Open AccessComparative Evaluation of PI and Fuzzy Logic Controller for PV Grid-Tie Quasi Z-Source Multilevel Inverter
Author(s) -
Devaraj Umarani,
Seyezhai Ramalingam,
S. Dhivya
Publication year - 2021
Publication title -
mehran university research journal of engineering and technology
Language(s) - English
Resource type - Journals
eISSN - 2413-7219
pISSN - 0254-7821
DOI - 10.22581/muet1982.2103.01
Subject(s) - control theory (sociology) , maximum power point tracking , photovoltaic system , inverter , controller (irrigation) , matlab , computer science , pid controller , fuzzy logic , z source inverter , grid , voltage , topology (electrical circuits) , engineering , control engineering , mathematics , control (management) , electrical engineering , temperature control , agronomy , artificial intelligence , biology , operating system , geometry
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.