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Energy analysis of the pv farm with a capacity of 140 MW

Walichnowska Patrycja, Idzikowski Adam

Quality Production Improvement - QPI

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2021

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Vol. 3, Iss. 1

369--376

EN

Recently, there has been a large development of photovoltaics in Poland and in the world. This work shows how the energy profit of a high-power photovoltaic farm changes with the change of the angle of inclination of the panels on the example of a PV power plant project in the Siemiatycze districtin the Podlaskie Voivodeship. In order to verify the energy gain, measurements were made in the PVSyst program for panels with a power of 600 Wp, the spacing of 10 m or 6 m for angles from 20° to 25°. Based on the analysis, the results were obtained, which indicate that with an increase in the angle of inclination in the studied range of angles, the annual production of energy by power plants increases. The difference between the production for the angle of 20° and the angle of 25° is 1010 MWh, which means profits higher by almost 1% per year. on the basis of the selected row spacing and angle, an analysis was carried out, which shows that the average amount of energy generated in a 140 MW installation will be approximately 149 246 MWh. The article also contains an analysis of losses which are generated during the work of PV panels.

2

Multi-criteria analysis for solar farm location suitability

Mierzwiak M., Calka B.

Reports on Geodesy and Geoinformatics

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2017

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Vol. 104

20--32

EN

Currently the number of solar farms, as a type of renewable sources of energy, is growing rapidly. Photovoltaic power stations have many advantages, which is an incentive for their building and development. Solar energy is readily available and inexhaustible, and its production is environmentally friendly. In the present study multiple environmental and economic criteria were taken into account to select a potential photovoltaic farm location, with particular emphasis on: protected areas, land cover, solar radiation, slope angle, proximity to roads, built-up areas, and power lines. Advanced data analysis were used because of the multiplicity of criteria and their diverse influence on the choice of a potential location. They included the spatial analysis, the Weighted Linear Combination Technique (WLC), and the Analytic Hierarchy Process (AHP) as a decision-making method. The analysis was divided into two stages. In the first one, the areas where the location of solar farms was not possible were excluded. In the second one, the best locations meeting all environmental and economic criteria were selected. The research was conducted for the Legionowo District, using data from national surveying and mapping resources such as: BDOT10k (Database of Topographic Objects), NMT (Numerical Terrain Model), and lands and buildings register. Finally, several areas meeting the criteria were chosen. The research deals with solar farms with up to 40 kW power. The results of the study are presented as thematic maps. The advantage of the method is its versatility. It can be used not only for any area, but with little modification of the criteria, it can also be applied to choose a location for wind farms.

3

Analiza wpływu zacienienia krystalicznych modułów PV na efektywność energetyczną farm słonecznych

Tatarczak J., Siedliska K., Kosacki R., Olchowik J.M.

Czasopismo Inżynierii Lądowej, Środowiska i Architektury / Journal of Civil Engineering, Environment and Architecture

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2015

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z. 62, nr 2

495--504

PL

Inwestycje związane z energetyką słoneczną posiadają stosunkowo długi czas zwrotu w odniesieniu do innych źródeł energii elektrycznej. Powodem tego są słabe uregulowania prawne wspierające rozwój tego rodzaju energetyki w Polsce. Jednak istnieją efektywniejsze sposoby pozyskiwania energii elektrycznej ze słońca, dzięki którym można znacznie skracać czas zwrotu tego typu inwestycji. Sposoby te można realizować już na etapie projektowania poprzez dobór modułów o wysokiej sprawności, odpowiedniego kąta ich nachylenia, czy też ograniczenie samo zacienienie modułów. W artykule został przeanalizowany wpływ cienia na moduły PV. Efekt cienia jest niekorzystnym zjawiskiem występującym podczas eksploatacji różnych systemów fotowoltaicznych, zarówno układów nadążnych, małych instalacji przydomowych, jak i dużych farm słonecznych. Zjawisko to powoduje zróżnicowanie poziomów napromieniowania słonecznego na powierzchni modułów, którego skutkiem jest obniżenie generacji energii elektrycznej. W najgorszym przypadku efekt cienia może wywołać trwałe uszkodzenie struktury ogniw, np. przez powstanie tzw. „gorących punktów”. Stosując odpowiednie algorytmy obliczeniowe, można przewidzieć skutki nieuniknionego zacienienia, a tym samym umożliwić podjęcie pewnych kroków zapobiegających występowaniu tego zjawiska już na etapie projektowania. Do tego celu służy analiza względnego ruchu słońca nad horyzontem przy uwzględnieniu typowych parametrów modułów fotowoltaicznych takich jak moc, długość czy szerokość oraz z ich kombinację ustawień na farmie fotowoltaicznej. Wyniki symulacji przedstawione w artykule pozwalają stwierdzić, w jaki sposób padający cień może wpływać na produkcję energii elektrycznej farmy słonecznej.

EN

Investments related to solar energy have a relatively long payback period in relation to other sources of electricity. The reason for this is problem are poor law regulations to promote the development of this type of energy in Poland. The payback period of solar energy investments is very long. The reason for this is the problem of weak regulation which support the development of this type of energy in Poland. However, there are effective methods to obtain electricity from the sun – the methods by which you can significantly shorten the time of reimbursement of capital expenditures. These methods can be implemented at the design stage by the selections of high-efficiency module and the proper angle of inclination, or by the reduction of the self-shading effect for modules. The article examined the impact of shadow on modules (a shadow effect). The shadow effect is a negative phenomenon for the different photovoltaic systems, starting from tacking systems, passing the large-scale solar farms and ending with the small domestic installations. This phenomenon causes the differentiation levels of the solar irradiation on the surface of modules and results in a decrease in generation of the electric potential energy. In the worst case scenario, the shadow effect can cause permanent damage to the structure of the solar cells – e.g. by creating so-called "hot spots". Using appropriate calculation algorithms, you may predict the effects of unavoidable shading, and thereby it allow you to take certain steps to prevent the occurrence of this phenomenon at the design stage. For this purpose the analysis of the relative movement of the sun above the horizon with taking into account the typical parameters of photovoltaic modules, such as power, length or width, and their combination of settings for a given photovoltaic farm. The simulation results, which are presented in the paper, enable reader to understand how to shadow can affect on the electricity production.