| With market-oriented reform of China's electric power enterprises in depth, to increase their competitiveness, reduce cost of power generation, and improve the operation and management fundamentally, power generation enterprises actively explore and develop Supervisory Information System(SIS). SIS, which is based on the real-time process data of the Distributed Control System, has been widely introduced into daily management of each power plant to make the plant operate in a more sufficient and economical way.Originating form the actual project of Honeywell corporation, this thesis elaborated the concept of SIS. Moreover the thesis provided the SIS solution on the basis of needs of the plant production and management and described the system structure, the functional demands and technology of computer network.From the view of practical application, it introduces the orientation of SIS in the power plant IT system, which group of users is SIS designed for, and the major function that the SIS brings. From the view of computer networks, it describes what kind of network is suitable for SIS, the basic principles to build such a network and the network architecture. From the composition of SIS system, From the view of system composition, it introduces the OPC(OLE for process control) which is used in data acquisition and PHD real-time database technology. As for further application development, it gives a practical multi-layer structure model, the design of function modules and the relative critical technology used to design such a system.Based on PHD real-time database platform, combined with .Net Remoting distributed technology, the system designed a Remoting Server, known as Smart Data Access Layer(SDAL). It is convenient for us to build the whole plant architecture model with the SDAL. SDAL is a server-like platform to alleviate information load involved in implementation, installation, configuration, and maintenance steps of SIS, enhance data quality and security, improve information sharing, and facilitate advanced applications. Services like licensing, logging, alarming, and running status monitoring are also available for application running above the layer. SDAL can be considered as computer's motherboard which provided monitoring and data accessing services. The application programs which run on SDAL can be considered as cards on expansion slot and implement various functions. At last of the paper, summarize the finished work and bring forward some improvement ideas of this system. |
