Direct power control in grid-tied photovoltaic systems

Abstract

This paper presents an analysis about the use of the direct power control in grid-tied photovoltaic systems. This technique is used to directly regulate the injection of instantaneous active and reactive power to the three-phase distribution network, avoiding current control loops used by traditional control strategies. The direct power control performance in photovoltaic systems is evaluated by PSIM simulation, which shows its good operation for this kind of applications. Finally, a comparative analysis is made between this controller and a traditional technique used in photovoltaic systems called voltage oriented control.

Keywords

• grid-tied photovoltaic systems
• power inverters
• direct power control