The thought of the study and development of SIS is proposed to establish a uniform data center platform based on the foreign large and special real-time and history database, moreover, to study and develop particular function modules and assistant tools on self-dependence.

The key issues on real-time data acquisition technology during SIS construction,type selection for the real-time/historical database,function setting,and network framework are discussed and analyzed.

This paper introduces the construction of supervisory information system in fossil fuelled power plants,including selectionof real-time/historical database,data acquisition technology,development of application software and network topology,etc.

PI,a real-time/historical database,had been extensively applied in plants information process which was superior in efficient access and large data storage to relational database.

Application of Berkely DB to real time/history database;

Then through an example in electric power system, the method that VC++ 5 0 realize the accessing to thehistorical database is stated by using ODBC under the environment of Windows95.

A programme designed with VB aiming at the historical database section of an industrial realtime information system in some petrochemical plants,which realizes the historical data storage from PHD real time database to Oracle relational database is introduced.