Effective Grid Connected Power Injection Scheme Using Multilevel Inverter Based Hybrid Wind Solar Energy Conversion System

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K. Gnana Deepika, K. E. Gayathri, B. Sowjanya, M. Sai Prathyusha, K. Mahalakshmi


An improved cascaded H-Bridge multilevel inverter (CHBMLI)-based, grid-connected hybrid wind-solar energy conversion system (HWSECS) with a focus on power quality is presented in this paper. Through their respective DC/DC converters-based maximum power point tracking (MPPT) systems, the wind energy conversion system (WECS) and solar energy conversion system (SECS) are connected separately to isolated dc-links of the CHBMLI. When used as a PWM rectifier, the CHB topology causes capacitor unbalancing issues between the dc-links that feed different dc loads. The same problem occurs when the rectifier is operated in regenerative mode, with different sources injecting different amounts of power into each cell. When two distinct sources—WECS and SECS—are added to isolated dc-links, the proposed HWSECS system experiences the same unbalance voltages. The author tried to take advantage of topology's advantages while also writing the solution to problems with system control and operation. In addition to providing additional benefits, the proposed system's features and control scheme maximize power injection into the grid from renewable energy sources (RES). MATLAB/Simulink was used to conduct the simulation studies, which were then validated experimentally on a prototype with the help of dSPACE-1104. Additionally, a mathematical model of the HWSECS based on CHB-MLI has been developed for analysis

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