Electricity: single generator systems – Generator control – With excitation winding and/or circuit control
Reexamination Certificate
2008-01-02
2010-06-29
Patel, T C (Department: 2839)
Electricity: single generator systems
Generator control
With excitation winding and/or circuit control
C318S616000, C318S702000, C318S758000, C318S802000, C318S803000
Reexamination Certificate
active
07746038
ABSTRACT:
A controller employed in conjunction with a synchronous generator monitors the output voltage of the generator. The controller employs the monitored output voltage as feedback that is used to control the excitation provided to an exciter field winding. In addition, the controller applies a control loop to the monitored output voltage that detects and modifies voltage ripple signals within the monitored output voltage to generate a compensated signal that is used to control the excitation to the exciter field winding. In particular, by detecting and modifying voltage ripple signals within the monitored output voltage, the controller is able to counteract armature reaction voltage ripples caused by unbalanced short-circuit faults, thereby preventing the build-up of voltage on the DC link.
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Defenbaugh John F.
Maddali Vijay K.
Cuevas Pedro J
Hamilton Sundstrand Corporation
Kinney & Lange , P.A.
Patel T C
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