Browsing by Author "Hamoudi, Farid"

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Design and implementation of three-level T-type inverter based on simplified SVPWM using cost-effective STM32F4 board
(Inderscience Online Journals, 2021) Amor, Yacine Ayachi; Kheldoun, Aissa; Metidji, Brahim; Hamoudi, Farid; Merazka, Abdeslam; Lazoueche, Youssouf
This paper investigates the design and validation of simplified space vector pulse width modulation (SVPWM) as a switching control for a three-phase three-level T-type inverter using STM32F4 board interfaced with MATLAB/Simulink environment. Usually, the SVPWM algorithm implemented using either DSP card or Dspace platform, which affects the cost of the system. On the contrary, the proposed algorithm offers a great reduction of computations compared with the conventional one, which grants an easy digital implementation. Thanks to the geometrical symmetry of six sectors, in which exists a close relationship between on-time calculations and on-time arrangement of the switching states. This can be exploited for the remaining sectors based on a single computation that relies on the first sector only. The proposed algorithm has been validated in both simulation and experimental tests. The results show the ability and the flexibility of using the STM32F4 board to drive a three-level T-type inverter
Fuzzy logic enhanced control for a single-stage grid-tied photovoltaic system with shunt active filtering capability
(Wiley, 2021) Ayachi Amor, Yacine; Hamoudi, Farid; Kheldoun, Aissa; Didier, Gaëtan; Rabiai, Zakaria
In this paper, a three-phase single-stage grid-connected photovoltaic (PV) system with active power filtering capability by means of a three-level T-type inverter is presented. The system is intended to fulfill many functions: harmonic mitigation, unity power factor operation, maximum power extraction from PV source, and so on. For the proposed system to achieve these tasks with a good dynamic performance, a new control strategy based on the fuzzy logic controller is developed. Fuzzy control has three main stages and each one requires many settings or selection of parameters. A new approach of setting the scaling factors which considerably affect the system's response is proposed. Furthermore, a methodology to properly set the fuzzy rules is suggested. The electrical power chain of the system comprises a farm of a PV source, three-level T-type inverter space vector pulse width modulation controlled, inductor filter, non-linear load, and the utility grid. To evaluate the performance of the proposed control, a processor-in-the-loop is performed as a hardware verification of the inverter control algorithm using a low-cost STM32F4 discovery board, while the power circuit plant is modeled in the host computer using Matlab/Simulink. The obtained results are very satisfactory and confirm the role of each component, especially in terms of maximum power tracking, power quality, unity power factor operation, and control robustness
Sliding mode control with fixed switching frequency for four-wire shunt active filter
(The Korean Institute of Electrical Engineers, 2011) Hamoudi, Farid; Chaghi, A. Aziz; Amimeur, Hocine; Merabet, El Kheir
The present paper proposes a sliding mode control with fixed switching frequency for three-phase three-leg voltage source inverter based four-wire shunt active power filter, to improve phase current waveform, neutral current mitigation and reactive power compensation in electric power distribution system. The performed sliding mode for active filter current control is formulated using elementary differential geometry, and the discrete control vector is deduced from the sliding surface accessibility using the Lyapunov stability. The problematic of the switching frequency has been treated considering hysteresis comparators for the switched signals generating. In this way, a variable hysteresis band has been established as a function of the sliding mode equivalent control and a predefined switching frequency in order to keep this one always constant. The proposed control has been verified with computer simulation which showed satisfactory results for the above objectives
Three-phase Three-level Inverter Grid-tied PV system with fuzzy logic control based MPPT
(2018) Ayachi Amor, Yacine; Hamoudi, Farid; Kheldoun, Aissa
This paper presents a three phase single stage grid connected photovoltaic PV system. Maximum power transfer from the solar array to grid is ensured by using fuzzy logic (FL) based maximum power point tracking (MPPT) controller. The proposed MPPT technique provides fast and high performances under variable climate conditions as well as sudden variation of irradiance level. Change of measured photovoltaic power and its rate of change are the input variables of the proposed fuzzy logic controller while the change in reference current is deﬁned as the output variable. In order to meet the power quality required by the international standards, a Space Vector Modulation (SVM) controlled three-level T-type inverter and a series LCL filter are used. To show the effectiveness of the proposed grid-connected system, Matlab/Simulink software is used to carry out the simulation part. Obtained results show the role of each component, particularly the response of the maximum power tracking, the quality of the injected power, the unity power factor operation and the system’s efficiency