Szczegóły publikacji
Opis bibliograficzny
Modelling of electrical power loss in photovoltaic panels in condition of partial shading / Wojciech KREFT, Estera PRZENZAK, Mariusz FILIPOWICZ // W: SDEWES 2017 [Dokument elektroniczny] : 12th conference on Sustainable Development of Energy, Water and Environment Systems : October 4–8, 2017, Dubrovnik, Croatia. — Wersja do Windows. — Dane tekstowe. — [Dubrovnik : s. n.], [2017]. — S. 0671-1–0671-15. — Wymagania systemowe: Adobe Reader. — Tryb dostępu: http://registration.sdewes.org/dub2017 [2018-02-13]. — Bibliogr. s. 0671-15, Abstr. — Dostęp po zalogowaniu
Autorzy (3)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 112372 |
|---|---|
| Data dodania do BaDAP | 2018-02-13 |
| Rok publikacji | 2017 |
| Typ publikacji | materiały konferencyjne (aut.) |
| Otwarty dostęp |  |
Abstract
The paper presents the problem of generation of electricity using photovoltaic panels in partial shading conditions. Generally, photovoltaic panels operate correctly with uniform illumination over their entire surface sensitive to light. When a portion of this surface is less illuminated, it is often no longer a part of the electricity generator, but a load (resistance). The structure of the photovoltaic panels consists of chains of serial cells, and these chains are connected in parallel. To improve the efficiency of the photovoltaic panels, bypass diodes are used. One bypass diode usually corresponds to a few or over a dozen cells connected in series. Its task is the transmission of electrical current outside the cells in case of its partial shading. Owing to the bypass diodes, photovoltaic systems work with higher efficiency, but above all, the diodes protect panels from thermal damage (hot spots) caused by the heat generation on the dimly lit cells as a result of large electric current. The paper presents a model of a photovoltaic panel implemented in the MATLAB/Simulink environment. The connection structure of cells corresponds to a photovoltaic system located at the AGH University of Science and Technology in Cracow. In presented model, each individual cell may be subject to different light intensity. The model therefore allows the analysis of the electrical power generated depending on the light profile of the photovoltaic system. The results of the model simulation may be applied in the optimization of the PV panels configuration on roofs characterized by many structural elements, antennas and other shadowing elements. The probability of possible damage (lifetime limit) due to hot spots may be also estimated.