Control system for uninterruptible power supplies

摘要

Systems and methods for controlling uninterruptible power supplies (UPSs) are provided. In one example, a system may include an inverter feed path to supply a first amount of power to a load and a bypass feed path to supply a second amount of power to the load. A controller may generate command the inverter feed path and the bypass feed path to vary the first amount of power and the second amount of power based at least in part on an occurrence of a power supply disturbance and a type or severity, or both, of the power supply disturbance.

主权项

1. An uninterruptible power supply system comprising:
a first inverter feed path comprising a rectifier in series with an inverter to supply a first amount of power to a load based at least in part on a first plurality of commands; a first bypass feed path in parallel with the inverter feed path to supply a second amount of power to the load based at least in part on a second plurality of commands; and a controller configured to identify an occurrence and type of a power supply disturbance and to generate the first and second pluralities of commands to vary the first amount of power and the second amount of power based at least in part on an occurrence of an identified power supply disturbance and an identified type of the identified power supply disturbance, wherein the identified power supply disturbance comprises an output current, wherein the controller is configured to:
when the output current of the uninterruptible power supply system exceeds a limit, allow the first bypass feed path to supply power to the load;increment a first counter while the output current of the uninterruptible power supply system exceeds the limit;decrement the first counter while the output current does not exceed the limit; andwhen the first counter has been decremented to a particular value or less, allow the first bypass feed path or the first inverter feed path, or both, to supply power to the load.