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APPARATUS AND METHOD FOR CHARGING AND DISCHARGING PHOTOVOLTAIC PCS INTEGRATED BATTERY

  • US 20110273130A1
  • Filed: 10/07/2010
  • Published: 11/10/2011
  • Est. Priority Date: 05/06/2010
  • Status: Active Grant
First Claim
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1. An apparatus for charging and discharging a photovoltaic PCS integrated battery, comprising:

  • a first DC/DC converter that converts PV voltage from a solar cell into a predetermined DC voltage according to a first DC/DC control;

    a DC/AC inverter that is connected to a system and performs system voltage/DC voltage conversion or DC voltage/system voltage conversion according to a second DC/DC control;

    a DC link unit that is connected in common to an output terminal of the first DC/DC converter and an output terminal of the DC/AC inverter to stabilize DC voltage from the first DC/DC converter and DC voltage from the DC/AC inverter;

    a second DC/DC converter that is connected between the DC link unit and a battery to convert voltage bidirectionally according to a second DC/DC control;

    a voltage/current detector that detects PV voltage/current from the solar cell, battery voltage/current from the battery, system voltage/current from the system, and DC link voltage/current from the DC link unit; and

    a charging control unit that determines one of a plurality of predetermined control modes based on the voltage and current detected in the voltage/current detector and controls the first DC/DC converter, the second DC/DC converter, and the DC/AC inverter according to the determined control mode.

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