Modelling and Predicting of the Characteristics of a Photovoltaic Generator on a Horizontal and Tilted Surface

In the present paper, we will attempt to predict the Ipv-Vpv output characteristic of a photovoltaic generator (PVG) and consequently the generated electric power. This will be possible through modeling, extracting the electrical parameters of the PVG under study and also, by estimating the global incident solar radiation, on a surface, first horizontally, and then tilted to a given angle. Mathematical models developed in Matlab, to characterize the studied PVG are validated by experimental data of the PVG manufacture. While models associated with global radiation are validated by measurements taken by the meteorological station installed on the laboratory site ERTAIER (Team for Research in Technology and Advanced Engineering of Renewable Energies) of Higher School of Technology Agadir (ESTA).

Evaluation of the Energy Performance of the Amougdoul Wind Farm, Morocco

This paper is concerned with the assessment of the the performance of the Amougdoul wind farm. We have determined the Weibull parameters; namely the scale parameter, c (m/s) and shape parameter, k. After that, we have estimated energy output by a wind turbine using two techniques: the useful power calculation method and the method based on the modeling of the power curve, which is respectively 134.5 kW and 194.19 KW corresponding to 27% and 39% of the available wind energy, which confirm that the conversion efficiency does not exceed 40%

Benchmarking study between capacitive and electronic load technic to track I-V and P-V of a solar panel

To detect defects of solar panel and understand the effect of external parameters such as fluctuations in illumination, temperature, and the effect of a type of dust on a photovoltaic (PV) panel, it is essential to plot the Ipv=f(Vpv) characteristic of the PV panel, and the simplest way to plot this I-V characteristic is to use a variable resistor. This paper presents a study of comparison and combination between two methods: capacitive and electronic loading to track I-V characteristic. The comparison was performed in terms of accuracy, response time and instrumentation cost used in each circuit, under standard temperature and illumination conditions by using polycrystalline solar panel type SX330J and monocrystalline solar panels type ET-M53630. The whole system is based on simple components, less expensive and especially widely used in laboratories. The results will be between the datasheet of the manufacturer with the experimental data, refinements and improvements concerning the number of points and the trace time have been made by combining these two methods

Utilization of MOSFET Transistor to Characterize PV Panels under Dust: Study Area Agadir-Morocco

The accumulation of dust on the surface of photovoltaic (PV) modules reduces the intensity of the light transmitted through the cover glass, and therefore, the amount of energy generated by the solar cells. This issue, known as soiling. Affects PV systems worldwide, causing power losses as high as 70% in the worst scenarios This chapter presents an electro-optical investigation of the dust accumulated on the PV panel in the study area of Agadir-Morocco, by using a MOSFET transistor as load to truck the IV and PV characteristics of SX330J. For this purpose, Experiments of soiling effects on the performances of a PV panel have been performed using dust collected from two sites in the region of Agadir, Morocco: Adrar (AD) and Halieutic-Parc (HP). The results suggest that measuring the optical transmittance of the soiling accumulated on a PV glass can give enough information to quantify the impact of soiling on the energy production

Analyses quantitatives par SEM/EBIC des defauts recombinants dans les semiconducteurs polycristallins : influence des traitements thermiques sur l'activite electrique des bicristaux de silicium

SIGLECNRS T Bordereau / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Benchmarking of the Conductance Increment Method and its improved versions

To increase the performance of a photovoltaic (PV) system, a circuit using MPPT (Maximum Power Point Tracking) technology must be used. There are several algorithms proposed in the literature and they need to be compared to select the best performing MPPT technology for a specific application or to make recommendations for future MPPT research. This article presents a benchmarking the most widely used MPPT algorithms, namely the “INC_C” (Classical Incremental Conductance), the “INC_AM” (Modified Adaptive Incremental Conductance). The comparative study presented in this work will confirm that “INC_AM≫ is the best MPPT technique to improve the efficiency of a PV system

MPPT of PV System Under Partial Shading Conditions Based on Bio-inspired Swarm Intelligence Technique

To respond to the increase in demand for electricity, the use of photovoltaics is growing considerably as it produces electrical energy without polluting the environment. In addition, to enhance the efficiency of photovoltaic modules, an MPPT algorithm is required to follow the maximum voltage and maximum current in the IV curve. This technique can be achieved by using a DC-DC converter. For this purpose, various MPPT techniques have been developed. The combination of MPPT and DC-DC converter is implemented using Matlab/Simulink and connected to a modelled PV module to validate the simulation

In Situ Low-Temperature Chemical Bath Deposition of CdS Thin Films without Thickness Limitation: Structural and Optical Properties

In this work, thin CdS films have been deposited using the chemical bath deposition technique (CBD). Different synthesis parameters, such as number of runs, deposition time, and postannealing temperature, are studied and optimized in order to avoid the supersaturation phenomenon and to achieve a low-temperature growth. CdS thin films, of cubic structure, oriented along the (111) direction with homogenous and smooth surface, have been deposited by using the CBD growth process without any annealing treatment. Based on a set of experimental observations, we show that the solution saturation phenomenon can be avoided if the deposition is performed in several runs at a short deposition time. Throughout the CBD technique, it is then possible not only to overcome any film thickness limitation but also to grow the CdS films in a single technological step at a low temperature and without any postdeposition annealing treatment. CdS films with excellent structural quality and a controllable thickness are obtained when the deposition bath temperature is fixed at 65°C. In addition, deposited films exhibit an optical transmittance ranging from 70 to 95% depending on the synthesis parameters, with band gap energy around 2.42 eV. The process developed in this work might be useful for depositing CdS films on flexible substrates

Implementation in Arduino of MPPT Using Variable Step Size P&O Algorithm in PV Installations

In order to maximize the electric energy production of a photovoltaic generator (PVG), the maximum power point tracking (MPPT) methods are usually used in photovoltaic systems. The principle of these techniques is to operate the PVG to the maximum power point (MPP), which depends on the environmental factors, such as solar irradiance and ambient temperature, ensuring the optimal power transfer between PVG and load. In this paper, we present the implementation of two digital MPPT commands using the Arduino Mega type. The two proposed MPPT controls are based on the algorithm of perturb and observe (P&O), the first one with fixed perturbation step and the second one with two perturbations step varying with some conditions. The experimental results show that the P&O algorithm with variable step perturbation gives good results compared to the P&O algorithm with fixed perturbation step in terms of the time response and the oscillations around the MPP

Magnetic field effect on electrodeposition of CoFe2O4 nanowires

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