The diploma thesis covers current topics regarding renewable sources for the production of electricity. Fossil fuels are becoming a growing problem that has a negative impact on the environment. That is why we are increasingly focusing on the use of renewable energy sources. Currently, the most growing renewable energy sources are wind and the Sun.
The purpose of the thesis is to provide the basics of obtaining electricity by utilizing solar radiation in a solar power plant and to examine the possibility of self-sufficiency. For the time when there is not enough solar radiation available, it is necessary to study the size of the battery as an energy store and assess its adequacy.
The first part of the thesis is devoted to a brief history of the beginnings of using solar energy, the photovoltaic effect, energy storage and the first electric charge storage devices, or batteries. Second part is more theoretical, and in this part the reader learns about the operation of a solar cell, the generation of current in it, and learns about the types of solar cells and the operation of the battery. The following is the research part, during which we observed the set model of the solar power plant and the storage of electricity. We find that the production of electricity is conditioned by solar radiation, which changes over time, and the power of production follows this as well. Given that the intensity of solar radiation varies throughout the seasons, I decided to divide the production into seasons. It is expected that the largest amount of electricity produced will be in the summer time, its average value was 495.21 kWh/day, followed by production in the spring with 448.83 kWh/day, then the autumn period with 170 kWh/day and the least produced in the winter is an average of 161 kWh/day day. As power changes, so does battery usage. The battery must be selected based on the period in which we have the smallest production, in our case it is winter. We choose a battery for the 48 V voltage system, which allows us to have a smaller battery and less losses. Size Capacity Bbaterijae, which comes into consideration depending on the degree of discharge, varies between 2529 Ah and 3502 Ah. Depending on how many percentages we want our batteries to be discharged. But if, instead of the winter average, we took into account the worst conditions, when there is no sun for several days, we would need an even more powerful battery.
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