Papers by Hacene Bouzekri
International Journal of Power Electronics and Drive Systems (IJPEDS)
The degree of reliability is one of the main issues in having the uninterrupted operation of faul... more The degree of reliability is one of the main issues in having the uninterrupted operation of fault-tolerant measurement and control systems. This paper presents a technique for detecting and localizing current sensor fault in doubly fed induction generator wind turbine systems (DFIG-WT). For this purpose, a methodology divided into three steps has been carried out and is presented as follows: the first step is the application of the zero-sequence component as an indicator of the presence of the sensor fault. The second step is based on the application of Concordia transformation on the current signals to generate different criteria for localizing the faulty sensor. Finally, an artificial neural network model is developed to analyze the localization criteria and identify the faulty sensor. All simulations are carried out in MATLAB/Simulink environment. Results show that the proposed technique is effective and can be used in real-time fault detection and localization in the DFIG-WT.
International Journal of Modelling, Identification and Control, 2018
This paper focuses on the design and real-time implementation of a hybrid fractional order contro... more This paper focuses on the design and real-time implementation of a hybrid fractional order controller (HFC) for a grid connected variable speed wind energy conversion system (WECS). The HFC was integrated to current vector control and direct current control (DCC) to guarantee maximum power extraction and ensuring unity power factor of the grid side. The proposed HFC employs a conventional PI controller, a fractional order PI controller (FO-PI), and a switching algorithm (SA). The parameters of the HFC were calculated using frequency method then adjusted by employing a PSO algorithm. To evaluate the performance of the proposed controller, an experimental test bench has been built in the laboratory using dSPACE1104 card. The WECS contains a wind turbine emulator and permanent magnet synchronous generator (PMSG) feed a nonlinear load and has been connected to the grid via back-to-back converters. The experimental results demonstrate the superiority of the proposed controller over integer order controllers in steady and transient states by realising maximum power extraction and improving the grid-side power factor.
Contribution à la commande des machines synchrones à aimants permanents
Ce memoire est consacre au developpement de structures de regulation de courant des machines sync... more Ce memoire est consacre au developpement de structures de regulation de courant des machines synchrones a aimants permanents (MSAP). Le premier volet de notre travail concerne la commande 120. Afin d'eliminer les surtensites qui apparaissent pendant les commutations d'une phase sur l'autre, a basse vitesse, une commande basee sur la mesure de la somme des courants des diodes du haut et des transistors du bas est proposee. Concernant les ondulations du couple engendrees par les formes d'ondes des FEM, nous avons propose une strategie de commande des courants de la machine dans un repere (alpha, beta) lie au stator permettant de les minimiser. Afin de minimiser les creux de couple qui apparaisse a grande vitesse, une commande fondee sur le controle de decroissance du courant commute est introduite. Le deuxieme volet de cette these concerne la commande vectorielle des MSAP et sa decentralisation. En premier, nous avons propose une commande qui permet le controle du vect...
TELKOMNIKA (Telecommunication Computing Electronics and Control), 2017
The brushless doubly-fed machine (BDFM) continues to attract increasing interest for applications... more The brushless doubly-fed machine (BDFM) continues to attract increasing interest for applications in wind generation where, robustness and low servicing costs are its principles advantages. The construction aspect of the BDFM has been widely studied and currently this machine can be build with good performances. However, the control aspect remains difficult to achieve and some studies show that the BDFM is less stable than the doubly-fed induction machine. To explore the BDFM stability in all operating mode, this paper proposes a stability analysis of a grid-connected variable speed wind turbinebased BDFM. For this purpose, a linearized small signals mathematical model is proposed which takes into account both grid and control disturbances. Then, the effect of electrical parameters variation and operating speed change on the stability of the BDFM has been studied. The stability has been investigated through simulation implementation. The obtained results demonstrate the validity and the superiority of the proposed model.
Experimental enhancement of fuzzy fractional order PI+I controller of grid connected variable speed wind energy conversion system
Energy Conversion and Management, 2016
Abstract In this paper, fuzzy fractional order PI+I (FFOPI+I) controller for grid connected Varia... more Abstract In this paper, fuzzy fractional order PI+I (FFOPI+I) controller for grid connected Variable Speed Wind Energy Conversion System (VS-WECS) is proposed. The FFOPI+I controller is applied to control a Permanent Magnet Synchronous Generator (PMSG) connected to the grid and nonlinear load through a back-to-back AC-DC-AC PWM converter. The control strategy of the Machine Side Converter (MSC) aims, at first, to extract a maximum power under fluctuating wind speed. Then, the Grid Side Converter (GSC) is controlled to improve the power quality and ensure sinusoidal current in the grid side. The FFOPI+I controller implements a Fuzzy Logic Controller (FLC) in parallel with Fractional Order PI (FOPI) and conventional PI controllers by having a commune proportional gain. The FLC changes the integral gains at runtime. The initial parameters of the FFOPI+I controller were calculated using a frequency method to create a search space then the PSO algorithm is used to select the optimal parameters. To evaluate the performance of the proposed controller in steady and transient states, an experimental test bench has been built in laboratory using dSPACE1104 card. The experimental results demonstrate the effectiveness and feasibility of the FFOPI+I over FOPI and conventional PI controllers by realizing maximum power extraction and improving the grid-side power factor for a wide range of wind speed.
Contribution a la commande des machines synchrones a aimants permanents
Http Www Theses Fr, 1995
This paper proposes a modified fractional order PI controller (MFO-PI) for grid connected variabl... more This paper proposes a modified fractional order PI controller (MFO-PI) for grid connected variable speed wind energy conversion system (WECS). The proposed MFO-PI employs an integer integral action and fractional order integral action, and a supervisor to select the more suitable integral action looking to the working conditions. The parameters of the MFO-PI controller have been tuned using frequency method to realize the isodamping feature. The MFO-PI controller is used to guarantee maximum power extraction on the first and obtain power factor unity on the other hand. To investigate the efficiency of the proposed controller, an experimental bench has been carried out. The experimental results demonstrate the superiority of the proposed controller over integer order controllers for a wide range of wind speed.
International Journal of Power Electronics and Drive Systems (IJPEDS)
The degree of reliability is one of the main issues in having the uninterrupted operation of faul... more The degree of reliability is one of the main issues in having the uninterrupted operation of fault-tolerant measurement and control systems. This paper presents a technique for detecting and localizing current sensor fault in doubly fed induction generator wind turbine systems (DFIG-WT). For this purpose, a methodology divided into three steps has been carried out and is presented as follows: the first step is the application of the zero-sequence component as an indicator of the presence of the sensor fault. The second step is based on the application of Concordia transformation on the current signals to generate different criteria for localizing the faulty sensor. Finally, an artificial neural network model is developed to analyze the localization criteria and identify the faulty sensor. All simulations are carried out in MATLAB/Simulink environment. Results show that the proposed technique is effective and can be used in real-time fault detection and localization in the DFIG-WT.
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Papers by Hacene Bouzekri