Electric power control system and efficiency optimization process for a polyphase synchronous machine
AssigneeUtilidata, Inc.
InventorDavid Gordon Bell
Life of this patent
Estimating the term…
Abstract
A system and process includes continuously determining an applied armature voltage supplied to a polyphase synchronous machine for which a maximum mechanical load is characterized by a pull-out torque. The armature voltage is supplied from a power source via one of many taps of a regulating transformer. The armature voltage being supplied from the power source to the machine is changed by selecting one of the voltage levels from the taps of the regulating transformer. The tap voltage levels are selected based on the determined applied armature voltage to minimize power consumption of the machine while ensuring based on a predetermined confidence level that the pull-out torque of the machine will not be exceeded.
Claims20
A method comprising:
- determining an applied armature voltage supplied to a polyphase synchronous machine having a pull-out torque, the armature voltage being supplied from a power source via one of a plurality of taps of a regulating transformer, a first tap of the plurality of taps supplying a voltage at a different level than a second tap of the plurality of taps;
- determining an estimated pull-out torque based on physical parameters of the polyphase synchronous machine, a power angle, and the applied armature voltage, wherein the power angle is based on real and reactive power monitored at an armature;
- and
- changing the armature voltage being supplied from the power source to the synchronous machine by selecting one of the voltage levels from the plurality of taps of the regulating transformer, the selecting one of the voltage levels being based on the estimated pull-out torque and the determined applied armature voltage to minimize power consumption of the machine while ensuring based on a predetermined confidence level that the pull-out torque of the synchronous machine will not be exceeded.
A system including a regulating transformer having a plurality of taps operative to provide different output voltage levels respectively when connected to a power source, each tap when selected is operable to apply an armature voltage to a polyphase synchronous machine, the system comprising:
- a controller configured to:
- determine an actual applied armature voltage supplied to the polyphase synchronous machine;
- determine an estimated pull-out torque based on physical parameters of the polyphase synchronous machine, real and reactive power monitored at an armature, and the applied armature voltage;
- and
- provide a signal to change the applied armature voltage supplied to the polyphase synchronous machine by selecting, based on the estimated pull-out torque, one of the plurality of taps to minimize power consumption of the machine while ensuring within a predetermined confidence level that a pull-out torque of the machine is not exceeded.
A non-transitory computer readable storage medium comprising instructions which when executed by a processor comprises:
- continuously determining an applied armature voltage supplied to a synchronous machine having an armature, the armature voltage being supplied from a power source via one of a plurality of taps of a regulating transformer, a first tap of the plurality of taps supplying a voltage at a different level than a second tap of the plurality of taps;
- determining an estimated pull-out torque based on physical parameters of the polyphase synchronous machine, real and reactive power monitored at an armature, and the applied armature voltage;
- and
- changing the armature voltage being supplied from the power source to the machine by selecting one of the voltage levels from the plurality of taps of the regulating transformer, the selecting one of the voltage levels being based on the estimated pull-out torque and the determined applied armature voltage to minimize power consumption of the machine while ensuring within a predetermined confidence level that a pull-out torque of the machine is not exceeded.
Dependencies are inferred from the claim text.