Embedded Ethernet Communication Technology And Its Application In Middle And Low Voltage Microcomputer Protection And Measurement Device

With the development of computer and network communication technology, the applying of the new technology leads to the quick development of substation automation system.The thesis mainly makes the research on middle and low voltage microcomputer protection and measurement device based on embedded ethernet communication technology.Firstly, the paper analyses the development of substation automation system, and researchs conditions and problems of its communication system. Then the paper brings forward using Web server technology in substation communication system, and introduces the situation of its application. Based on the theory, it analyses the basic functions of network-type microcomputer protection and measurement device.Secondly, the thesis analyses the network-type substation automation system, including the netwoek type, structure, protocols and power system communication protocols. The paper researchs the functions of applying Web server technology and the methods of its application in substation communication system. Based on this, the thesis designs the network-type microcomputer protection and measurement device including hardware system and software system.According to this design method, The paper designs a network-type microcomputer protection and measurement device based on DSP platform. It mainly introduces the design and debug of its communication module. It researchs the realization of IEC60870-5-103 communication, and applys it in the reserved auto-switch-on device.The paper also analyses the embedded Web server technology and applys it in a micro embedded Web server module. It introduces the software and hardware of EWS module and its realization in detail. Then the paper applies this micro EWS module in the micro-computer reserved auto-switch-on device.In the end, the paper concludes the main work this thesis and raises some research topics after it.