Rotor-stress preestimating turbine control system

摘要: The present stress in the turbine rotor is estimated at each control period, from steam temperature and pressure inlet. In addition, future inlet or preestimated once every n T cycles, for a given speed load changing rate, making use of data concerning rate relation with change load, which has been obtained by learning past operating condition. This used as factor preestimating expected to be caused rotor. preestimation performed plurality assumed rates. controlled maximum increase-rate would not cause over time exceed limit stress. An observation made period check whether exceeded