Application of OPC Technique in Automatic Dispatching System of the Middle Route of South-to-North Water Diversion Project
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Abstract:
Water regulation system is one of the core compositions of automatic dispatching system of the middle route of the South-to-North Water Diversion Project (MSNWDP). The survey data such as the canal water level, flow rate, and sluice gate opening a collected by monitoring devices reflect the real-time state of water transfer control in the canal, and they are the necessary input data for the water regulation system. Consequently, an appropriate data transfer approach is needed between the water regulation system and sluice gate monitoring system. Based on the basic principle and data access specification of OPC technique, this paper proposed an OPC-based system integration scheme to retrieve the real-time survey data from sluice gate monitoring system and to send control orders back to sluice gate monitoring system. The implementation of water regulation system in the Jingshi Section of MSNWDP suggested that the proposed OPC-based integration scheme can better realize the data transfer between the two systems with the reduction of the integration cost and improvement of the system stability and flexibility.
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