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Systems for remote measurement in power engineering
Hudec, Lukáš ; Mlýnek, Petr (referee) ; Mišurec, Jiří (advisor)
The work deals with the measurement and management in power. Provides an introduction to the problems of remote meter reading, management, and describes the current situation in the field of modern technologies Smart metering and Smart grids. It also analyzed the issue of collection of networks and data collection from a large number of meters over a wide area. For the purpose of data transmission are described GPRS, PLC, DSL, ... Further, there are given options to streamline communication. This area is used hierarchical aggregation. Using k-means algorithm is a program designed to calculate the number of concentrators and their location in the group of meters. The finished program is written in Java. It has a graphical interface and shows how the calculation is conducted. To verify the results of the optimization program is given simulation model in OPNET Modeler tool. Audited results are described in the conclusion and can deduce that using the optimization program is to streamline communications.
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Implementation of computer models of lines for PLC
Mrákava, Petr ; Mlýnek, Petr (referee) ; Mišurec, Jiří (advisor)
The subject of this thesis is to become familiar with the different parameters describing the lines, and the possibility of modeling data and power models. The thesis also outlined the difference in the mechanical structure of different types of cables. The practical part focuses only on the power cables and measure their basic parameters. Then is created computer model which describes the behavior of cable lines at higher frequencies than are primarily intended. The final section is an experimental network created by the PLC for remote reading of electricity meters, and it measured different transmission properties.
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Smart Home
Konstantinov, Glib ; Musil, Petr (referee) ; Mlýnek, Petr (advisor)
The bachelor’s thesis deals with the analysis of intelligent devices and the possibilities of their usage in the household. Furthermore, the possibilities of using electricity from a photovoltaic power station and their comparison in terms of financial savings and efficiency of use are described. Moreover, in the theoretical part, a smart metering is described and methods of monitoring electricity consumption from classic electricity meters are presented. The practical part focuses on measuring the consumption of electricity by home appliances using a smart plug with the aim of their categorization, measuring the quality of electricity using a quality monitor MEg44PAN. The output of the bachelor thesis is the visualization of ways how intelligent elements can be implemented into existing buildings, smart homes and various combinations of appliances and resources.
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Narrowband data transmission over the power lines
Valenta, Jaroslav ; Mišurec, Jiří (referee) ; Mlýnek, Petr (advisor)
This bachelor´s thesis is focused on narrowband data transmission over power lines. At first are described possibilities of narrowband data transmission over power lines, next the type of noises and then thesis deals with parameters of communication channel. In this thesis are described too modulation, error corection and data encryption for reliable communication. In the last part of thesis are realized practical measuring in laboratory workplace. The influence of data communication on primary function of power lines are tested. In the end are realized measuring of noise influence on data communication.
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Computer models of telecommunication lines
Přívozník, Tomáš ; Mlýnek, Petr (referee) ; Mišurec, Jiří (advisor)
The Bachelor‘s thesis named „Computer models of telecommunication lines“ is in introduction aimed to description characteristic quantity of telecommunication lines. Next part describes models which simulates parameters of telecommunication lines in depend on frequency of carried signals. Following chapter describes proposal constants for UTP cabel of category 5e. Constants are used in model BT#0. In the end of this thesis is summary of reached results.
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PLC system for Smart Metering
Bijotová, Kateřina ; Sláčik, Ján (referee) ; Mlýnek, Petr (advisor)
This thesis deals with PLC communication, presents pros and cons of this technology. The thesis describes several basic standards of the narrowband communication and broadband HomePlug AV2 standard. It groups the technology according to frequency band. Also, it brings summary of commercial products and development kits which are using PLC technology. The thesis contains the description of network testing to RFC 2544 recommendation and its application onto narrowband Linksys PLEK500 modems using NetBlazer tester which took place in laboratory of Brno University of Technology’s Department of Telecommunications. The same PLC modems are used in a second series of experimental measurements in home environment. This thesis also deals with comparison of narrowband PLC standards PRIME and G3 whilst exposed to different transmission conditions as defined by pre-established measurement scenarios. Said comparison was attained by measurements using Atmel’s multi-carrier PLC kit SAM4CP16C-EK. In the closing section of the thesis the results obtained by said measurements are consulted with conclusions provided by contemporary PLC-oriented publications.
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Influence of physical parameters and age of power lines on PCL/BPL performance and reliability
Janás, Jan ; Mlýnek, Petr (referee) ; Benešl, Lukáš (advisor)
With the increasing demands on data transmission, other ways are being sought than standard data transmission via conventional data cables. One of these ways is communication over power lines - PLC or BPL technology. This method of communication is widely used in households, energy, industry and other fields where it is used for data collection, communication, or control of various devices. Before considering the use of BPL technology, it is first necessary to evaluate the considered power line to see if it is suitable and technically competent for this purpose.
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Design and experimental verification of MESH type radio network for non-licensed bands
Váňa, Martin ; Mlýnek, Petr (referee) ; Fujdiak, Radek (advisor)
This thesis is focused on problematic of designing a MESH network with use of IQRF technology. Basic techniques in radio transmission are presented in the introduction part, followed by technologies used in the radio environment. The second chapter presents IQRF, its base parameters and devices which can be used in its network, including cloud. The third part deals with the designing of topology and the methodology of the experimental verification. The last chapter stresses the measurement of parameters of IQRF network in various conditions and arrangements.
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Cyber security for power engineering
Sedláková, Dáša ; Kohout, David (referee) ; Mlýnek, Petr (advisor)
Due to the IT and OT networks convergence, industrial systems are becoming vulnerable to different forms of security threats including rapidly growing cyber-attacks. Thesis is focused on an analysis of security recommendations in IEC 62351, vulnerability testing of industrial communication protocols (e.g., IEC 61850) and mitigations proposal. An ATT&CK framework for ICS was chosen to become a methodology base for vulnerability testing. ATT&CK tactics and techniques were used to practically test vulnerability scans, SMV time synchronization, GOOSE spoofing, MMS Man in the Middle and ICMP Flood attacks. Attacks tested were evaluated with a risk analysis. Subsequently, mitigation measures were proposed on several levels (OT, IT, perimeter and physical level).
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