Source Side Control Analysis of An AC Microgrid Fed with Hybrid Renewable Distributed Energy Sources

In the proposed work, a grid connected AC microgrid fed by hybrid renewable distributed energy sources comprising of a solar photovoltaic energy system and a wind energy conversion system (WECS) is modeled. The Solar Photovoltaic energy system is modeled with Perturb and observe (P&O) based MPPT algorithm. A three-phase grid interfaced voltage source inverter is designed with an advanced bus clamping pulse width modulation technique called the 30 degree split clamp pulse width modulation for the source side analysis of the AC microgrid. This technique is compared against the space vector pulse width modulation (SVPWM) scheme. The former is a derivative version of the latter in a manner that the phases of its modulating signals are clamped for thirty degree for every quarter of a cycle. It is found that the source side current harmonics of the grid connected AC microgrid is appreciably reduced for the former technique as compared to the latter against the penetration of the hybrid renewable energy sources into the AC microgrid structure. This eases the process of synchronization and filter design to deal with switching losses. The proposed system is simulated in the MATLAB-SIMULINK platform.