Bachir Kedjar - Academia.edu (original) (raw)

Papers by Bachir Kedjar

Research paper thumbnail of Optimal control of a grid connected variable speed wind energy conversion system based on squirrel cage induction generator

IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society, 2012

Research paper thumbnail of LQ control of a three-phase four-wire shunt active power filter based on three-level NPC inverter

2008 Canadian Conference on Electrical and Computer Engineering, 2008

This paper presents the design and implementation of a linear quadratic regulator (LQR) with Inte... more This paper presents the design and implementation of a linear quadratic regulator (LQR) with Integral action (LQIR) for a three-phase four-wire shunt active power filter using a three-level neutral point clamped inverter (SAF-NPC). The integral action is added so as to cancel the steady state errors for reference tracking or disturbance rejection knowing that the standard LQR provides only proportional

Research paper thumbnail of LQR with integral action applied to a wind energy conversion system based on doubly fed induction generator

2011 24th Canadian Conference on Electrical and Computer Engineering(CCECE), 2011

This paper presents the design of a Linear Quadratic Regulator (LQR) with Integral action (LQRI) ... more This paper presents the design of a Linear Quadratic Regulator (LQR) with Integral action (LQRI) applied to a wind energy conversion system (WECS) based on doubly fed induction generator (DFIG). The controller is used to achieve speed regulation for maximum power extraction from the wind turbine, DC bus voltage regulation, to make the machine draw its magnetizing current only from

Research paper thumbnail of LQR with Integral Action for Phase Current Control of Constant Switching Frequency Vienna Rectifier

2006 IEEE International Symposium on Industrial Electronics, 2006

This paper deals with the design of a linear quadratic regulator (LQR) with integral action (LQIR... more This paper deals with the design of a linear quadratic regulator (LQR) with integral action (LQIR) to improve dynamic performance of a three-phase Vienna rectifier. The integral action is added to cancel the steady state errors knowing that the standard LQR controller provides only proportional gains. The controller is designed to achieve overall output voltage regulation, DC load unbalance compensation

Research paper thumbnail of LQR with Integral Action to Enhance Dynamic Performance of Three-Phase Three-Wire Shunt Active Filter

2007 IEEE Power Electronics Specialists Conference, 2007

Research paper thumbnail of Three-phase four-wire Vienna I rectifier with active filter function including neutral current mitigation

2009 IEEE International Symposium on Industrial Electronics, 2009

In this paper a Vienna I rectifier is used to achieve active filtering function including the neu... more In this paper a Vienna I rectifier is used to achieve active filtering function including the neutral wire current compensation (VR-AF) in a three-phase four-wire system. A linear quadratic with integral action regulator (LQIR) is designed to achieve overall DC bus voltage regulation, harmonics, reactive power and load's neutral current compensations. The converter model is set in the d-q-o rotating reference frame. The latter is augmented with the integral of the q and o components of the (VR-AF) currents and overall DC bus voltage to achieve integral action. The converter is controlled as a multi-input multi-output (MIMO) system and a fixed PWM at 10 kHz is used to generate the gating signals of the power devices. The system is tested for harmonics, reactive power and load unbalance compensation for balanced/unbalanced loads. The simulation results obtained with SPS and Simulink of Matlab show good performance in terms of overall DC bus voltage regulation; line currents shaping, balancing and neutral current mitigation which proved the effectiveness of the adopted control strategy.

Research paper thumbnail of Single-Phase Active Front End Converter with series compensation

2006 IEEE International Symposium on Industrial Electronics, 2006

This paper presents the study of series compensation effects on a single-phase active front end r... more This paper presents the study of series compensation effects on a single-phase active front end rectifier (AFER). It's known that this kind of converter with a highly sourced inductor cannot transfer a large amount of power to the load without over sizing the converter. That's the case when a synchronous machine with a large transverse reactance is used in wind

Research paper thumbnail of DSP-Based Implementation of an LQR With Integral Action for a Three-Phase Three-Wire Shunt Active Power Filter

IEEE Transactions on Industrial Electronics, 2000

This paper presents the design and implementation of a linear quadratic regulator (LQR) with inte... more This paper presents the design and implementation of a linear quadratic regulator (LQR) with integral action (LQRI) for a three-phase three-wire shunt active filter (SAF). The integral action is added so as to cancel the steady-state errors for reference tracking or disturbance rejection, knowing that the standard LQR provides only proportional gains. The controller is designed to achieve DC bus

Research paper thumbnail of Vienna Rectifier With Power Quality Added Function

IEEE Transactions on Industrial Electronics, 2000

ABSTRACT The aim of this paper is to introduce power quality added function to the standard Vienn... more ABSTRACT The aim of this paper is to introduce power quality added function to the standard Vienna rectifier in order to compensate reactive power and to cancel current-type harmonics drawn by nonlinear loads connected to the same point of common coupling. A theoretical investigation that demonstrates the ability of such topology to compensate harmonics and limited reactive power is first presented. Then, the design and implementation of a linear quadratic regulator with integral action is presented. The converter is controlled as a whole i.e., a multiple-input–multiple-output system, and uses an augmented model that was developed in the ddd–$q$ frame. Experimental results obtained with a digital-signal-processor-based DS1103 controller and the converter operating at a 20-kHz switching frequency proved the effectiveness of the theoretical study and the high performance of the proposed control strategy in compensating load harmonics and limited reactive power.

Research paper thumbnail of Modeling, control and simulation of DFIG for maximum power point tracking

This paper deals with the modeling, analysis, control and simulation of a doubly-fed induction ge... more This paper deals with the modeling, analysis, control and simulation of a doubly-fed induction generator (DFIG) driven by a wind turbine. This grid connected wind energy conversion system (WECS) is composed of DFIG and two back-to-back PWM voltage-source converters in the rotor circuit. A mathematical model of the machine, derived in an appropriate dq reference frame is established. The grid voltage oriented vector control is used for the grid side converter (GSC) in order to maintain a constant DC bus voltage and to compensate for reactive power at the power network. The stator voltage orientated vector control is adopted in the rotor side converter (RSC) control strategy, providing efficient handling of active and reactive power at the stator, as well as a maximum power point tracking (MPPT) method for the DFIG-based wind turbine. The proposed system is simulated for different operating conditions to illustrate the reliability of the control technique. Corresponding system simulat...

Research paper thumbnail of Optimal control of a grid connected variable speed wind energy conversion system based on squirrel cage induction generator

IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society, 2012

Research paper thumbnail of LQ control of a three-phase four-wire shunt active power filter based on three-level NPC inverter

2008 Canadian Conference on Electrical and Computer Engineering, 2008

This paper presents the design and implementation of a linear quadratic regulator (LQR) with Inte... more This paper presents the design and implementation of a linear quadratic regulator (LQR) with Integral action (LQIR) for a three-phase four-wire shunt active power filter using a three-level neutral point clamped inverter (SAF-NPC). The integral action is added so as to cancel the steady state errors for reference tracking or disturbance rejection knowing that the standard LQR provides only proportional

Research paper thumbnail of LQR with integral action applied to a wind energy conversion system based on doubly fed induction generator

2011 24th Canadian Conference on Electrical and Computer Engineering(CCECE), 2011

This paper presents the design of a Linear Quadratic Regulator (LQR) with Integral action (LQRI) ... more This paper presents the design of a Linear Quadratic Regulator (LQR) with Integral action (LQRI) applied to a wind energy conversion system (WECS) based on doubly fed induction generator (DFIG). The controller is used to achieve speed regulation for maximum power extraction from the wind turbine, DC bus voltage regulation, to make the machine draw its magnetizing current only from

Research paper thumbnail of LQR with Integral Action for Phase Current Control of Constant Switching Frequency Vienna Rectifier

2006 IEEE International Symposium on Industrial Electronics, 2006

This paper deals with the design of a linear quadratic regulator (LQR) with integral action (LQIR... more This paper deals with the design of a linear quadratic regulator (LQR) with integral action (LQIR) to improve dynamic performance of a three-phase Vienna rectifier. The integral action is added to cancel the steady state errors knowing that the standard LQR controller provides only proportional gains. The controller is designed to achieve overall output voltage regulation, DC load unbalance compensation

Research paper thumbnail of LQR with Integral Action to Enhance Dynamic Performance of Three-Phase Three-Wire Shunt Active Filter

2007 IEEE Power Electronics Specialists Conference, 2007

Research paper thumbnail of Three-phase four-wire Vienna I rectifier with active filter function including neutral current mitigation

2009 IEEE International Symposium on Industrial Electronics, 2009

In this paper a Vienna I rectifier is used to achieve active filtering function including the neu... more In this paper a Vienna I rectifier is used to achieve active filtering function including the neutral wire current compensation (VR-AF) in a three-phase four-wire system. A linear quadratic with integral action regulator (LQIR) is designed to achieve overall DC bus voltage regulation, harmonics, reactive power and load's neutral current compensations. The converter model is set in the d-q-o rotating reference frame. The latter is augmented with the integral of the q and o components of the (VR-AF) currents and overall DC bus voltage to achieve integral action. The converter is controlled as a multi-input multi-output (MIMO) system and a fixed PWM at 10 kHz is used to generate the gating signals of the power devices. The system is tested for harmonics, reactive power and load unbalance compensation for balanced/unbalanced loads. The simulation results obtained with SPS and Simulink of Matlab show good performance in terms of overall DC bus voltage regulation; line currents shaping, balancing and neutral current mitigation which proved the effectiveness of the adopted control strategy.

Research paper thumbnail of Single-Phase Active Front End Converter with series compensation

2006 IEEE International Symposium on Industrial Electronics, 2006

This paper presents the study of series compensation effects on a single-phase active front end r... more This paper presents the study of series compensation effects on a single-phase active front end rectifier (AFER). It's known that this kind of converter with a highly sourced inductor cannot transfer a large amount of power to the load without over sizing the converter. That's the case when a synchronous machine with a large transverse reactance is used in wind

Research paper thumbnail of DSP-Based Implementation of an LQR With Integral Action for a Three-Phase Three-Wire Shunt Active Power Filter

IEEE Transactions on Industrial Electronics, 2000

This paper presents the design and implementation of a linear quadratic regulator (LQR) with inte... more This paper presents the design and implementation of a linear quadratic regulator (LQR) with integral action (LQRI) for a three-phase three-wire shunt active filter (SAF). The integral action is added so as to cancel the steady-state errors for reference tracking or disturbance rejection, knowing that the standard LQR provides only proportional gains. The controller is designed to achieve DC bus

Research paper thumbnail of Vienna Rectifier With Power Quality Added Function

IEEE Transactions on Industrial Electronics, 2000

ABSTRACT The aim of this paper is to introduce power quality added function to the standard Vienn... more ABSTRACT The aim of this paper is to introduce power quality added function to the standard Vienna rectifier in order to compensate reactive power and to cancel current-type harmonics drawn by nonlinear loads connected to the same point of common coupling. A theoretical investigation that demonstrates the ability of such topology to compensate harmonics and limited reactive power is first presented. Then, the design and implementation of a linear quadratic regulator with integral action is presented. The converter is controlled as a whole i.e., a multiple-input–multiple-output system, and uses an augmented model that was developed in the ddd–$q$ frame. Experimental results obtained with a digital-signal-processor-based DS1103 controller and the converter operating at a 20-kHz switching frequency proved the effectiveness of the theoretical study and the high performance of the proposed control strategy in compensating load harmonics and limited reactive power.

Research paper thumbnail of Modeling, control and simulation of DFIG for maximum power point tracking

This paper deals with the modeling, analysis, control and simulation of a doubly-fed induction ge... more This paper deals with the modeling, analysis, control and simulation of a doubly-fed induction generator (DFIG) driven by a wind turbine. This grid connected wind energy conversion system (WECS) is composed of DFIG and two back-to-back PWM voltage-source converters in the rotor circuit. A mathematical model of the machine, derived in an appropriate dq reference frame is established. The grid voltage oriented vector control is used for the grid side converter (GSC) in order to maintain a constant DC bus voltage and to compensate for reactive power at the power network. The stator voltage orientated vector control is adopted in the rotor side converter (RSC) control strategy, providing efficient handling of active and reactive power at the stator, as well as a maximum power point tracking (MPPT) method for the DFIG-based wind turbine. The proposed system is simulated for different operating conditions to illustrate the reliability of the control technique. Corresponding system simulat...