|
|
Electric meter simulator with DLMS protocol
Tsymbal, Kateryna ; Gerlich, Tomáš (referee) ; Lieskovan, Tomáš (advisor)
This bachelor thesis is focused on getting acquainted with the DLMS/COSEM protocol and its functions. Furthermore, the Java programming language and the Raspberry Pi minicomputer are briefly introduced. The DLMS/COSEM protocol is used to simulate measurements using a smart meter, which ensures communication between the meter simulator and the concentrator. Communication provided by the DLMS/COSEM protocol is widely used in smart grids. The first part of the thesis discusses important information about energy networks and their relationship with smart meters, the importance of smart meters in modern networks and the role of smart networks, which are used for effective energy measurement in a particular area (e.g. for measuring electricity). Data measured in smart grids can be easily analyzed and used to make consumption more effective. The first part also mentions important information about the DLMS/COSEM protocol, the Java programming language and the Raspberry Pi minicomputer. In the second part of the thesis, a test environment is created for testing the smart meter simulator, which communicates using the DLMS/COSEM protocol with the concentrator and transmits the measured values to it. Measured values are manually defined for testing purposes using code changes in the Eclipse IDE. The aim of the work was to create a smart meter simulator that lists predefined values and passes them to the concentrator, which was achieved using the Gurux.DLMS library. Finally, an analysis of this communication was performed using Wireshark. This bachelor thesis is useful for a simple understanding of the DLMS/COSEM protocol and its use in smart grids.
|
|
|
Secure reading of smart meters
Chaloupková, Denisa ; Mlýnek, Petr (referee) ; Kohout, David (advisor)
The work deals with the implementation of the secure push mode of the DLMS standard. It introduces the DLMS/COSEM standard, contains a theory for message security and describes how push works and its attributes. The Gurux library in Java is used and the example gurux.dlms.push.listener is modified. The Raspberry Pi platform is used as the server. Wireshark and the Gurux DLMS Translator available in Gurux GXDLMSDirector were used to verify security of a push message. Subsequently, push messages are compared in terms of their size according to the type of security used. The larger the content of the data sent in the message, the smaller the additional data needed to secure the messages in proportion to the total volume.
|
|
|
Fuzzer Based on Genetic Programming
Závada, Tomáš ; Gerlich, Tomáš (referee) ; Ilgner, Petr (advisor)
The thesis is focused on testing, discusses its various approaches and more specifically focuses on the automated testing technique called fuzzing. It discusses its process, advantages, disadvantages and then also some of its possible improvements. Furthermore, the work is focused specifically on improving the process of fuzzing techniques using genetic algorithms. Genetic algorithms help create more appropriate test inputs, saving time during testing process while achieving appropriate results. A server using the DLMS/COSEM standard was chosen as the testing target. The thesis also introduces the DLMS protocol, which provides communication between clients and servers, and other essentials falling under the COSEM specification. Then the assembly of a test network, containing a server and a client, which use the mentioned standard for communication, is described. The thesis also elaborates a solution proposal for how the connection of the testing tool to the network could look like. Finally, the implementation of a fuzzer using the process of genetic algorithms to generate test data is also included.
|
|
|
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.
|
|
|
DLMS concentrator simulator
Buš, Ondřej ; Šilhavý, Pavel (referee) ; Lieskovan, Tomáš (advisor)
This work is focused on a field of smart metering and data concentrators. The first part of this paper describes the DLMS/COSEM specification. The first section contains DLMS protocol specification, the process of communication between devices and services that allows data communication. COSEM classes and objects can be found in the second section. These objects are used to access a specific data stored inside smart meters. Lastly, there is an section that is focused on OBIS objects which are used for addressing. In the second part, the concentrator's basic functionalities are described. These functionalities include device management and configuration file storage. The last part then focuses on a web server. The web server allows a user to manage the concentrator by adding, editing and removing connected smart meters.
|
|
| |
|
|
Analysis of distributed control protocols for indistrial applications
Horych, Vladimír ; Zezula, Radek (referee) ; Koutný, Martin (advisor)
This master's thesis deals with distributed control protocols for industrial applications. It explains term distributed control system, control protocol and it is dealing with properties, frame structures and ways of communication within CAN, Modbus, IEC60870-5-101 and DLMS protocols. This thesis includes informations, which are in most cases difficult to find. Second part of the thesis is dedicated to education system. This part is contained by information about protocols and their layers based on ISO/OSI model, pictures of structure of messages, knowledge test and an application based on JavaScript language. This JavaScript application emulates behavior of workstations, which are using communication based on IEC 60870-5-101 protocol. This application can set various conditions for influence of message transfer. These conditions are setting way of message transfer, data availability, filling of workstation’s buffer or intentional damage of message's content. It also contains a large amount of context help, activated after moving mouse cursor over most of application's elements. Even visitor without great knowledge of distributed control systems should understand how this protocol works, thanks to these context help and messages printed in lower part of the application. The conclusion of this work is aimed to positive and negative features and comparison of mentioned control protocols.
|
|
|
Smart Metering demonstration demo
Gregor, Filip ; Musil, Petr (referee) ; Mlýnek, Petr (advisor)
The thesis deals with PLC technology and issues with Smart Metering. In the theoretical part, a principle of technology's functionality and its advantages and disadvantages were described. In the experimental part methodology of data concentrator and electric meters was designed. In addition, extensive testing set according to capturing of DLMS communication, link quality influencing, reading registers of meters were realized. In the second experimental part limits of communications between broadband BPL modems were detected by the power line communication hardware channel emulator. Measurement of throughput, latency, frame loss passed off according to RCF 2544, RFC 6349 recommendation and according to the methodology of TCP Throughput In the last part, two laboratory exercises were created, first one deals with Smart Metering system and communication between the data concentrator and electric meters and the second one deals with communication among broadband BPL modems not only for Smart Metering purposes.
|
|
|
Smart Home - library for data acquisition
Tomiczek, Roman ; Sláčik, Ján (referee) ; Mlýnek, Petr (advisor)
The diploma thesis deals with the development of a software library for aggregating data from electricity meters and sending data to a central station. The most used protocols in smart grids are described. The work deals in more detail with the most important parts of the DLMS/COSEM standard. The DLMS protocol is described, which ensures communication between clients and servers. Next, the COSEM object model is described, which specifies object modeling, for access to measuring devices, and the OBIS system, which determines the identification of data objects. The Gurux library, which specializes in intelligent meter readings, is also described. The results of the work describe the implementation and testing of a software library for aggregation of data from servers using the DLMS/COSEM protocol using the GURUX library. At the end of the work is described a series of tests that were performed using this software library.
|
|
|
Smart meter simulation on KYPO platform
Morawiec, Daniel ; Gerlich, Tomáš (referee) ; Lieskovan, Tomáš (advisor)
This bachelor thesis is focused on problematics of smart grids, smart meters and protocols which are used in the energy industry. The part of thesis is dedicated to DLMS protocol and COSEM specification. Cloud platform OpenStack and cyber range platforms, more specifically KYPO CRP, are subsequently described in this work. In the last part of the bachelor thesis deployment of platforms OpenStack and KYPO CRP is executed and testing scenario with common elements of energy networks is commissioned on the platform KYPO.
|
guest ::
