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Distributed power supply system and method

  • US 9,502,893 B2
  • Filed: 11/15/2012
  • Issued: 11/22/2016
  • Est. Priority Date: 09/20/2012
  • Status: Active Grant
First Claim
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1. A distributed power supply system, comprising:

  • a plurality of power storage units;

    a plurality of DC power supply units, each particular DC power supply unit of the plurality of DC power supply units corresponding to one particular power storage unit of the plurality of power storage units, each particular DC power supply unit being operable in at least one of;

    a first mode when the particular DC power supply unit receives mains power, the particular DC power supply unit converts mains power to DC power and provides DC power to at least one electrical device coupled to the particular DC power supply unit; and

    a second mode when the particular DC power supply unit does not receive mains power, the particular DC power supply unit draws DC power from its corresponding power storage unit and provides DC power to the at least one electrical device coupled to the particular DC power supply unit; and

    a power supply controller in communication with each of the plurality of power storage units, the power supply controller configured for controlling output power of each of the plurality of power storage units by optimizing output power of each of the plurality of power storage units based on status of charge (SOC) C and load L of each of the plurality of power storage units,wherein optimizing output power of each of the plurality of power storage units based on SOC and load of each of the plurality of power storage units further comprises;

    for each power storage unit i of the plurality of power storage units, determining whether power storage unit i have sufficient SOC based on Ci

    Li

    Cthreshold and calculating a supplemental power Δ

    Li=Li

    Ci+Cthreshold when power storage unit i have insufficient SOC;

    determining an optimal solution for an optimization function defined as;

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