| The digital transformer substation development is extremely rapid ,how relay protection disposes in the digital transformer substation is count for much. The article has analyzed the digital transformer substation for the influence which relay protection brings, summarized in the present digital transformer substation the conventional protection disposition plan and the system protection disposition plan two kinds of relay protection dispositions plans, describes two kinds of plans constitutions, has analyzed two kind of plans good and bad points, proposed the conventional protection disposition plan is the transition plan which the digital transformer substation relay protection one kind is easy to realize, the system protection disposition plan lacks the movement experience, but has the wiring to be simple, to analyze the comprehensive merit, is the digital transformer substation relay protection development direction. The 110kV Jin Yu substation, for example, details the use of conventional digital substation protection scheme based.Two solutions always be applied for digitization on Relay Protection for substation, that is, conventional protective solution and new System Protective Solution. For conventional solution, equipment be applied based on machine required,without consideration of changes on logical theory. And the operators are more familiar with conventional and more easily for the completion of transition for Relay Protection. Principal for Application of Relay Protective: Both Conventional Protective Solution and new System Protective Solution applied, so as to ensure the system can be tested completely. Application of System Protective Solution is an innovation. With operation of two system on one set of equipment, more easily operation be obtainable. Even though the lack of operating experience for operators, System Protective solution provides the direction for future development.
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