Many automatic systems of electric power system, such as, Energy Management System (EMS), Tariff Meter System (TMS), etc, usually have separate data model that it's necessary to achieve resource sharing and data integration of these automatic systems. This paper introduces the research and development of distributed data integration query system based on CORBA which integrates the real-time data that are related to EMS and TMS from Plant Information (PI) database. Strategies like fuzzy search and conversion of coding format are made to solve problems like different naming method for equipments and different coding method for measurements' information in each automatic system. The query system is tested in Shenzhen Regional Dispatch Center and the result shows that the system could acquire relevant real-time data rapidly and accurately. As a result, the goal of resource sharing and data integration is reached.
