Grid-Connected Photovoltaic System for Active and Reactive Power Management

TL;DR

This paper investigates a grid-connected photovoltaic system with MPPT and a voltage source inverter that supplies active power and compensates reactive power, ensuring continuous operation during sunlight and non-sunlight conditions.

Contribution

It introduces a control strategy for PV systems to manage active and reactive power simultaneously using a voltage mode control approach.

Findings

System effectively supplies active power during sunlight.

System compensates reactive power during no sunlight.

Simulation results validate the control strategy.

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.