The Research Of Protective And Monitoring Device Based On Embeded Ethernet For A Substation

The automation of a substation is an integrated technology of microcomputer, micro-electronic, modern communication and auto-control technique, which realizes not only the fully-scale rebuilding of relaying but also the mode of communication for the traditional substation. With the development of technology for substation automation, the traditional relaying can't satisfy the request because of the simple protecting function. At the same time, the traditional corresponding method is unable to meet the request for real-time of the substation. Therefore, this paper presents Ethernet technology and designs a common hardware platform to implement protecting and monitoring functions.On the ways of hardware design, this design platform of protecting and monitoring device is advanced, which is based on ARM and high accurate AD sampling chip. RTL8019AS is used as the Ethernet controller to achieve communication with long-distance computers, which buildup the function of communication. On the ways of software design, embedded operating systemμC/OS- II is used as the software platform. The application of the Fourier algorithm advances the computing accuracy and the application of the embedded tidy TCP/IP protocol stack realizes the communication on Ethernet.