Battery Load Allocation in Parallel-Connected Uninterruptible Power Supply Systems

A UPS comprising:

• an inverter configured to transfer power between a battery and a load bus coupled to an output of the UPS;
• and
• a controller operatively coupled to the inverter and configured to determine a difference between a variable indicative of battery capacity for the battery and an average value of the variable for batteries associated with a plurality of UPSs coupled in parallel at the load bus and to adjust a power flow between the inverter and the load bus responsive to the determined difference.

A computer program product for operating subject UPS of a system comprising a plurality of UPSs connected in parallel at a load bus and configured to provide power thereto from respective batteries of a plurality of batteries, the computer program product comprising computer program code embodied in a computer-readable storage medium, the computer program code comprising:

• program code configured to determine a difference between a variable indicative of battery capacity for a battery associated with the subject UPS and an average value of the variable for the plurality of batteries and to adjust a power flow between the subject UPS and the load bus responsive to the determined difference.