Parallel control of multiple uninterruptable power modules (“UPMs”)

摘要

Systems, methods, and devices of the various embodiments enable parallel control of multiple uninterruptable power modules (“UPMs”) connecting multiple power sources to a bus in parallel. A UPM may be comprised of at least one controller coupled to at least one inverter, and the UPM may be configured to convert the DC voltage output from a DC source to an AC voltage, such as an AC voltage suitable for output to an AC bus. A UPM may receive a power sharing command and control its at least one inverter based at least in part on the received power sharing command to output a voltage to a bus.

主权项

1. A system, comprising:
an alternating current (AC) bus; a first direct current (DC) power source; and a first uninterruptable power module (UPM) connecting the first DC power source to the AC bus, the first UPM comprising:
a first plurality of inverters; anda first processor connected to the first plurality of inverters, wherein the first processor is configured with processor-executable instructions to perform operations comprising:
receiving a power sharing command from an input controller; andcontrolling the first plurality of inverters to convert a DC output of the first DC power source to an AC output provided to the AC bus based at least in part on the received power sharing command; wherein: the received power sharing command indicates an allocated portion of a load demand to be met by the first UPM; and the first processor is configured with processor-executable instructions to perform operations such that controlling the first plurality of inverters to convert the DC output of the first DC power source to the AC output provided to the AC bus based at least in part on the received power sharing command comprises:
generating a required current command based at least in part on a voltage of the AC bus;multiplying the received power sharing command with the generated required current command to generate an output current command; andsending the output current command to the first plurality of inverters to control the first plurality of inverters to convert the DC output of the first DC power source to the AC output provided to the AC bus to meet the allocated portion of the load demand.