Research And Application Of Data Portal In Electricity Dispatch Management Information System

The development of electric power enterprise informationization speeds up in recent years.But the data, which are the core of all applications, are still stored in different systems with different manners and live by themselves in distributed and heterogeneous environment.With the steady increase of application requirements, more and more people want to access and manipulate the useful information among multiple massive information sources and achieve the interoperability of multiple computer systems and different information sources.However, these data sources may not only geographically locate at multiple autonomous domains in heterogeneous environment with different data formats, storage modes and access control policies, but also logically differ from each other in data models,manipulation languages and data semantics.In order to visit heterogeneous data sources transparently by users , building data portals become the subject of an effective solution .Data Portal can shield the variety of heterogeneous data management systems of different access methods and users Interface, showed a public interface of the variety of heterogeneous data sources to the users, to provide an integrated handle a variety of data sources, integration of multiple data for the results of the data sharing and exchange platform.Based on the data portal functions analysis,this paper discusses relative technology such as data integration,access control,reporting tools for data show and full-text search.Focused on the data integration of existing solutions.on this basis,designed the three-tier architecture of the data portal, and analyzed the functional modules. In the middle layer , we customize a global query language, discusses the global query execute process.Then we discusses design and implementation of the full-text search engine Based on Lucene. Finally, this paper summarizes the results of our work ,and describles the problems of data integration still needing to be solved and the new technology which can solve these problems.