A new estimation method of irradiance on a partially shaded PV generator in grid-connected photovoltaic systems

Drif, M.; Pérez, Pedro Yobanis Piñero; Aguilera, J.; Aguilar, J.D.

doi:10.1016/j.renene.2007.12.010

Cited by 115 publications

(41 citation statements)

References 9 publications

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“…One of the major sources of power losses in such architecture arises when the PV generator is partially shaded by clouds or by surrounding obstacles such as in the case of urban environments [3]- [6]. These losses are mainly due to the electrical configuration of the PV generator, in particular to the hardwired series connection of PV modules in each string since a partially shaded module limits the string current where it is connected, thus reducing the maximum available dc power of the PV generator.…”

Section: Introductionmentioning

confidence: 99%

Electrical PV Array Reconfiguration Strategy for Energy Extraction Improvement in Grid-Connected PV Systems

Quesada

Guinjoan-Gispert

Pique-Lopez

et al. 2009

IEEE Trans. Ind. Electron.

524

159

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Abstract-This paper applies a dynamical electrical array reconfiguration (EAR) strategy on the photovoltaic (PV) generator of a grid-connected PV system based on a plant-oriented configuration, in order to improve its energy production when the operating conditions of the solar panels are different. The EAR strategy is carried out by inserting a controllable switching matrix between the PV generator and the central inverter, which allows the electrical reconnection of the available PV modules. As a result, the PV system exhibits a self-capacity for real-time adaptation to the PV generator external operating conditions and improves the energy extraction of the system. Experimental results are provided to validate the proposed approach.

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Section: Introductionmentioning

confidence: 99%

Electrical PV Array Reconfiguration Strategy for Energy Extraction Improvement in Grid-Connected PV Systems

Quesada

Guinjoan-Gispert

Pique-Lopez

et al. 2009

IEEE Trans. Ind. Electron.

524

159

View full text Add to dashboard Cite

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“…For a tilted surface a third component of irradiance may also be included: ground-reflected irradiance. The ground reflectivity is generally low, so this component is often quite small [4]. The incident irradiance on a surface is given by the relation:…”

Section: A Irradiancementioning

confidence: 99%

Matching PV array output with residential load by optimisation of array orientation

Ashok

Onwudinanti

Mouli

et al. 2015

2015 IEEE Eindhoven PowerTech

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“…This equation estimates the global irradiance over totally shaded surfaces by suppressing the direct component and the diffuse circumsolar component from the general equation, as proposed by other authors such as Tregenza (13) or Driz (16).…”

Section: Irradiance Over Façadesmentioning

confidence: 99%

A method to evaluate the adaptability of photovoltaic energy on urban façades

et al. 2014

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Solar simulation and evaluation tools are essential for the design of novel energy and environmental strategies. To date, a number published studies in this area focused on the analysis of flat roofs and small urban areas. This paper presents a method, based on Geographic Information Systems (GIS), for defining the potential of photovoltaic solar energy over urban façades. The method enables the generation of 3D solar maps from two standard data sources, namely cadastral cartography and data on solar irradiance registered by the Spanish State Meteorological Agency (AEMET, for its initials in Spanish).A series of charts have been generated relating the urban and solar geometries as a result of the numerical model. The charts permit the study of the optimal parameters for the photovoltaic integration over façades. Using this method, we demonstrate that the most suitable façades are those included within orientation angles of ±30º and with obstruction angles ≤ 45º.In addition, a study conducted over a representative urban area of Madrid is discussed as an example of the applicability of the discussed methodology. The results indicate that 7.22% of the area's façades are usable for the installation of photovoltaic solar energy, according to current Spanish regulations. Some 3,853 MWh of electric energy could be generated by photovoltaic panels, which would satisfy 45.6% of the energy consumed within the analysed zone.Finally, the adequacy of the Spanish Technical Edification Code (CTE, for its initials in Spanish), defining thresholds regarding the usability of photovoltaic energy, has been tested both theoretically and through the case study. Our study concludes that this regulation hinders the architectural integration of photovoltaic devices given the strict usability thresholds adopted. KeywordsSolar radiation, Irradiation on facades, Shading factor, Buildings integration photovoltaic, GIS

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A new estimation method of irradiance on a partially shaded PV generator in grid-connected photovoltaic systems

Cited by 115 publications

References 9 publications

Electrical PV Array Reconfiguration Strategy for Energy Extraction Improvement in Grid-Connected PV Systems

Electrical PV Array Reconfiguration Strategy for Energy Extraction Improvement in Grid-Connected PV Systems

Matching PV array output with residential load by optimisation of array orientation

A method to evaluate the adaptability of photovoltaic energy on urban façades

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