Application Iec61850 Standard Microprocessor Line Protection

Transmission-line takes on the task of power transport and distribution playing the decisive role to the safety of electric fence and economy running as an important link of the power system. With the deep development of computer in the application of relay protection, IED (Intelligent Electronic Device) turns into the important device of the substation automation system. IEC 61850 responses the achievement to the technology of the substation automation, computer software and communication. Its advantage is interoperability with the great desire .Manufacturer of Microcomputer protection should make research and development on the base of current product, realizes the train of thought to the full digital substation.This paper makes the simple introduction and analysis to the current application situation and realizing method about IEC 61850 in the fields of synthesized automation through looking up correlate documents. Paper does research on the kernel technology of IEC 61850, pointing that the important character of IEC 61850 is that it introduces object-oriented method to establish uniform information models of functions in substation.The paper introduces the structure of DF3322E protection equipment and sets out the altering thought about the IEC 61850 standard to the current protection equipment of DF3322E through the IEC 61850 application. Then, the paper builds the data model of the IEC 61850 based on the protection of overcurrent controlled by undervoltage and negative-sequence voltage in the transmission-line protection equipment of DF3322E. Also, paper probes the modeling difference in the current application of logic node modeling. The paper makes component processing to agree with the IEC 61850 standard, and make the contrast to the logic graph and flow chart of the anteroposterior component.The developing equipment according to the method does processing based on the mature technology of the inhere equipment making the least altering to the inhere protection equipment. The designing method not only satisfy the requirement to the current IEC 61850 but also lays the foundation of improving developing speed , reducing the cost of developing and maintenance, improving the safety of the operation and reliability of the protection equipment.