| With the rapid development of computer technologies,heterogeneous information source exists in every information management system which causing a lot of single information-island.As the national economy foundation industry,the power industry plays a vital role in the development of the national economy and the society.During the process of information construction of power industry,many heterogeneous island information systems were come out,just because the deepening of reform and the rapid development of information technology.In the complex power application system,how to interconnect and data sharing among these heterogeneous systems is a very important research topic.This paper analyzed the related theory and method of information integration of these heterogeneous systems.It focuses on the method of integration based on virtual database.This article advanced an integration method of power system with virtual database method,one of the virtual view,which based on analyzed the advantages and disadvantages of each method of information integration and the demands of power system.In the implementation plan,adapt a method based on the virtual database and CIM to encapsule the existing datasources.The method can solve series problems of heterogeneous data-source perfectly.And the system meets the basic needs of the power system.To achieve the interconnection and data sharing among these heterogeneous systems,this article study on the retrieval of data and state of power system.Analysis and comparison of the topology algorithm,design a schema of the retrieval of data and state,discussed the realization of the schema,and improved related algorithm.End of the paper,we take some methods to verify the feasibility and effectiveness of this system.As a result,this project achieved some practical applications. |
