Design On The Online Monitoring Of IEC61850Intelligent Substation

IEC61850standard is the latest international standard of the communication network of substation, which is developed by the International Electrotechnical Commission. The purpose of this standard is to develop the interoperability among different devices. This standard not only divides the substation into three layers, which are controlling layer, middle layer, processing layer, but also defines the communication standard between the interfaces of specific layers. The online monitoring on intelligent devices is the basic of network security. In this thesis, we will design an online monitoring system. This system, which, conmbines the fault wave recording equipment and network monitoring equipment, can not only justify the abnormal case and recorde the packets, but also can transmit those information to the controlling layer, so the PC of the controlling layer can process them statically.Traditionally, in the processing of subsation maintenance, fault wave recording equipment works separately with the network monitoring equipment, thus, it’s difficult to combine these informations of them, so this kind of the solutions will reduce the efficiency. The system introduced in this thesis can monitor the status of the network online, analyze the specific information in packets. Thus, the studied system will contribute on the location of the abnormal cases and hence increase the efficiency of the network maintaining.The online monitoring system is composed by four modules, such as packets capture module, packets saving module, online analysis module, flowing statistics module and communication module. The packets capture module is responsible for the capture of the filtered packets from data link layer, and it will not influence the operation of the system kernel; the packets saving module saves the packets; the flowing statistics module can statistics the network flowing, and the information exchange will be done by the communication module. The test results at the end of this thesis shows that this monitoring system can analyze every simulated problem, thus, this system has a high theoretical and pratical value.