A Unique Control Strategy for Grid Interactive Voltage Source Converter in a Solar Photovoltaic System Using MPPT

This paper deals with the study of different type of MPPT (Maximum Power Point Tracking) algorithms in a solar photovoltaic system (SPV) in order to extract maximum power from the solar modules. Here the solar array is integrated with the grid to provide power, as the traditional sources of power generation is depleting at a faster rate and also to provide power during peak hours in urban areas as well as supply power in the remote areas where grid set up is not possible. The solar photovoltaic array integration with grid can be made through power electronics interfacing i.e. by using the voltage source converter (VSC) and dc-dc converter (Boost Converter). A unique control strategy for the voltage source converter is applied in this paper for Solar Photovoltaic based grid interactive VSC system. A low pass LCL filter has been incorporated prior to the connectivity with the utility grid that can be expressed as Real or Active power (P) and Reactive power (Q). The overall performance of the system has been studied, modeled and simulated in MATLAB environment. Keywords-solar photovoltaic (PV) system; MPPT; voltage source converter; LCL filter