摘要:
An electronic system is provided for operating a nuclear electric power plant with electronic steam reheating control applied to the nuclear turbine system in response to low pressure turbine temperatures, and the control is adapted to operate in a plurality of different automatic control modes to control reheating steam flow and other steam conditions, each of such modes of control permitting turbine temperature variations within predetermined constraints and according to predetermined functions of time.
摘要:
In order to provide temperature control for the exhaust hood region of low pressure turbines, the exhaust hood sprays are activated in response to measured load and steam exhaust pressure. During start-up of the generator, the sprays always are turned on. During normal operation, the status of the sprays depends on the relative amounts of load and vacuum pressure. If the load is less than 10 percent, the sprays are always on, and if the load is greater than 25 percent, they are always off. In the range between 10 and 25 percent load, the status of the sprays depends both upon load and vacuum. In that range, if the vacuum is less than 26 inches Hg., the sprays will be on, and if the vacuum is greater than 28 1/2 inches Hg., they are off. Between 28 1/2 and 26 inches vacuum pressure for the 10 percent to 25 percent load, the status of the sprays depends upon a combination of the two factors.