Mohammadi Benhmida

• Chouaib Doukkali University

The characterization of photovoltaic generators with acceptable accuracy require the use of suitable experimental devices and appropriate methods. In this study, the used I-V curve tracer (Amiry et al. 2018) [1] allows to collect a current- voltage characteristic of a hundred (I, V) points under real operating conditions. Each (I, V) point is takin...

This paper presents a statistical comparative study of eight important parametric broadband clear sky models, against Meteosat-derived data, to estimate solar hourly direct normal irradiance (DNI) for four Moroccan arid zone sites. To achieve this aim, four sites well spread across this climatic zone were selected, and four references days were cho...

In this paper, a converter DC/DC for power applications is developed: battery charger for photovoltaic system, vehicle charger, helicopter power supply. It consists of using a Full-Bridge DC/DC converter which is controlled by a new analog control, designed and analyzed during this work. This control has been dimensioned so that it ensures a smooth...

The open-air solar drying is a traditional method used for drying Gelidium sesquipedale in Morocco, an important commercial maritime specie of red algae existing in abundant quantities in the large Moroccan coast between Safi and EL jadida. However, this method is not professional and is time-consuming. Here, we present a modified design of a solar...

Nowadays, the investments in large-scale photovoltaic power projects is increasing around the world and more especially in the MENA region. To encourage investors to install more PV capacities, it's important to provide guaranties on the benefits in term of production especially in harsh and semi-arid climates. For this reason, modeling of photovol...

At the early stage of photovoltaic plants feasibility study, the assessment of the power production and the technology performances is a necessity. To do so, engineers usually use software's and prediction models. Plenty of models are available in the literature, nevertheless, the selection of the most suitable one to be use in a specific climate i...

A model for the operating temperature of crystalline silicon photovoltaic (PV) module is proposed. The model represents the outdoor operating temperature of a PV module as a function of ambient temperature, in-plane irradiance, wind speed and a number of coefficients determined from in-situ module temperature and power output measurements. The mode...

This paper aims to give a critical overview of the existing prediction models for PV modules performance over a long term. Indeed, each model takes into account a number of meteorological parameters (cell temperature, ambient temperature, solar radiation and solar spectrum), and depends on regressive coefficients to weight each term of the equation...

This paper presents nonlinear backstepping control for Wind Power Generation System (WPGS) based Permanent Magnet Synchronous Generator (PMSG) and connected to utility grid. The block diagram of the WPGS with PMSG and the grid side back-to-back converter is established with the dq frame of axes. This control scheme emphasises the regulation of the...

Increasing solar cells efficiency is considered as a critical factor in reducing the production costs of photovoltaic cell manufacturers. Modeling, simulation and design are key tools achievement of high-efficiency solar photovoltaic cell. The efficiency is closely connected to the physical parameters associated with the solar cell model adopted. T...

This study presents a control scheme of the electronic interface of a grid connected Variable Speed Wind Energy Generation System (VS-WEGS) based on a Permanent Magnet Synchronous Generator (PMSG). The proposed system consists of wind turbines (WT) and 2 PMSGs connected to the electric network by back-to-back Voltage Source Converter (VSC) with a c...

The performances of an exposed to a light source photovoltaic solar panel decrease when its temperature increases. In this work, we present a cooling device constituted by a copper serpentine, a pump with an adjustable flow rate and a metallic plate exposed to solar irradiations. This system is intended to study experimentally the coolant flow effe...

In this work, we study the influence of various technological factors on silicon solar cells efficiency. We use simulation by personal computer one dimension software package (PC1D) solving equations describing the transport of electrons and holes in devices based on semiconductor materials. We highlight the most critical steps and the technologica...

In this paper, we propose and apply a new technique for extracting physical parameters of solar cell double exponential model with two ideality factor constants (DECM) from illuminated current-voltage (I-V) experimental characteristics. The equivalent circuit of solar cell includes two constant diodes ideality factors (n1 = 1, n2 = 2) with two satu...

Dans ce travail nous présentons les résultats de l’étude de l’influence de différents facteurs technologiques sur le rendement d’une cellule solaire à base de silicium. A cet effet, nous avons utilisé un logiciel de simulation [1], permettant de résoudre les équations décrivant le transport des électrons et des trous [2] dans les dispositifs à base...

This paper presents a new analytical method to extract the electrical parameters of junctions by replacing the simple exponential forward current with an equivalent polynomial model. Analytical expressions for the diode parameters (?, Io, Rs and Rsh) are derived and compared with the polynomial coefficients of degree n=4. The method is applied with...

In this paper, we present a new method for extracting physical parameters of the illuminated solar cell model. The equivalent circuit includes two diodes with two saturation currents I01, I02, a current generator Iph, a series resistance RS and a conductance GP [1-4 ]. One variable nonlinear equations being easier to manage in an optimization progr...

A new method is developed in this work, to extract electrical parameters using an analytical model for junction based on polymers Al/PPEEB wish is prepared in two steps. First, the thin layer of polymer PPEEB (derivative polyperlene diimide) is deposited by spin coating, then the aluminum contacts is deposited by vacuum thermal evaporation. Electri...

In this paper, we present a new method of extracting the model physical parameters of an illuminated solar cell, composed of series and shunt resistance. The method is based on analytical solution of the equation derived from the current-voltage (I-V) characteristics. The equation obtained is expressed in terms of I, V, and the derivative (dI/dV)....

In this work, we present three new Mathematica [1] codes written to extract physical parameters of illuminated solar cell from its current-voltage characteristic. The solar cell is modelled by a circuit containing a p-n junction photocurrent Iph, a reverse saturation current Is, an ideality factor n, a shunt resistance RSH and a series resistance R...

The spectral and temporal behavior of absorption bleaching due to band‐ and state‐filling processes in Cd 1-x Zn x Te polycrystalline layers with a nominal composition x=0.17 are investigated. The absorption bleaching due to band‐filling effects has a decay time in the range of 35 and 90 ps which depends on the photon energies of the pump and test...

In polycrystalline Cd 1-xZn xTe films on glass substrates prepared by vacuum evaporation pf presynthesized material an important absorption bleaching and self-diffraction have been observed at room temperature. The energy relaxation time T 1 (30 to 90 ps) is quite short and the coherence time T 2 up to 30 ps is extremely long. High optical nonlinea...

Bulk Cd0.13Zn0.87Te monocrystals are studied by nonlinear optical experiments at room temperature near their absorption edge. Time-resolved test and pump experiments allow us to determine separately the refractive index and absorption changes induced by the pump pulse by measuring the spatial intensity distribution of the test pulse.

We study the optical nonlinear properties of bulk Cd0.13Zn0.87Te monocrystals at room temperature near the band gap. In time‐resolved test and pump experiments, they manifest themselves by a defocalization and an induced absorption of the test beam in the presence of the pump beam. By measuring the spatial intensity profile of the test pulse transm...

Most of the physical properties of crystals which belong to the A2BX4 family, are closely connected with the growth method, and also with the thermal and mechanical treatments applied to the samples. It is the case for the dielectric response which shows a large thermal hystresis over a wide temperature range including the commensurate-incommensura...