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DLMS security suite implementation
Kohout, David ; Sláčik, Ján (referee) ; Mlýnek, Petr (advisor)
This thesis is focused on smart meters cyber security using DLMS Security Suite standard. Security is more important every day and DLMS specifies multiple methods of authentication and message encryption which is defined in Security Suites. For message creation there are multiple possible formats that can be used. For a better understanding all formats are analysed and compared using a specific example. Main part of this work is about making a testing application called VUT DLMS Tester which is used for testing this standard for real usage in distribution network. Whole development is cooperated with distribution companies and smart meter manufacturers. Application also implements higher levels of security which DLMS specifies. This application is used for testing multiple scenarios regarding security impact on data volume.
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Energy meter with PLC communication
Szalbot, Michal ; Mlýnek, Petr (referee) ; Koutný, Martin (advisor)
Our thesis is about development of equipment, which combine two technology. First technology is wattmeter which is used to energy measurement and second is Power line communication. Wattmeter needs two variables for measurement, voltage and current. Voltage measurement is less difficult than measurement of current. Voltage can be reduce and measured by A/D converter. Current has to be transform to voltage and than can be measured same way. To do that we use current transformer. Than we design program for the microcontroller, involvement and PCB. Wattmeter is connect to PLC modem which has been chosen. Fusing this two technology we create wattmeter network. Next step was program which is used to network control and data collecting. This data are used to create charts in web application.
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Smart grids - smart grid for energy
Kapoun, Vladislav ; Mlýnek, Petr (referee) ; Mišurec, Jiří (advisor)
This bachelor thesis is aimed at the analysis and the description of Smart Grids within the field of power engeneering. It deals with Smart Grids´ general requirements and their practical application. Furthermore, it discusses Smart Grids´ security measures, and describes its components. It also draws up intelligent household, selects and theoretically applies components to pre-selected object. The bachelor thesis further encompasses a network simulation whose graphs show channel transmissivity among concentrators while data are simulated.
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Cascade model of power lines for PLC
Haluza, Tomáš ; Mlýnek, Petr (referee) ; Mišurec, Jiří (advisor)
This bachelor´s thesis deals with studies of power-line in terms of possibilities for using grid as a transmission medium for data transmission. Theoretical part is focused on PLC technology and the parameters of high-voltage lines. In very practical part the modeling of power-line by cascade parameters of two-port network is examined. Influence of va-rious changes in network topology are included in this thesis and also their influence on transfer function. The last part outlines the method of modeling PLC transmission chan-nel that is created as a FIR filter with finite impulse response.
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Remote data acquisition over the power lines
Neuschl, Martin ; Koutný, Martin (referee) ; Mlýnek, Petr (advisor)
The subject of this paper is „remote data acquisition over the power lines“. The first part is engaged in characteristics of power lines. The other part considers PLC technology, its properties and usage. Base on disturbance and noise in power grid is chosen optimal modulation technique and error handling for PLC. The next part describes options of authentication. It has been designed secure way of authentication for data collection over power lines and attack-resistance is considered as well. Practical purpose is dedicated to simulations and noise measuring during communication of narrowband PLC modems. It deals with long-term power grid testing and its influence on transmission rate between PLC modems and also with the influence on primary parameters of power grid. Packets are investigated during communication as well.
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Narrowband PLC modem
Novák, Pavel ; Koton, Jaroslav (referee) ; Mlýnek, Petr (advisor)
The theses is focused on the use of PLC technology. The aim of the thesis is creating device which communicates in a narrowband transmission frequency band. Transmission of communication between plc elements runs through the low voltage distribution network. The frequency and phase modulations are used in order to change the character of data signal. Transmitter and receiver parameters are subjects to the CENELEC standard. The theses gives more attention to the area of hardware build communication element rather than the area of programming.
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Monitoring of electric power quality in the distribution networks
Kostelník, Adam ; Mlýnek, Petr (referee) ; Mrákava, Petr (advisor)
Semester project explains the concept of electrical power quality, describes its characteristics and properties defined standards. Further deals with electrical power quality measurement and analyzers that are intended for. Subsequently it focuses on the use of data communication for measured data transmission between the analyzers and collecting points. The conclusion briefly describes the basic properties of the two analyzers selected for the implementation of practical measurements.
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Power Line Communication Simulator in Network Simulator-3
Kolář, Jan ; Fujdiak, Radek (referee) ; Mlýnek, Petr (advisor)
This thesis deals with the powerline communication focusing on the simulations of channel transfer functions. The introduction summarizes basic information about PLC followed by the analysis of the available PLC Software simulator (implemented in NS-3) and the analysis of implemented noises and interferences and its extensions. One chapter is devoted to possibilities of link capacity calculation. Within the thesis, various methods of calculation of primary parameters of transmission line were implemented and the simulator was compared with other freely available simulators. Subsequently, simulations were carried out focused on channel transfer functions in different topologies, on the impedance changes of branch, on the lengths of branch, and changes in the direct path between communicating nodes.
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Analysis and modeling of Power Line Communication
Mlýnek, Petr ; Orgoň, Miloš (referee) ; Pospíchal, Ladislav (referee) ; Mišurec, Jiří (advisor)
The dissertation thesis focuses on the analysis and modelling of power line communication. In first part of the thesis, a basic information of power line communication are described, primarily principle, advantage and disadvantage. The physical layer of the transmission and the fundament of modelling are described later. In the following section the objectives of the dissertation thesis are specified. Experimental verification of the created models and creating of indoor and outdoor models are one of the major goals of this work. These models approximate the real parameters of the power lines communication with sufficient precision. A detailed analysis of existing and current research in power line communication modeling, especially for the power line models, then follows. Based on this analysis a mathematical description of the models is specified and reference model for different scenarios is designed. The communication channel model, power line model and noise model are designed in own solution part. In this part the main goals, experimental verification of created models and designed of models for indoor and outdoor line were also realized. By merging of individual models, PLC communication system model with all parameters analyzed in detail arise. The analyzed parameters which were previously published, do not contain these parameters coherently. The last part of the thesis gives a summary of the results of these analyzes and discussion of simulation results.
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BPL modem
Chromý, David ; Mlýnek, Petr (referee) ; Musil, Petr (advisor)
This work deals with the issue of PLC with a focus on BPL technology (Broadbandover-power lines), which is explained in the theoretical part. The work describes in detailthe main components for PCB design with manufacturing and mounting process. Fur-thermore, the thesis provides instructions on how to establish communication betweenBPL modems and a description of individual functions. In conclusion, the procedureof measuring the noise intensity in the 230 V power line is described with the results.The output of the diploma thesis is the selection of components and the implementationof printed circuit boards for two BPL modems. These modems allow to measure SNR(signal to noise ratio) at physical speed.
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