Research And Realization Of The Function That Parsing External Protocol In The61850Gateway

With the spreading of the intelligent substation, the communication protocols IEC61850also use widely. However, there still exist some devices with the old protocols in substation nowadays. It is too expensive to change the old devices for the IEC61850, so there need to turn the old protocols to the IEC61850to realize the communication between the old and the IEC61850devices. The IEC61850gateway can realize that turn the old protocols and get the output of IEC61850and active the information exchange between intelligent devices. The function which parsing the external protocols of the gateway should realize parsing the different external protocols to get the information and transform them, so realize the data exchanging of different protocol.In this paper, firstly parse the external protocol that take the remote protocol IEC60870-5-104for example, analyze the structure and the transfer mode for IEC60870-5-104. Also take the structure of IEC61850for analyzing, researching on the service mode and data mode of IEC61850. Analyze the process of data mode and take the corresponding configure tool to generate the configure file.Then realize the mapping between the data of IEC60870-5-104and the data mode of IEC61850with analyzing the structure of the two protocols. Find the corresponding logic node of IEC61850through analyzing the frame structure of remote metering and remote signal. Analyze the correspondence between the service of IEC60870-5-104and the ACSI (Abstract Communication Service Interface) of IEC61850. Describe the mapping relationship between the point information of IEC60870-5-104and the data attribute of the logic node of IEC61850with the SQLite.At the end, realize the data receiving from the IEC60870-5-104protocol and parsing the data, read the configure file and the corresponding database file (the mapping relationship table); put the analyzed data into the data attribute of the logic node of IEC61850following the mapping relationship. Transmit the data of IEC61850protocol with the MMS and TCP/IP, and verify the function through building the IEC61850client with the testing tool:The function part of analyzing external protocols of IEC61850gateway can realize the parsing the IEC60870-5-104protocol correctly, and the gateway can realize that turn the IEC60870-5-104protocol into the IEC61850protocol.