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DISTRIBUTED POWER SUPPLY SYSTEM

  • US 20120262957A1
  • Filed: 10/11/2011
  • Published: 10/18/2012
  • Est. Priority Date: 10/14/2010
  • Status: Active Grant
First Claim
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1. A distributed power supply system, comprising:

  • an inverter circuit that converts a direct current power generated by a direct current power supply to an alternating current power, and that supplies the alternating current power to a power system having a three-phase alternating current power supply;

    a voltage detector that detects system voltage of the power system; and

    an inverter control circuit for carrying out a PWM control by the inverter circuit,wherein the inverter control circuit includes a three-phase voltage command signal generation unit that comprises;

    a three-phase fundamental wave command signal generation unit that generates three-phase fundamental wave command signals from two phase components of voltage detected by the voltage detector; and

    a third harmonic signal generation unit that adds together respective third harmonics of said three phase fundamental wave command signals each having a predetermined amplitude that are calculated based on said three-phase fundamental wave command signals to generate a third harmonic signal,wherein the three-phase voltage command signal generation unit adds said third harmonic signal to the three-phase fundamental wave command signals, respectively, thereby generating three-phase voltage command signals.

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