Relevant bibliographies by topics / I-V curve

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Academic literature on the topic 'I-V curve'

Author: Grafiati
Published: 4 June 2021
Last updated: 14 March 2023

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Journal articles on the topic "I-V curve"

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Nagayoshi, H. "I–V curve simulation by multi-module simulator using I–V magnifier circuit." Solar Energy Materials and Solar Cells 82, no. 1-2 (May 1, 2004): 159–67. http://dx.doi.org/10.1016/j.solmat.2004.01.014.

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Noda, Kazuhiko, and Tomo Saito. "II. Fundamental Electrochemical Methods for Corrosion－Polarization Curve（i-V Curve）－." Zairyo-to-Kankyo 67, no. 1 (January 15, 2018): 9–16. http://dx.doi.org/10.3323/jcorr.67.9.

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Vélez-Sánchez, Jeisson, Juan Bastidas-Rodríguez, Carlos Ramos-Paja, Daniel González Montoya, and Luz Trejos-Grisales. "A Non-Invasive Procedure for Estimating the Exponential Model Parameters of Bypass Diodes in Photovoltaic Modules." Energies 12, no. 2 (January 18, 2019): 303. http://dx.doi.org/10.3390/en12020303.

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Bypass diodes (BDs) present in photovoltaic (PV) modules are represented by the exponential model, which requires two parameters: the inverse-saturation current ( I s a t , d b ) and the ideality factor ( η d b ). However, it is difficult to estimate those parameters since the terminals of the BDs are not isolated, hence there is only access to the series connection of the module BDs. This problem must be addressed since inaccurate BDs parameters could produce errors in the reproduction of the current-voltage (I-V) curves of commercial PV modules, which lead to wrong predictions of the power production. This paper proposes a non-invasive procedure to estimate I s a t , d b and η d b of the bypass diodes present in a PV module using two experimental I-V curves. One I-V curve is measured completely covering the submodule of the module whose BD will be parameterized; while the other I-V curve is measured without any shadow on the module. From those curves, the I-V curve of the BD is estimated and I s a t , d b and η d b are calculated by solving a system of two nonlinear equations. The proposed procedure is validated through simulations and experimental results considering a commercial PV module formed by three submodules, where the estimation errors in the reproduction of the BD I-V curve are less than 1% in the simulations and less than 10% in the experiments.
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Casado, P., J. M. Blanes, C. Torres, C. Orts, D. Marroquí, and A. Garrigós. "Raspberry Pi based photovoltaic I-V curve tracer." HardwareX 11 (April 2022): e00262. http://dx.doi.org/10.1016/j.ohx.2022.e00262.

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Aranda, Eladio, Juan Gomez Galan, Mariano de Cardona, and Jose Andujar Marquez. "Measuring the I-V curve of PV generators." IEEE Industrial Electronics Magazine 3, no. 3 (September 2009): 4–14. http://dx.doi.org/10.1109/mie.2009.933882.

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Casado, Pablo, José M. Blanes, Francisco Javier Aguilar Valero, Cristian Torres, Manuel Lucas Miralles, and Javier Ruiz Ramírez. "Photovoltaic Evaporative Chimney I–V Measurement System." Energies 14, no. 24 (December 7, 2021): 8198. http://dx.doi.org/10.3390/en14248198.

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The photovoltaic evaporative chimney is a novel solar-cooling system that serves a double purpose: it increases the efficiency of the photovoltaic (PV) panels and it cools down a water stream which can be used to dissipate the heat from a refrigeration cycle. One of the major issues arising from the operation of the chimney is the temperature stratification in the panel due to the movement of the air in the chimney. This effect can trigger the activation of the bypass diodes of the module, creating local maximum power points (MPP) that can compromise the grid-tied inverter tracking. To fill this gap, this paper deals with the design and implementation of an I–V curve measurement system to be used in the performance analysis of the system. The I–V curve tracer consists of a capacitive load controlled by a single board computer. The final design includes protections, capacitor charging/discharging power electronics, remote commands inputs, and current, voltage, irradiance, and temperature sensors.The results show that the modules bypass diodes are not activated during the tests, and no local MPPs appear. Moreover, the curves measured show the benefits of the photovoltaic chimney: the cooling effect increases the power generated by the PV panels by around 10%.
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Li, Jian-Quan, Xin-Yao Xie, Qing-He Zhang, Shu-Han Li, and Wen-Qi Lu. "Data processing of Langmuir probe I–V traces to obtain accurate electron temperature and density in Maxwellian plasmas." Physics of Fluids 34, no. 6 (June 2022): 067115. http://dx.doi.org/10.1063/5.0097089.

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The standard procedure for obtaining accurate electron temperature ([Formula: see text]) from Langmuir probe I– V characteristics measured in Maxwellian plasmas is studied by comparing the results of [Formula: see text] determined via different data-processing methods. The comparison results show that the width and position of the fitting interval in the transition region of the I– V curve as well as whether the ion collection current deducted from the I– V curve can significantly influence the calculation of [Formula: see text] and afford uncertainties in the calculation of electron density. The reasonable width of the linear fitting interval should be 30%–50% of the transition region width, and the results of [Formula: see text] are the most reliable, which are determined by the linear fitting intervals optimally selected from the electron part of I– V curves. Based on the results, a rigorous data-processing method is proposed to provide a standard procedure for obtaining reliable plasma parameters, especially accurate [Formula: see text] from Maxwellian plasmas using a Langmuir probe.
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González, Isaías, José María Portalo, and Antonio José Calderón. "Configurable IoT Open-Source Hardware and Software I-V Curve Tracer for Photovoltaic Generators." Sensors 21, no. 22 (November 18, 2021): 7650. http://dx.doi.org/10.3390/s21227650.

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Photovoltaic (PV) energy is a renewable energy resource which is being widely integrated in intelligent power grids, smart grids, and microgrids. To characterize and monitor the behavior of PV modules, current-voltage (I-V) curves are essential. In this regard, Internet of Things (IoT) technologies provide versatile and powerful tools, constituting a modern trend in the design of sensing and data acquisition systems for I-V curve tracing. This paper presents a novel I-V curve tracer based on IoT open-source hardware and software. Namely, a Raspberry Pi microcomputer composes the hardware level, whilst the applied software comprises mariaDB, Python, and Grafana. All the tasks required for curve tracing are automated: load sweep, data acquisition, data storage, communications, and real-time visualization. Modern and legacy communication protocols are handled for seamless data exchange with a programmable logic controller and a programmable load. The development of the system is expounded, and experimental results are reported to prove the suitability and validity of the proposal. In particular, I-V curve tracing of a monocrystalline PV generator under real operating conditions is successfully conducted.
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Zegrar, Mansour, M’hamed Houari Zerhouni, Mohamed Tarik Benmessaoud, and Fatima Zohra Zerhouni. "Design and implementation of an I-V curvetracer dedicated to characterize PV panels." International Journal of Electrical and Computer Engineering (IJECE) 11, no. 3 (June 1, 2021): 2011. http://dx.doi.org/10.11591/ijece.v11i3.pp2011-2018.

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In recent years, solar photovoltaic energy is becoming very important in the generation of green electricity. Solar photovoltaic effect directly converts solar radiation into electricity. The output of the photovoltaic module MPV depends on several factors as solar irradiation and cell temperature. A curve tracer is a system used to acquire the PV current-voltage characteristics, in real time, in an efficient manner. The shape of the I-V curve gives useful information about the possible anomalies of a PV device. This paper describes an experimental system developed to measure the current–voltage curve of a MPV under real conditions. The measurement is performed in an automated way. This present paper presents the design, and the construction of I-V simple curve tracer for photovoltaic modules. This device is important for photovoltaic (PV) performance assessment for the measurement, extraction, elaboration and diagnose of entire current-voltage I-V curves for several photovoltaic modules. This system permits to sweep the entire I-V curve, in short time, with different climatic and loads conditions. An experimental test bench is described. This tracer is simple and the experimental results present good performance. Simulation and experimental tests have been carried out. Experimental results presented good performance.
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Rekutov, O. G., V. M. Rulevskiy, A. G. Yudintsev, and А. М. Malyshenko. "Comparative analysis of I-V curve solar array simulator." Proceedings of Tomsk State University of Control Systems and Radioelectronics 22, no. 4 (2019): 89–95. http://dx.doi.org/10.21293/1818-0442-2019-22-4-89-95.

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Dissertations / Theses on the topic "I-V curve"

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Luna, MÃrcio Leal Macedo. "Development and validation of I x V curve tracer for photovoltaic modules." Universidade Federal do CearÃ, 2016. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=17151.

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CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior
The IxV curves tracers for PV modules are used as a method of diagnosis of problems such as shadowing, faulty connections and degradation conditions. There are several types and brands tracers commercially available, but their costs are quite high in the Brazilian market due to the need to import. This thesis describes the development and validation of a IxV curve tracer for PV modules based on the electronic load method using MOSFET as load to the module. By appropriate variation of the MOSFET gate-source voltage signal was possible to acquire the points of voltage and current of the PV modules terminals. These points were recorded using a data acquisition board with PIC18F2550, which is controlled by a computer via a USB with a graphical interface to the user. This interface was developed in MATLAB software ensuring greater flexibility and functionality to the device. For PV module temperature measurements PT100 sensors were used and measurements of solar irradiance was used a pyranometer LP02 model Hukseflux Thermal Sensor manufacturer, these sensors were connected to a supervisory system consists of a PC and a programmable logic controller (PLC). The validation process was conducted by comparing the electrical parameters provided by the developed tracer and the commercial tracer MINI-KLA. From this comparison an error was generated for each parameter. Three PV modules of different electrical characteristics (20 Wp, 87 Wp e 160 Wp) were used and there was similarity between the curves of the developed tracer with the curves of the commercial tracer. The average of errors of the electrical parameters for the 3 PV modules was less than 5% at no shading conditions. In two conditions of shading, the IxV curves provided by the two tracers for the KC 85 T PV module were compared and it was observed in the first situation that the MINI-KLA tracer could characterize only partially the curve while the tracer developed could characterize the curve fully, in the second situation there was great similarity between the curves of the two tracers with maximum percentage difference in the electrical parameters equal to 5.41%.
Os traÃadores de curva IxV para mÃdulos FV sÃo utilizados como um mÃtodo de diagnÃstico de problemas como sombreamento, conexÃes defeituosas e condiÃÃes de degradaÃÃo. Existem diversos tipos e marcas de traÃadores disponibilizados comercialmente, mas seus custos sÃo bastante elevados no mercado brasileiro devido à necessidade de importaÃÃo. A presente dissertaÃÃo aborda o desenvolvimento e a validaÃÃo de um traÃador de curva IxV para mÃdulos FV baseado no mÃtodo de carga eletrÃnica com uso de MOSFET como carga para o mÃdulo. AtravÃs da adequada variaÃÃo do sinal de tensÃo de gate-source do MOSFET foi possÃvel adquirir os pontos de tensÃo e corrente nos terminais dos mÃdulos FV. Estes pontos foram registrados atravÃs de uma placa de aquisiÃÃo de dados, com PIC18F2550, que à controlada via USB por um computador com uma interface grÃfica para usuÃrio. Esta interface foi desenvolvida com o software MATLAB, garantindo maior flexibilidade e funcionalidade ao dispositivo. Para mediÃÃes da temperatura do mÃdulo FV foram utilizados sensores PT100 e para as mediÃÃes de irradiÃncia solar foi utilizado um piranÃmetro modelo LP02 do fabricante Hukseflux Thermal Sensor; estes sensores foram utilizados atravÃs de um sistema supervisÃrio composto por um PC e um controlador lÃgico programÃvel (CLP). O processo de validaÃÃo foi realizado atravÃs da comparaÃÃo dos parÃmetros elÃtricos fornecidos pelo traÃador desenvolvido e pelo traÃador comercial MINI-KLA. A partir desta comparaÃÃo um erro foi gerado para cada parÃmetro. Foram utilizados 3 mÃdulos FV de diferentes caracterÃsticas elÃtricas (20 Wp, 87 Wp e 160 Wp) e observou-se proximidade entre as curvas do traÃador desenvolvido com as curvas do traÃador comercial. A mÃdia dos erros para os 3 mÃdulos relativa aos parÃmetros elÃtricos obtidos com os 2 traÃadores foi inferior a 5% em condiÃÃes sem sombreamento. Em duas condiÃÃes de sombreamento, as curvas IxV fornecidas pelos dois traÃadores relativas ao mÃdulo FV KC 85 T foram comparadas e observou-se na primeira situaÃÃo que o traÃador MINI-KLA conseguiu caracterizar apenas parcialmente a curva enquanto que o traÃador desenvolvido conseguiu caracterizar a curva totalmente, na segunda situaÃÃo observou-se grande proximidade entre as curvas dos dois traÃadores com diferenÃa percentual mÃxima nos parÃmetros elÃtricos igual a 5,41%.
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Kovářová, Veronika. "Variantní řešení silnice I/57 v úseku Semetín-Bystřička." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226452.

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The subject of my thesis is a variant I/57 in the section Semetín-Bystřička. The proposed route of communication, was part of an existing communications maintained for its full utilization. Were drawn four proposed variants of the solution, 3 variants are trying their best to use existing communication Jablůnka the village, one suggested option B that leads outside the existing road.
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Rodrigues, Pedro Manuel Fernandes. "Sistema de geração e aquisição das características I-V de módulos fotovoltaicos." Master's thesis, Instituto Politécnico de Bragança, Escola Superior de Tecnologia e de Gestão, 2009. http://hdl.handle.net/10198/2027.

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O presente trabalho consiste no desenvolvimento de um módulo electrónico de baixo custo, capaz de adquirir e traçar as curvas I-V (corrente versus tensão) de módulos fotovoltaicos, assim como medir outras grandezas utilizadas no diagnóstico de degradação, nomeadamente, tensão em circuito aberto, corrente de curto-circuito, radiação solar e temperatura. Numa primeira fase do trabalho decorrida no IPB, foram implementadas/testadas algumas montagens electrónicas com vista a verificar as possibilidades de implementação e validar a que melhor se coadunava para a implementação prática. De seguida, já no Ciemat, tomou-se conhecimento das distintas técnicas e procedimentos do Laboratório de Energia Solar Fotovoltaica para a realização de ensaios e medidas em módulos fotovoltaicos. Após a consolidação de conhecimentos, foi projectado, desenhado e construído um traçador de curvas I-V cumprindo os requisitos propostos, ou seja, de baixo custo e configuração simples. O módulo electrónico construído foi baseado na carga de um condensador de potência, uma carta de aquisição de dados e um comutador para duas opções de medida: módulos fotovoltaicos “convencionais” (10 A, 50 V) e módulos fotovoltaicos de lâmina delgada (2 A, 110 V). This work is based on the development of a low cost electronic module, able of acquiring and trace IV curves (current versus voltage) of photovoltaic modules, as well as measuring other quantities of the degradation diagnose, particularly open circuit voltage, current short circuit, radiation and temperature. On a former phase of this work, which took place at IPB, there were implemented/tested some electronic montages in order to verify the implementation possibilities and validate which suits better for the practical implementation. On a second phase, taking place at CIEMAT, there were acknowledged several techniques and procedures of the Photovoltaic Energy Laboratory for the execution of tests and measures on photovoltaic modules. After knowledge consolidation, it was projected, designed and built an IV tracer, according to the proposed requisites, as so, low cost and simple configuration. The electronic module built on his project, was based on the load of a power condenser, on data acquisition hardware and a two-measuring switch: conventional photovoltaic modules (10 A, 50 V), and thin-blade photovoltaic modules (2 A, 110 V).
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Devoto, Acevedo María Ignacia. "Solar module characterization via visual inspection in the field, I-V curve and thermal-image analysis." Tesis, Universidad de Chile, 2018. http://repositorio.uchile.cl/handle/2250/159569.

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Magíster en Ciencias de la Ingeniería, Mención Eléctrica. Ingeniera Civil Eléctrica
El desierto de Atacama anida abundantes recursos naturales en sus 105.000 km2. Éste contiene las reservas más grandes de cobre y productos no metálicos del mundo, y los niveles mundiales de irradiancia más altos con un promedio anual de 2.500 kWh/m2 de Irradiancia Horizontal Global (GHI), 3.500 kWh/m2 de Irradiancia Directa Normal (DNI) y de 4.000 horas de sol. A pesar de tener muchas ventajas, también presenta desafíos importantes. A modo de ejemplo, se sabe que las dosis anuales de UV-B en el desierto de Atacama son cerca de un 40% más altas que las típicas del norte de África. Esta parte del espectro no genera más electricidad y podría perjudicar los materiales utilizados en los módulos fotovoltaicos (FV), reduciendo su vida útil. Por ende, un módulo vidrio/vidrio (bifacial) especialmente diseñado para nuestro desierto es parte de la I+D+i FV en el programa solar nacional. Para materiales y diseños de módulos FV ya existentes, datos acerca de observaciones sobre su degradación son variables en su nivel de detalle, consistencia, calidad y significancia estadística. Además, la información disponible acerca de fallas típicas de módulos FV instalados en el desierto de Atacama es escasa o inexistente. A partir del contexto señalado, el objetivo principal de esta tesis es diseñar e implementar una herramienta de inspección para recolectar datos (IDCTool, por sus siglas en inglés), con el fin de evaluar módulos FV que operan en condiciones climáticas desérticas y caracterizarlos. La propuesta se basa en el estado-del-arte de prácticas en terreno junto con la definición de un conglomerado de criterios para su uso en soluciones FV de baja escala. Su implementación incluye el desarrollo de una encuesta, equipos y herramientas; y procedimientos para pruebas en terreno y análisis. IDCTool fue usada para una campaña en la región de Arica y Parinacota, la que es representativa de climas desérticos. Los resultados obtenidos fueron analizados de acuerdo con el procedimiento propuesto. La propuesta metodológica de esta tesis se validó mediante la campaña de Arica. Los 15 sitios visitados (comuna de Arica) fueron clasificados en 4 zonas: la costa, el centro de la ciudad, el valle y el desierto. Durante la campaña se inspeccionó 95 módulos FV, de los cuales se encontraron 9 fabricantes distintos. Los módulos operando por más tiempo llevaban 13 años instalados, los más nuevos llevaban 2 años. Todos los módulos inspeccionados estaban compuestos por un vidrio frontal, una lámina polimérica trasera y marco de aluminio. Según los resultados, no se presentaron fallas en cables, conectores ni celdas solares. La falla más típica fue el efecto soiling con 52 casos de soiling ligero y 39 de soiling fuerte. Otras fallas típicas fueron corrosión menor de la puesta a tierra (18 casos) y corrosión del marco (12 casos). En relación a los parámetros eléctricos, la mayor degradación se observó en la potencia nominal con una caída máxima de 39,08% y una caída promedio de 13,19±6,22%. En relación a la diferencia de temperatura de operación de los módulos FV con respecto a la temperatura ambiente, la mayor diferencia fue 24,45°C con un promedio de 11,67°C. Se encontró que la celda más caliente de todo el universo inspeccionado operaba a 99,4°C, mientras que en promedio las celdas más calientes operaban a 64,0°C. Con respecto a las anormalidades térmicas, se encontraron 2 módulos FV con patrón PID y 12 módulos mostraron celdas homogéneamente muy calientes. El trabajo realizado indica que la herramienta desarrollada, incluyendo la metodología para el análisis, entrega datos en formato estándar capaces de caracterizar módulos FV. Los datos analizados fueron estudiados mediante sus tendencias con el uso de herramientas estadísticas. Por ende, fue posible realizar conclusiones y recomendaciones. A pesar de esto, y debido a la falta de módulos inspeccionados, los fenómenos encontrados durante la campaña no pueden ser generalizados. En efecto, nuestro análisis no está validado por evidencia estadística sólida. En este contexto, el desarrollo de una base de datos significativa, mediante el uso de la IDCTool, será el mejor conjunto de datos como punto de partida para comenzar a hacer recomendaciones concluyentes para desarrollos en el ámbito FV.
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Oliveira, Fernando Schuck de. "Desenvolvimento de traçador de curvas I-V portátil para arranjos fotovoltaicos." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/127782.

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O presente trabalho apresenta o desenvolvimento de um traçador de curvas I-V para aplicação em arranjos fotovoltaicos a serem medidos em campo. Este sistema utiliza a carga capacitiva como método de polarização do gerador fotovoltaico sendo o chaveamento realizado por transistores bipolares de porta isolada (IGBT). Para controle do chaveamento dos IGBTs e aquisição dos pontos I-V, a placa Arduino foi aplicada demostrando-se adequada para a proposta. Para tanto foi escrito, em uma variação da linguagem de programação C++, o programa de controle desta placa. Foram construídos circuitos auxiliares de amplificação de sinal para realizar as medidas de corrente e de irradiância, sendo nestes casos, usados como sensores um resistor shunt e uma célula de referência calibrada, respectivamente. Para medida da temperatura foi aplicado o sensor de temperatura LM35 que apresentou resultados satisfatórios. Os dados adquiridos pela placa Arduino são salvos em um cartão de memória para posterior análise. A análise de incertezas foi realizada usando métodos estatísticos, onde foram determinados os erros sistemáticos e aleatórios para cada canal de medição. O protótipo construído foi aplicado no levantamento da curva I-V de um gerador fotovoltaico composto de uma série de 3 módulos instalada no terraço do prédio que abriga o simulador solar do Laboratório de Energia Solar da Universidade Federal do Rio Grande do Sul (LABSOL) e o seu resultado foi comparado com o sistema traçador de curvas do laboratório. O resultado, de maneira geral, foi satisfatório quando comparado com a medida a 2 fios pelo sistema do LABSOL, mas apresentou um erro maior quando comparado à medida a 4 fios. Este protótipo também foi submetido a um teste para avaliar sua capacidade de apresentar a curva I-V de forma adequada quando são provocados defeitos na série de módulos. O resultado apresentado pelo protótipo se mostrou bastante semelhante ao do apresentado pelo sistema do LABSOL. De maneira geral, pode-se afirmar que o protótipo, baseado em seus resultados, mostrou-se adequado para aplicação em medidas em campo de curvas I-V de arranjos fotovoltaicos.
This work presents the development of an IV tracer for in field measurement of PV arrays. This system uses a capacitive load as a method for polarizing the photovoltaic generator, with the switching being performed by insulated gate bipolar transistors (IGBT). To control switching of the IGBTs and acquisition of the IV curve, an Arduino board was applied, and was proved to be adequate for this purpose. The Arduino board control program was written in a variation of C++ language. Auxiliary circuits for amplifying the signal were built to measure electric current and irradiance, being in such cases used as sensors a shunt resistor and a calibrated reference solar cell, respectively. For obtaining the temperature, the LM35 temperature sensor was employed, presenting satisfactory results. The data acquired by the Arduino board are saved on a memory stick for later analysis. The uncertainty analysis was performed by using statistical methods, in which the systematic and random errors for each measurement channel were determined. The assembled prototype was applied for measuring the IV curve of a photovoltaic generator composed of a string of 3 modules located on the roof of one of the buildings from Solar Energy Laboratory of the Federal University of Rio Grande do Sul (LABSOL) and its result was compared with the IV tracer used on the laboratory. The result was, generally, satisfactory when compared with the two-wire measurement by the laboratory’s system, but showed a larger error when compared with the four-wire measurement. This prototype was also submitted to a test to evaluate its capacity of adequately presenting the IV curve when defects are induced on the string. The result presented by the prototype was quite similar to that obtained from LABSOL’s system. In general, it is possible to affirm that the prototype, based on its results, proved to be adequate for in field measurement of photovoltaic arrays.
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LUCIANI, SILVIA. "Strumenti e metodi innovativi per la gestione degli interventi di manutenzione effettuati su impianti fotovoltaici al fine del mantenimento della loro efficienza e funzionalità." Doctoral thesis, Università Politecnica delle Marche, 2021. http://hdl.handle.net/11566/291089.

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Nel corso della loro vita utile, gli impianti fotovoltaici sono soggetti ad un degrado continuo dei componenti con conseguente decremento della produzione attesa, nonché a guasti, avarie o malfunzionamenti. Per monitorare le prestazioni nel tempo e per individuare eventuali diminuzioni di performance, vengono utilizzate tecniche quali l’analisi dei dati di produzione e l’esecuzione di prove strumentali in campo. Data la carenza di procedure circa le tecniche sopra menzionate, sia nella modalità di esecuzione sia nella rappresentazione dei risultati, emersa dallo studio dello stato dell’arte, il principale obiettivo di questo lavoro è quello di definire un processo organico per indagare le performance d’impianto e per elaborare proposte di intervento atte ad incrementarne le prestazioni. A partire dalle analisi condotte sui dati provenienti da impianti fotovoltaici reali e dalle prove strumentali in campo, lo studio propone procedure per l’analisi dei di monitoraggio e per l’individuazione e l’esecuzione delle prove da svolgere e la successiva interpretazione e rappresentazione dei risultati. Inoltre, definisce proposte di intervento da mettere in atto per risolvere eventuali criticità emerse nelle fasi di indagine. In aggiunta, il presente lavoro ha perseguito due obiettivi parallelamente a quello principale sopra esposto. Il primo obiettivo ha riguardato l’esecuzione di “curve I-V” (corrente-tensione) su alcuni moduli fotovoltaici mediante l’impiego di un dispositivo per i flash test e l’individuazione della correlazione quantitativa tra alcuni tipici difetti riscontrabili con la termografia ad infrarossi su un modulo e il decremento di potenza associato. Il secondo obiettivo ha visto un focus all’accuratezza delle curve I-V attraverso il confronto tra i risultati delle misure in campo e quelli ottenuti in laboratorio attraverso l’impiego del flash-tester; la conclusione è la scarsa affidabilità delle curve I-V svolte in campo come strumento per valutare l’underperformance dell’impianto.
During their lifetime, photovoltaic plants are subject to a normal degradation of their components, and they are consequently characterized by decrease of the expected production. Techniques such as production data analysis and instrumental tests are performed in order to monitor performance over time and to identify power decrease. Examining the state of the art, a lack of procedures related to the abovementioned techniques, both in the execution mode and in the results representation, has emerged. The main aim of this work is to define an organic process to investigate the performance of photovoltaic plants and to elaborate intervention proposals in order to increase their production. Based on the analyses that have been performed on the data from real photovoltaic plants and instrumental tests, this work defines the procedures to analyze the data extracted from the monitoring systems and proposes the procedures to identify and perform the tests to be carried out and the subsequent interpretation and representation of the results. In addition, the present work has pursued two other objectives parallel to the main one described above. Using the I-V curves determined by means of an indoor solar flash test device, it has been possible to evaluate production loss associated to specific thermal defects that can be detected through infrared thermography on the photovoltaic modules. A specific focus was also dedicated to the accuracy of I-V curves through the comparison between the measurements that are performed in the field and those obtained in the laboratory by means of an indoor solar flash test device. This study has led to a relevant conclusion: the I-V curves, that are carried out in the field, are characterized by an inadequate reliability and they cannot be considered a valid technique to evaluate the underperformance of a photovoltaic plant.
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7

Baniahmad, Ata. "QUANTUM MECHANICAL Study and Modelling of MOLECULAR ELECTRONIC DEVICES." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/13193/.

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Molecular electronics pursues the use of molecules as fundamental electronic components. The inherent properties of molecules such as nano-size, low cost, scalability, and self-assembly are seen by many as a perfect complement to conventional silicon electronics. Molecule based electronics has captured the attention of a broad cross section of the scientific community. In molecular electronic devices, the possibility of having channels that are just one atomic layer thick, is perhaps the most attractive feature that takes the attention to graphene.The conductivity, stability, uniformity, composition, and 2D nature of graphene make it an excellent material for electronic devices. In this thesis we focused on Zigzag Graphene NanoRibbon(ZGNR) as a transmission channel. Due to the importance of an accurate description of the quantum effects in the operation of graphene devices, a full-quantum transport model has been adopted: the electron dynamics has been described by Density Functional Theory(DFT) and transport has been solved within the formalism of Non-Equilibrium Green’s Functions (NEGF). Using DFT and NEGF methods, the transport properties of ZGNR and ZGNR doped with Si are studied by systematically computing the transmission spectrum. It is observed that Si barrier destroyed the electronic transport properties of ZGNR, an energy gap appeared for ZGNR, and variations from conductor to semiconductor are displayed. Its followed by a ZGNR grown on a SiO2 crystal substrate, while substituting the Graphene electrodes with the Gold ones, and its effect on transmission properties have been studied. Improvement in transmission properties observed due to the formation of C-O bonds between ZGNR and substrate that make the ZGNR corrugated. Finally, we modeled a nano-scale Field Effect Transistor by implementing a gate under SiO2 substrate. A very good I-ON/I-OFF ratio has been observed although the device thickness.
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Zhou, Ruiping. "Structural And Electronic Properties of Two-Dimensional Silicene, Graphene, and Related Structures." Wright State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=wright1341867892.

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Fadhel, Siwar. "Efficacité énergétique et surveillance d’un microgrid à courant continu alimenté par des panneaux photovoltaïques." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASS001.

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Les systèmes photovoltaïques (PV) sont régulièrement exposés à de nombreux défauts entraînant des pertes de production coûteuses. Le travail proposé dans cette thèse porte sur l’amélioration de l’efficacité énergétique d’un microgrid à courant continu en minimisant les pertes liées à l’apparition des défauts PV. D’abord, nous avons présenté un état de l’art sur les défauts les plus fréquents et les méthodes de leur diagnostic. L’analyse de la littérature nous a orienté vers le choix d’une approche de diagnostic pilotée par les données. Ensuite, la méthode de l’Analyse en Composantes Principales (ACP) a été proposée pour la détection et la classification du défaut d’ombrage pour un module PV de 250 Wc. Nous avons exploité dans un premier temps toute la courbe I(V) acquise en conditions climatiques réelles. Un taux de réussite minimal de classement de 87.38% est obtenu en phase d’apprentissage et un taux de 97% est obtenu en phase de test. En deuxième temps, nous avons appliqué l’ACP en utilisant seulement les coordonnées MPP pour la détection de l’ombrage. Les données sont discriminées avec un taux de classification de 100%. L’Analyse Linéaire Discriminante (ALD) a été optée pour la prédiction des classes des nouvelles mesures MPP. Finalement, une étude des effets de trois défauts typiques a été menée à l’échelle d’une centrale PV de 250 kWc. Elle s’est basée sur les courbes I(V) simulées en considérant plusieurs sévérités pour chaque défaut. La sensibilité de la courbe I(V) centrale a été notée pour la dégradation de contact entre les strings PV et pour le défaut d’ombrage partiel à partir de 10%. Le défaut de court-circuit des modules PV, pour toutes les sévérités simulées, affecte beaucoup plus les courbes I(V) des strings
Photovoltaic (PV) systems are frequently subjected to several faults leading to costly production losses. The proposed work focuses on the improvement of the energy efficiency of a DC micro-grid by minimizing the losses related to the occurrence of PV faults. First, we presented a state of the art on the most recurrent faults and their diagnosis methods. The literature review has led us to adopt a data-driven diagnosis approach. Then, the Principal Component Analysis (PCA) method was proposed for PV shading fault detection and classification for a PV module of 250 Wp. The PCA was first performed using the entire I(V) curve obtained under real climatic conditions. A minimum classification success rate of 87.38% is obtained in the training step and 97% is obtained in the validation step. PCA was then applied using only the MPP coordinates to detect the shading fault. The data is discriminated with a classification rate of 100%.Linear Discriminant Analysis (LDA) was opted to predict the new MPP outdoor measurements’classes. Finally, a faults effects analysis study was carried out for three typical faults on the scale of a PV array of 250 kWp. The study was based on the simulated I(V) curves, considering differents severities of each fault. The sensitivity of the I(V) curve of the whole PV plant was observed for both the contact degradation between PV strings and the partiel shading starting from a severity of 10%. The short-ciruit fault of the PV modules has considerably more effect on the strings’ I(V) curves
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DORST, MATTHIJS. "Electrophysiological characterization of striatalneurons through dynamic I-V curves." Thesis, KTH, Skolan för datavetenskap och kommunikation (CSC), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-142426.

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Dynamic I-V curves constitute a naturalistic approach to electrophysiological neuronal characterization. Instead of analyzing a cells response to simple current injections and waiting for the cell membrane to stabilize, a dynamic I-V curve is generated by injecting a more naturalistic, dynamic input and analyzing the membrane response over a prolonged period of time. While this data is inherently noisy, it can be averaged out over longer recordings to produce accurate and detailed information on the current-voltage relationship of the cell membrane. For a number of different striatal neurons, a comparison is made between membrane properties as determined through conventional methods, and those same parameters extracted from the dynamic I-V curve. These are not always in agreement, although for some parameters like the membrane resistance and capacitance, the correlation is strong enough to be statistically significant. Furthermore, the dynamic I-V curve allows estimation of membrane resistance over a wide voltage range, unlike the traditional method, yielding a better insight in the summed opening and closing of voltage-gated ion channels. When these extracted parameters are then applied in a refractory Exponential Integrate and Fire model, the model is able to accurately mimic the response of the real neuron with minimal computational complexity.
Dynamiska I-V-kurvor utgör en fysiologiskt relevant ansats för att elektrofysiologiskt karakterisera neuroner. Istället för att analysera en cells svar på enkla ströminjektioner och vänta på att cellmembranet stabiliseras så genereras en dynamisk I-V-kurva genom att injicera en mer naturtrogen dynamisk input och sedan analysera membransvaret över en längre tidsperiod. Trots att denna typ av data i grunden är brusig kan man genom medelvärdesbildning producera noggrann och detaljerad information om ström- spänningsrelationen för cellmembranet. En jämförelse har gjorts mellan ett antal olika striatala neuronertyper för embranegenskaper bestämda genom konventionella metoder och motsvarande parametrar extraherade från den dynamiska I-V-kurvan. Parameteröverenstämmelsen är inte alltid god, men för parametrar som membranresistans och membrankapacitans så är korrelationen ändå stark nog att bli statisktiskt signifikant. Vidare, den dynamiska I-V-kurvan ger också möjlighet att estimera membranresistansen över ett brett spänningsintervall, till skillnad mot traditionella metoder. Detta medger en bättre insikt i hur spänningsstyrda jonkanaler öppnar eller stänger. När de extraherade parametrarna tillämpas på en integrerande tröskelfyrningsmodell av refraktär exponentiell typ så kan modellen mycket noggrannt beskriva neuronens respons och detta med minimal beräkningskomplexitet.
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Books on the topic "I-V curve"

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A, Bolotov A. Algebraic and algorithmic foundations An elementary introduction to Elliptic curve cryptography / Algebraicheskie i algoritmicheskie osnovy Elementarnoe vvedenie v ellipticheskuyu kriptografiyu. KomKniga, 2006.

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Hrushovski, Ehud, and François Loeser. The main theorem. Princeton University Press, 2017. http://dx.doi.org/10.23943/princeton/9780691161686.003.0011.

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This chapter introduces the main theorem, which states: Let V be a quasi-projective variety over a valued field F and let X be a definable subset of V x Γ‎superscript Script Small l subscript infinity over some base set V ⊂ VF ∪ Γ‎, with F = VF(A). Then there exists an A-definable deformation retraction h : I × unit vector X → unit vector X with image an iso-definable subset definably homeomorphic to a definable subset of Γ‎superscript w subscript Infinity, for some finite A-definable set w. The chapter presents several preliminary reductions to essentially reduce to a curve fibration. It then constructs a relative curve homotopy and a liftable base homotopy, along with a purely combinatorial homotopy in the Γ‎-world. It also constructs the homotopy retraction by concatenating the previous three homotopies together with an inflation homotopy. Finally, it describes a uniform version of the main theorem with respect to parameters.
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Stoneman, Paul, Eleonora Bartoloni, and Maurizio Baussola. Empirical Evidence on the Determination of the Extent of Product Innovation. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198816676.003.0008.

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This chapter considers determinants of product innovation across and within firms. Firms that are innovative in one dimension are also innovative in others; thus both what distinguishes the innovating firm and the literature based upon the analysis of various innovation indicators can give insight into the determinants of product innovation. It is concluded that (i) technological characteristics of industries matter; (ii) firm and market characteristics are related, but not linearly, to innovation; (iii) the two most important firm characteristics are internal finance and sales; (iv) there is an inverted U-curve relationship between competition and R&D; (v) competition in foreign markets is predominantly found to have positive effects on innovation at home; (vi) there are various spillover effects. Survey data on the constraints to innovation indicate that the issues considered to be of main importance are (i) innovation costs; (ii) risk and finance; and (iii) the availability of qualified labour.
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Brown, Belly. L. E. V. I. T. R. a : Pharmacotherapy: E. d Cure,guide to Completely Cure Erectile Dysfunction. Independently Published, 2019.

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Palmer, Doctor Juan. Z. O. V. I. R. A. x: The Ultimate Cure of Viral Infections Including Cold Sores Around the Mouth, Shingles, Genital Herpes and Chicken Pox. Independently Published, 2019.

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Beckett, William. Collection of Chirurgical Tracts: I. Of Wounds of the Head and Brain; II. New Discoveries Relating to the Cure of Cancers; III. Chirurgical Remarks on ... Venereal Disease; V. A New Method of Curing. Forgotten Books, 2018.

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Avances de investigación y vinculación UF 2021. ACVENISPROH EDICONES, 2021. http://dx.doi.org/10.47606/lib004.

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Este libro, surge en el preciso momento en que la humanidad atraviesa una gran adversidad; una pandemia, producto del covid-19, nos obligó a readaptarnos y a entender que la vida no se detiene: se reinventa de manera permanente, en sintonía con el universo. Es, precisamente, lo que muchos autores de la gestión organizacional ponen de manifiesto: La capacidad de una organización de reinventarse y adaptarse a la circunstancia del entorno. Esta publicación del Instituto Superior Universitario de Formación -UF-, es evidencia de ello. En medio de esta adversidad pandémica, se reinventa, y afronta el escenario universal desde su contribución a la academia; con el aporte de estas experiencias investigativas, con un discurso amigable y en procura de sensibilizar al lector en la apropiación de los conceptos abordados desde la reflexión y el discurso científico. Como resultado de ello, nos presentan este libro titulado: La investigación en el ámbito organizacional, donde nos presentan VI capítulos y en cada uno de ellos, se explora sobre conceptos que impactan en la empresa moderna (en todos sus tamaños), haciendo énfasis en el emprendimiento, como una figura que emerge dentro del panorama económico mundial. En el capítulo I, denominado: La educación inclusiva: una visión desde el docente investigador; se asume que la educación inclusiva es uno de los grandes avances de la educación del siglo XXI, y los docentes dentro de su rol como investigador han desempañado un rol invaluable. Sin embargo, en la práctica siguen existiendo algunas interrogantes acerca de la realidad que se presenta en las aulas de clase, cuando se trata de mediar procesos de educación inclusiva. Es por ello que, el objetivo de este capítulo es analizar la educación inclusiva desde la visión del docente investigador. Esto permitió a los autores concluir que, sin lugar a dudas, la realidad actual requiere de un modelo de educación inclusiva donde el rol del docente investigar es fundamental para garantizar a todos los niños, niñas, jóvenes y adultos, una educación de calidad. Sin que sean excluidos por razones de la raza, condición social, cultura o religión. De la misma manera, el capítulo II: Seguridad y prevención de riesgos empresariales: Fundamentos e importancia, ofrece evidencia que el factor humano dentro de las organizaciones empresariales es un elemento indispensable para su funcionamiento, por lo que estas organizaciones deben velar por ofrecer un clima laboral estable y con posibilidades de crecimiento profesional y personal para sus trabajadores, además de ofrecer las condiciones que permita a su talento humano ejercer sus funciones bajo las medidas adecuadas en prevención de riesgos. Es por ello, que los autores describen los fundamentos básicos recomendados para asegurar la seguridad y prevención de riesgos que toda organización empresarial debe tener como política de funcionamiento. Desde este contexto, en el capítulo III, titulado: El emprendedor: Una aproximación teórica; los autores expresan que cada emprendedor debe desarrollar habilidades y competencias que vayan a correspondencia al éxito de su emprendimiento. Sin lugar a duda, estas cualidades no son innatas, pero se van aprehendiendo y desarrollando en el transcurso de la curva de aprendizaje de esta experiencia. Se infiere que un emprendedor es aquel que cuenta con la virtud de detectar y manejar problemas y oportunidades mediante el aprovechamiento de sus capacidades y los recursos a su alcance. Son líderes soñadores con talentos, habilidades y destrezas que desarrollan asertivamente para alcanzar sus sueños en el campo empresarial. Un emprendedor debe tener la capacidad de exploración, desarrollar un pensamiento emprendedor, actúa sobre el medio para cambiarlo, tener la habilidad para la resolución de problemas e iniciativa propia. Todas estas ideas son, en el momento actual, aún más vigentes. 2 Volver índice general El capítulo IV, Ciencias administrativas y el rol del docente investigador en la educación superior; explora la relación manifiesta del docente en su rol de investigador en las disciplinas de carácter administrativo. En este sentido, la investigación es el medio para abordar dichos cambios y convertirlos en oportunidades y alternativas de éxito y progreso en el campo de la administración. Por tanto, es fundamental promover el desarrollo efectivo del rol del docente como investigador en la universidad. El docente universitario debe preocuparse por desarrollar competencias, habilidades, actitudes necesarias para formarse en su rol como investigador, a fin de promover estas competencias en sus educandos. Además, debe ser capaz de abordar el contexto educativo como una realidad dinámica y en constante transformación, en sintonía con el entorno. En el capítulo V, donde se explora al Plan operativo, como herramienta para la gestión organizacional; se destaca a este mecanismo gerencial como una herramienta que permite coadyuvar al control, evaluación y seguimiento óptimo de las acciones y actividades que conllevan a la gestión organizacional; porque permite evaluar el progreso de las metas de la organización y de la calidad de los productos. De esta manera, el plan operativo vendría a constituirse en un documento donde se especifican, por escrito, cuáles serán los pasos a seguir por la empresa y las acciones que deberán desempeñar cada uno de los involucrados en los procesos para alcanzar la meta planteada al final de cada etapa. Esto quiere decir que el Plan Operativo es una referencia significativa que se adapta, además, en correspondencia al entorno organizacional. Finalmente, el capítulo VI, La investigación y el diseño gráfico: una convergencia productiva; diserta sobre una relación importante del abordaje científico y su aplicabilidad en una disciplina académica reciente, como lo es el diseño gráfico. Ello, permitirá a los cursantes de esta carrera encontrar soluciones, desde la metódica investigativa, a los problemas y situaciones por mejorar que se enfrentan durante su ejercicio profesional. Así pues, se asume que la iniciativa investigativa es pertinente y relevante en la formación del diseñador gráfico y en su quehacer profesional, ya que permite perfeccionar técnicas y desarrollar nuevos conocimientos, desde lo meramente estético hacia la calidad de su trabajo como profesional del diseño en sintonía con los objetivos comunicacionales de la organización. Cada uno de estos capítulos, aporta una aproximación teórica sobre cada uno de los temas abordados, demostrando que la investigación es un eje trasversal en el área organizacional ya que, gracias a ella, se puede configurar información confiable que sirve como base para la toma de decisiones y edificar alternativas de mejoras en pro, tanto de los trabajadores como de las organizaciones. Este libro brinda a los lectores, elementos, características y estrategias aplicables dentro de las organizaciones con el fin de contribuir al crecimiento y éxito profesional, aún más a la figura del emprendedor, tan vigente en el momento actual de la humanidad.
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Book chapters on the topic "I-V curve"

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Smeets, J., M. Van Roy, and P. Nagels. "I-V Curve Fitting for a-Si:H Solar Cells." In Seventh E.C. Photovoltaic Solar Energy Conference, 539–43. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3817-5_95.

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Sarikh, Salima, Mustapha Raoufi, Amin Bennouna, Ahmed Benlarabi, and Badr Ikken. "Photovoltaic Discoloration and Cracks: Experimental Impact on the I-V Curve Degradation." In Lecture Notes in Electrical Engineering, 609–16. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-1405-6_69.

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Hasan, Abdulwahab A. Q., Ammar Ahmed Alkahtani, and Nowshad Amin. "Modeling and Performance Evaluation of Solar Cells Using I-V Curve Analysis." In Lecture Notes in Networks and Systems, 643–50. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-25274-7_56.

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Malik, Praveen Kumar, Rajesh Singh, and Anita Gehlot. "Online Monitoring of Solar Panel Using I–V Curve and Internet of Things." In Lecture Notes in Networks and Systems, 225–34. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3369-3_17.

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Siu, Christopher. "Interpreting I-V Curves." In Electronic Devices, Circuits, and Applications, 1–9. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-80538-8_1.

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Faria, Mateus H. R., Rafael V. T. da Nobrega, and Ulysses R. Duarte. "10-Steps Method to Extract the I-V Curve of Resonant Tunneling Diode Based on Experimental Data Preserving Physical Parameters." In Proceedings of the 4th Brazilian Technology Symposium (BTSym'18), 303–12. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-16053-1_29.

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Matsukura, F. "Ga1–xMnxSb: Curie temperature, magnetic anisotropy." In New Data and Updates for III-V, II-VI and I-VII Compounds, 379. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-92140-0_280.

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Matsukura, F. "Ga1–xCrxAs: Curie temperature, magnetic circular dichroism." In New Data and Updates for III-V, II-VI and I-VII Compounds, 125. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-92140-0_98.

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Matsukura, F. "Ga1–xMnxAs: exchange integrals, Curie temperature, magnetic anisotropy." In New Data and Updates for III-V, II-VI and I-VII Compounds, 192. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-92140-0_143.

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Hönerlage, B. "CuBr: phonon dispersion curves, phonon density of states." In New Data and Updates for III-V, II-VI and I-VII Compounds, 255–56. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-92140-0_191.

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Conference papers on the topic "I-V curve"

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Antonov, Andrei Yu, and Marina I. Varayun'. "I–V curve investigation with regression methods." In 2016 14th International Baltic Conference on Atomic Layer Deposition (BALD). IEEE, 2016. http://dx.doi.org/10.1109/bald.2016.7886533.

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Gupta, Abhishek Kumar, Narendra Singh Chauhan, and Ravi Saxena. "Real time I-V and P-V curve tracer using LabVIEW." In 2016 International Conference on Innovation and Challenges in Cyber Security (ICICCS-INBUSH). IEEE, 2016. http://dx.doi.org/10.1109/iciccs.2016.7542320.

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Sapaklom, T., K. Janhom, C. Sipirah, P. Kjitdamkean, P. Navaratana Na Ayudhya, E. Mujjalinvimut, and J. Kunthong. "IoT Based I-V and P-V Curve Analyzer system for small PV panels PART I." In 2022 25th International Conference on Electrical Machines and Systems (ICEMS). IEEE, 2022. http://dx.doi.org/10.1109/icems56177.2022.9983441.

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Wang, Zhiming, Zhengbang Gong, Yuhong Bu, and Guangpu Wei. "Correlating the I-V curve of solar cell with IRAGA." In Instruments (ICEMI). IEEE, 2009. http://dx.doi.org/10.1109/icemi.2009.5274522.

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Zhu, Yechen. "An Adaptive I-V Curve Detecting Method for Photovoltaic Modules." In 2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC). IEEE, 2018. http://dx.doi.org/10.1109/peac.2018.8590262.

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Erkaya, Yunus, Isaac Flory, and Sylvain X. Marsillac. "Development of a string level I–V curve tracer." In 2014 IEEE 40th Photovoltaic Specialists Conference (PVSC). IEEE, 2014. http://dx.doi.org/10.1109/pvsc.2014.6925594.

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Tsukuda, Masanori, Li Guan, Kazuha Watanabe, Haruyuki Yamaguchi, Kenshi Takao, and Ichiro Omura. "V-I Curve Based Condition Monitoring System for Power Devices." In 2020 32nd International Symposium on Power Semiconductor Devices and ICs (ISPSD). IEEE, 2020. http://dx.doi.org/10.1109/ispsd46842.2020.9170059.

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Skoczek, Artur, Tony Sample, and Ewan D. Dunlop. "Fill factor dependence of bilinear I–V curve translation accuracy." In 2008 33rd IEEE Photovolatic Specialists Conference (PVSC). IEEE, 2008. http://dx.doi.org/10.1109/pvsc.2008.4922591.

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Wilker, Charles, Philip S. W. Pang, Charles F. Carter, and Zhi-Yuan Shen. "S-Parameter, I-V Curve and Noise Figure Measurements of III-V Devices at Cryogenic Temperatures." In 39th ARFTG Conference Digest. IEEE, 1992. http://dx.doi.org/10.1109/arftg.1992.326974.

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Zbib, Batoul, and Hiba Al Sheikh. "Fault Detection and Diagnosis of Photovoltaic Systems through I-V Curve Analysis." In 2020 International Conference on Electrical, Communication, and Computer Engineering (ICECCE). IEEE, 2020. http://dx.doi.org/10.1109/icecce49384.2020.9179390.

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Reports on the topic "I-V curve"

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L Danielson and D Depoy. Accurate Method for Forward and Reverse Bias Curve Fitting of TPV I-V Data. Office of Scientific and Technical Information (OSTI), May 2006. http://dx.doi.org/10.2172/882557.

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Warrick, Arthur W., Gideon Oron, Mary M. Poulton, Rony Wallach, and Alex Furman. Multi-Dimensional Infiltration and Distribution of Water of Different Qualities and Solutes Related Through Artificial Neural Networks. United States Department of Agriculture, January 2009. http://dx.doi.org/10.32747/2009.7695865.bard.

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Abstract:
The project exploits the use of Artificial Neural Networks (ANN) to describe infiltration, water, and solute distribution in the soil during irrigation. It provides a method of simulating water and solute movement in the subsurface which, in principle, is different and has some advantages over the more common approach of numerical modeling of flow and transport equations. The five objectives were (i) Numerically develop a database for the prediction of water and solute distribution for irrigation; (ii) Develop predictive models using ANN; (iii) Develop an experimental (laboratory) database of water distribution with time; within a transparent flow cell by high resolution CCD video camera; (iv) Conduct field studies to provide basic data for developing and testing the ANN; and (v) Investigate the inclusion of water quality [salinity and organic matter (OM)] in an ANN model used for predicting infiltration and subsurface water distribution. A major accomplishment was the successful use of Moment Analysis (MA) to characterize “plumes of water” applied by various types of irrigation (including drip and gravity sources). The general idea is to describe the subsurface water patterns statistically in terms of only a few (often 3) parameters which can then be predicted by the ANN. It was shown that ellipses (in two dimensions) or ellipsoids (in three dimensions) can be depicted about the center of the plume. Any fraction of water added can be related to a ‘‘probability’’ curve relating the size of the ellipse (or ellipsoid) that contains that amount of water. The initial test of an ANN to predict the moments (and hence the water plume) was with numerically generated data for infiltration from surface and subsurface drip line and point sources in three contrasting soils. The underlying dataset consisted of 1,684,500 vectors (5 soils×5 discharge rates×3 initial conditions×1,123 nodes×20 print times) where each vector had eleven elements consisting of initial water content, hydraulic properties of the soil, flow rate, time and space coordinates. The output is an estimate of subsurface water distribution for essentially any soil property, initial condition or flow rate from a drip source. Following the formal development of the ANN, we have prepared a “user-friendly” version in a spreadsheet environment (in “Excel”). The input data are selected from appropriate values and the output is instantaneous resulting in a picture of the resulting water plume. The MA has also proven valuable, on its own merit, in the description of the flow in soil under laboratory conditions for both wettable and repellant soils. This includes non-Darcian flow examples and redistribution and well as infiltration. Field experiments were conducted in different agricultural fields and various water qualities in Israel. The obtained results will be the basis for the further ANN models development. Regions of high repellence were identified primarily under the canopy of various orchard crops, including citrus and persimmons. Also, increasing OM in the applied water lead to greater repellency. Major scientific implications are that the ANN offers an alternative to conventional flow and transport modeling and that MA is a powerful technique for describing the subsurface water distributions for normal (wettable) and repellant soil. Implications of the field measurements point to the special role of OM in affecting wettability, both from the irrigation water and from soil accumulation below canopies. Implications for agriculture are that a modified approach for drip system design should be adopted for open area crops and orchards, and taking into account the OM components both in the soil and in the applied waters.
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