| IEC 61850 is an international standard about substation automation constituted by IEC TC57.It reflects the development's direction and tendency of the substation automation, and arouses the widespread interest of the domestic and foreign power industry. The transformer is a core equipment in the substation its protection, measurement and control equipments are the main equipments of substation automation system. Therefore , it is significant for us to apply the IEC 61850 standard to the transformer's protection, measurement and control.The background, the domestic and foreign present situations, the significance and the content of IEC 61850 are introduced in this paper, the analysis of IEC 61850 standard's modeling process are described. The actual traction transformer protection, measurement and control equipments are taken as examples to model. The realization of traction transformer's protection, measurement and control functions based on the IEC 61850 is discussed. Firstly, based on the function free distribution and the assignment concept of IEC 61850, the protection, measurement and the control unit are separated and the respective function is describe by the logical node. Secondly, according to the modeling approach and principle based on IEC 61850, the typical protection, measurement and the control logical nodes are taken as examples to complete modeling of logical nodes. Further , the homologous public data classes are chosen as templates and the homologous data attributes in the public data class are determined to take as the modeling's data object attributes. Then, GOOSE is used to provide the data's exchange, this method simplify the tradition complex data exchange greatly. At last, the flow chart of the function realization is described and the flow of the function realization is discussed.In this foundation, the transformer differential protection is taken as an example to show the configuration process of its logical equipment and the logical node .
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