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专利名称：AUTOMATIC STEAM GENERATOR CONTROL
AT LOW POWER
发明人：SINGH, Gurdip申请号：EP904911.0申请日：190313公开号：EP0411013A1公开日：19910206
摘要： The water level of a steam generator, the temperature of the feedwater andthe reactor power is continuously measured and a signal level (76), a temperature signal(78), and a power signal (80) in connection with these measures are generated
respectively. From the power signal and the temperature signal is generated a notionalflow signal (84) corresponding to the feed water flow which give the steam generator astable level of water in the conditions of stability of the signal power and the
temperature signal. The signal level is compared with a setpoint (54) and a level resultingerror signal (86) is generated. The level error signal is weighted by a gain factor (88)which is a function of the temperature signal and provides a level of error weighted signal(90). The flow of feed water through the bypass valve is then adjusted according to thetheoretical flow signal (84 ') and the weighted error signal level. In a preferred
embodiment of the invention, the transition between the control low power by means ofthe bypass valve and the high power control using the power main water valve is effectedby the production a main valve position signal (118) and producing an enable signal (124)when the power signal is within a desired transition power range. When the power is inthe transition range, the flow of feedwater through the bypass valve is decreased or
gradually increased depending on the theoretical flow signal, the error-weighted signaland main valve position signal, as the main supply flow of water increases or decreases.
申请人：COMBUSTION ENGINEERING, INC.
地址：1000 Prospect Hill Road Windsor Connecticut 06095 US
国籍：US
代理机构：Gross, Gernot K.
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