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http://dx.doi.org/10.4313/TEEM.2014.15.6.297

Linearizing and Control of a Three-phase Photovoltaic System with Feedback Method and Intelligent Control in State-Space  

Louzazni, Mohamed (Team Modeling and Simulation of Mechanical System, Faculty of Sciences, Abdelmalek Essaadi University)
Aroudam, Elhassan (Team Modeling and Simulation of Mechanical System, Faculty of Sciences, Abdelmalek Essaadi University)
Publication Information
Transactions on Electrical and Electronic Materials / v.15, no.6, 2014 , pp. 297-304 More about this Journal
Abstract
Due to the nonlinearity and complexity of the three-phase photovoltaic inverter, we propose an intelligent control based on fuzzy logic and the classical proportional-integral-derivative. The feedback linearization method is applied to cancel the nonlinearities, and transform the dynamic system into a simple and linear subsystem. The system is transformed from abc frame to dq0 synchronous frame, to simplify the state feedback linearization law, and make the close-loop dynamics in the equivalent linear model. The controls improve the dynamic response, efficiency and stability of the three-phase photovoltaic grid system, under variable temperature, solar intensity, and load. The intelligent control of the nonlinear characteristic of the photovoltaic automatically varies the coefficients $K_p$, $K_i$, and $K_d$ under variable temperature and irradiation, and eliminates the oscillation. The simulation results show the advantages of the proposed intelligent control in terms of the correctness, stability, and maintenance of its response, which from many aspects is better than that of the PID controller.
Keywords
Three-phase photovoltaic; Intelligent control; Fuzzy logic; Classical proportional-integrator-derivate; Feedback linearization;
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