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Wireless Sliding MPPT Control of Photovoltaic Systems in Distributed Generation Systems
摘要： The aim of a photovoltaic (PV) system’s control is the extraction of the maximum power even if the irradiance, the temperature, or the parameters vary. To do that, a maximum power point tracking (MPPT) algorithm is required. In this work, a sliding control is designed to regulate the PV modules’ output voltage and make the panel work at the maximum power voltage. This control is selected to improve the robustness, the transient dynamic response, and the time response of the system under changeable environmental conditions, adjusting the duty cycle of the DC/DC converter. The DC/DC converter connected to the PV module output is a buck-boost converter. This configuration presents the advantage of providing voltages lower or higher than supplied by the photovoltaic modules to provide the required voltage to the load (including the voltages ceded by telecommunication loads, amongst others). In addition, a remote sliding control is developed to make the global supervision of the PV system in distributed generation grids. The designed algorithm is tested in an experimental platform, both locally and remotely connected to the base station, to prove the effectiveness of the sliding control. Thus, the communication effect in the control is also analyzed.
关键词： maximum power point tracking (MPPT),sliding mode control,photovoltaic system,wireless communication
更新于2025-09-19 17:13:59
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Reduction of electrical power loss in a photovoltaic chain in conditions of partial shading
摘要： The paper presents the problem of losses of electrical power in photovoltaic chains during partial shading. Photovoltaic modules work best when the illumination is uniform over the entire light-sensitive surface. If a part of this surface is illuminated to a lesser extent, it often ceases to be a part of the electricity generator, but constitutes a resistance. To minimize this phenomenon, PV modules use bypass diodes, e.g. covering several dozen cells in a photovoltaic chain. In addition, parts of the photovoltaic module surface with lower exposure to sunlight may be additionally illuminated with a mirror positioned to reflect light. The analysis uses a photovoltaic chain model implemented in MATLAB/Simulink. The model describes the processes of electrical power generation in photovoltaic modules. The model corresponds to a laboratory photovoltaic system located in AGH in Cracow. In the presented model, each individual part may be illuminated with different light intensity. The light incident on the cells is a direct sunlight or light reflected from the mirror. The model allows for the analysis of the electrical power generated depending on the light profile of the photovoltaic system. The results of the model analysis may be applied in optimization of the PV modules’ configuration.
关键词： Partial shading,Modelling,Photovoltaic system,Sunlight reflection,Maximum power point tracking (MPPT)
更新于2025-09-19 17:13:59
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A novel MPPT technique to increase accuracy in photovoltaic systems under variable atmospheric conditions using Fuzzy Gain scheduling
摘要： Photovoltaic (PV) system has gradually become a research focus in the field of renewable energy power generation, and the output efficiency of PV system is the major concern of researchers. There are obvious non-linear characteristics in the output of PV system, and it will be greatly affected by the external environment. For achieving the maximum output power, PV system must operate under the guidance of maximum power point tracking (MPPT) methods. The tracking time and accuracy of these methods need to be improved. Therefore, this study contributes to increasing the output efficiency of PV system by improving the tracking time and accuracy with using Fuzzy Gain Scheduling of Proportional-Integral-Derivative (FGS-PID) regulator in the grid-connected mode. The suggested adaptive FGS-PID scheme is implemented using two-level control system architecture, combining the benefits of fuzzy logic as well as conventional PID regulator. Ziegler–Nichols tuning method is employed to select the initial values of PID gains. In the simulations of PV system under the varying irradiance and temperature, the tracking speed and tracking accuracy of FGS-PID (scaling factors) were higher than those of ANN, ANFIS, Fuzzy, INC, P&O, PID, and FGS-PID methods. In summary, FGS-PID (scaling factors) has better performance in tracking time and accuracy than other comparison algorithms. It can improve the output efficiency of PV system in practical application.
关键词： FLC based MPPT,Adaptive,DC-DC converter,PV system,Renewable energy
更新于2025-09-19 17:13:59
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[IEEE 2019 IEEE 8th International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP) - Le gosier, Guadeloupe (2019.12.15-2019.12.18)] 2019 IEEE 8th International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP) - Hyperspectral Super-Resolution: A Coupled Nonnegative Block-Term Tensor Decomposition Approach
摘要： This paper proposes a grid-tied photovoltaic (PV) system consisting of modular current-fed dual-active-bridge (CF-DAB) dc–dc converter with cascaded multilevel inverter. The proposed converter allows a small dc-link capacitor in the three-phase wye-connected PV system; therefore, the system reliability can be improved by replacing electrolytic capacitors with ?lm capacitors. The low-frequency ripple-free maximum power point tracking (MPPT) is also realized in the proposed converter. First of all, to minimize the in?uence resulting from reduced capacitance, a dc-link voltage synchronizing control is developed. Then, a detailed design of power mitigation control based on CF-DAB dynamic model is presented to prevent the large low-frequency voltage variation propagating from the dc-link to PV side. Finally, a novel variable step-size MPPT algorithm is proposed to ensure not only high MPPT ef?ciency, but also fast maximum power extraction under rapid irradiation change. A downscaled 5-kW PV converter module with a small dc-link capacitor was built in the laboratory with the proposed control and MPPT algorithm, and experimental results are given to validate the converter performance.
关键词： Current-fed dual-active-bridge (CF-DAB),low-frequency ripple,maximum power point tracking (MPPT),small dc-link capacitor,high-frequency link (HFL)
更新于2025-09-19 17:13:59
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Optimization of energy from photovoltaic cell using three port converter for home appliances
摘要： The main objective of this paper is to propose the significant usage of photovoltaic modules in household applications. This paper describes a compact but fully functional design by integrating basic converters to form a simplified single inductor converter structure while keeping minimum number of switches. The resultant converter is fully reconfigurable that all possible power flow combinations among the sources and load are achieved through different switching patterns. Single inductor converter module is used to simplify the structure while reducing the number of switches. This is fully configurable enabling all possible power flow combinations. The experimental behavior of this module from morning till evening is observed and the wave pattern of the subjective proposed results are recorded and verified.
关键词： PI Controller,Photovoltaic Cell,Zero Voltage Switching,MPPT Algorithm,Non-Isolated Three Port Converter
更新于2025-09-19 17:13:59
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[IEEE 2019 IEEE 7th International Conference on Smart Energy Grid Engineering (SEGE) - Oshawa, ON, Canada (2019.8.12-2019.8.14)] 2019 IEEE 7th International Conference on Smart Energy Grid Engineering (SEGE) - Nonlinear Control of a Boost DC/DC Converter for Photovoltaic MPPT Systems Using a TMS320F28379D Microcontroller
摘要： This work presents a nonlinear controller of a boost dc/dc power converter for photovoltaic (PV) maximum power point tracking (MPPT) systems. The scheme of the proposed controller consists of the design of a nonlinear controller for the duty cycle generation. For this purpose, a simple and low-cost voltage-oriented controller is proposed in this study. In fact, this control algorithm is suitable to efficiently track fast irradiance changes. Consequently, the efficiency of the overall MPPT system is improved by avoiding loss of PV power caused by i) oscillatory responses due to varying irradiance conditions and ii) load disturbances. In addition, by assuming passivity properties of the constitutive relationship of the load element, internal stability of the closed-loop system is guaranteed for different load conditions, which are applicable for most PV applications. Besides, the internal stability allows to consider load scenarios affected by bounded disturbances. Finally, the proposed MPPT control system is implemented by using a proportional-integral-derivative controller, thereby providing a low-cost solution, which is programmed in the TMS320F28379D DSC Board. Experimental results by considering several scenarios, i.e., i) irradiance changes, ii) changes of setpoint and iii) load disturbances are illustrated to validate the effectiveness of the proposal.
关键词： photovoltaic systems,MPPT,nonlinear control,boost converter
更新于2025-09-19 17:13:59
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An effective maximum power point tracker for partially shaded solar photovoltaic systems
摘要： The photovoltaic (PV) systems should operate at a maximum power point (MPP) to extract the maximum possible output power with high tracking efficiency under various operating conditions This paper discusses a new maximum power point tracking (MPPT) technique to extract the peak power from the PV panel/array during partial shaded conditions (PSCs). The proposed algorithm is based on bio-inspired Whale Optimization (WO) with reinitialization process when the PV system is subjected to change in shading pattern, and the algorithm tries to locate the global peak (GP) with a high convergence rate and high tracking efficiency. The proposed algorithm eliminates the computational burden faced by the hybrid MPPT algorithms as discussed in various literature and reduces the power oscillation during the change in operating conditions. The proposed technique is modeled and simulated under different test conditions using MATLAB/Simulink software. The performance of the proposed technique is compared with conventional perturb and observation (PO), Grey Wolf Optimization (GWO) and hybrid GWO (HGWO) techniques in terms of tracking time and tracking efficiency and the simulation result proves that WO technique displays high tracking efficiency (>95%) and less convergence time (<0.15sec) under PSCs with less power oscillations. Moreover, the performance assessment is carried out in terms of mismatching loss, fill factor, and relative power loss/gain.
关键词： Partial shading,Performance assessment,Global peak,WO,Convergence time,MPPT
更新于2025-09-19 17:13:59
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Implementation of a modified circuit reconfiguration strategy in high concentration photovoltaic modules under partial shading conditions
摘要： A modified circuit reconfiguration (MCR) technique for high concentration photovoltaic (HCPV) modules under partial shading conditions (PSCs) is proposed. Although HCPV modules have high conversion efficiency, they are sensitive to changing environments, especially PSCs. In response, the MCR strategy exploits the reconfigurable wiring of HCPV modules to implement the dynamic circuit reconfiguration (DCR) technique. In doing so, the hardware switches and complex control algorithms of the conventional DCR are simplified to reduce cost. Moreover, an irradiation estimation method is proposed for string current equalization using existing switches and connections. Two circuit-model prototypes, one square and one rectangular, were simulated to evaluate the proposed MCR strategy. Evaluation results demonstrate that the average output-power and conversion-efficiency improvements of the square and rectangular modules were around 31.07% and 5.00%, and 32.79% and 5.23%, respectively, when compared with the original Series connection topology. In addition, after reconfiguration by MCR, the module’s GMPP power was improved and the number of LMPPs reduced, which simplified the P-V curves. Furthermore, reliability tests demonstrated that with a small reconfiguration processing time ratio (0.06–0.28%), the daily energy harvested from the rectangular module was improved around 15%. The proposed MCR strategy has the advantages of reducing the hardware/software costs and lowering circuit losses. Additionally, the MCR method can increase the output power and efficiency of an HCPV module with high dispersion ability. The proposed method and prototypes can also be extended to larger scale arrays or implemented with other PV systems.
关键词： High concentration photovoltaic systems (HCPV),Maximum power point tracking (MPPT),Dynamic circuit reconfiguration,Partial shading conditions (PSCs)
更新于2025-09-16 10:30:52
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Detailed modeling of large scale photovoltaic power plants under partial shading conditions
摘要： As the popularity of solar panels increases, significant research is being performed on maximizing the power extracted from photovoltaic systems. A phenomenon known as partial shading is a major source of power losses for photovoltaic plants. One way to reduce the effects of partial shading conditions is by using bypass–diodes. Typically any number of series and parallel–connected photovoltaic cells, known as photovoltaic cell arrays, are connected in anti–parallel with bypass–diodes. Due to this, it is advantageous to have an equivalent model for a photovoltaic cell array that is connected to bypass–diodes. In order to accurately develop this model, it is necessary to consider both series and parallel configurations of bypass–diodes, as well as the thermal behavior of bypass–diodes. The bypass–diode’s temperature model must be comprised of the constantly changing dissipated power, the effects of wind speed and the ambient temperature. This paper constructs an electro–thermal modular model for any size photovoltaic system and includes the effects of both the photovoltaic cells and bypass–diodes. A detailed analysis of the proposed model is performed and is then validated in both PSCAD/EMTDC and Matlab–Simscape. The proposed model is then further validated by the use of real measurements of ambient temperature, cell temperature, wind speed and then finally by a performance analysis of several maximum–power–point–tracking algorithms.
关键词： MPPT,Modeling,Bypass–diode,Photovoltaic,Partial shading
更新于2025-09-16 10:30:52
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[IEEE 2019 4th International Conference on Power Electronics and their Applications (ICPEA) - Elazig, Turkey (2019.9.25-2019.9.27)] 2019 4th International Conference on Power Electronics and their Applications (ICPEA) - Implementation of Incremental Conductance Based MPPT Algorithm for Photovoltaic System
摘要： This paper deals with the hardware implementation of incremental conductance (IncCond) algorithm based maximum power point tracking (MPPT) for a photovoltaic (PV) system using Arduino board. The considered system consists of a DC-DC Boost converter, a PV panel and a resistive load. Firstly, simulation tests using Matlab/Siumilink are provided and then experimental validation is conduced based on an Arduino uno and spatial Simulink package known as ”support package for Arduino hardware”. The simulation and experimental tests show the satis?ed results of IncCond algorithm in terms of extraction of the maximum power point(MPP) form PV panel.
关键词： Arduino Board,DC–DC Boost converter,Incremental conductance,MPPT
更新于2025-09-16 10:30:52