Backstepping Control for MPPT and UPF of a Three Phase Single Stage Grid Connected PV System

M. El malah, A. Ba-razzouk, M. Guisser, E. Abdelmounim, M. Madark

Abstract


This paper presents a new control methodology of a three phase grid connected photovoltaic system without using the intermediary DC/DC converter. Based on the synchronized nonlinear model of the whole photovoltaic system, two controllers have been proposed for the three-phase inverter in order to ensure the operation of the PV system at the maximum power point with unity power factor and minimum grid disturbance. Grid synchronization has been ensured by a three-phase 2nd order PLL (Phase-Locked Loop). The stability of each controller is demonstrated by means of Lyapunov analysis and evaluated under changing atmospheric conditions using the Matlab/Simulink environment, the simulation results clearly demonstrate the performance provided by each controller.

Keywords


Backstepping controller; Grid connection; Maximum power point tracking; PV systems; Unity power factor;

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DOI: http://doi.org/10.11591/ijra.v7i4.pp262-272
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This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.