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The influence of spectral irradiance on the performance of different PV materials—amorphous silicon, CdTe, CIS, and monocrystalline silicon—is studied in two cities assumed representative of mid-latitude inland sunny sites not affected by extreme atmospheric characteristics. Experimental and modelled spectral mismatch factors at different timescales—instantaneous, monthly, and annual—were derived...
Electrical mismatches have a larger impact in high-concentrator photovoltaic power plants than in conventional photovoltaic systems because of the narrow acceptance angles and the unavoidable self-shading between sun trackers. In this paper, a commercial point-focus Fresnel lens-based high-concentrator photovoltaic module is characterized outdoors and results of this characterization are used to develop...
This work connects the electrical performance and economics of High Concentrator Photovoltaic technology beyond the cell and module levels. It analyses the impact of fundamental variables on the calculated energy output and economics of a typical system for real-world solar power plants in five locations with diverse climatic conditions. It was found that there exists a nearly linear relationship...
The modelling of the current–voltage characteristics of HCPV (high concentrator photovoltaic) modules is fundamental for the design, monitoring and energy prediction of HCPV systems and power plants. However, the modelling of these devices is inherently different and more complex than that of conventional PV (photovoltaic) modules. Because of this, considerable efforts have been done to develop models...
The spectral dependence of concentrator photovoltaic devices shows a larger and more complex behaviour than conventional photovoltaic devices due to the use of multi-junction solar cells and optical elements. The spectral factor is a widely used index for evaluating the spectral influence on the performance of conventional photovoltaics in outdoors. However, the experimental analysis of this index...
Nowadays, HCPV (high concentrator photovoltaics) is largely based on high efficiency MJ (multi-junction) solar cells. Hence, the prediction of the electrical parameters of MJ solar cells is crucial for designing and evaluating the performance of this emerging technology. At the same time, the analytical modelling of the I–V parameters of these devices is complex due to their strong and complex dependence...
In this paper, a methodology for characterizing the I–V curve of partially shaded high concentrator photovoltaic modules is presented. It takes into account atmospheric parameters (direct normal irradiance, ambient temperature, wind speed and air mass) as well as the amount of shading on each receiver lens and the module electrical configuration. Two high concentrator photovoltaic modules have been...
The prediction of the energy yield of HCPV (high concentrator photovoltaic) systems is crucial to evaluate the potential and promote the market expansion of HCPV technology. Currently, there is a lack of experience in the modelling of these kinds of systems due to the special features of such technology. In this work, a practical model based on simple mathematical expressions and atmospheric parameters...
The electrical characterization of a HCPV (high concentrator photovoltaic) module or system is key issue for systems design and energy prediction. The electrical modelling of an HCPV module shows a significantly greater level of complexity than conventional PV (photovoltaic) technology due to the use of multi-junction solar cells and optical devices. An interesting approach for the modelling of an...
This paper presents the outdoor measurements that have been carried out on two high concentration photovoltaic receivers integrated with Fresnel lens-based primary optics by reproducing partial shading conditions on the primary optics. Each solar receiver is composed of a multi-junction solar cell, a bypass diode, a heat sink and a secondary optical element. From the measurements, the electrical behavior...
The peculiarities of High Concentrator Photovoltaic (HCPV) modules make it very difficult to estimate their output. There are some methods to estimate the maximum power of an HCPV module which provide good results, but they are not easy to apply for the following reasons: a) they do not offer a comprehensive explanation of the entire procedure, b) they need some intrinsic parameters of MJ (multi-junction)...
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