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High-current solid state relay
Daďa, Pavel ; Ctibor, Jiří (referee) ; Červinka, Dalibor (advisor)
The bachelor's thesis deals with the design of an electronic semiconductor contactor for power switching of battery systems. The work includes familiarization with the function and use of photovoltaic systems and familiarization with types of battery systems. Furthermore, the original solution using the GIGAVAC GX23 power contactor and introduction along with the design and dimensioning of the newly proposed solution using a power semiconductor contactor. The conclusion of the work summarises the findings of the design and possible extension of the final product. The text of the thesis is divided into six chapters. The first chapter contains a description of the issue of connecting battery modules in the FVE area. The second chapter deals with the issue of connecting battery blocks. The third chapter contains a general description of the SSR for alternating voltage switching. The following fourth chapter describes SSR relays for dc voltage switching. The fifth chapter describes the specific solution of the power switch including the dimensioning of the power elements and the design of the radiator. In the next chapter, the knowledge and possibility of further development of the SSR contactor.
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Embedded Wireless Monitoring and Control of Photovoltaic System
Kovács, Attila ; Lojda, Jakub (referee) ; Strnadel, Josef (advisor)
Na trhu s obnoviteľnými zdrojmi energie je veľká konkurencia. Najčastejšie sa v domácnostiach využívajú fotovoltaické systémy. Avšak aj napriek ich častému využitiu v domácnostiach im bežný používateľ nerozumie a ponecháva niektoré záležitosti spoločnosti, ktorá vykonáva inštaláciu. Táto bakalárska práca najprv čitateľa oboznámi s rôznymi komponentami, z ktorých fotovoltaický systém pozostáva. Neskôr popisujeme vytvorenie prototypu. Tento prototyp je univerzálnym riešením pre monitorovanie a riadenie výkonu akéhokoľvek fotovoltaického systému. Dosiahneme to meraním výkonu každého fotovoltaického panelu, s týmito údajmi môžeme diagnostikovať chybný panel a porovnaním celkového výkonu fotovoltaických panelov s výstupom meniča včas zistiť poruchu meniča. Pre prístup k údajom bola vytvorená jednoduchá webová aplikácia. Súčasný prototyp je schopný merať prechádzajúcu energiu a prepínať výstupnú energiu. V záverečnej časti práce popisujeme súčasné nedostatky prototypov a možné spôsoby ich zmiernenia, venujeme sa aj problémom, ktoré vznikli pri tvorbe prototypu a aj ich riešeniam.
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Design of photovoltaic system configurations for a family house
Prágr, Vojtěch ; Zlevorová, Tereza (referee) ; Toman, Filip (advisor)
This bachelor thesis focuses on the design of a photovoltaic system for a specific single-family house. During the draft, the house’s energy consumption was processed, and based on this data, three different system configurations were proposed. Two of these configurations have different power outputs and storage capacities, while the third was designed to operate the water heater that the house contains. In the thesis, the proposed systems were evaluated from an economic perspective, considering the initial costs of individual systems, as well as the operation and service expanses. Finally, according to these aspects, the ROIs of individual configurations were determined.
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Detailed analysis of the cybersecurity of photovoltaic systems
Turek, Adam ; Bohačík, Antonín (referee) ; Mikulášek, Michal (advisor)
Cílem diplomové práce je seznámení se s metodami útoků na fotovoltaické systémy a jejich komponenty. Dále analyzování jednotlivých typů fotovoltaických systémů, jednotlivých komponent a možných bezpečnostních nedostatků. Dále navržení a sestavení testovacího pracoviště umožnující sledování fotovoltaických prvku a síťového provozu s implementovaním několika kybernetických útoků. Práce popisuje teoretickou část fotovoltaických systémů a jejich komponent, kybernetickou bezpečnost a možné útoky. Krom toho také analýzu konkrétních zranitelností na fotovoltaické systémy, která byla provedena prostřednictvím veřejně známých databází jako je Vulners nebo Národní Databáze Zranitelností. Dále popis testovacího prostředí střídačů Solax a Solinteg, implementační nástroje a úspěšně provedenou síťovou, Modbus a kybernetickou analýzu na fotovoltaické střídače s odsimulováním útoků.
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Solar systems utilization for family house energy demand
Šamanová, Jaroslava ; Toman, Filip (referee) ; Sitek, Tomáš (advisor)
Solar systems are more and more common part of residential houses. Main reason for this, is that solar elements are state-supported with subsidies, which is reducing payback time of these investments. At the same time, the prices for these systems are dropping. The state support is connected with effort to reduce dependancy on non-renewable energy sources, e.g. coal powerplants, which are polluting atmosphere. State administration i salso the reason for large scale solar powerplant constructions, which are, according to some opinions, misshaping the landscape and covering large areas of sometimes fertile land.
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Design of ecological heating of a family house
Kořínek, Vladimír ; Máca, Josef (referee) ; Jandová, Kristýna (advisor)
This diploma thesis deals with the design of ecological heating for a family house. The main objective is to find the most advantageous variant of the heating and water heating system using a heat pump in cooperation with an alternative heating system. Thermal losses are calculated for the selected object, and several heating designs are made based on the calculations. Then the economic return of the designs is calculated.
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Monitoring of air flow around photovoltaic modules
Herman, Michal ; Křivík, Petr (referee) ; Vaněk, Jiří (advisor)
This diploma thesis deals with the flow of air around photovoltaic modules and the associated effect on their temperature and overall performance. In the thesis, a device for sensing the mentioned quantities is designed and it is compared with similar types of devices in terms of price, dimensions and accuracy. Furthermore, the thesis describes the placement of individual sensors and sensing interval of quantities. In the second part of the thesis, long-term stored data are plotted in graphs and the extend to which they affect the photovoltaic system is evaluated.
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Design of a photovoltaic power system three-person household in Ústi nad Orlicí area
Wohner, Marek ; Jandová, Kristýna (referee) ; Vaněk, Jiří (advisor)
The bachelor thesis deals with the theoretical analysis of individual concepts related to photovoltaics and the design of a photovoltaic power plant. At the beginning of the bachelor thesis we find the history of photovoltaics and an explanation of the photovoltaic phenomenon. Much emphasis is placed on the analysis of individual photovoltaic cells and batteries. In addition, the bachelor thesis describes photovoltaic systems and legislation concerning photovoltaics. The end of the bachelor thesis is devoted to the design of a photovoltaic power plant and the subsequent evaluation.
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Influence of small household appliances on economy of combined solar systems
Hosová, Žaneta ; Půčková, Helena (referee) ; Kotlík, Josef (advisor)
This Master’s thesis deals with the problems of small domestic appliances in solar systems. The theoretical part provides a description of solar thermal systems and solar photovoltaic systems, including the possibility of their combination. It adds options connecting the small household appliances in system of solar technology and economics of the washing process. The practical part evaluates the economy of operation small household appliances connected to the solar system.
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