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Implementation of automatic controls of electrical signals for the monitoring system of the Temelín Nuclear Power Plant
Mareček, Michal ; Novotný, Pavel (referee) ; Drápela, Jiří (advisor)
This bachelor's thesis deals with individual electrical devices for self-consumption, focusing on production blocks of the nuclear power plant Temelín, which are continuously monitored by the superior electrical monitoring system NEMES. A key element is the description of the areas of power output and self-consumption of the electrical blocks of the power plant, including the NEMES system, necessary for the design of automatic checks of the measured electrical signals reliability. Knowledge of the device concept and operating modes is crucial to the successful implementation of NEMES system signal checks in logical links and in view of deviations from the band of operating values. The subject of the thesis is to propose limits for all main electrical equipment together with blocking conditions for performing automatic checks of the reliability of the monitored signals by the NEMES system, which will be of great benefit to the end user - the operator of the Temelín nuclear power plant.
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Simulation model of MV network for automatic compliance simulation
Michalica, Tomáš ; Drápela, Jiří (referee) ; Dvořáček, Jiří (advisor)
This bachelor thesis deals with the creation of a numerical simulator of the HV system and the subsequent testing of the requirements for the production modules using PSCAD. The theoretical part of the thesis will first describe the HV network and its elements, then all the requirements that the production modules must meet in order to connect to the network will be discussed in detail. The end of the theoretical part will focus on the describtion of the tests that will be used to test the requirements. The practical part consists of the design and creation of the actual model of the high voltage system in PSCAD. The conclusion of the bachelor thesis will be the evaluation of the measurement results and the comparison of the measured values with the expected values.
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PV power plant project - category A1/A2
Pacalaj, Timotej ; Drápela, Jiří (referee) ; Morávek, Jan (advisor)
This thesis deals with the design of a category A1/A2 photovoltaic system for a specific building. The aim was to meet the requirements of the investor and the energy needs of the building. The thesis includes a research of PV connection requirements (PPDS-4, RfG), a review of available technologies and components, and system design using PVSOL software. The work also includes the production of project-level documentation for implementation, including a technical report, a single-pole schematic and a situation drawing. In addition to the technical aspects, an economic evaluation of the project is carried out in the thesis, providing the investor with an overview of the return on investment and financial efficiency of the PV plant. As a result, a comprehensive proposal for the implementation of a category A1/A2 PV plant is presented, taking into account both technical and economic aspects.
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Technical-economic framework for the integration of individual and community electricity generating plants
Vaculík, Tomáš ; Radil, Lukáš (referee) ; Drápela, Jiří (advisor)
In conection with current energy situation, efforts to achieve energy self-sufficiency are increasing in the Czech Republic and the rest of the Europe. Renewable energy sources can already be used within households. However, not everyone has the opportunity to purchase and operate such a factory. The solution to these problems may bet he increasingly discussed community energy, which is becoming more popular in the Czech Republic in connection with changing legislation and financial motivation in the form of various grants and subsides. The purpose of this work is to create a summary of the most important information of the technical and economic framework and subsequent creation of an easily modifiable and parameterized model of energy communities, which will show the technical properties of individual connections, such as power losses or the influence of metrics on the resulting values of measured energy.
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Aggregation and propagation of disturbances in the transmission system
Šedivý, Tomáš ; Rajský,, František (referee) ; Drápela, Jiří (advisor)
This thesis is devoted to the analysis and simulation of disturbance phenomena in the transmission system of the Czech Republic with emphasis on harmonic voltage distortion. A simulation model was developed in PSCAD environment, which allows to study the propagation of harmonic components in a congested system with multiple interconnected substations under different operating scenarios. The simulation results provide a deeper understanding of the aspects affecting the propagation of mainly harmonics in the network and lead to suggestions on how to effectively analyze the propagation of disturbances on a larger scale network.
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Winding diagnostics using surge test
Vojtěch, Pavel ; Šlezingr, Jan (referee) ; Drápela, Jiří (advisor)
Master‘s Thesis deal with analysis given to diagnostic method plus her applicability to failure detection electrical machine plus apparatus in different phases their live. A further realization physical model with subtransient generátor PSG204A 4kV, for teach – in disorder on single – layer air coil plus stator winding induction motor inclusive evaluation results test.
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Voltage magnitude deviations in a low-voltage distribution network due to increase in impedance of Y-connected load node to ground and unbalanced load
Blažek, Ondřej ; Paar, Martin (referee) ; Drápela, Jiří (advisor)
This work deals with the issue of an unbalanced power load of a three-phase main load and the associated network load of a PEN conductor. The introduction discusses the various types of systems where the distribution networks are implemented. Followed by the description of network segments causing issues discussed in this paper. The theoretical part discusses the possible operating conditions which lead to balancing the flow of neutral current, also shows the relation of the size of countervailing power charges and the form of the network load. There are also hints of possible risks that the mentioned situations may cause to the network operation in terms of function and safety. The practical part deals with the mathematical simulation model created in MATLAB. There are simulations based on which there is a description of the network behavior for the cases of induced adverse factors. The conclusion summarizes the most important results and findings produced by the simulations.
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Dynamic Compensation of Reactive Power
Horenský, Martin ; Topolánek, David (referee) ; Drápela, Jiří (advisor)
This master’s thesis is focusing on compensation of reactive power, especially on creating demonstrative model of static var compensation unit (SVC). Main topic of thesis is to apply this device for fast balancing dynamic conversions of recieved reactive power. In theoretical part is described suitable method for determination of instantaneous power. Next, there is basic description of all means used for compensation of reactive power and detailed description of the SVC compensator. Practical part includes design of compensation unit and control program in LabVIEW. The pq theory is implemented for detection instantaneous power. The results of validating functionality of compensator are presented in the last part of thesis.
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Voltage profile regulation in LV distribution systems by means of OLTC equipped distribution transformer and series transformers based on distributed monitoring data
Hála, Tomáš ; Topolánek, David (referee) ; Drápela, Jiří (advisor)
This diploma thesis discusses two major topics. The first one is the control size of the voltage in LV networks in regard to the increase in distributed generation concered to renewable energy sources. The study contains a review focused on the current state of low voltagegrid followed by a proposal for the solution of the oncoming state. The solution is identified as a deploying OLTC distribution transformer. In the case of more complex topology is deployed a series voltage transformer. Both methods are part of the Smart Grid. The thesis also analyzes the issue of the data measurement and data transmission. The second part of the thesis consists of the description of selected control strategies and their simulations. The design of individual system elements in the PSCAD is described. From these elements, a test network was constructed and tested the individual simulation scenarios.
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A multi-source power station switch- and control-boards digitization project
Fiala, Martin ; Bátora, Branislav (referee) ; Drápela, Jiří (advisor)
This bachelor´s thesis deals with comprehensive proposal and reconstruction of switchgears for source power station on Department of Electrical Power Engineering with controlled rotating and static power sources, that can be managed remotely using a programmable logic controller via the communication link. Part work also description of the control system and all the necessary parts for reconstruction. At last this thesis deals with the problem, which is linked to the deployment of automation in general, including the negative aspects, describes the problem of industrial communication systems along with the most used fieldbus that is used in the implementation of automated solutions.
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