Seven Level Parallel Inverter for Wind, PV, Battery based Hybrid Standalone System

Electric power generation through hybrid renewable energy sources is a best solution for solution of many problems. In order to achieve the best performance of the model, a multilevel inverter must be incorporated between dc-link and load bus. However, multilevel inverters are suffering with high number of switches. Hence, a closed loop control method of a seven level parallel multilevel inverter is implemented in this paper to improve the power quality. PMSG coupled wind power conversion system, PV and battery operated standalone system is considered in this paper. The proposed parallel multilevel topology required only half number of switches compared to existing basic topologies. A new SPWM method is implemented in this paper to generate the required pulses to the inverter. The hardware-in-loop (HIL) is implemented to analyze the response of the system under various operating conditions with the help of OPAL-RT devices.