Design of a 1 MW grid-tied photovoltaic system

The installation of large-scale grid-tied photovoltaic (PV) systems are rising fast around worldwide. This rise is because the system relies on a widely available green source (sun). Furthermore, many developments were carried out to increase the PV system efficiency and decrease its total cost, which encouraged electrical companies to install large-scale PV systems. Many components must be used to construct an efficient system, including a PV array, two power electronics converters, filter and transformer. Additionally, two controllers are usually in the design. One is in charge of maximising the power for the PV modules in the array, and the second one is used to ensure the voltage is constant. The paper introduces a PV system design that can reach 1 MW connected to the grid through different stages to match up with the required voltage and frequency of the grid as a requirement for the final year project in the Electronic and Electrical Engineering Department, the University of Sheffield. The whole grid-tied PV system was designed and simulated using MATLAB/SIMULINK.