially known as HVDC Light systems, which are popular in renewable, micro grid, and electric power systems. Out of different pulse width modulation (PWM) schemes, Space vector PWM (SVPWM) control scheme finds growing importance in power system applications because of its better dc bus utilization. In this paper, SVPWM scheme is utilized to control the HVDC Light system in order to achieve better DC bus utilization, harmonic reduction, and for reduced power fluctuations. The simulations are carried out in the MATLAB/ SIMULINK environment and the results are provided for steady state and dynamic conditions in comparison with the existing sinusoidal PWM (SPWM) controlled HVDC light system. Finally, it is shown that SVPWM control enables the output voltage by nearly 15% and low Total harmonic distortion (THD) as compared to SPWM control.