Hybrid Wind-Solar Power System with a Battery-Assisted Quasi-Z-Source Inverter: Optimal Power Generation by Deploying Minimum Sensors

This paper presents a hybrid renewable energy system (RES) including wind and photovoltaic (PV) power sources. The subsystem (WES) consists of squirrel-cage induction generator (SCIG) driven by variable-speed turbine (WT) corresponding electronic converter, means which speed-sensorless indirect-rotor-field-oriented control the SCIG is implemented. outputs both WES PV source rated 1.5 kW 3.5 kW, respectively, are connected to DC bus, with quasi-Z-source inverter (qZSI) acting as an interlinking converter between bus AC grid/load. An advanced pulse-width-modulation scheme applied reduce qZSI switching losses. considered RES can operate in grid-tie island operation, whereas battery storage system—integrated within impedance network—enables more efficient management. proposed includes successively executed algorithms for optimization under varying atmospheric conditions. A perturb-and-observe algorithm first due significantly faster dynamics higher-rated compared WES. two distinct fuzzy logic optimizations: one extraction maximum other minimization To number required sensors, all three MPPT utilize same input variable—the qZSI’s power—thus increasing system’s reliability reducing cost implementation. performance was experimentally evaluated over wide ranges simulated conditions operation.