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Performances comparison of innovative PV technologies in different sites

pubblicazioni - Articolo

Performances comparison of innovative PV technologies in different sites

Vengono descritte le attività sperimentali svolte da ERSE per la valutazione di prestazione di impianti con moduli fotovoltaici innovativi di differente tecnologia. In particolare sono presentati i dati di funzionamento, relativi al primo anno di esercizio, dei due Impianti “gemelli” installati a Milano e a Catania.

Since an increasing number of different PV technologies is commercially available, two multi-section PV power plants have been installed in two different sites at different meteorological conditions, in order to evaluate the variation of the PV module efficiency, the total energy production and the reliability of the PV plant components. Each plant is made of 6 sections: polycrystalline silicon, two high-performance monocrystalline silicon, CIS, CdTe and amorphous silicon modules. All the sections have the same orientation and the same tilt angle. Moreover, inverters, other components and supporting structures are the same. In order to have a very high accuracy of the energy and meteorological measure over time, a monitoring system have been developed and installed on each section, measuring irradiance, PV module temperature, ambient temperature, DC and AC voltage, current and power. After 14 months from the connection to the grid, all the plants showed a high reliability of all the components, and a very different PV module performance. All the crystalline silicon modules had a monthly DC performance ratio higher than 88%, and low seasonal variation. The CIS modules were performing pretty bad (PRdc always lower than 84%, even down to 64% in wintertime), while the a-Si modules perform with a very high seasonal variation. The cadmium telluride modules show a good PRdc level, with some seasonal variation (worse performance in winter), but not so relevant.

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