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<p>The industry struggles with problems concerning physical damage to wires</p><p>and communication in remote areas. Introducing a wireless network can</p><p>provide a solution to these issues. However, introducing wireless</p><p>communication comes with a whole new line of problems that will be</p><p>covered in this report. By utilizing the wireless communication standard</p><p>IEEE 802.11 a product can easily be integrated into an existing wired</p><p>Ethernet network (IEEE 802.3).</p><p>An introduction to the standard IEEE 802.11 and a summary of existing</p><p>products utilizing the standard for embedded systems will be given</p><p>throughout the report. This report also tries to explain key parameters for</p><p>wireless communication in an industrial environment.</p><p>This project also consists of a design and an implementation part, where the</p><p>chosen IEEE 802.11 standard will be integrated into the existing wired</p><p>Anybus-S Ethernet module from the company HMS Industrial Networks.</p><p>The integration part of the project has resulted in a working prototype called</p><p>Anybus-S Ethernet Wireless that utilizes the IEEE 802.11b/g standard for</p><p>transferring data.</p><p>The project has been really fun to participate in and it has been successful in</p><p>the terms that a working prototype exists, and the authors have gained the</p><p>knowledge in the subject as intended.</p>

The industry struggles with problems concerning physical damage to wires and communication in remote areas. Introducing a wireless network can provide a solution to these issues. However, introducing wireless communication comes with a whole new line of problems that will be covered in this report. By utilizing the wireless communication standard IEEE 802.11 a product can easily be integrated into an existing wired Ethernet network (IEEE 802.3). An introduction to the standard IEEE 802.11 and a summary of existing products utilizing the standard for embedded systems will be given throughout the report. This report also tries to explain key parameters for wireless communication in an industrial environment. This project also consists of a design and an implementation part, where the chosen IEEE 802.11 standard will be integrated into the existing wired Anybus-S Ethernet module from the company HMS Industrial Networks. The integration part of the project has resulted in a working prototype called Anybus-S Ethernet Wireless that utilizes the IEEE 802.11b/g standard for transferring data. The project has been really fun to participate in and it has been successful in the terms that a working prototype exists, and the authors have gained the knowledge in the subject as intended.

This Diploma thesis deals with the system for protection and remote control for MV switchgear by using protection relays with communication protocols PROFIBUS and IEC61850. The first part represents a theoretical introduction to points at issue. In the first part, the reader will get conceived with the communication standard IEC61850 and its typical architecture for MV switchgear, and also with data model based on this standard. Second part discusses the PROFIBUS communication protocol. In this part, the reader can acquire information about transmit technology and communication protocol for PROFIBUS. Last part of this theoretical chapter contains an overview on the MODBUS communication. The second part deals with the description of protection relays, which were used for the purposes of this thesis. In the first subchapter, the reader can learn about the REM620 from ABB Company, its configuration and cooperation with IEC61850 standard. Second subchapter describes the HMS Anybus communication converter. The reader will get further knowledge about description of this device and how to configure the communication protocols. In last subchapter, a description of protection relay SIPROTEC 7SJ64 produced by Siemens company is explained. With the third part starts the practical work within this thesis with protection relays. This chapter is divided into two parts; each describes different system with using the protection relays. First system contains ABB REM620 relay and HMS Anybus converter. By converting MODBUS protocol with the Anybus converter, the REM620 can be connected to PROFIBUS network. This part includes the configuration of REM620 and Anybus converter, the engineering of MODBUS and PROFIBUS protocols and testing various signals in those networks. The second system contains Siemens SIPROTEC 7SJ64 and ethernet switch. This subchapter deals with the preparation of configuration for SIPROTEC 7SJ64 and the engineering for IEC61850 communication. This part finishes with the comparing of both systems on the engineering bases. The last part of this thesis is about working with the LabVIEW instrument. Within this part, the software emulation of protection relay was made. The program offers to the user the possibility of setting input parameters as the effective values of current and voltage, the frequency and the current phase shift. Also the user can set the thresholds for protection functions, such as the Overcurrent, the Voltage and the Frequency protection. As last one, the Phase unbalance protection for the current phases is present.

Wireless communication is important in data transportation between devices. It is as ever important to find the best connection fitted for the users specific requirements. This process can be a hassle and having an application testing all the options could save both time and resources. This project involves solving mentioned problem and to create an application implementing the solution. A method of recommending a connection is to measure different metrics e.g throughput and packet loss for Bluetooth (BT) and each channel on 2.4GHz and 5GHz Wireless Area Network (WLAN). By using an appropriate algorithm to rate the connections a result ranging from best to worst can be displayed to the user. Limitations on metrics can be inputted by the user to tailor the result to match user requirements. The application is based on Hardware Meets Software (HMS) product Anybus Wireless Bridge II. With a Telnet connection Attention-commands (AT-commands) can be used to configure and utilize the modules e.g measure signal strength. Third-party services POCO and iPerf are used to measure other metrics e.g throughput and latency. C++ and Visual Studio was used to develop the application. In accordance to the test specification the projected resulted in a successfully working application. Tests prove that with interference on a channel results in a worse rating and that other channels that are unaffected gets a higher ranking on the list. There is still room for improvement regarding exception handling when connection timeouts happen due to loss of signal.