|
|
Analysis and Verification of Operating Characteristics of Grid and Hybrid Inverters
Vrána, Michal ; Braciník,, Peter (referee) ; Dvorský, Emil (referee) ; Mastný, Petr (advisor)
The thesis is an annotated collection of articles focused on the field of verification of inverter operating characteristics and their impact on the operation of the distribution system. The operating characteristics are assessed with respect to the national requirements in the Czech Republic. Within the framework of the solution, articles were published in foreign impacted and peer-reviewed journals and indexed proceedings of foreign and domestic conferences. The main result of the dissertation is the design and implementation of a laboratory workplace for verification of operating characteristics. For the workstation, software equipment was designed and implemented for testing process automation of both, the physical workstation and the virtual testing. By reconfiguring the workstation, it is possible to create a facility for simulating and verifying the effect of autonomous functions on the distribution system within the framework of experimental installation in laboratory conditions or field testing.
|
|
|
Possibility of using alternative decentralized energy sources
Pitron, Jiří ; Pěcha, Jiří (referee) ; Mastný, Petr (advisor)
The thesis concerns of the possibility by using alternative decentralized sources of energy. The first chapter describes current energy situation in the Czech Republic and consideration of future electrical energy consumption and the coverage by the renewable sources. Another part of this chapter describes each types of renewable energy with their advantages and disadvantages related to the Czech Republic. In the second chapter are introduced inputs which are appropriate for the plan of energetic system. The following theoretical chapter deals with each types of alternative energy sources using renewable source including the possibility of the installation and plan for the building. These alternative sources are sorted out by the way of using renewable sources of energy. The theoretical-practical fourth chapter concerns of the heating by the heat pump. For the detailed description was chosen the heat pump which is currently denote as appropriate alternative source of heat in household. With appropriate plan, which the thesis deals with, is this alternative source considered as proper investment. In the last chapter was assembled programme for creating models of energetic flux and calculation for the plan of heating by the heating pump air/water. This model is taken for concrete buildings related to exact outdoor temperature from previous years in concrete locality. In the end was realized validation of the software with the real measurement in concrete building.
|
|
|
Optimization Models of Risk in Energy Systems
Tetour, Daniel ; Cabalka, Matouš (referee) ; Popela, Pavel (advisor)
The diploma thesis deals with mathematical modeling of the resource allocation problem in an energy system with respect to technical parameters of the used resources. The model includes random input variables affecting the amount of demand and constraints related to associated risks. The thesis addresses control of the operation of various types of boilers and also extends the system with a heat storage tank examining its impact on the behavior of the system and achieved results. The optimization model is based on a multi-period two-stage scenario model of stochastic programming and works with simulated data, which combines real data, statistically determined estimates, and the use of logistic regression. The implementation utilizes GAMS software. When comparing the achieved results with the current state, it was found that the heat storage tank has a positive effect on the function of the system as it allows for extended usage of the cheaper unregulated sources by storing surplus heat, and thus helps to reduce the overall costs of the system.
|
|
|
Control Processes in Energy Systems with Alternative Power Sources
Morávek, Jan ; Kolcun, Michal (referee) ; Braciník, Peter (referee) ; Mastný, Petr (advisor)
The dissertation is an publication summary focused on the field of management processes in renewable energy systems, mathematical models and optimization possibilities for large and small scale photovoltaic systems. The articles were published in foreign impacted and reviewd journals and indexed proceedings of foreign and domestic conferences. The main results of the dissertation are the design, configuration and realization of the hybrid energy system with subsequent optimization. Using the data from the laboratory system, a mathematical model was compiled and subsequently validated in the Matlab/Simulink environment for a hybrid energy system with accumulation. The options for power production optimization with photovoltaic sources are based on both operational measurements (for commercial applications) and on the analysis of power flow controllers to optimize the~energy balance (for small scale applications in private buildings).
|
|
| |
|
|
Introducing stochasticity into the energy system model Times-CZ - a reflection of a war-related extreme environment
Otruba, Šimon ; Rečka, Lukáš (advisor) ; Janda, Karel (referee)
This thesis introduces stochastic elements into the TIMES-CZ energy system model focusing on the impact of extreme events such as pandemic or recent war in Ukraine. The objective is to improve the model's precision in the face of these market uncertainties. Natural gas prices and European Union Allowance (EUA) prices, after a selection process, are represented as random variables allowing for probabilistic forecasting. These variables are derived from an analysis that combines model-based forecasts, which also include external predictions. The results of this comprehensive analysis are then integrated into the TIMES-CZ model. The correctness of these results is validated using sensitivity analysis, which evaluates the impact of results with uncertain parameters on the model's output. The findings highlight the importance of including uncertainty in energy systems modelling and could have implications for energy planning and decision-making in uncertain contexts. Keywords TIMES-CZ Model, Stochasticity, Energy System Modelling, Uncertainty Analysis, Sensitivity Analysis JEL Classification C12, C33, G21, L25, M31 Title Introducing stochasticity into the energy system model Times-CZ - a reflection of a war- related extreme environment
|
|
|
Optimization Models of Risk in Energy Systems
Tetour, Daniel ; Cabalka, Matouš (referee) ; Popela, Pavel (advisor)
The diploma thesis deals with mathematical modeling of the resource allocation problem in an energy system with respect to technical parameters of the used resources. The model includes random input variables affecting the amount of demand and constraints related to associated risks. The thesis addresses control of the operation of various types of boilers and also extends the system with a heat storage tank examining its impact on the behavior of the system and achieved results. The optimization model is based on a multi-period two-stage scenario model of stochastic programming and works with simulated data, which combines real data, statistically determined estimates, and the use of logistic regression. The implementation utilizes GAMS software. When comparing the achieved results with the current state, it was found that the heat storage tank has a positive effect on the function of the system as it allows for extended usage of the cheaper unregulated sources by storing surplus heat, and thus helps to reduce the overall costs of the system.
|
|
|
Control Processes in Energy Systems with Alternative Power Sources
Morávek, Jan ; Kolcun, Michal (referee) ; Braciník, Peter (referee) ; Mastný, Petr (advisor)
The dissertation is an publication summary focused on the field of management processes in renewable energy systems, mathematical models and optimization possibilities for large and small scale photovoltaic systems. The articles were published in foreign impacted and reviewd journals and indexed proceedings of foreign and domestic conferences. The main results of the dissertation are the design, configuration and realization of the hybrid energy system with subsequent optimization. Using the data from the laboratory system, a mathematical model was compiled and subsequently validated in the Matlab/Simulink environment for a hybrid energy system with accumulation. The options for power production optimization with photovoltaic sources are based on both operational measurements (for commercial applications) and on the analysis of power flow controllers to optimize the~energy balance (for small scale applications in private buildings).
|
|
|
Use of secondary heat ventilation air in multifunctional building
Dvořák, Jan ; Adamovský, Radomír (advisor) ; Neuberger, Pavel (referee)
This work deals with the theme of heat recovery from waste air and moisture recovery in residential areas. In a brief introduction, introduces the reader to various aspects of the energy system of choice due to the location and method of application equipment for heat recovery. In the following chapters is described theoretically transfer heat exchanger and determination exchanger efficiency, along with the search components including the basic distribution of each kind secondary heat recovery coils. Part of the theory is evaluating the effectiveness of the use of heat recovery equipment. The second part is solved draft multipurpose building consisting of a concert hall and the administrative section of the building. According to the resulting requirements for air-conditioning equipment has been selected with the described type of heat exchanger. Follow economic evaluation facility and the conclusion. The attachment is plan with a description of the location of equipment in the building.
|
|
| |
guest ::
