Islanded Mode Microgrid using Stirling based Biogas Generator and Solar PV systems

In this paper, islanded mode microgrid system using biogas and solar PV is discussed for small power applications (upto 250 W) in remote locations. Biogas generation is done using stirling engine coupled with DC generator which directly converts biogas to electrical power. Solar PV system with double sliding integral control based MPPT tracking is connected in parallel with the biogas system. These two sources are connected in parallel to a flyback converter for stepping up the voltage. This is fed to a single phase inverter which is controlled to give constant 220 V, 50 Hz AC to form a hybrid microgrid. The proposed system and the control scheme is modeled in MATLAB/Simulink and tested at different conditions of solar and biogas availability and the results are presented. The proposed system could produce 220 V supply with ≈ 1.5% THD.