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Hosting Capacity of the Distribution Grids for Renewable Electricity Production
Koubek, Michal ; Topolánek, David (referee) ; Toman, Petr (advisor)
This thesis deals with the topic of hosting capacity of the distribution grids for renewable electricity production. The first part of the thesis focuses on describing the back effects to the distribution network and requests for connection. Furthermore, an overview of the most commonly connected renewable energy sources to the distribution system is provided. In the practical part of the thesis, a model of a real high-voltage network was created, in which connection requests were recorded. One of the requests was thoroughly assessed, and the impacts of the connected generation on the network were evaluated.
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Hardware-In-The-Loop Simulation Of A Distribution Network With An On-Load Tap Changer Controlled By An Intelligent Electronic Device Via Digital Communication
Jurák, Viktor
This paper deals with hardware-in-the-loop simulation of the distribution network, whichis equipped with the on-load tap changer on the HV / MV transformer. This tap changer in the simulationis controlled from a real physical external device - the multi-functional intelligent electronicdevice REX 640 from ABB. This device receives and processes the sampled measured values ofvoltages and currents. Based on these values, an instruction to switch the transformer tap is thengiven back into the simulation. All communication between the simulator and the external device isprovided using the IEC 61850 industrial communication protocol. The paper summarizes both thebenefits of hardware-in-the-loop simulations and the possibilities of using intelligent electronic devicesand data communication in distribution systems.
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Distribution system support by power management of battery systems in charging mode and charging systems for electric vehicles
Rodionov, Vladislav ; Mastný, Petr (referee) ; Drápela, Jiří (advisor)
The thesis focuses on the power management support of battery systems in charging mode and charging systems for electric vehicles in the LV network. The thesis includes an overview of the distribution network of the Czech Republic, means of voltage regulation and the existing legislative framework for the connection of charging systems. The thesis describes the methods of active and reactive power control depending on the voltage and frequency. The practical part focuses on the simulation of grid support at different penetration levels of BESS and EVC in MATLAB Simulink and the verification of the support function on a laboratory system. In the last part, the methods of implementing the control system for BESS and EVC operating in the LV grid are specified.
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Distributed generation support for voltage regulation by means of power control
Majer, Šimon ; Vrána, Michal (referee) ; Blahůšek, Radim (referee) ; Drápela, Jiří (advisor)
This thesis is focused on voltage regulation in low voltage distribution system. It describes power management methods using photovoltaic inverters. The thesis describes the working PQ space of the inverter and the regulation characteristics of the active and reactive power in dependence on the voltage. The practical part focuses on the simulation of specific PQU control settings on the test models created in PSCAD. The model is used as a basis for real measurement. Outputs obtained from measurement and simulation are validated in the text. The last part of the thesis identifies limits for connecting resources with and without support.
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Design and construction of double laboratory power supply
Klein, Miroslav ; Šebesta, Jiří (referee) ; Brančík, Lubomír (advisor)
This semester thesis deals with design of double laboratory DC power supply with adjustable voltage and current limitation. Power supply can work in two states. First state allows regulation of output voltage from 0V to 40V and current limitation from 0A to 3A. In second state the range of output voltage is from 0V to 18V and output current can be set from 0A to 6A. Both supplies are galvanically separated and can work independently, or can be combined. Whole power supply is digitally controlled by microcontroller.
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The design low noise linear power supply
Ondráš, Michal ; Steinbauer, Miloslav (referee) ; Roubal, Zdeněk (advisor)
This semester work describes the production of a power supply. It is linear source with voltage regulation and current regulation. The source has low output noise. The source is power supply for nuclear quadrupole resonance. This project describes NQR, linear source, noise, noise properties of electronic components and process for production of the power supply. The project describes select components with low noise and then influence on the electrics circuit and output noise. The text describes design the cooling system and calculation of the values.
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Design of triple laboratory power supply
Gerbel, Patrik ; Kubíček, Michal (referee) ; Brančík, Lubomír (advisor)
This semestral thesis deals with designing triple laboratory power supply. There are three outputs in the device. One of them is built with switching regulator LTM4605 and it‘s output voltage can be regulated in the range of 0 to 6 volts. Maximal output current is 5A. The rest is realized as linear with voltage regulated output of 0 to 30V and adjustable current limitattions in range of 0 to 3 A. Output parameters are registered by double microcontrollers and shown on two LCD displays.
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Electronic Subsystem of a Small Mobile Robot
Podolan, Luděk ; Jílek, Tomáš (referee) ; Žalud, Luděk (advisor)
The topic of this bachelor thesis is design and construction of a mobile robot with wheeled differential platform. The main goal was to design, implement and test an electronic sub-system for a small mobile robot. Each chapter firstly deals with theoretical aspects of relevant topics and after that describe the process of construction. The thesis shows various ways of construction of the robot with the process of selection of the optimal one. The main controlling part of the robot is the AVR microcontroller placed on the EvB4.3 development board. A simple menu was created on an LCD display for communication between the user and the robot. Battery management is controlled by an analogue to digital converter. The last two chapters focus on encoders and communication between the robot and a proximity sensor. Pictures of the robot are enclosed at the end of the thesis.
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