Control of a wound field synchronous generator for transient load response
AssigneeHamilton Sundstrand Corporation
InventorsMichael C. Harke, John F. Defenbaugh
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Abstract
A method and controller for controlling a Wound Field Synchronous Machine (WFSM) of an electric power generation system (EPGS) having a field winding and a stator armature winding is provided. The controller includes an adjustable component coupled to the generator and a power factor controller for adjusting the adjustable component to lower the power factor of the WFSM as a function of power output to a load of the EPGS to stabilize a current in the field winding.
Claims23
A controller for a Wound Field Synchronous Machine (WFSM) of an electric power generation system (EPGS), the WFSM having a field winding that interacts with a stator armature winding, the controller comprising:
- an adjustable component coupled between a generator of the WFSM and the load;
- and
- a power factor controller configured to:
- adjust, before occurrence of a transient or at steady state, the adjustable component to decrease a power factor of the WFSM as a function of load of the EPGS responsive to sensing that the load demands light power below a threshold percentage of full power for providing an improved transient response to a change in sensed load demand;
- and
- receive feedback of electrical properties of output from the adjustable component, wherein the feedback is used to determine the adjustment.
An electric power generation system (EPGS) comprising:
- a wound field synchronous machine (WFSM) having a field winding and a stator armature winding that interacts with the field winding to output power to a load;
- and
- a controller, the controller comprising:
- an adjustable component coupled between a generator of the WFSM and the load;
- and
- power factor controller configured to:
- adjust, before occurrence of a transient or at steady state, the adjustable component to lower a power factor of the WFSM as a function of load of the EPGS responsive to sensing that the load demands light power below a threshold percentage of full power for providing an improved transient response to a change in sensed load demand;
- and
- receive feedback of electrical properties of output from the adjustable component, wherein the feedback is used to determine the adjustment.
A method for controlling a wound field synchronous machine (WFSM) of an electric power generation system (EPGS), the method comprising:
- adjusting, before occurrence of a transient or at steady state, an adjustable component of the EPGS to decrease a power factor of the WFSM as a function of load of the EPGS responsive to sensing that the load demands light power below a threshold percentage of full power for providing an improved transient response to a change in sensed load demand;
- receiving feedback of electrical properties of output from the adjustable component;
- and
- controlling adjustment of the adjustable component of the EPGS using the feedback to decrease a power factor of the WFSM as a function of load of the EPGS responsive to sensing that the load demands light power below a threshold percentage of full power for providing an improved transient response to a change in sensed load demand.
Dependencies are inferred from the claim text.