Rachid Boukenoui | Saad Dahlab University (original) (raw)
Papers by Rachid Boukenoui
International Conference on Communications and Electrical Engineering (ICCEE), 2018
This paper introduces an effective design and control of a two-stage standalone photovoltaic syst... more This paper introduces an effective design and control of a two-stage standalone photovoltaic system consisting of a DC-DC boost converter as the first stage and a single-phase full H-bridge inverter as the second stage. The DC-DC converter controlled by Perturb and Observe MPPT to achieve maximum electric power under different weather conditions. Moreover, the full H-bridge inverter topology along with two control loops are used as a link between the system and the load. To mitigate noises that could occur in both voltage and current, a second order passive Inductor Capacitor(LC) filter is conceived. Implementation of the system is done by Matlab/Simulink Software and relevant results are discussed.
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International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS), 2019
Tested by the manufacturer, the electrical characteristics of PV modules are rated at the Standar... more Tested by the manufacturer, the electrical characteristics of PV modules are rated at the Standard Test Conditions (STC; 1000 W/m 2 and 25 °C). But under real working conditions where the temperature and the irradiance are different from those of STC, the electrical specifications are definitely affected. Which in turn, affect the conversion efficiency and the Fill factor (FF). Here, the conversion efficiency and the FF of three different PV modules technologies: Poly-Crystalline Silicon (Poly C-Si), Copper Indium Gallium Selenide (CIGS) and Cadmium Telluride (CdTe) under STC and real working conditions of solar irradiance and temperature are evaluated based on real data, then analyzed. To this, a test facility is employed to carry out the required tests for the aforementioned PV technologies. The investigation presented in this paper aims to seek which PV technology is preferable in a specific level of irradiance and temperature.
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The First International Conference on Materials, Energy and Environment (MEE’2020), 2020
A Two-stage single-phase photovoltaic islanded micro-grid is investigated within this paper. The ... more A Two-stage single-phase photovoltaic islanded micro-grid is investigated within this paper. The used DC-DC boost converter, which steps up the Photovoltaic generator output voltage, is controlled by applying an improved fuzzy-based Maximum Power Point Tracking (MPPT) technique. A bidirectional DC-DC converter is incorporated between the battery storage and DCinverter side to manage the power flow, through an outer PI voltage control and a fuzzy inner current control. The H-bridge inverter is used to supply AC loads. This latter is controlled via a fuzzy-PWM regulator to get sinusoidal voltage and current. The control is fulfilled by investigating the proposed management strategy. The whole system is implemented and tested in MATLAB/Simulink platform under illumination changes. The results obtained clearly show an increase in power quality, fast response time, and better performance of the proposed structure.
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1st International Conference on Communications, Control Systems and Signal Processing (CCSSP), 2020
This paper proposes a Management Algorithm (MA) for a hybrid PV/battery stand-alone system. The m... more This paper proposes a Management Algorithm (MA) for a hybrid PV/battery stand-alone system. The main purpose is to ensure the ongoing availability of energy for supplying the load. Meanwhile, guarantee a maximum of stability during perturbations of production and Partial Shading (PS) conditions. The interfaced power electronic converters for the Photovoltaic Generator (PVG) and battery are controlled separately. To harvest the maximum power from the PVG and control the boost converter, a Hill Climbing-Particle Swarm Optimization (HC-PSO) is used. A double PI control loop is designed to manage the bidirectional buck-boost converter interfacing the battery storage to the load side. The aim of this latter is to maintain the delivered power to the load under varying weather conditions. Simulations are performed using MATLAB/ Simulink. Then, three cases are considered to be analyzed for assessing the consistency of the MA: (1) under standard conditions when the rated power is sufficient to charge the battery and supply the load; (2) under fast varying irradiance conditions and (3) under PS. The results confirm the reliability and effectiveness of the proposed MA in controlling stand-alone PV systems.
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Fourth International Conference on Electrical, Computer and Communication Technologies (ICECCT), 2021
This paper aims to analyze the influence of setting different perturbation step-size and frequenc... more This paper aims to analyze the influence of setting different perturbation step-size and frequency in Perturb and Observe (P&O) Maximum Power Point Tracking (MPPT) algorithm for photovoltaic (PV) systems. P&O algorithm is commonly used in commercial PV converters due to easy implementation, low computational burden and low cost. However, P&O MPPT algorithm suffers high steady-state oscillation around the maximum power point (MPP) and tracking confusion during rapid change in irradiance. This results in a considerable high energy loss and low tracking efficiency. Thus, this paper presents an improved method on how to determine a suitable perturbation step-size and frequency for P&O algorithm under dynamic weather conditions. Both static and dynamic MPPT efficiency were tested according to the European Standard 50530 (EN50530). A dc-dc single-ended primary inductor converter (SEPIC) is employed as an intermediate stage between the PV generator and the load. The tracking performance in terms of convergence speed toward MPP and the amplitude of oscillation around the MPP is investigated to observe the effect of different perturbation step-size and frequency.
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International Conference on Advances in Electronics, Control and Communication Systems (ICAECCS), 2023
in Microgrid (MG) systems, the output voltage controller within the primary control, called the "... more in Microgrid (MG) systems, the output voltage controller within the primary control, called the "inner control", is essential for regulating the output of the inverters and guaranteeing a high-stability operation. This paper addresses the modeling and design of the primary control's inner loops intended for voltage-controlled three-phase LC-filtered inverters forming an islanded MG. The designed inner controller is a dual-loop control structure, consisting of outer voltage and inner current control loops, implemented in the dq0-frame. Each control loop includes three PI controllers for the direct, quadrature, and DC (zero) components regulation. The modeling of the voltagecontrolled LC-filtered inverter, as well as the voltage/current inner control loops in the dq0-frame, is provided. The tuning of the controllers' parameters is done with the help of a developed straightforward and efficient design approach. Simulations are carried out in MATLAB/SimPowerSystem environment. The findings reveal that the designed inner controller for output voltage tracking is effective, with high performance in both steady and transient states, under a variety of operating conditions.
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Elsevier Ltd. Energy, 2017
This paper presents different Maximum Power Point Tracking (MPPT) methods belonging to different ... more This paper presents different Maximum Power Point Tracking (MPPT) methods belonging to different classes as well as two overviews. The first was about the procedures used in the test and evaluation of MPPTs. The second is an overview of Fuzzy Logic Controller (FLC) MPPTs and improved MPPTs. Conventional MPPTs such as Perturb and Observe (P&O), Hill Climbing (HC) and Incremental Conductance (InCond); Improved MPPTs (are the modified versions of conventional MPPTs) such as Improved Incremental Conductance (Improved-InCond) and intelligent MPPTs such as FLC have been implemented and tested under two different levels of irradiance and temperature. A detailed description about the hardware and software implementation platforms (designed and built in our laboratory) is provided. Based on measured data, the MPPTs under consideration have been evaluated and compared in terms of different criteria, showing the advantages and disadvantages of each one. The comparison results showed that Improved-InCond gives a fast convergence to the MPP(Maximum Power Point). Whereas, FLC is able to adapt to the variation of irradiance and temperature levels. Thereby, a good performance is obtained wherein the MPP is reached in a short time as well as the power ripples are very small.
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Elsevier Ltd. Applied Energy, 2017
h i g h l i g h t s A new MPPT method for PV systems under non-uniform irradiance conditions is p... more h i g h l i g h t s A new MPPT method for PV systems under non-uniform irradiance conditions is proposed. The proposed MPPT is composed of a novel identifying-loop and a tracking loop. Comparison with three classical MPPTs as well as six global MPPTs is carried out. High capability to extract the GMPP under non-uniform irradiance conditions. Fast convergence and low complexity are the main advantages of the proposed MPPT.
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International Journal of Power Electronics and Drive System , 2020
Maximum Power Point Tracking (MPPT) techniques are developed to harvest and supply maximum power ... more Maximum Power Point Tracking (MPPT) techniques are developed to harvest and supply maximum power to the load. This depends on the power generated and the MPPT accuracy. Under quick-changing weather conditions, Incremental Conductance (InCond) and numerous different algorithms may fail to track the exact Maximum Power Point (MPP) which may result in significant power loss. Fuzzy Logic (FL) based MPPT is quick and accurate in tracking the MPP, but the high complexity and the implementation difficulty are their main disadvantages. A novel FL-InCond MPPT improved technique is developed based on the features of InCond and FL techniques to overcome their drawbacks. The newly developed approach can automatically adjust the variation of the duty cycle for tracking the MPP with accuracy. The obtained results are compared with conventional Perturb and observe (P&O) and InCond MPPTs for grid-connected mode under fast weather conditions. It is demonstrated that the developed method outperforms the aforementioned MPPT techniques in terms of tracking response, efficiency and the delivered current quality.
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American Society of Mechanical Engineers, 2023
The essential aim of this study is to estimate the daily utilizability and useful energy of a fla... more The essential aim of this study is to estimate the daily utilizability and useful energy of a flatplate solar collector in Algeria for different climatic zones. For this purpose, a program based on Klein's method was developed to estimate the daily utilizability and the useful energy characterized by the optical efficiency and the global loss coefficient that are equal to 0.72 and 7.9 W/m 2 K, respectively. The seasonal potentials of the whole studied zones are represented by geographical maps; then, a parametric study is performed to see the influence of the inlet temperature of the heat transfer fluid, the optical efficiency, and the global coefficient losses on the average utilizability per month for each site. Subsequently, the utilizability variations considering different sites and during various months are analyzed in terms of the average temperature of the heat transfer fluid, the optical efficiency, and the coefficient of global losses. The results show that the usable potential produced by this type of solar collector is 1500-1700 MJ/m 2 in climatic zones E5 (Tanegrouft), E4 (Sahara), and E3 (Pre-Sahara) and is 1300 MJ/m 2 in climatic zones E2 (Highlands) and E1 (Coastal) during the summer season. While for the winter season, the usable potential is 500-700 MJ/m 2 in climatic zones E1 and E2, and 700-900 MJ/m 2 in E3, E4, and E5, which can be considered the most favorable zones for the conversion of the available solar energy into thermal one through the flat-plate solar collector. The study of the effect on the system performance considering usability has shown that the effects of the overall loss coefficient are more significant compared to optical efficiency.
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IET Generation, Transmission & Distribution, 2024
In voltage-controlled voltage source inverters (VSIs)-based microgrids (MGs), the inner control i... more In voltage-controlled voltage source inverters (VSIs)-based microgrids (MGs), the inner control is of prime interest task for guaranteeing safe and stable operation. In this paper, an in-depth investigation of the modelling, control design, and analysis of the voltage and current inner control loops intended for single-phase voltage-controlled VSIs is established. The main objective of this work is to provide a comprehensive study of the mathematical modelling, control design, and performance evaluation of the inner control's loops considering different proportional-integral (PI) controller types with and without compensation, and to determine the optimal scheme that can offer better performance in terms of implementation simplicity, robustness, and transient and steady-state responses. Thus, the mathematical closed-loop models of designed outer voltage and inner current control schemes based on PI, P, and feedforward controllers with and without compensation are, first, derived. Following this, a systematic and effective control design for tuning the different PI controllers' parameters is proposed. Furthermore, an analysis revealing the performance of the designed voltage and current control schemes is provided. This analysis enables us to choose a P controller and PI feedforward controller for the current control loop and the voltage control loop, respectively. The chosen P and PI controllers should be simple; meanwhile, they should offer a wide bandwidth. A simulation study is carried out in MATLAB/Simulink software to assess the performance of the adopted inner control scheme for both linear and non-linear loads. In addition, an experimental setup, based on a TMS320F2837xD μC, of a single-phase VSI supplying linear and non-linear loads is built to verify the effectiveness and the robustness of the adopted inner controller. The results demonstrated: (1) the necessity of introducing the compensation term, which is responsible for offering control improvement against voltage perturbation, (2) the high tracking performance of the chosen controller in terms of dynamic and steady-state responses as well as its simplicity of implementation.
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in Microgrid (MG) systems, the output voltage controller within the primary control, called the "... more in Microgrid (MG) systems, the output voltage controller within the primary control, called the "inner control", is essential for regulating the output of the inverters and guaranteeing a high-stability operation. This paper addresses the modeling and design of the primary control's inner loops intended for voltage-controlled three-phase LC-filtered inverters forming an islanded MG. The designed inner controller is a dual-loop control structure, consisting of outer voltage and inner current control loops, implemented in the dq0-frame. Each control loop includes three PI controllers for the direct, quadrature, and DC (zero) components regulation. The modeling of the voltagecontrolled LC-filtered inverter, as well as the voltage/current inner control loops in the dq0-frame, is provided. The tuning of the controllers' parameters is done with the help of a developed straightforward and efficient design approach. Simulations are carried out in MATLAB/SimPowerSystem environment. The findings reveal that the designed inner controller for output voltage tracking is effective, with high performance in both steady and transient states, under a variety of operating conditions.
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This paper investigates the use of a new global optimization algorithm that is based on Taguchi m... more This paper investigates the use of a new global optimization algorithm that is based on Taguchi method to determine the performance parameters of selfexcited induction generator being driven by variable speed wind. This analysis is based on solving equations obtained from the per-phase equivalent circuit of the induction generator. The equations have two unknowns namely the frequency and the magnetizing reactance. Both unknown are strongly dependent on the wind turbine speed, the capacity of the excitation, the load being connected at the terminals of the stator and eventually the per-phase equivalent circuit parameters. The resulting equations are nonlinear and subsequently to solve them one can employ either gradient-based algorithms or heuristic algorithms. This paper uses a new heuristic algorithm based on the Taguchi method which, in addition to its global research capability, offers superior characteristics in terms of accuracy and ease of implementation. A comparison with recently published optimization methods is carried out to show its performances in terms of accuracy and ease of implementation. The MATLAB software will be used to perform this analysis on a machine of 0.75 kW while some will be validated experimentally to confirm the aforementioned benefits.
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2023 International Conference on Advances in Electronics, Control and Communication Systems (ICAECCS)
in Microgrid (MG) systems, the output voltage controller within the primary control, called the “... more in Microgrid (MG) systems, the output voltage controller within the primary control, called the “inner control is essential for regulating the output of the inverters and guaranteeing a high-stability operation. This paper addresses the modeling and design of the primary control’s inner loops intended for voltage-controlled three-phase LC-filtered inverters forming an islanded MG. The designed inner controller is a dual-loop control structure, consisting of outer voltage and inner current control loops, implemented in the dqθ−frame. Each control loop includes three PI controllers for the direct, quadrature, and DC (zero) components regulation. The modeling of the voltage-controlled LC-filtered inverter, as well as the voltage/current inner control loops in the dqθ−frame, is provided. The tuning of the controllers’ parameters is done with the help of a developed straightforward and efficient design approach. Simulations are carried out in MATLAB/SimPowerSystem environment. The findings reveal that the designed inner controller for output voltage tracking is effective, with high performance in both steady and transient states, under a variety of operating conditions.
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2021 Fourth International Conference on Electrical, Computer and Communication Technologies (ICECCT), 2021
This paper aims to analyze the influence of setting different perturbation step-size and frequenc... more This paper aims to analyze the influence of setting different perturbation step-size and frequency in Perturb and Observe (P&O) Maximum Power Point Tracking (MPPT) algorithm for photovoltaic (PV) systems. P&O algorithm is commonly used in commercial PV converters due to easy implementation, low computational burden and low cost. However, P&O MPPT algorithm suffers high steady-state oscillation around the maximum power point (MPP) and tracking confusion during rapid change in irradiance. This results in a considerable high energy loss and low tracking efficiency. Thus, this paper presents an improved method on how to determine a suitable perturbation step-size and frequency for P&O algorithm under dynamic weather conditions. Both static and dynamic MPPT efficiency were tested according to the European Standard 50530 (EN50530). A dc-dc single-ended primary inductor converter (SEPIC) is employed as an intermediate stage between the PV generator and the load. The tracking performance in terms of convergence speed toward MPP and the amplitude of oscillation around the MPP is investigated to observe the effect of different perturbation step-size and frequency.
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2018 International Conference on Communications and Electrical Engineering (ICCEE), 2018
This paper introduces an effective design and control of a two-stage standalone photovoltaic syst... more This paper introduces an effective design and control of a two-stage standalone photovoltaic system consisting of a DC-DC boost converter as the first stage and a single-phase full H-bridge inverter as the second stage. The DC-DC converter controlled by Perturb and Observe MPPT to achieve maximum electric power under different weather conditions. Moreover, the full H-bridge inverter topology along with two control loops are used as a link between the system and the load. To mitigate noises that could occur in both voltage and current, a second order passive Inductor Capacitor(LC) filter is conceived. Implementation of the system is done by Matlab/Simulink Software and relevant results are discussed.
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Energy, 2017
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Applied Energy, 2017
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2015 International Conference on Renewable Energy Research and Applications (ICRERA), 2015
in this paper, a MATLAB-Simscape-based model for the simulation of a Photovoltaic (PV) generator ... more in this paper, a MATLAB-Simscape-based model for the simulation of a Photovoltaic (PV) generator is presented and discussed. The MPPT techniques based on Fuzzy Logic Control (FLC) are simple to be developed and can provide high efficiency in the control of the PV systems. For this purpose a detailed analysis and a comparative study have been provided for two fuzzy logic MPPT methods recently published. The first is based on a modified hill climbing-FLC and the second one is based on adaptive P&O-FLC. Moreover, The conventional P&O has been developed. The developed techniques have been simulated in the MATLAB-Simulink environment to show the method for which the performances of PV system are increased. The results obtained, revealed the performance of the adaptive P&O-FLC MPPT over the remaining examined methods with negligible static error, fast time response and high efficiency under fast variation of irradiance level.
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Energy Conversion and Management, 2016
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International Conference on Communications and Electrical Engineering (ICCEE), 2018
This paper introduces an effective design and control of a two-stage standalone photovoltaic syst... more This paper introduces an effective design and control of a two-stage standalone photovoltaic system consisting of a DC-DC boost converter as the first stage and a single-phase full H-bridge inverter as the second stage. The DC-DC converter controlled by Perturb and Observe MPPT to achieve maximum electric power under different weather conditions. Moreover, the full H-bridge inverter topology along with two control loops are used as a link between the system and the load. To mitigate noises that could occur in both voltage and current, a second order passive Inductor Capacitor(LC) filter is conceived. Implementation of the system is done by Matlab/Simulink Software and relevant results are discussed.
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International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS), 2019
Tested by the manufacturer, the electrical characteristics of PV modules are rated at the Standar... more Tested by the manufacturer, the electrical characteristics of PV modules are rated at the Standard Test Conditions (STC; 1000 W/m 2 and 25 °C). But under real working conditions where the temperature and the irradiance are different from those of STC, the electrical specifications are definitely affected. Which in turn, affect the conversion efficiency and the Fill factor (FF). Here, the conversion efficiency and the FF of three different PV modules technologies: Poly-Crystalline Silicon (Poly C-Si), Copper Indium Gallium Selenide (CIGS) and Cadmium Telluride (CdTe) under STC and real working conditions of solar irradiance and temperature are evaluated based on real data, then analyzed. To this, a test facility is employed to carry out the required tests for the aforementioned PV technologies. The investigation presented in this paper aims to seek which PV technology is preferable in a specific level of irradiance and temperature.
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The First International Conference on Materials, Energy and Environment (MEE’2020), 2020
A Two-stage single-phase photovoltaic islanded micro-grid is investigated within this paper. The ... more A Two-stage single-phase photovoltaic islanded micro-grid is investigated within this paper. The used DC-DC boost converter, which steps up the Photovoltaic generator output voltage, is controlled by applying an improved fuzzy-based Maximum Power Point Tracking (MPPT) technique. A bidirectional DC-DC converter is incorporated between the battery storage and DCinverter side to manage the power flow, through an outer PI voltage control and a fuzzy inner current control. The H-bridge inverter is used to supply AC loads. This latter is controlled via a fuzzy-PWM regulator to get sinusoidal voltage and current. The control is fulfilled by investigating the proposed management strategy. The whole system is implemented and tested in MATLAB/Simulink platform under illumination changes. The results obtained clearly show an increase in power quality, fast response time, and better performance of the proposed structure.
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1st International Conference on Communications, Control Systems and Signal Processing (CCSSP), 2020
This paper proposes a Management Algorithm (MA) for a hybrid PV/battery stand-alone system. The m... more This paper proposes a Management Algorithm (MA) for a hybrid PV/battery stand-alone system. The main purpose is to ensure the ongoing availability of energy for supplying the load. Meanwhile, guarantee a maximum of stability during perturbations of production and Partial Shading (PS) conditions. The interfaced power electronic converters for the Photovoltaic Generator (PVG) and battery are controlled separately. To harvest the maximum power from the PVG and control the boost converter, a Hill Climbing-Particle Swarm Optimization (HC-PSO) is used. A double PI control loop is designed to manage the bidirectional buck-boost converter interfacing the battery storage to the load side. The aim of this latter is to maintain the delivered power to the load under varying weather conditions. Simulations are performed using MATLAB/ Simulink. Then, three cases are considered to be analyzed for assessing the consistency of the MA: (1) under standard conditions when the rated power is sufficient to charge the battery and supply the load; (2) under fast varying irradiance conditions and (3) under PS. The results confirm the reliability and effectiveness of the proposed MA in controlling stand-alone PV systems.
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Fourth International Conference on Electrical, Computer and Communication Technologies (ICECCT), 2021
This paper aims to analyze the influence of setting different perturbation step-size and frequenc... more This paper aims to analyze the influence of setting different perturbation step-size and frequency in Perturb and Observe (P&O) Maximum Power Point Tracking (MPPT) algorithm for photovoltaic (PV) systems. P&O algorithm is commonly used in commercial PV converters due to easy implementation, low computational burden and low cost. However, P&O MPPT algorithm suffers high steady-state oscillation around the maximum power point (MPP) and tracking confusion during rapid change in irradiance. This results in a considerable high energy loss and low tracking efficiency. Thus, this paper presents an improved method on how to determine a suitable perturbation step-size and frequency for P&O algorithm under dynamic weather conditions. Both static and dynamic MPPT efficiency were tested according to the European Standard 50530 (EN50530). A dc-dc single-ended primary inductor converter (SEPIC) is employed as an intermediate stage between the PV generator and the load. The tracking performance in terms of convergence speed toward MPP and the amplitude of oscillation around the MPP is investigated to observe the effect of different perturbation step-size and frequency.
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International Conference on Advances in Electronics, Control and Communication Systems (ICAECCS), 2023
in Microgrid (MG) systems, the output voltage controller within the primary control, called the "... more in Microgrid (MG) systems, the output voltage controller within the primary control, called the "inner control", is essential for regulating the output of the inverters and guaranteeing a high-stability operation. This paper addresses the modeling and design of the primary control's inner loops intended for voltage-controlled three-phase LC-filtered inverters forming an islanded MG. The designed inner controller is a dual-loop control structure, consisting of outer voltage and inner current control loops, implemented in the dq0-frame. Each control loop includes three PI controllers for the direct, quadrature, and DC (zero) components regulation. The modeling of the voltagecontrolled LC-filtered inverter, as well as the voltage/current inner control loops in the dq0-frame, is provided. The tuning of the controllers' parameters is done with the help of a developed straightforward and efficient design approach. Simulations are carried out in MATLAB/SimPowerSystem environment. The findings reveal that the designed inner controller for output voltage tracking is effective, with high performance in both steady and transient states, under a variety of operating conditions.
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Elsevier Ltd. Energy, 2017
This paper presents different Maximum Power Point Tracking (MPPT) methods belonging to different ... more This paper presents different Maximum Power Point Tracking (MPPT) methods belonging to different classes as well as two overviews. The first was about the procedures used in the test and evaluation of MPPTs. The second is an overview of Fuzzy Logic Controller (FLC) MPPTs and improved MPPTs. Conventional MPPTs such as Perturb and Observe (P&O), Hill Climbing (HC) and Incremental Conductance (InCond); Improved MPPTs (are the modified versions of conventional MPPTs) such as Improved Incremental Conductance (Improved-InCond) and intelligent MPPTs such as FLC have been implemented and tested under two different levels of irradiance and temperature. A detailed description about the hardware and software implementation platforms (designed and built in our laboratory) is provided. Based on measured data, the MPPTs under consideration have been evaluated and compared in terms of different criteria, showing the advantages and disadvantages of each one. The comparison results showed that Improved-InCond gives a fast convergence to the MPP(Maximum Power Point). Whereas, FLC is able to adapt to the variation of irradiance and temperature levels. Thereby, a good performance is obtained wherein the MPP is reached in a short time as well as the power ripples are very small.
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Elsevier Ltd. Applied Energy, 2017
h i g h l i g h t s A new MPPT method for PV systems under non-uniform irradiance conditions is p... more h i g h l i g h t s A new MPPT method for PV systems under non-uniform irradiance conditions is proposed. The proposed MPPT is composed of a novel identifying-loop and a tracking loop. Comparison with three classical MPPTs as well as six global MPPTs is carried out. High capability to extract the GMPP under non-uniform irradiance conditions. Fast convergence and low complexity are the main advantages of the proposed MPPT.
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International Journal of Power Electronics and Drive System , 2020
Maximum Power Point Tracking (MPPT) techniques are developed to harvest and supply maximum power ... more Maximum Power Point Tracking (MPPT) techniques are developed to harvest and supply maximum power to the load. This depends on the power generated and the MPPT accuracy. Under quick-changing weather conditions, Incremental Conductance (InCond) and numerous different algorithms may fail to track the exact Maximum Power Point (MPP) which may result in significant power loss. Fuzzy Logic (FL) based MPPT is quick and accurate in tracking the MPP, but the high complexity and the implementation difficulty are their main disadvantages. A novel FL-InCond MPPT improved technique is developed based on the features of InCond and FL techniques to overcome their drawbacks. The newly developed approach can automatically adjust the variation of the duty cycle for tracking the MPP with accuracy. The obtained results are compared with conventional Perturb and observe (P&O) and InCond MPPTs for grid-connected mode under fast weather conditions. It is demonstrated that the developed method outperforms the aforementioned MPPT techniques in terms of tracking response, efficiency and the delivered current quality.
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American Society of Mechanical Engineers, 2023
The essential aim of this study is to estimate the daily utilizability and useful energy of a fla... more The essential aim of this study is to estimate the daily utilizability and useful energy of a flatplate solar collector in Algeria for different climatic zones. For this purpose, a program based on Klein's method was developed to estimate the daily utilizability and the useful energy characterized by the optical efficiency and the global loss coefficient that are equal to 0.72 and 7.9 W/m 2 K, respectively. The seasonal potentials of the whole studied zones are represented by geographical maps; then, a parametric study is performed to see the influence of the inlet temperature of the heat transfer fluid, the optical efficiency, and the global coefficient losses on the average utilizability per month for each site. Subsequently, the utilizability variations considering different sites and during various months are analyzed in terms of the average temperature of the heat transfer fluid, the optical efficiency, and the coefficient of global losses. The results show that the usable potential produced by this type of solar collector is 1500-1700 MJ/m 2 in climatic zones E5 (Tanegrouft), E4 (Sahara), and E3 (Pre-Sahara) and is 1300 MJ/m 2 in climatic zones E2 (Highlands) and E1 (Coastal) during the summer season. While for the winter season, the usable potential is 500-700 MJ/m 2 in climatic zones E1 and E2, and 700-900 MJ/m 2 in E3, E4, and E5, which can be considered the most favorable zones for the conversion of the available solar energy into thermal one through the flat-plate solar collector. The study of the effect on the system performance considering usability has shown that the effects of the overall loss coefficient are more significant compared to optical efficiency.
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IET Generation, Transmission & Distribution, 2024
In voltage-controlled voltage source inverters (VSIs)-based microgrids (MGs), the inner control i... more In voltage-controlled voltage source inverters (VSIs)-based microgrids (MGs), the inner control is of prime interest task for guaranteeing safe and stable operation. In this paper, an in-depth investigation of the modelling, control design, and analysis of the voltage and current inner control loops intended for single-phase voltage-controlled VSIs is established. The main objective of this work is to provide a comprehensive study of the mathematical modelling, control design, and performance evaluation of the inner control's loops considering different proportional-integral (PI) controller types with and without compensation, and to determine the optimal scheme that can offer better performance in terms of implementation simplicity, robustness, and transient and steady-state responses. Thus, the mathematical closed-loop models of designed outer voltage and inner current control schemes based on PI, P, and feedforward controllers with and without compensation are, first, derived. Following this, a systematic and effective control design for tuning the different PI controllers' parameters is proposed. Furthermore, an analysis revealing the performance of the designed voltage and current control schemes is provided. This analysis enables us to choose a P controller and PI feedforward controller for the current control loop and the voltage control loop, respectively. The chosen P and PI controllers should be simple; meanwhile, they should offer a wide bandwidth. A simulation study is carried out in MATLAB/Simulink software to assess the performance of the adopted inner control scheme for both linear and non-linear loads. In addition, an experimental setup, based on a TMS320F2837xD μC, of a single-phase VSI supplying linear and non-linear loads is built to verify the effectiveness and the robustness of the adopted inner controller. The results demonstrated: (1) the necessity of introducing the compensation term, which is responsible for offering control improvement against voltage perturbation, (2) the high tracking performance of the chosen controller in terms of dynamic and steady-state responses as well as its simplicity of implementation.
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in Microgrid (MG) systems, the output voltage controller within the primary control, called the "... more in Microgrid (MG) systems, the output voltage controller within the primary control, called the "inner control", is essential for regulating the output of the inverters and guaranteeing a high-stability operation. This paper addresses the modeling and design of the primary control's inner loops intended for voltage-controlled three-phase LC-filtered inverters forming an islanded MG. The designed inner controller is a dual-loop control structure, consisting of outer voltage and inner current control loops, implemented in the dq0-frame. Each control loop includes three PI controllers for the direct, quadrature, and DC (zero) components regulation. The modeling of the voltagecontrolled LC-filtered inverter, as well as the voltage/current inner control loops in the dq0-frame, is provided. The tuning of the controllers' parameters is done with the help of a developed straightforward and efficient design approach. Simulations are carried out in MATLAB/SimPowerSystem environment. The findings reveal that the designed inner controller for output voltage tracking is effective, with high performance in both steady and transient states, under a variety of operating conditions.
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This paper investigates the use of a new global optimization algorithm that is based on Taguchi m... more This paper investigates the use of a new global optimization algorithm that is based on Taguchi method to determine the performance parameters of selfexcited induction generator being driven by variable speed wind. This analysis is based on solving equations obtained from the per-phase equivalent circuit of the induction generator. The equations have two unknowns namely the frequency and the magnetizing reactance. Both unknown are strongly dependent on the wind turbine speed, the capacity of the excitation, the load being connected at the terminals of the stator and eventually the per-phase equivalent circuit parameters. The resulting equations are nonlinear and subsequently to solve them one can employ either gradient-based algorithms or heuristic algorithms. This paper uses a new heuristic algorithm based on the Taguchi method which, in addition to its global research capability, offers superior characteristics in terms of accuracy and ease of implementation. A comparison with recently published optimization methods is carried out to show its performances in terms of accuracy and ease of implementation. The MATLAB software will be used to perform this analysis on a machine of 0.75 kW while some will be validated experimentally to confirm the aforementioned benefits.
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2023 International Conference on Advances in Electronics, Control and Communication Systems (ICAECCS)
in Microgrid (MG) systems, the output voltage controller within the primary control, called the “... more in Microgrid (MG) systems, the output voltage controller within the primary control, called the “inner control is essential for regulating the output of the inverters and guaranteeing a high-stability operation. This paper addresses the modeling and design of the primary control’s inner loops intended for voltage-controlled three-phase LC-filtered inverters forming an islanded MG. The designed inner controller is a dual-loop control structure, consisting of outer voltage and inner current control loops, implemented in the dqθ−frame. Each control loop includes three PI controllers for the direct, quadrature, and DC (zero) components regulation. The modeling of the voltage-controlled LC-filtered inverter, as well as the voltage/current inner control loops in the dqθ−frame, is provided. The tuning of the controllers’ parameters is done with the help of a developed straightforward and efficient design approach. Simulations are carried out in MATLAB/SimPowerSystem environment. The findings reveal that the designed inner controller for output voltage tracking is effective, with high performance in both steady and transient states, under a variety of operating conditions.
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2021 Fourth International Conference on Electrical, Computer and Communication Technologies (ICECCT), 2021
This paper aims to analyze the influence of setting different perturbation step-size and frequenc... more This paper aims to analyze the influence of setting different perturbation step-size and frequency in Perturb and Observe (P&O) Maximum Power Point Tracking (MPPT) algorithm for photovoltaic (PV) systems. P&O algorithm is commonly used in commercial PV converters due to easy implementation, low computational burden and low cost. However, P&O MPPT algorithm suffers high steady-state oscillation around the maximum power point (MPP) and tracking confusion during rapid change in irradiance. This results in a considerable high energy loss and low tracking efficiency. Thus, this paper presents an improved method on how to determine a suitable perturbation step-size and frequency for P&O algorithm under dynamic weather conditions. Both static and dynamic MPPT efficiency were tested according to the European Standard 50530 (EN50530). A dc-dc single-ended primary inductor converter (SEPIC) is employed as an intermediate stage between the PV generator and the load. The tracking performance in terms of convergence speed toward MPP and the amplitude of oscillation around the MPP is investigated to observe the effect of different perturbation step-size and frequency.
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2018 International Conference on Communications and Electrical Engineering (ICCEE), 2018
This paper introduces an effective design and control of a two-stage standalone photovoltaic syst... more This paper introduces an effective design and control of a two-stage standalone photovoltaic system consisting of a DC-DC boost converter as the first stage and a single-phase full H-bridge inverter as the second stage. The DC-DC converter controlled by Perturb and Observe MPPT to achieve maximum electric power under different weather conditions. Moreover, the full H-bridge inverter topology along with two control loops are used as a link between the system and the load. To mitigate noises that could occur in both voltage and current, a second order passive Inductor Capacitor(LC) filter is conceived. Implementation of the system is done by Matlab/Simulink Software and relevant results are discussed.
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Energy, 2017
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Applied Energy, 2017
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2015 International Conference on Renewable Energy Research and Applications (ICRERA), 2015
in this paper, a MATLAB-Simscape-based model for the simulation of a Photovoltaic (PV) generator ... more in this paper, a MATLAB-Simscape-based model for the simulation of a Photovoltaic (PV) generator is presented and discussed. The MPPT techniques based on Fuzzy Logic Control (FLC) are simple to be developed and can provide high efficiency in the control of the PV systems. For this purpose a detailed analysis and a comparative study have been provided for two fuzzy logic MPPT methods recently published. The first is based on a modified hill climbing-FLC and the second one is based on adaptive P&O-FLC. Moreover, The conventional P&O has been developed. The developed techniques have been simulated in the MATLAB-Simulink environment to show the method for which the performances of PV system are increased. The results obtained, revealed the performance of the adaptive P&O-FLC MPPT over the remaining examined methods with negligible static error, fast time response and high efficiency under fast variation of irradiance level.
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Energy Conversion and Management, 2016
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Power Systems. Springer, Singapore. , 2019
Many local and global fuzzy logic based MPPT methods have been proposed to seek the solar Photovo... more Many local and global fuzzy logic based MPPT methods have been proposed to seek the solar Photovoltaic (PV) system's MPP. In this chapter, various improved FL-MPPTs which have been proposed over the years are introduced, their advantages and disadvantages are also clarified. Local MPPTs (LMPPTs) based on improved versions of FL are presented in detail, including Modified Hill Climbing-FL Controller (HC-FLC) and Adaptive P&O-FLC. Then, based on simulation and experimental results, a comparative study is done by employing the main assessment criteria to figure out the relative merits and limitations of those MPPTs in tracking the maximum power. The last part of the chapter introduces advanced Global MPPT techniques based on FL to track the GMPP of complicated shading patterns. A performance comparison of those GMPPTs is done and useful information on how to choose a suitable MPPT depending on the application intended, are outlined.
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Springer Nature Switzerland , 2020
In this chapter, three different commercialized photovoltaic (PV) technologies-polycrystalline si... more In this chapter, three different commercialized photovoltaic (PV) technologies-polycrystalline silicon (poly C-Si), copper indium gallium selenide (CIGS) and cadmium telluride (CdTe)-are investigated in terms of several aspects. A PV model based on manufacture's datasheet has been presented. Its originality consists in the using of a simple procedure which takes only the datasheet parameters into account to identify the series resistance (Rs) of solar cells. Moreover, the ideality factor (n) value is adapted to fit the solar cell technology. Both the identified Rs and n values have been used within the solar cell block provided by MATLAB Simscape toolbox to model different PV modules having different technologies, as well as to predict their characteristics (current-voltage (I-V) and Power-Voltage (P-V)). A test facility is employed to carry out the required tests for assessing the PV model. Obtained experimental results under different climate conditions are compared with simulated ones. The comparison is carried out by evaluating four statistical errors with a view of measuring the accuracy of the proposed model in predicting the I-V and P-V characteristics.
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