초록 ▼

In a power control for a turbo-generator, the acceleration power of the difference between the mechanical power supplied to the turbo-generator set and the power delivered by it is determined and, if the supplied power preponderates, a correction signal directed toward closing control valves is fed

In a power control for a turbo-generator, the acceleration power of the difference between the mechanical power supplied to the turbo-generator set and the power delivered by it is determined and, if the supplied power preponderates, a correction signal directed toward closing control valves is fed to the power control by means of a valve positioning controller, Thereby, the power control need not be disconnected in the event of disturbances such as load shedding and network short circuit, but can practically remain engaged continuously.

대표청구항 ▼

A method for controlling a turbo-generator set including a generator and a turbine, and having a power control which delivers a control signal for control valves feeding the turbine with steam, comprising comparing the mechanical power supplied to the turbine with the actual power delivered by the t

A method for controlling a turbo-generator set including a generator and a turbine, and having a power control which delivers a control signal for control valves feeding the turbine with steam, comprising comparing the mechanical power supplied to the turbine with the actual power delivered by the turbo-generator set, and, for the case where the supplied mechanical power exceeds the delivered power by a predeterminable limit, bringing to bear a corresponding correction signal directed towards closing of the control valves. Apparatus for controlling a turbo-generator set which includes a generator and a turbine and has a power control which controls the control valves feeding the turbine, comprising: (a) an identification circuit having as inputs a control signal and a signal proportional to the delivered power adapted to form a control signal output; (b) means to increase said signal proportional to delivered power by a limit; (c) a multiplier having as a first input the output or said identification circuit and, as a second input, said power proportional signal increased by a limit; (d) a valve positioning control with intergrating behavior having the output signal of said multiplier as a reference value input; (e) means forming a signal proportional to the positive difference between the actual turbine speed and a reference speed; (f) an adding stage having the output signal of said valve positioning control as one input, and said signal which is proportional to the positive difference between the turbine speed and the predetermined speed as second input; and (g) first and second limiting stages having the output of the adding stage as inputs, one limiting stage having its output connected to the input of the power control and adapted to pass only input signals of such polarity that are directed toward closing of the control valves, the output signal of the other limiting stage acting in a negative feedback sense on the input of the valve positioning control, and passing only input signals of the other polarity.