Abstract
This paper portrays a comparative analysis report of Proportional-Integral (PI) and Fuzzy Logic Controller (FLC) for total Power control of Photovoltaic (PV) based grid-tie single-phase five- level Quasi Z-Source Inverter (qZSI). The adopted power control scheme allows for independent maximum power point tracking (MPPT) and independent control of DC link voltage in each H-bridge of the proposed inverter. This analysis is carried out to depict the differences in the performance of both the controllers. It also demonstrates thesuitability of the controllers for the proposed topology. The proposed inverter has the advantages of reductionin size of the impedance network, negligence of boost converter stage and boosting of voltage with the help of 9shoot through states. The power control scheme has been implemented with both PI controller and FLC. Simulation has been carried out using MATLAB software and the results are presented.
Highlights
Grid-Connected PV systems turned out to be the promising renewable energy generation system in recent days due to their effective utilization of solar energy and clean power production
Among various topologies that are available for DC-AC power conversion, the candidate Quasi Z-Source Inverter stays aloof because of its various advantages
By cascading the H-bridges, the Quasi Z-Source Inverter (qZSI) procures the advantages of cascaded Multilevel Inverter (MLI) such as modularity, suitability to PV/Fuel Cell and improved power quality [1,2]
Summary
Grid-Connected PV systems turned out to be the promising renewable energy generation system in recent days due to their effective utilization of solar energy and clean power production. Among various topologies that are available for DC-AC power conversion, the candidate Quasi Z-Source Inverter stays aloof because of its various advantages. This voltage fed inverter does not require a DC-DC boost converter stage. The control strategy involves separate MPPT for each solar array, DC link voltage control for each of the H-bridge and total grid power control. Fuzzy logic controller has been implemented for qZSI and compared with the results achieved by PI controller.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Mehran University Research Journal of Engineering and Technology
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
