National Repository of Grey Literature 88 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Simulator of SCADA protocols
Bohačík, Antonín ; Mlýnek, Petr (referee) ; Blažek, Petr (advisor)
This work is focused on creation of fully functional communication generator of IEC 60870-5-104 protocol. The theoretical part explains in detail the basic principles, properties and possibilities of communication standards DNP3, IEC 60870 and IEC 61850. The next part is focused on the analysis of communication and implementation of this communication in the PQ MEg44PAN device. The last part deals with the configuration of Raspberry Pi 3 devices and the communication emulation of the IEC 60870-5-104 protocol. All programs were written and tested using the Clion development environment.
DLMS/COSEM load generator
Kohout, David ; Mlýnek, Petr (referee) ; Lieskovan, Tomáš (advisor)
This work is focused on Smart Metering, specifically the DLMS/COSEM specification. The paper describes most important parts of the standard and its application in smart grids. At first the DLMS protocol is examined. It is responsible for everything related in communication between clients and servers. Next described think is object model COSEM and its objects called OBIS. It shows how can we reference to these objects. In the second part – Traffic analyser are shown options of analysis of DLMS messages. This is after used for monitoring purposes. There is also described network topology including laboratory equipment. All devices were used for developing and testing the load generator of DLMS messages. App, which was created for this work is then described. The paper also assesses found problems in security and implementation of DLMS protocol.
Smart Metering system
Gregor, Filip ; Pokorný, Jiří (referee) ; Mlýnek, Petr (advisor)
The thesis deals with a PLC technology. In the theoretical part a principle of PLC functionality and its advantages and disadvantages were described. In the experimental part methodology of point-to-point testing with BPL modems was designed. In addition extensive measurement according to point-to-point methodology for topology with and without repeater in laboratory was realized. Impact of repeater on transmission parameters was tested according to RCF 2544, RFC 6349 recommendation and according to methodology of TCP Throughput with the aid of Net Blazer testers and iPerf tool. The results shows that topology with repeater decreases throughput approximately 50 % and increases Round trip time (RTT) more than twice compared to topology without repeater. In the last part a laboratory task with Smart Metering system and BPL modems was designed.
Modeling and simulation of PLC in Network Simulator-3 for Smart Metering
Petrůj, Jakub ; Sláčik, Ján (referee) ; Mlýnek, Petr (advisor)
The diploma thesis deals with analysis and modeling of power line communication using NS-3. The introduction part summarizes basic information about PLC technology, distribution grids, and broadband standards. This is followed by the analysis of the transmission line and modulation method. Furthermore, the simulation tool and possibilities of its extension are described. The influence of different cross-section and type of line on channel capacity is examined in the practical part of this paper. The influence of repeaters on bitrate is examined as well. The medium-voltage line was implemented and further scenarios dealing with bitrate or optimal level of noise. The focus of the last part is to find the repeaters on the path and to determine the capacity and bitrate on the path of the large topology.
Application for operation of measuring devices in power engineering
Ševčík, Radek ; Mlýnek, Petr (referee) ; Krajsa, Ondřej (advisor)
This thesis is focused on application development with ARM processor architecture and Linux operating system. It uses cloud hosting services to build, test and deploy applications with container-based virtualization. The application communicates with smart meters on serial buses. It stores measurements in a database. It provides access to devices and measurements in internet network.
Methodology for PLC evaluation in Smart Metering
Rusz, Martin ; Sláčik, Ján (referee) ; Mlýnek, Petr (advisor)
The aim of this work is to acquire basic knowledge about PLC technology and to make a set of measurements focusing on the main parameters of this technology as well as to perform a set of short-term measurements of PLC communication in Smart Metering systems and to design a methodology for testing two real systems. Measurements were made in laboratory conditions on prepared tasks that covered all types of technology, both broadband and narrowband with one or more carriers. In addition, a methodology for testing PLC communications in Smart Metering systems was developed, which was applied to two systems using different technologies. On the basis of the results achieved, it was decided which of the two systems is more suitable for real use according to the methodology and set of short-term measurements.
Universal communication unit
Ružička, Michal ; Mlýnek, Petr (referee) ; Sláčik, Ján (advisor)
This bachelor thesis is going to deal with communication over the power network. Aim of this project is to clarify this issue and consequently to use the acquired knowledge for desingning own communication unit. The basic parameters of power network which influence this type of communication are being described in this thesis. The concept of universal communication unit is created. Pheripheral solutions are chosen for this concept and the given device will be made of them. The custom communication unit is created on this basis. The funkcionality of this unit is tested in the work.
Intelligent system for remote data collection with PLC
Benešl, Lukáš ; Sláčik, Ján (referee) ; Mlýnek, Petr (advisor)
Bachelor thesis deals with PowerLine Communication (PLC), analyzes its advantages and disadvantages of this technology. Shows the frequency division according to the frequency range in which they work. The work includes a methodology of PLC communications testing according to Request For Comments (RFC) 1242 and RFC 2544 standards. Tests of the individual modems were measured in the household on a real network. All modems measured the same topology, and the results were appropriately processed in the form of well-arranged tables and charts. In conclusion, the individual conclusions from the measurements are always discussed. For the measurement of narrowband PLCs with multiple carriers on PRIME and G3 standards, the SAM4CP16C-EK development kit from Atmel was used. Narrowband modems, with single carrier, are represented by the PLC MT49R model manufactured by ModemTec. For broadband modems, the HomePlug AV2 standard was selected in comparison with HomePlug AV. Within the HomePlug AV2, the I2SE PLC Stamp 1200 micro EVK and Linksys PLEK500 development kit were used. For the lower standard of HomePlug AV, PLC was used by COMFAST.
Identification of Device Availability in Technological Networks
Vodehnal, Stanislav ; Mlýnek, Petr (referee) ; Škorpil, Vladislav (advisor)
This diploma thesis deals with the monitoring of network elements of technological networks and distribution systems. There are described reasons why and what kind of values we want to monitor. Three monitoring systems are then selected, described their properties and functions. Based on their merits, one system for deploying the test environment is selected. The practical part is the configuration of the selected system and its subsequent deployment to the network.
Public Key Cryptography protocol
Holiš, Michal ; Koutný, Martin (referee) ; Mlýnek, Petr (advisor)
This thesis deals with the measurement of power quality and cryptographic security of measured data.

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