A microcomputer real-time supervisory system with management and dispatch functions for the hydropower stations

The constituent principle of a new two-level microcomputer real-time supervisory system is discussed. It can be used for medium- and large-sized hydropower stations. The system has several functions: acquisition, processing, regulation, optimum operation, control, synchronism, event recording; fault reminiscing, waveshape record, diagnosis and process; relay protection, dispatch terminal and the work station of the management system, etc. The system is composed of a main supervisory system of the station room, monitor system of the chief office and monitor system of the engineering office. A two-level microcomputer configuration is used in the main supervisory system , and two-way parallel interrupt communication is used between two levels. The communication between the main system and the monitor system of the engineering office is realized with a string communication interface, and the communication between the monitor system of the station chief office and the dispatch centre of the electric power network is realized with a telecommunication interface. The lower position microcomputer uses AC sampling to acquire the field AC analog signal and uses DC sampling to acquire the nonelectrical signal through a transducer. Modularized programming is used in the system software. The module is dispatched by a real-time operation system.<>