Simulation of a Grid Integration With Hybrid (Solar + Wind) Energy Systems by Using SPWM Inverter

Abstract

A hybrid PV system is a system that uses at least one additional source other than PV to provide the power needs of the loads. The other sources that are commonly used in conjunction with the PV source are diesel generators, wind generators, microturbines, fuel cells, etc. Such hybrid systems are more relevant for standalone, island, or microgrid operations. The change in wind speed leads to significant changes in the generator's output power and frequency in the case of the PV-wind hybrid system. Therefore, it is desirable to convert the AC output to DC and also convert it back to AC through the inverter as revealed in the block diagram below. This arrangement represents one of the alternative ways of generating clean and forward-thinking electricity for the future generation. The 2 sources employed to generate electricity are wind and solar. The PV module's DC output and the WECS rectified DC output are fed into the boost converter, which operates in Closed Loop control to keep constant power O/P under all environmental conditions. It comprises wind turbines connected to PMSG (Permanent Magnet Synchronous Generators). A three-phase SPWM inverter uses its DC input to create a 3-phase AC output, while the O/P of the other boost converter is fed into the common link of DC, which is linked to it. The three-phase AC output is connected to the grid-tied load. The entire hybrid energy system simulation is served in MATLAB/SIMULINK.