Abstract In an electric-hydraulic governor for a hydraulic turbine there are electrically connected to the input of an amplifier an element for measuring the angular speed of the turbine-generator unit, a mechanism for varying the output frequency of the generator and an element for measuring the frequency in the associated mains. The said mechanism, with the turbine-generator unit idling, continuously follows up the deviation of the output frequency of the generator from the frequency of the mains and in every moment of time produces a signal representative of this deviation. The mechanism is controlled by an electric motor including a control winding connected to another amplifier. The input of this other amplifier is electrically connected with the output of the element for measuring the mains frequency and with the output of the said mechanism for varying the frequency of the output current of the generator. Following synchronization, upon connection of the turbine-generator unit to the mains, the element for measuring the mains frequency is disconnected from said second amplifier and the mechanism for varying the frequency of the output current of the generator is connected thereto.
An electric-hydraulic governor for a hydraulic turbinecombined with a power generator into a turbine-generator unit, said governor comprising: a tachogenerator, drivenly connected with the shaft of said turbine-generator unit; an element for measuring the angular speed of said turbine-generator unit, connected to said tachogenerator and supplied with power therefrom; a mechanism for varying the frequency of the output current of said power generator, adapted, with said turbinegenerator unit idling, to effect continuous follow-up of the deviation of the frequency of the associated mains from a standard frequency and to produce in any given moment of time a signal representative of this deviation; an electric motor with a control winding, adapted to control said mechanism for varying the frequency of the output current of said power generator; a relay associated with the mains connection switch of said power generator, having three contacts of which the first and the second contacts are normally closed and the third contact is normally open; an amplifier having connected to the input thereof: said element for measuring the angular speed of said turbine-generator unit, an element for measuring the frequency of said associated mains which is connected to said input through said first normally closed contact of said relay and said mechanism for varying the output frequency of said power generator, connected to said input through said third normally open contact; a second additional amplifier connected through said second normally closed contact to said control winding of said electric motor; the arrangement being such that following synchronization, upon connection of said turbine-generator unit to said mains, said first and second normally closed contacts are opened, and said third normally open contact is closed.
Claim 2
Dependent Claim
277 words
An electric-hydraulic governor for a hydraulic turbinecombined with a power generator into a turbine-generator unit, said governor comprising: a tachogenerator, drivenly connected with the shaft of said turbine-generator unit; an element for measuring the angular speed of said turbine-generator unit, connected to said tachogenerator and supplied with power therefrom; a mechanism for varying the frequency of the output current of said power generator, adapted, with said turbinegenerator unit idling, to effect continuous follow-up of the deviation of the frequency of the associated mains from a standard frequency and to produce in any given moment of time a signal representative of this deviation; an electric motor with a control winding, adapted to control said mechanism for varying the frequency of the output current of said power generator; a relay associated with the mains connection switch of said power generator, having three contacts of which the first and the second contacts are normally closed and the third contact is normally open; an amplifier having connected to the input thereof: said element for measuring the angular speed of said turbine-generator unit, an element for measuring the frequency of said associated mains which is connected to said input through said first normally closed contact of said relay and said mechanism for varying the output frequency of said power generator, connected to said input through said third normally open contact; a second additional amplifier connected through said second normally closed contact to said control winding of said electric motor; the arrangement being such that following synchronization, upon connection of said turbine-generator unit to said mains, said first and second normally closed contacts are opened, and said third normally open contact is closed.