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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
291

Mobilní fotovoltaická elektrárna / Mobile photovoltaic power plant

Klíč, Tomáš January 2018 (has links)
This diploma thesis is divided into two parts, namely the theoretical and practical part. In the theoretical part, the issue is dismantled from the current state of electric power, share the production of individual sources, the market for photovoltaic and mobile photovoltaic systems through the description of the theory of solar radiation and all the necessary components to build the isolated photovoltaic power plant. The practical part deals with dimensioning, selection of suitable components and the actual one own design and implementation of a mobile photovoltaic power plant.
292

Hodnocení provozu malých fotovoltaických elektráren s připojením do sítě nn / Operational Evaluation of the Small Photovoltaic Power Plants Connected to the LV network

Černý, Jaroslav January 2010 (has links)
The objective of this thesis is to perform practical measurements of two small photovoltaic power plants, compare the received results with a theoretical calculation, and evaluate how the two differ from each other. Measured data are divided into three groups. The first group evaluates an overall electric power production in the individual months and compares it with the theoretical presumption that is instrumental to a return of investment calculation. The second group shows us a development of electric power production during characteristic days. We can compare how an ideal day from the FVE production point of view looks like, in other words a sunny and clear-sky day, with the opposite case when it is cloudy and raining all day long. Another extreme is a rapid growth or a performance drop, which can happen in a pho-tovoltaic power plant and a time period when this situation can arise. The third group contains statistic data from the electric power production. They are processed in the form of histograms and polygons of production that graphically illustrate production decomposition into the individual months. These data can be instrumental to a decision making about the form of purchase, whether it is economical for us to use the so called green bonus or not.
293

Optimalizace provozu solárních parků / Optimalization of solar park operation

Kašpařík, Petr January 2010 (has links)
This work deals with the comparison of photovoltaic technologies and optimization of Photovoltaic power plants using empirical models. The primary purpose of this work is to analyse current status of selected photovoltaic power plants in the Czech republic and to suggest possible means to increase their productivity. This analysis uses data measured by systems for direct management of these parks, and these data are compared with theoretical data calculated from measurement system Czech weather stations and PVGIS.
294

Využití fotovoltaických systémů v Off-grid aplikacích / Use of Photovoltaic Systems in Off-grid Applications

Straka, Michal January 2012 (has links)
This masters thesis deals with the use of off-grid photovoltaic systems. First we explain the problems associated with the power and energy potential of photovoltaic system components, design of photovoltaic systems for autonomous operation and the financial evaluation. The result of the masters thesis is to create an application used to design the island system in the whole output range (the smallest power systems to house systems application). The conclusion of the masters thesis is devoted to designing three type of projects from our application – a garden cottage, a family cottage and the house.
295

Návrh podnikatelského záměru: Fotovoltaická elektrárna / Business Plan Proposal: Photovoltaic Power Plant

Krutský, Jan January 2009 (has links)
This Master’s thesis´ topic is “Business Plan Proposal: Photovoltaic Power Plant” and it has been assigned at Brno University of Technology, Faculty of Business and Management. The target is to create business plan proposal based on real business case that would be actually used not only as summary of all the necessary information for the project owner but also as information source for potential investors and other stakeholders of the project. Except the above mentioned, thesis demonstrates the knowledge of the energetic sector’s environment, ability to implement the legislation, use particular managerial tools and to prepare the technical and economical valuation to make decision making easier and to catch the investors´ eyes. The project concerns construction and operation of the photovoltaic power plant in the Czech Republic.
296

Akumulace elektrické energie z obnovitelných zdrojů / Accumulation of electricity from renewable sources

Dědek, Dušan January 2008 (has links)
This work is specialized on problems accumulation electricity power from renewable sources and production electricity power from renewable sources for select object. First part describes renewable sources and their use in our conditions. Second part is specialized on accumulators specific for renewable sources. Third part compare to production electricity power from photovoltaic power station and windy power station and their combination for select object. Further accumulation these select sources. Final fourth part describe about their comparison from position how of technical so economic.
297

Akumulace elektrické energie z obnovitelných zdrojů / Accumulation of electricity from renewable sources

Špičák, Ladislav January 2009 (has links)
This diploma thesis is specialized on problems of electrical energy accumulation from renewable resources. This renewable resources used in Czech Republic are described in the first part. Next, in the second chapter is identification with principles of electrical energy accumulation. In the third part, there is a proposal of electrical energy accumulation system which makes a supply of electrical energy from photovoltaic system by the help of accumulation system in compressed air equally. In the final part, there is a total analysis of technical economic aspect for proposed system.
298

Akumulace energie z obnovitelných zdrojů energie / Power-accumulation from renewable energy sources

Kratochvíl, Tomáš January 2010 (has links)
The diploma thesis is focused on problem of accumulating electric energy from renewable resources. The first section describes renewable energy sources, which are possible to use in the Czech Republic and principles of accumulating electric energy. In the following section are suggested systems of accumulating energy to accumulators by compressed air and pumped storage power station. These systems are proposed for uniform power supply from photovoltaic power station to electric power network all day. In conclusion, the suggested systems are compared from economic-technical perspective.
299

Solární koncentrátorový systém s automatickým natáčením / Solar Concentrator System with Automatic Tracking System

Žák, Martin January 2017 (has links)
This master’s thesis is focused on current possibilities of solar energy utilization – especially on concentrating solar power systems – and their optimization using solar tracking systems to maximize energy gain. The thesis also deals with solar position algorithm and offers an Arduino based automatic dual axis solar tracker design which provides various solar devices the ability to pivot using stepper motors, DC motors or servos. The motion might be driven by calculated solar position or by actual illuminance.
300

Vliv akumulace na provoz distribuční sítě / The Effect of Accumulation on Distribution Grid Operation

Jestřáb, Tomáš January 2017 (has links)
This diploma thesis introduces the reader to the possible types of electric energy storage technologies, their comparisons and utilization. After its introduction, it follows the description of individual technologies and principles that are currently meaningful and useful in practice. The thesis continues with the part characterizing the ways of using the accumulation in the grid. However, the main points of this thesis include the analysis of the influence of the photovoltaic installation on the specified distribution grid operation at the low voltage level and the analysis of the influence on the grid with connected accumulation. Another important objective was the model for the calculation of steady-state, which was programmed on the basis of the theory supported by the principles of production from intermittent sources and the principle of accumulation function. The outputs of the model in the form of the calculated voltage ratios at the individual supply points and current flows at the distribution transformer point were used to evaluate the analyzes mentioned above. The courses of the calculated parameters are broken down by different scenarios (according to the period, the degree of integration of production and the accumulation or the power output of the production), graphically processed and compared from the point of view of voltage fluctuations and changes in the power (or current) balance of the supply transformer.

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