Abstract
In normal operation of the nuclear power plant, the display, control and record are accomplished in Digital Control System (DCS). Turbine Control System (TCS) exchanges data with DCS through communication. The control cooperation between Turbine Control System and DCS is studied, which caused the turbine tripped during running up to rated speed accidentally, and caused an abnormal shutdown when switching to Speed mode while in load operation. By studying TCS and DCS control cooperation scheme and speed set-point tracing scheme. Improving the speed set logic and communication time, modifying the communication packet sequence and other measures. Finally the problem of accidental tripping and abnormal shutdown is solved effectively. By improvement of control scheme, the safety and reliable control changing-over between TCS and DCS turbine is guaranteed. Meanwhile the availability of nuclear reactor is enhanced; thus safety and reliable operation of entire nuclear power plant is guaranteed technically.
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