Grid-Connected Photovoltaic System for Active and Reactive Power Management

Abstract

In this paper, the behavior of a photovoltaic (PV) system, with maximum power point tracking (MPPT) connected to three-phased grid has been investigated. A voltage source inverter (VSI) has been used to connect the photovoltaic system to the grid. The control strategy applied to control inverter switches is based on voltage mode method. Strategy of this project is that during sunlight the system sends active power to the grid and at the same time compensates the reactive power of the load. In case there is no sunlight, the inverter only compensates the reactive of the load. So the photovoltaic system is operated the whole day. In this paper the behavior of the photovoltaic system to provide active power and compensate reactive power of the load is investigated. The time domain simulation is performed using PSCAD/EMTDC software.