A method for simulating large PV arrays that include reverse biased cells

Orozco-Gutierrez, Martha Lucia; Scarpetta, José Miguel Ramírez; Spagnuolo, G.; Ramos‐Paja, Carlos Andrés

doi:10.1016/j.apenergy.2014.02.052

Cited by 27 publications

(9 citation statements)

References 16 publications

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“…A single diode model is considered with detailed modeling of bypass diodes. An extension of work done in [164] is presented in [166] which used Schur compliment for obtaining the inverse Jacobian matrix. The modeling is done at cell level using the model in [4].…”

Section: Iterative Methodsmentioning

confidence: 99%

Modeling of photovoltaic system for uniform and non-uniform irradiance: A critical review

Jena

Ramana

2015

Renewable and Sustainable Energy Reviews

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Section: Iterative Methodsmentioning

confidence: 99%

Modeling of photovoltaic system for uniform and non-uniform irradiance: A critical review

Jena

Ramana

2015

Renewable and Sustainable Energy Reviews

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“…The current in excess of i s over i ph flows through the bypass diode D by and not by R h . The diode activation imposes a small negative voltage to the module, forcing it to consume a small amount of power which is considered acceptable by commercial standards (Orozco-Gutierrez M. , Ramirez-Scarpetta, Spagnuolo, & Ramos-Paja, 2014). Such a condition is observed in Figures 2c and 2d, which present the V-I and P-I curves of the string formed by two ERDM-85 PV modules.…”

Section: Introductionmentioning

confidence: 69%

Fast calculation of the maximum power point of photovoltaic generators under partial shading

2016

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This paper presents a method to calculate the energy production of photovoltaic generators considering partial shading or mismatched conditions. The proposed method is based on the complete one-diode model including the bypass diode in its exponential form, where the current and voltage values of the modules composing the photovoltaic panel array are calculated without using the Lambert-W function. In addition, the method introduces a procedure to calculate the vicinity of the maximum power points, which enables the reduction of the operations required to obtain the global maximum. The proposed method provides short simulation times and high accuracy. On the other hand, since the method does not require complex mathematical functions, it can be implemented straightforwardly on known software packages and development languages such as C and C++. Those characteristics make this method a useful tool to evaluate the economic viability and return-of-investment time of photovoltaic installations. Simulation results and comparisons with a classical procedure confirm the good performance of the proposed method in terms of execution time and accuracy.Keywords: PV system, energy production, fast calculation, mismatching conditions, simulation time. RESUMENEste artículo presenta un método para calcular la producción energética en sistemas fotovoltaicos considerando sombreado parcial o condiciones no regulares. El método propuesto está basado en el modelo de un diodo completo incluyendo el diodo de bypass en su forma exponencial, donde la corriente y voltaje de los módulos son calculados sin utilizar la función Lambert-W. Adicionalmente, el método introduce un procedimiento para calcular la vecindad de los puntos máximos de potencia, lo cual permite una reducción en el número de operaciones requeridas para obtener el máximo global. El método propuesto proporciona tiempos de simulación cortos y alta precisión. Por otro lado, ya que el método no requiere funciones matemáticas complejas, puede ser implementado en conocidos paquetes computacionales y lenguajes de desarrollo como C y C++. Dichas características hacen de este método una herramienta útil para evaluar la viabilidad económica y el tiempo de retorno de inversión en instalaciones fotovoltaicas. Resultados de simulación y comparaciones con un procedimiento clásico confirman el buen desempeño del método propuesto en términos de tiempo de ejecución y precisión.Palabras clave: Sistema PV, producción energética, cálculo rápido, condiciones no regulares, tiempo de simulación.

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“…Once the cell irradiance values are evaluated, the V-I characteristic of each panel is computed by applying, for each cell, the single-diode model including the Bishop contribution [5,21]. After that the V-I characteristic of each PV panel is computed, it is possible to compute the same characteristic for the whole field, if a PV field series-parallel electrical structure is assigned, as discussed in the previous subsection.…”

Section: Photovoltaic Panels Reconfiguration Processmentioning

confidence: 99%

“…The cells are represented as a grid; ii) V-I characteristics of each panel. These characteristics have been produced by using the method in [21], with the parameters values summarized in Table 2.…”

Section: Simulation Frameworkmentioning

confidence: 99%

An evolutionary approach to the dynamical reconfiguration of photovoltaic fields

et al. 2015

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A method for simulating large PV arrays that include reverse biased cells

Cited by 27 publications

References 16 publications

Modeling of photovoltaic system for uniform and non-uniform irradiance: A critical review

Modeling of photovoltaic system for uniform and non-uniform irradiance: A critical review

Fast calculation of the maximum power point of photovoltaic generators under partial shading

An evolutionary approach to the dynamical reconfiguration of photovoltaic fields

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