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ENERGY STORAGE SYSTEM AND METHOD OF CONTROLLING THE SAME

  • US 20110140520A1
  • Filed: 08/11/2010
  • Published: 06/16/2011
  • Est. Priority Date: 12/16/2009
  • Status: Abandoned Application
First Claim
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1. An energy storage system comprising:

  • a maximum power point tracking (MPPT) converter converting power generated by a renewable power generation system and outputting the converted power to a first node;

    a bi-directional inverter, connected between the first node and a second node, the second node being connected to a grid and a load, converting a first direct current (DC) power input through the first node to an alternating current (AC) power and outputting the AC power to the second node, and converting an AC power from the grid to the first DC power and outputting the first DC power to the first node;

    a battery for storing a second DC power;

    a bi-directional converter, connected between the battery and the first node, converting the second DC power output from the battery to the first DC power and outputting the first DC power to the bi-directional inverter through the first node, and converting the first DC power output from the bi-directional inverter through the first node to the second DC power; and

    an integrated controller sensing an electrical failure signal of the grid and controlling the second DC power stored in the battery to be transferred to the load when the electrical failure signal is received.

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