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Influence of Both Magnetic Field and Temperature on Silicon Solar Cell Base Optimum Thickness Determination 预览
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作者 Nouh Mohamed Moctar Ould Mohamed Ousmane Sow +7 位作者 Sega Gueye Youssou Traore Ibrahima Diatta Amary Thiam Mamour Amadou Ba Richard Mane Ibrahima Ly Gregoire Sissoko 《现代物理(英文)》 2019年第13期1596-1605,共10页
The minority carrier’s recombination velocity at the junction and at the back surface is used for the modeling and determination of the optimum thickness of the base of a silicon solar cell in the static regime, unde... The minority carrier’s recombination velocity at the junction and at the back surface is used for the modeling and determination of the optimum thickness of the base of a silicon solar cell in the static regime, under magnetic field and temperature influence. This study takes into account the Umklapp process and the Lorentz effect on the minority carriers photogenerated in the base. 展开更多
关键词 Silicon Solar Cell Diffusion Coefficient Surface Recombination Velocity OPTIMUM BASE Thickness LORENTZ and Umklapp Processes
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Development of a Solar Controller with MLI Control 预览
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作者 Mamadou Wade Moussa Gueye +3 位作者 Ousmane Sow Daouda Sow Babou Dione Gregoire Sissoko 《电路与系统(英文)》 2018年第2期22-40,共19页
This work presents the development of a solar regulator which manages the charge and discharge of a (lead) battery installed in a photovoltaic system in order to extend its lifetime. The regulator is controlled by a m... This work presents the development of a solar regulator which manages the charge and discharge of a (lead) battery installed in a photovoltaic system in order to extend its lifetime. The regulator is controlled by a microcontroller (PIC16F877A) and protects the battery against overcharging, deep discharge, but also against temperature drifts. The operating principle is based on the control of a DC-DC converter by a rectangular signal MLI generated by the microcontroller. In addition to the protection function of the regulator, there is included a control and monitoring panel consisting of a visualization interface on which the system quantities can be observed. Thus, it will be given to the user to be able to act on the system. This display interface uses as a display an LCD screen and LEDs. Simulation results are presented to illustrate the operation of the proposed solar controller. 展开更多
关键词 Solar CONTROLLER Three-State CHARGE Algorithm Battery DC/DC CONVERTER MICROCONTROLLER Monitoring
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Junction Surface Recombination Concept as Applied to Silicon Solar Cell Maximum Power Point Determination Using Matlab/Simulink: Effect of Temperature 预览
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作者 Bakary Dit Dembo Sylla Ibrahima Ly +3 位作者 Ousmane Sow Babou Dione Youssou Traore Grégoire Sissoko 《现代物理(英文)》 2018年第2期172-188,共17页
In this work, we study the method for determining the maximum of the minority carrier recombination velocity at the junction Sfmax, corresponding to the maximum power delivered by the photovoltaic generator. For this,... In this work, we study the method for determining the maximum of the minority carrier recombination velocity at the junction Sfmax, corresponding to the maximum power delivered by the photovoltaic generator. For this, we study the temperature influence on the behavior of the front white biased solar cell in steady state. By solving the continuity equation of excess minority carrier in the base, we have established the expressions of the photocurrent density, the recombination velocity on the back side of the base Sb, and the photovoltage. The photocurrent density and the photovoltage are plotted as a function of Sf, called, minority carrier recombination velocity at the junction surface, for different temperature values. The illuminated I-V characteristic curves of the solar cell are then derived. To better characterize the solar cell, we study the electrical power delivered by the base of the solar cell to the external charge circuit as either junction surface recombination velocity or photovoltage dependent. From the output power versus junction surface recombination velocity Sf, we have deduced an eigenvalue equation depending on junction recombination velocity. This equation allows to obtain the maximum junction recombination velocity Sfmax corresponding to the maximum power delivered by the photovoltaic generator, throughout simulink model. Finally, we deduce the conversion efficiency of the solar cell. 展开更多
关键词 Silicon SOLAR Cell-Junction Surface Recombination Velocity-Maximum Power
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Study and Optimization of a Photovoltaic Mill System Functioning on the Course of the Sun 预览
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作者 Tafsir Abdoulaye Gaye Biram Dieng +2 位作者 Senghane Mbodji Ousmane Sow Grégoire Sissoko 《能源与动力工程(英文)》 2017年第4期260-272,共13页
This paper dealt with the optimization of the performance of a photovoltaic mill system operating on the sun race. Depending on the characteristics of the powered load which is a DC motor driving a grain mill and on t... This paper dealt with the optimization of the performance of a photovoltaic mill system operating on the sun race. Depending on the characteristics of the powered load which is a DC motor driving a grain mill and on the weather conditions (temperature and illumination), we noted a very big difference between the potential maximum power and that actually transferred to the load. In order to improve the overall efficiency of the system, we use an adaptation circuit consisting of a boost converter controlled by a numerical MPPT (Maximum Power Point Tracking) command. With the Perturb & Observe (P & O) algorithm, the MPPT control measure the photocurrent, the photo tension and the power released by the photovoltaic generator. From this result, the MPPT control adjusts the duty cyclic of the converter to bring the system to the optimum operating point. Hence, using MATLAB/Simulink software, we did the modeling and the simulation of the system which is composed by a PV generator, a boost converter, a Pulse Width Modulation and a DC motor. 展开更多
关键词 PV GENERATOR Boost CONVERTER PWM Signal MPPT Control PERTURBATION & Observation DC Motor MILL
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