The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this work the idea of graded band gap design in intrinsic-layer is simulated and studied numerically. We study our device model (p-GaN/ i-Ga1−xInxN /n-InN) by using AMPS-1D. The device performance is calculated by transport equations. Effect of series resistance is presented. It has been found that the use of the graded gap in intrinsic region can improve the performance of the GaN/InN solar cell.
This paper proposes an intelligent fault diagnosis technique to detect and classify possible faults occurring in Photovoltaic strings, based on the analysis of the symptoms observed in the I-V characteristic. The technique consists of two algorithms: The first one allows the classification of faults that have not the same symptoms evolution; whi le for the second one, two Artificial Neural Networks...
Copper indium gallium selenide (CIGS) solar cells are one of the most promising candidates for high efficiency thin-film solar cells. Recently, with the increase of system voltage of field array, the long term reliability became affected by the high potential bias. In this paper, we focus on the effect of potential induced degradation (PID) of CIGS photovoltaic modules, it consists of a climatic chamber...
Performance prediction issue is becoming more and more important for grid-connected Photovoltaic plants. This paper presents the performance prediction of a grid-connected photovoltaic plant using a hybrid technique; the used technique combines Seasonal Autoregressive Integrated Moving average (SARIMA) with Support Vector Machines (SVM). The employed data in this study are derived from a 20kWp grid-connected...
This paper proposes an adaptive multiclass neurofuzzy classifier (MC-NFC) for fault detection and classification in solar photovoltaic (PV) systems. The designed fuzzy classifier was optimized by seeking for the best numerical values of the parameters that tune its membership functions. The experiments have been conducted on the basis of collected data from a real time PV array emulator (namely array...
The performance of the photovoltaic panel is significantly affected by various environmental factors, due to these changes there is little chance to operate the PV module at its maximum power point when using Perturb and Observe (P&O) algorithm. Hence, an intelligent controller is designed employing ANFIS which draws much energy and fast response. The current work proposes an artificial-intelligence...
This paper present an optimal photovoltaic-hydrogen standalone power system using gray wolf optimizer technique. The system composed of photovoltaic generator and a hydrogen production system. Electrical power from solar conversion meets the user loads and the surplus used for water electrolysis to produce hydrogen. Control system is ensured via feed bucks control loops. MPP Tracking regulates with...
This paper has the focus to identify the unknown parameters of solar photovoltaic generators in real time, through the application of a new proposed technic. The identification process is discussed with details, about the four steps of identification. In this regard, the first step explain the experimental data acquisition work, to obtain data from real photovoltaic system. For the second step, a...
This paper deals with the development of intelligent power control and energy management of a photovoltaic-hydrogen hybrid system used in standalone application. Electrical power from solar conversion meets the user loads and the surplus used for water electrolysis to produce hydrogen. The system controlled by using an intelligent power conditioning units based on echo state network to ensure good...
The paper presents a new MPPT method based on Golden-Section Optimization (GSO) technique for photovoltaic systems. The GSO-based MPPT converges to the MPP by interval shrinking. Initially, two points have been selected from the search space that is known, evaluated then a new point is accordingly generated. At given iteration the algorithm has a new narrowed interval bounded by the new point and...
This paper describes a PV system supplying a large scale interconnected grid. A PV array is connected to AC grid via a DC-DC boost converter and a three-phase three-level Voltage Source Converter (VSC). Maximum Power Point Tracking (MPPT) is implemented in the boost converter by means of a Simulink model using sliding mode controller by switching the duty cycle of the boost converter. A three phase...
A robust sliding mode controller (SMC) for a grid-connected photovoltaic inverter is proposed in this paper. The objective of the control is to force both the output voltage of the PV source and the grid power factor at the inverter output to follow a certain trajectory reference. The robust sliding mode controller is applied directly to the nonlinear state model of the system composed by the PV source...
The objective of this work is to study and design a solar inverter, of a power of exit of environ 500 VA with a tension of entry of 12 VDC and an exit has purely sinusoidal wave of 230 VAC at a frequency of 50 Hz. The improvements made to the inverter are primarily at the level of the order, with first of all, the generation of a purely sinusoidal wave, but also the monitoring of the tension of entry...
This paper presents a methodology to perform the optimal sizing of a stand-alone hybrid system. It comprises a photovoltaic generator (PV), a proton exchange membrane fuel cell (FC) generator an electrolyzer (EZ) and battery (BAT) bank as energy storage systems. In order to efficiently exploit the energy sources of the hybrid system, a suitable sizing is necessary. In this paper, a new sizing method...
This work aims to analyze the performance of grid-connected photovoltaic (PV) system installed in the Saharan area of south Algeria (Adrar) in four different days, each one from different season of the year 2015. The results showed that temperature and irradiance play important role in system performance; the performance ratio and the system efficiency depend heavily on the temperature and drop from...
This paper discusses the impact of the combined action of storage and energy distribution management on the improvement of self-consumption in the residential sector. The case study is a house that is equipped with a photovoltaic system with backup and connected to the network. Several configurations of the PV-batteries system were considered in order to determine the optimal configuration to satisfy...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.