A Secured Wireless Remote Control and Monitoring System with Redundancy
Liu, Yang (2005)
Tiivistelmä
Automated substation monitoring, diagnostics, and remote control systems provide many useful operating and reliability advantages. Their widespread use is, however, limited because of high costs making them economically infeasible. The needs have been concluded as a joint project to develop new low cost communication and control concepts for medium voltage devices such as switches and disconnectors that would enable the electrical grid operators to benefit from the advantages of the remote monitoring, diagnostics, and control by making such solutions economically feasible.
This thesis work looks into different solutions to the distance control and monitoring of medium voltage devices in the power grid and targets to implement a pilot system as an approach to validate the ideas and find possible improvements for the future deployment of such system in real industrial use. The objective is to design and implement a reliable and secured wireless remote control and monitoring system based on current available 2.5G/2.75G/3G commercial wireless communication networks e.g. GPRS/EDGE/UMTS. Such remote access solution is completely based on wireless communication network due to the fact that the control devices in the power grid are distributed over a geographically wide area and normally situated in remote locations. Besides the development of a traditional remote control and monitoring system, various solutions involving system modular structures, communication means, reliability and security enhancement etc have been proposed and analysed according to the strict requirements of the project with reference to military communication system standard, out of which comes the design and implementation of the pilot system.
The focuses of this work are greatly emphasised on enhancement of reliability and security over wireless links. The redundancy design which ensures the system is highly reliable and fail-safe under abnormal operating circumstances has been theoretically analysed to evaluate the system reliability performance. The security design involving various countermeasures and cryptographies has been implemented at hardware and software levels of the system, to ensure system security and data security. The reliability performance in wireless communication network has been analytically evaluated.
This thesis work looks into different solutions to the distance control and monitoring of medium voltage devices in the power grid and targets to implement a pilot system as an approach to validate the ideas and find possible improvements for the future deployment of such system in real industrial use. The objective is to design and implement a reliable and secured wireless remote control and monitoring system based on current available 2.5G/2.75G/3G commercial wireless communication networks e.g. GPRS/EDGE/UMTS. Such remote access solution is completely based on wireless communication network due to the fact that the control devices in the power grid are distributed over a geographically wide area and normally situated in remote locations. Besides the development of a traditional remote control and monitoring system, various solutions involving system modular structures, communication means, reliability and security enhancement etc have been proposed and analysed according to the strict requirements of the project with reference to military communication system standard, out of which comes the design and implementation of the pilot system.
The focuses of this work are greatly emphasised on enhancement of reliability and security over wireless links. The redundancy design which ensures the system is highly reliable and fail-safe under abnormal operating circumstances has been theoretically analysed to evaluate the system reliability performance. The security design involving various countermeasures and cryptographies has been implemented at hardware and software levels of the system, to ensure system security and data security. The reliability performance in wireless communication network has been analytically evaluated.