Realization for data communications of the supervisory information system of plant level in power plant

The core objects studied in this paper are the data communications in the supervisory information system (SIS) of plant level in power plant that includes data transfer, data processing, data store and data interaction with users. In the aspect of data mining, the problems which can´t be solved through adopting the socket network programming are overcome by applying a standard OPC (object linking and embedding for process control) interface based on an OPC specification or the direct network access to receive the precise data in time; in the other aspect of data analysis and distribution, the efficiency of SIS is improved by building the buffering database and the conflict of data accessing is solved effectually by adopting three buffering recycling queue storage arithmetic. Meanwhile, the technology of ASP (active server pages) program and the development of Web application are simplified greatly through application of the combination of ActiveX components and ASP applications method