Analysis and comparaison of control on power converters in photovoltaic energy

Abstract

This work proposes an advanced control of power converters used in Photovoltaic solar energy. The Boost converter and NPC three levels inverter are usually associated with photovoltaic cells. A maximum power point tracking algorithm is adopted in this case to maximize the output power by using sliding mode control approach. For Three levels inverter, six-command strategy are applied in order to compare their performances: PDPWM (Phase Disposition PWM) PODPWM (Phase Opposition Disposition PWM), APODPWM (Alternative Phase Opposition Disposition PWM), COPWM (Carrier Overlapping PWM), PSPWM (Phase Shift PWM) and SVPWM (Space Vector PWM). The Total Harmonic Distortion (THD) is evaluated for various modulation index. Finally, validity and effectiveness are verified through a simulaltion in Matlab/simulink.