Continuous power supply control system and method
AssigneeS&C Electric Company
InventorRaymond O'Leary
Life of this patent
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Abstract
A control system and method of controlling an uninterruptible power supply (UPS) system prevents a load anomaly, such as transformer DC offset, resulting from a supply disruption, such as a voltage sag, by modifying the UPS supplied power curve. The UPS supplied power curve maintains a predetermined power for a predetermined duration to cause the UPS supplied power curve to depart from normal supply curve post sag detection. Following the predetermined duration, the UPS supplied power curve is conformed to the normal power supply curve until restoration of the source power supply or engagement of a secondary power source.
Claims18
A method of controlling an uninterruptible power supply comprising:
- determining the occurrence of a power disruption in a power supply to a load, the power disruption of the type resulting in an anomaly in the load;
- supplying power from a stored power source at a value different than a normally supplied value for a duration sufficient to substantially eliminate the anomaly.
A method of controlling an uninterruptible power supply comprising:
- determining the occurrence of a voltage sag in power supplied by a source power supply to a load;
- and
- providing power from a stored power supply at a voltage value different than a normally supplied voltage value for a duration sufficient to substantially eliminate a load offset resulting from the voltage sag.
An uninterruptible power supply comprising:
- a stored power supply;
- a controllable switch for switching a load between a source power supply and the stored power supply;
- and
- a controller for controlling operation of the controllable switch and the supply of power from the stored power supply to the load, wherein the controller is operable to cause power to be supplied from the stored power supply to the load via the controllable switch following detection of a disruption in the source power supply at a value different than a normally supplied value for a duration sufficient to substantially offset a load anomaly resulting from the disruption.
Dependencies are inferred from the claim text.