Ahmed Lagrioui

• Doctor of Engineering
• National High School of Arts and professions in Meknes (ENSAM)

The choice of energy command for a doubly-fed induction generator (DFIG) is essential to ensure high energy fineness and good operation. Direct power command (DPC) is one of the approaches used to command power due to its simplicity, ease of realization, and quick dynamic response. However, despite these advantages, the DPC is described by problems...

Wind turbines are crucial to global renewable energy production, yet selecting the optimal turbine for urban and park environments remains challenging. In this context, this study addresses this issue by introducing a novel methodology using the Vital-Immaterial and Mediocre Method (VIMM), a subjective and goal-oriented weighting approach applied f...

This paper presents a comprehensive evaluation of heat transfer fluid (HTF) performance in concentrated solar power (CSP) systems, focusing on the Noor I CSP plant in Ouarzazate, Morocco. Using the System Advisor Model (SAM) from the National Renewable Energy Laboratory (NREL), simulations were conducted to assess the thermal and economic performan...

The direct power command (DPC) of the doubly-fed induction generators (DFIG) has garnered increasing attention due to its simplicity, ease of implementation, and fast dynamic response that distinguished it from other controls. Recently, nonlinear controllers have been suggested to improve the DPC robustness, in particular the minimization of the DF...

Wind turbines are currently one of the world’s most commonly employed renewable energy generation technologies. The selection of an optimal wind farm site might be challenging considering the variety of site possibilities in the same region. Using the second scenario of a novel subjective and goal-oriented weighting technique called the VitalImmate...

Noor 1 is a parabolic trough concentrating solar power (CSP) plant in Morocco, about 10 km to the north-east of Ouarzazate. It concerns the first and largest cylindrical-parabolic mirror complex in Africa. With a nominal capacity of 160 Mwe, the plant covers 480 hectares of solar field. Masen is operating the project, which cost over 7,000 million...

Several algorithms have been offered to track the maximum power point when we have one maximum power point. In this paper, we will propose an improved maximum power point tracking method for the photovoltaic system that utilizes a modified PSO algorithm. The main advantage of the method is the decreasing of the steadystate oscillation (to practical...

This new paper describes an experimental investigation of a proportional-integral (PI) controller that uses feedback control to regulate an energy system that uses multi-rotor wind energy systems. Pulse width modulation (PWM) is used by the proposed controller to control the power of the doubly-fed induction generator controlled by direct power con...

The super-twisting sliding mode controller (STSMC) is considered one of the simplest and easiest to implement nonlinear controls, as it can be easily applied in industrial systems. Using this controller leads to reducing the phenomenon of chatter and significantly increasing the durability of the systems. However, this controller has several drawba...

In this recent research article, intelligent nonlinear direct power control (DPC) was proposed to ensure the good functioning of DFIGs during faults in the electrical distribution grid and to ensure the control of the powers of the stator through the injection of the reactive power into the electrical distribution grid in order to guarantee the ret...

The design of robust and precise control of obtaining maximum power yield is an important area of research in wind engineering. In the context of maximizing the amount of power extraction in wind energy conversion systems (WECS), this research work proposes and evaluates five MPPT algorithms. These types are respectively a proportional integral con...

Developing precise and robust algorithms that can help in obtaining maximum power yield in a variable speed wind turbine is an important area of research in wind engineering. The present manuscript proposes a technique that utilizes a second-generation CRONE controller for the maximum power tracking technique (MPPT) to maximize power generation in...

The voltage sag, caused by the short-circuit faults in transmission and subtransmission system of the wind energy conversion system (WECS), produces a transient stator flux (DC component) in the stator windings of the doubly fed induction generator (DFIG).This phenomenon damaging the fragile inverter and the system gearbox. In fact, the dynamic equ...

In this paper, an improved direct power command strategy based on backstepping was designed to ensure the proper operation of DFIG during the electrical grid faults and to control the stator powers through the injection of the reactive power into the electrical grid to guarantee the voltage return. This strategy contributes to the elimination of hi...

To successfully carry out a wind energy conversion system, it is necessary to simultaneously control the rotor and the grid side. This paper proposes a doubly-fed induction generator's predictive power control. While the powers are controlled indirectly through currents, the latter is controlled using the deadbeat command. Based on discrete-time, t...

To successfully carry out a wind energy conversion system, it is necessary to simultaneously control the rotor and the grid side. This paper proposes a doubly-fed induction generator's predictive power control. While the powers are controlled indirectly through currents, the latter is controlled using the deadbeat command. Based on discrete-time, t...

The purpose of this study is to design a real-time current predictive control for a wind energy conversion system (WECS) using a doubly-fed induction generator (DFIG). A wind emula-tor and a test bench for assessing control strategies were conceptualized. The DSPACE DS1104 board served as the foundation for the design of a wind emulation system. Wh...

The conception of a control strategy of Doubly-Fed Induction Generator (DFIG) for providing a high quality of energy, without harmonic accumulations, to the electric network is a real challenge because of the no-linearity of the system and the variable wind speed. In this work, two commands based on two technics have been developed and then tested...

The design of a control technique of doubly-fed induction generator (DFIG) for providing a high quality of energy, without harmonics accumulation, to the electrical grid is a real challenge because of the nonlinearity of the wind energy conversion system (WECS). In this paper, an improved robust command has been developed and then tested in order t...

The use of PMSM motors is very important in industry today; they require great robustness in terms of performance (speed, torque, flux, etc.). In this work we present a new control strategy to improve the performance of the machine given its non-linear model. This technique based on a new non-linear predictive controller, which is based on the expa...

In the recent years, the development and the exploitation of renewable energy knew a great evolution. Among these energy resources, the wind power represents an important potential for that the wind system has been the subject of several researches. The purpose of this study is to improve the power extracted from wind energy, taking into considerat...

In a distributed generation system, divers renewable agents are connected to the low voltage 3 phase utility grid by an inverter which is used as power condition and must assurance the higher efficiency of the renewable agent. To achieve this level of efficiency, a unitary power factor between the utility grid voltages and the inverter currents is...

Several algorithms have been offered to track the Maximum Power Point when we have one maximum power point. Moreover, fuzzy control and neural was utilized to track the Maximum Power Point when we have multi-peaks power points. In this paper, we will propose an improved Maximum Power Point tracking method for the photovoltaic system utilizing a mod...

This paper develops a new strategy to develop and improve the robust and performance of the speed regulation for doubly-fed induction machine (DFIM), whose is connected to a voltage inverter pulse width modulation (PWM) by the windings stator and rotor independently. This work is of objective to stabilise the speed of the system DFIM for use in the...

In this paper, we present a new contribution for control of wind turbine energy conversion system. A new observer Backstepping control of DFIG-Generators for Wind Turbines Variable-Speed is developed. A new control technique for wind systems is presented. This control scheme is based on an adaptive pole placement control strategy integrated to a Ba...

Low-Speed Sensorless Backstepping control of for the Double-Fed Induction Machine Generator Drive

Ce présent travail présente la modélisation d'un système d'énergie éolienne en utilisant le logiciel de simulation Matlab/Simulink a la base des modèles mathématiques. Ce système est composé d’une éolienne, d'une machine asynchrone et de convertisseurs de puissance. La génératrice , ayant pour entrée le couple et la vitesse du vent, est modélisée p...

In this paper, we present a nonlinear robust control of active and reactive power by the use of the technique Backstepping a double-fed asynchronous generator (DFIG) system incorporated in a wind. The power transfer between the stator and the network is carried out by acting on the rotor via a bidirectional signal converter. A new control technique...

This paper presents a new strategy to improve the performances of speed control of a Double-Fed Induction Machine (DFIM), whose stator and rotor windings are connected to a voltage inverter PWM (Pulse Width Modulation) independently. This work shows the robustness of the adaptive Backstepping control strategy applied to the DFIM. The main objective...

In this paper, we present a nonlinear robust control of active and reactive power by the use of the technique Backstepping a double-fed asynchronous generator (DFIG) system incorporated in a wind. The power transfer between the stator and the network is carried out by acting on the rotor via a bidirectional signal converter. A new control technique...

In This paper we present a new contribution of fuzzy logic for electrical machine control. We are interested to the control direction of the rotor flux applied to Doubly-Fed Induction Generators (DFIG)At first, the principle of operation and modeling are applied to the DFIG is developed and introduced. Thereafter, the Fuzzy approach is applied to t...

In This paper we present a new contribution of fuzzy logic for electrical machine control. We are interested to the control direction of the rotor flux applied to Doubly-Fed Induction Generators (DFIG) At first, the principle of operation and modeling are applied to the DFIG is developed and introduced. Thereafter, the Fuzzy approach is applied to...

In this paper, we are interested, in a first time, at the study and the implementation of a V/f control for induction machine in real time. After, We are attached to a comparison of the results by simulation and experiment for, speed responses, flux and currents of the real machine, with a DSPACE card and model established by classical identificati...

In this paper, we present a new contribution of FPGAs (Field-Programmable Gate Array) for control of electrical machines. The adaptative Backstepping control approach for a permanent magnet synchronous motor drive is discussed and analyzed. We present a Matlab&Simulink simulation and experimental results from a benchmark based on FPGA. The Backstep...

In this paper, we present a nonlinear robust control of active and reactive power by the use of the technique Backstepping a double-fed asynchronous generator (DFIG) system incorporated in a wind. The power transfer between the stator and the network is carried out by acting on the rotor via a bidirectional signal converter. Initially, a control st...

In this paper, we have presented a general study of self excited induction generator used in isolated renewable energy conversion source. Tthe behaviour of generated voltage under variable load, rotor speed and excitation capacitance is presented. Also, we have proposed a robust controller suitable in order to control the terminal DC voltage under...

In this paper, the adaptive and non-adaptive nonlinear Backstepping control approach for a permanent magnet synchronous motor drive is discussed and analyzed. We present a Matlab&Simulink simulation and experimental results from a benchmark based on FPGA. The design of a controller for a nonlinear system where the state vector dimension is high, ca...

In this paper, we present a nonlinear robust control of active and reactive power by the use the PI regulators control (FOC) a Double-Fed Asynchronous Generator (DFIG) system incorporated in a windturbine. The power transfer between the stator and the network grid is carried out by acting on the rotor via a bidirectional signal converter. Initially...

In this paper, the sliding-mode torque and flux control with nonlinear non adaptive backstepping combined approach for an permanent magnet synchronous motor drive is proposed. We present a new contribution of FPGA for control of electrical machines. First, the Indirect Sliding Mode Observer for PMSM speed and rotor position is used to realize senso...

In this paper, the nonlinear non adaptive backstepping combined with the slidingmode torque and flux control approach for an permanent magnet synchronous motor drive is proposed. we present a new contribution of FPGAs for control of electrical machines. First, the adaptive backstepping control approach is utilized to obtain the robustness for misma...

In this paper, a backstepping controller of Induction Motor (IM) is proposed using the fourth order model in fixed two frame reference axis with rotor flux and stator currents as state variables. The approach of backstepping requires, generally, that the nonlinear system is in strict feed-back loop. To implement this strategy over the IM, some tran...

This paper presents a novel speed control technique for a permanent magnets synchronous (PMSM) drive based on newly nonlinear backstepping technique. We design a not adaptive speed regulator for a permanent-magnet synchronous motor (PMSM). In this paper, we present a new contribution of FPGAs (Field-Programmable Gate Array) for control of electrica...

This paper starts with an overview of FPGA technology development, followed by a presentation of design methodologies, development tools and relevant CAD environments, including the use of portable hardware description languages and system level programming/design tools. In this paper, a new contribution for the FPGA-Based implementation of control...

In this paper, we propose an approach intelligent artificial technique for improvement of Direct Torque Control (DTC) of Permanent Magnet Synchronous Motor such as artificial neural network (ANN), applied in switching select voltage vector and estimator flux and torque. This intelligent technique was used to replace, on the one hand the conventiona...

This paper presents a discreet linear predictive control (DLPC). This strategy is applied to permanent magnet synchronous motor (PMSM) for monitoring the speed at trajectory and rejection of disturbance. The predictive control law is obtained by using a cost function and a Taylor series to perform prediction in a finite horizon. No information on t...

In this paper is presents a detailed description of the structure by Indirect Sliding Mode of Permanent Magnet Synchronous Machine PMSM. Experimental results carried from a prototyping platform are given to illustrate the efficiency and the benefits of the proposed approach and the various stages of implementation of this structure in FPGA.

In this paper, a nonlinear adaptive speed controller for a permanent magnet synchronous motor (PMSM) based on a newly developed adaptive backstepping approach is presented. The exact, input-output feedback linearization control law is first introduced without any uncertainties in the system. However, in real applications, the parameter uncertaintie...

In this paper, we present a new contribution of FPGAs (Field-Programmable Gate Array) for control of electrical machines. A detailed description of the structure of direct torque control for PMSM drive, a bench test was realized by a prototyping platform, the experimental results obtained show the effectiveness and the benefit of our contribution a...

In this paper, we present a new contribution of FPGAs (Field-Programmable Gate Array) for control of electrical machines. A detailed description of the structure of direct torque control for PMSM drive, a bench test was realized by a prototyping platform, the experimental results obtained show the effectiveness and the benefit of our contribution a...

The performance of FPGA increases continually, thus in many applications they can be an interesting alternative to DSPs. The aim of this work is to present the contribution of FPGAs for electrical machines control. The features of FPGAs and their environment will be presented first. Then a detailed description of the structure by Direct Torque Cont...

In this article, we present the mathematical model of the permanent magnet synchronous motor (PMSM) permitting the simulation of its dynamic behavior under the MATLAB/SIMULINK environment. This model is based on the Park transformation. This paper proposes a realization of robust speed and current control for the PMSM using a PI-Regulator with and...

This paper starts with an overview of FPGA technology development, followed by a presentation of design methodologies, development tools and relevant CAD environments, including the use of portable hardware description languages and system level programming/design tools. In this paper, a new contribution for the FPGA-Based implementation of control...

The Direct Torque Control is a technique increasingly used for the ordering of the invertors and synchronous machine. This system can be regarded as a hybrid dynamic system whose continuous component is the permanent magnet synchronous machine and the discrete component, the inverter of tension. In this article, we propose a modeling of this whole...

Direct Torque Control (DTC) is one of the most excellent control strategies of torque and flux control of PMSM. It is considered as an alternative to the Field Oriented Control (FOC) or vector control technique. These two control strategies are different on the operation principle but their objectives are the same. Torque Control of a Permanent Mag...