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Evaluation of advantages and disadvantages of aircraft automatic systems
Vrána, Michal ; Koštial, Rostislav (referee) ; Horpatzká, Michaela (advisor)
This bachelor’s thesis deals with civil airplane automatic systems. The first part analyses historical development of flight control systems and automatic system together with philosophy, which is implemented in modern airliners. In the next part, we evaluate advantages and disadvantages together with list and description of modern avionic systems, which participate on automatic flight. In the last part, selected airplane incidents and accidents are analysed, focusing on influence of automation with incidental human factor.
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Design of wind turbine regulator
Kowalczyk, Wiktor ; Vrána, Michal (referee) ; Morávek, Jan (advisor)
The bachelor thesis deals with charge control of a lead acid battery driven by 300 W wind turbine. The thesis is divided into four parts. First deals with the issue of lead battery charge controllers and the definition of a regulator for a wind turbine with permanent magnet synchronous generator, including a description of the regulated system elements. The second part deals with measurments done on the given system. Third part describes the design, algorithms and regulator programming and the last part describes construction and testing of a built-in controller.
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Implementation of control algorithm in application with several accumulation systems
Klusáček, Jan ; Morávek, Jan (referee) ; Collin, Adam (referee) ; Vrána, Michal (advisor)
Rozptýlená výroba elektrické energie využívající obnovitelné zdroje, jako je sluneční energie, přispívá ke snížení emisí skleníkových plynů. Z hlediska provozu distribuční soustavy je také výhodné, aby energie byla primárně spotřebována v místě výroby. To je částečně možné přizpůsobením spotřeby, ale především využitím akumulačních systémů. V této práci je představen hybridní systém složený z fotovoltaické elektrárny, akumulátoru elektrické energie a akumulátoru tepelné energie. Výběr a parametry všech částí hybridního systému jsou popsány v práci. Akumulátor elektrické energie je navržen a sestaven z LiNiMnCoO2 článků a řídícího systému zajišťujícího bezpečný provoz. Řídicí systém akumulátoru (BMS) zajistí odpojení baterie, pokud je překročen některý z provozních parametrů baterie. Návrh baterie i sestavy je popsán v práci. Akumulátor tepelné energie sestává z výkonového spínače a nádrže na teplou vodu s topnou patronou pro odporový ohřev vody. Na základě rešerše komerčně používaných zařízení pro regulaci příkonu byly definovány jejich nedostatky a na základě nich bylo navrženo optimální řešení. Řešení spočívá v použití komerčního polovodičového spínacího prvku. Pro tento výkonový spínací prvek byla vytvořena zpětnovazební řídící smyčka s regulátorem výkonu, který byl implementován v prostředí softwaru LabVIEW. V práci je také uveden postup návrhu chladiče spínacího prvku a LCL filtru, který je klíčový pro splnění požadavků elektromagnetické kompatibility. V druhé části práce je popsán návrh nadřazeného řídícího algoritmu, jehož úkolem je řídit výkonové toky v hybridním systému tak, aby byly splněny požadavky definované jak uživatelem, tak i okamžitým stavem akumulátorů. Algoritmus byl implementován v prostředí LabVIEW. Funkčnost celého systému byla ověřena měřením v laboratorních podmínkách. Z výsledků plyne, že nadřazený řídící algoritmus funguje správně. Řídící smyčka tepelného akumulátoru je stabilní a reguluje zátěž na požadovanou hodnotu. Přidanou hodnotou je kratší reakční doba na změnu toku výkonu oproti hybridnímu měniči a díky tomu dochází k minimalizaci přetoků elektrické energie do distribuční sítě. Na práci je možné navázat rozšířením stávajícího algoritmu o možnost řízení/ovládání více typů akumulačních jednotek a generátorů nebo implementováním odlišných strategií řízení.
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Concept of smart home energy monitoring and management
Kolouch, Petr ; Wasserbauer, Vojtěch (referee) ; Vrána, Michal (advisor)
This bachelor thesis deals with smart metering of home. The introduction of the thesis deals with the approach of this issue. It then explains the principle of smart socket operation and the possibility of linking smart sockets with renewable sources. In the next part of the thesis there is a thorough search of existing smart systems in the Czech Republic and abroad. In the practical part, 3 commercial smart sockets were measured and evaluated. The last part is the creation of the concept of smart socket-based on microchip ADE7753. Subsequently, the implementation of the measuring device is detaily described.
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Information System Assessment and Proposal for ICT Modification
Vrána, Michal ; Rašková, Kateřina (referee) ; Koch, Miloš (advisor)
The information system currently holds an essential role. Thus, it is necessary to keep up to date and fully compliant business needs. This thesis focuses on the comprehensive analysis of a selected information system. Its findings will contribute to finding appropriate solutions for improvement. It also aims to optimize the information system to perfectly cover the demands that are placed upon it.
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Control and monitoring of a distributed energy generation systems based on renewable sources with storage system
Smugala, Ondrej ; Paar, Martin (referee) ; Vrána, Michal (advisor)
The diploma thesis is dealing with possible approaches to control distributed energy resources and storage systems. One of these approaches is a virtual power plant and its concept is described in the first part of the thesis. The virtual power plant is a controlled system of distributed energy resources, storage systems and controllable loads interconnected via communication network, that can act as a conventional power plant. The theoretical part contains a survey of control system's topologies, a brief summary of available communication infrastructures and standards. The second part of the thesis is focused on the description of operation and control of hybrid system that represents an inseparable component of virtual power plant. A Matlab Simulink model was created for this purpose. A simulation of hybrid inverter's step response is realised to test the operation of the hybrid system and it is compared with the real measurements in the laboratory. A comparison of control approaches of hybrid system implemented on the basis of measurements is also included in this thesis and was published in the scientific paper attached in the appendix.
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Heat pump in cooperation with PV for family house
Drašar, Vojtěch ; Vrána, Michal (referee) ; Mastný, Petr (advisor)
The bachelor thesis deals with the design of a heat pump in cooperation with a photovoltaic system for a family house. The theoretical part describes the principles of the heat pump and the photovoltaic system. The thesis presents the methods of operation of the heat pump, the principles of building cooling, the connection of the PV system to the grid, or the methods of storing excess energy. In the practical part, the consumption of a typical family house has been determined by means of typical supply diagrams. The consumption is based on hourly statistical values for the year 2021. From the obtained values a pump was designed. Another objective of the work was the placement of photovoltaic panels on the roof. The power plant is considered as a hybrid, in order to maximize the consumption of the energy produced and the use of energy at the point of generation. For this, a battery system was also designed. The work includes an energy and economic evaluation, including the payback of the combination. For the economic evaluation, a subsidy from the New Green Savings 2021+ program was considered. The proposed solution has applications in both renovation and new construction, where the emphasis is on minimizing air pollutants and also the use of ecological resources.
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Concept of smart home energy monitoring and management
Kolouch, Petr ; Wasserbauer, Vojtěch (referee) ; Vrána, Michal (advisor)
This bachelor thesis deals with smart-metering of home. The introduction of the thesis deals with the approach of this issue. It then explains the principle of smart socket operation and the possibility of linking smart sockets with renewable sources. In the next part of the thesis there is a thorough search of existing smart systems in the Czech Republic and abroad. In the practical part, 3 commercial smart sockets were measured and evaluated. The last part is the creation of the concept of smart socket-based on microchip ADE7753. Subsequently, the implementation of the measuring device is detaily described.
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Potential Production of Electric Energy by Photovoltaic Panel and Tiles in Urban Area
Dvořáček, Jan ; Vrána, Michal (referee) ; Paar, Martin (advisor)
The bachelor's thesis deals with possible form of installation photovoltaic power plant on building, shading analysis and impaly possible way of calculation potential production of elektrical energy. In thesis is describe basic division and diferent methods of instalation photovoltaic systems. The following charter describing source of shading, shading analysis and effect of fading on photovoltaic moduls. The thesis include different way of calcuation potential production of elektrical energy by photovoltaic power plant. The practical part deals with the analysis of a selected area and the calculation of potential electrical energy using photovoltaic modules and photovoltaic roof tiles with chosen calculation method.
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