@article{Citkuseva Dimitrovska_Golubovski_Spasevska_Stefanov_Kukuseva Paneva_2021, title={INVESTIGATION OF EFFICIENCY ASPECTS IN 3×3 PHOTOVOLTAIC PLANT USING MODEL OF SHADING}, volume={1}, url={https://js.ugd.edu.mk/index.php/etima/article/view/4522}, abstractNote={<p><strong>Abstract</strong><br>Solar irradiation is the most affordable renewable energy source, implementable even on household level. The<br>considerably lower cost of setup and maintenance compared to the other renewable energies makes it a<br>preferable choice in regions with lot of sunny days throughout the year. One of the main R&D aspects of<br>interest of the Photovoltaic (PV) technologies is the efficiency of the PV conversion, which is dealt with on<br>material level. Additional efficiency aspects could be a field of research in support to higher energy<br>production. One of them is the land use efficiency of the utilized plot surface. Namely, the usual approach in<br>populating the plot used by the plant is with row and column distances that guarantee no inter-shading among<br>the panels. This paper presents results of research proposing use of denser panel population in the plot, with<br>allowed inter-shading which under some approximation provides calculations of lower individual panel<br>efficiency but much higher overall land use efficiency. The research project proposes an inter-shading model<br>in a 3×3 PV plant, which can be validated in CAD applications. A clear-sky irradiation model is then used to<br>estimate plant’s power at certain moment in the year, and calculation of energy production. Sun position and<br>its incidence angle are calculated using a verified model. The analytical software uses the following input<br>parameters - plant geo-location (latitude, longitude, time zone); panel geometry (width, height); plant<br>geometry (inter-row and inter-column distances, panel inclination angle); and date and time. The intershading<br>model results in total plant exposed PV surface to direct solar irradiation, as well as in the total<br>shaded PV surface receiving diffuse (and reflected) radiation. The energy model can then be used for power<br>and energy calculations, as well as optimal inclination, inter-row and inter-column estimations. If panel<br>technologies allow small segmentation with protective diodes implementing approximation that whole directly<br>exposed surface performs PV conversion, then allowed inter-shading and thus denser panel populated plant<br>plot may prove cost-effective.<br><strong>Key words</strong><br>solar irradiation, photovoltaic conversion, intershading, land use efficiency.</p>}, number={1}, journal={ETIMA}, author={Citkuseva Dimitrovska, Biljana and Golubovski, Roman and Spasevska, Hristina and Stefanov, Goce and Kukuseva Paneva, Maja}, year={2021}, month={Oct.}, pages={309-318} }