Reactive droop compensation system and method
AssigneeRockwell Automation Technologies, Inc.
InventorGerald W. Davis
Life of this patent
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Abstract
A system for controlling reactive currents in a generator is provided. A control system receives current and voltage feedback from the generator. The control system determines a phase angle based on the current and voltage feedback. The control system determines a compensation signal corresponding to the phase angle and current. The control system modifies a generator excitation signal based on the compensation signal and a bi-linear transformation technique.
Claims17
A system for controlling reactive currents in a generator;
- comprising:
- a control system for receiving current and voltage feedback from the generator, the control system determining a phase angle based on the current and voltage feedback, the control system determining a compensation signal corresponding to the phase angle and current, the control system modifying a generator excitation signal based on the compensation signal and a bi-linear transformation technique.
A system for controlling reactive currents in a generator;
- comprising:
- means for receiving current and voltage feedback from the generator;
- means for determining a phase angle based on the current and voltage feedback;
- means for determining a compensation signal corresponding to the phase angle and current;
- and
- means for modifying a generator excitation signal based on the compensation signal and a bi-linear transformation technique.
A method for controlling reactive currents in a generator;
- comprising:
- receiving current and voltage feedback from the generator;
- determining a phase angle based on the current and voltage feedback;
- determining a compensation signal corresponding to the phase angle and current;
- and
- modifying a generator excitation signal based on the compensation signal and a bi-linear transformation technique.
A system for controlling reactive currents in a generator;
- comprising:
- a system for receiving current and voltage feedback from the generator;
- a system for determining a phase angle based on the current and voltage feedback;
- a system for determining a compensation signal corresponding to the phase angle and current;
- a system for modifying a generator excitation signal based on the compensation signal and a bi-linear transformation technique, the bi-linear technique employing at least the following equations:
- ZP=−[C×XP×θP];
- wherein:
- ZP provides the compensation signal which represents (voltage droop magnitude in per units—VCA magnitude in per units);
- C is a constant defined by known endpoints of a plane representive of a three-dimensional relationship between a burden voltage;
- a power factor phase angle;
- and voltage droop over a predetermined range;
- XP is a most recent burden voltage factor (VBR);
- and
- θP is a most recent power factor phase angle computed from the voltage and current feedback.
Dependencies are inferred from the claim text.