Fuzzy Logic Decoupling Control of Real and Reactive Power in Grid-Connected Photovoltaic Power System based a Seven Levels Inverter Linked to a Three-Stage Boost Circuit

ABSTRACT

The paper presents a detailed modelling, simulation, and control of the real and reactive power flows in the Grid-Connected Photovoltaic Power system (GCPV) based on seven-phase voltage source inverter linked to a three-stage boost circuit interfacing a photovoltaic (PV) generation system to the power grid. Synchronisation of the inverter and grid AC waveforms is achieved using a phase-locked-loop (PLL) circuit. An effective decoupling strategy based on fuzzy logic controllers (DFLC) is designed to eliminate the interaction between the two current components. The DC-link voltage is controlled using a closed loop scheme based on a clamping bridge and an adaptive fuzzy logic PI controller (AFLC-PI). The overall model is implemented in Matlab and Simulink/SimPowerSystems toolboxes. Simulations results with the PV system operating with real irradiance data are presented to demonstrate the performance of the proposed decoupling and control strategies under different conditions of the power grid.

KEYWORDS:

• PV system
• fuzzy logic decoupling control
• adaptive fuzzy logic
• MPPT
• sliding mode
• seven levels inverter
• three-stage boost

Acknowledgments

The authors would like to acknowledge the financial support of the Algeria’s Ministry of Higher Education and Scientific Research. This work was supported by SCAMRE laboratory at Polytechnic national school (Oran, Algeria) in collaboration with L2GEGI laboratory at the University Ibn-Khaldun (Tiaret, Algeria).

Disclosure statement

No potential conflict of interest was reported by the author(s).

Authors

Just before REFERENCES we insert section Authors. It contains the data necessary for correspondence, e.g. name with title, address. The electronic mail address of all Authors is obligatory. Please do not use only initials for name – we need full name and surname of the authors

Authors: prof. dr hab. inż. Stanisław Malinowski, Politechnika Poznańska, Instytut Elektroenergetyki, ul. Piotrowo 3a, 60-965 Poznań, E-mail: [email protected]; dr inż. Jan Cichocki, Instytut Elektrotechniki, Zakład maszyn Elektrycznych, ul. Pożaryskiego 28, 04-703 Warszawa, E-mail: [email protected].

References

References are cited in the text by square brackets [1]. Two or more references at the time may be put in one set of the brackets [2, 3]. The references are numbered in the order in which they are cited. The style of the references is as follows: