Modeling and Simulation of Grid Synchronized DC Microgrid with Wind and Solar Resources

Abstract

The increased usage of fossil fuels has caused a concern for the depletion of such fuels, and has a detrimental impact on the environment by producing greenhouse gases. These major concerns has turned worldwide focus towards performing innovative research in renewable energy resources so that these could readily replace the depleting fossil fuels. Recently, the research and the resulting developments in the field of power electronics has allowed the use of integrating multiple renewable resources, such as wind and solar, for efficient distributed generation. Commercially sold systems have separate inverters for each renewable resource, thus increasing the system complexity, cost and power losses. Replacing these separate inverters with one inverter will reduce the system complexity, cost and power losses. Therefore, this paper studies the modeling and simulation of grid connected DC microgrid with wind and solar resources. The study analyses the modeling of each module: permanent magnet synchronous generator (PMSG) wind energy systems with diode rectifier; PV panels; DC-DC boost converters; voltage source inverter (VSI). The entire system is simulated with Powersys library of Simulink-MATLAB.