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1、Modeling of Digital Protective Device According to IEC61850 Abstract IEC 61850 is an international standard about substation constituted by the substation IEC TC57.It reflects the developments direction and automation tendency of automation, and arouses the widespread interest of the domestic and fo

2、reign 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 Digital transformers protection, measurem

3、ent 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 standards modeling process are described. Firstly, based on the function free distribution and the assignment concept of

4、 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 exampl

5、es to complete modeling of logical nodes with UML. 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 IED is taken as an example to show the configuration process of its l

6、ogical equipment and the logical node. Key words: IEC 61850； UML； IED； Object model； Logical node； Logical equipment Substation automation system by multiple subsystems is essentially composed of distributed control system, therefore layer in the transformer substation Still, the internal system thr

7、ough internal data communication, to realize the subsystems between subsystems and internal information exchange and sharing information, to reduce the substation second equipment configuration, and simplify the repeat of the subsystems of the interconnections, not only reduce repeated investment, a

8、nd also to improve the security and reliability of the system as a whole. But, the actual circumstance of each transformer substation be respectively each product supplier in order to fight, usage dissimilarity of communication code. Almost each produce a company should the company all have a set of

9、 oneself of standard, cause in the whole system circulate of the code may attain several 10 kinds. Equipments cant share information, hard assurance of the consistency of data. This be problem in” automation isolated island”. This kind of phenomenon not only increment a great deal of correspondence

10、agreement of code conversion and equipments of repeated devotion, return will result in correspondence not dependable. This obviously cant satisfy a transformer substation automation inner part the information be accurate, quickly collections, processing with deliver of request. Therefore, our count

11、ry of the transformer substation automation be urgent demand 1 kind can and permit various correspondence agreement, exaltation product with each other operability, real realization have never sew correspondence of international of correspondence agreement1-2.The transformer substation automation de

12、liver a code and deliver a standardize of network, is realization the credibility be fast correspondence of assurance. correspondence agreement1-2.The transformer substation automation deliver a code and deliver a standardize of network, is realization the credibility be fast correspondence of assur

13、ance. 20 century the beginning of 90s, the international electro-techniques committee IEC(the Commission of the International Electro technical) be aware of to come from dissimilarity factory house of the electronics intelligence equipments IED demand a standard of the information connect, with real

14、ization equipments of with each other operability(Interoperability).Is this, IEC two IEC TC57 of the technique committee and the IEC TC95 established a consociation work set, establishment” after electricity protection the equipments information connect standard namely IEC60870-5-103 standard The in

15、stitute for research EPRI(the Research Institute of the Electric Power) of electric power science of the United States in 1990 beginning Mr. common Letter system UCA(the Architecture of the Utility Communication) standard of establishment work, its purpose lie in provide a Have extensive adaptabilit

16、y of, the function be strong of correspondence agreement, can make various IED pass usage should agreement realization with each other operation3. For avoiding appear two possibility conflict of standard, IEC decision with the UCA2.0 data model kimono duty is foundation, UCA Of research result bring

17、 into IEC standard, in the meantime absorb IEC60870-5-103 standard of implicit data model, establishment unify of world scope standard IEC61850, and in 1999 March put forward committee drafted plan edition. IEC 61850 be the correspondence network of transformer substation automation and the internat

18、ional standard of system. Establishment IEC 61850 main purposes is make dissimilarity manufacturer of the product has with each other operability and make these product drive expediently integration to go in a system. According to IEC 61850 of definition, with each other operability is come from sam

19、e factory house or dissimilarity factory house of the IED(the Commission of the International Electrotechnic) exchange information and exactitude usage the information moderate operation of ability. If the of IED can carry on with each other operation, then constitute tofrom the IED of auto the , an

20、d sub- system of the beggar system with adjust an of one degree center with each other operation possibility realization. With each other operability with information share and system integration is foundation of ice 61850 usages nowadays forerunner of the information technique was a transformer sub

21、station establishment unify of object model and correspondence connect, real meaning top the intelligence electronics of the realization transformer substation equipments of with each other the operability be the best solution that the transformer substation have never sew correspondence. IEC 61850

22、representative transformer substation automation of future development direction, in fact necessarily will give transformer substation automation the level bring huge of push function. The transformer substation correspondence network is a conjunction the Niu of various intelligence electronics equi

23、pments inside the transformer substation take, is the life vein of transformer substation automation, it of credibility and information deliver of the fast come to a decision system of can use sex. Therefore, research according to IEC 61850 of transformer substation correspondence network structure,

24、 to transformer substation correspondence network of solid hour and credibility carry on analysis research and have importance of theories and reality meaning. . 1.2 Topic background IEC 61850 targets is formation a standard of the open type transformer substation automation and correspondence syste

25、m, it make to come from dissimilarity of the IED of the manufactory realization goodly and with each other operability, and ability orientation calculator and correspondence technique of fast development, thus exaltation system of credibility, decrease customer of investment and maintenance cost4.Th

26、e object set up a mold technique, UML(the Language of the Unified Modeling unify to set up mold language), XML(the Language of the extensible Markup can expand marking language) etc. forerunner technique of emergence for IEC 61850 of realization provide reality of foundation and condition. Conduct a

27、nd actions new transformer substation correspondence network and system standard, IEC 61850 of research and application for exaltation our country transformer substation automation the profession whole level have importance of meaning. Our country transformer substation calculator supervision of mar

28、ket scale big take a post in world what nation, our country complete have ability should also in the IEC 61850 of research and usage the aspect obtain oneself of a place. 1.3 Domestic and international IEC 61850 of research and it development present condition Turn transformer substation corresponde

29、nce research to involve IEC61850 correspondence code according to the numeral of IEC61850 and according to process layer equipments numeral turn of transformer substation of research, numeral turn a transformer substation very the problem of core is a network structure and correspondence. Underneath

30、 difference from the IEC61850 standard and numeral turn a transformer substation correspondence both side to all say domestic and international research present condition. 1.3.1 Abroad IEC 61850 of research and it development present condition IEC 61850 from the beginning establishment be subjected to international top of extensive concern. In the establishment the IEC 61850 processes, the United States