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APPARATUS AND METHOD FOR VOLTAGE AND CURRENT BALANCING IN GENERATION OF OUTPUT POWER IN POWER GENERATION SYSTEMS

  • US 20150035371A1
  • Filed: 07/29/2014
  • Published: 02/05/2015
  • Est. Priority Date: 07/31/2013
  • Status: Active Grant
First Claim
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1. An apparatus for voltage balancing a plurality of parallel arranged direct current (DC) voltage source strings in a power generation system, comprising:

  • at least one string voltage balancing circuit, each string voltage balancing circuit comprising;

    at least two reverse blocking switches each adapted to control a current flowing in and an output voltage of one or more corresponding DC voltage source strings; and

    at least two capacitors each communicatively connected to a corresponding at least one reverse blocking switch and communicatively connected in series with a corresponding one of the plurality of DC voltage source strings, each capacitor being adapted to construct a voltage difference for a corresponding one of the plurality DC voltage source strings,wherein the at least one string voltage balancing circuit selectively adjusts an output voltage of each of the DC voltage source strings by selectively controlling a current flowing in corresponding ones of the plurality of DC voltage source strings to selectively adjust a voltage constructed across corresponding ones of the at least two capacitors to balance the output voltage for each of the DC voltage source strings to be substantially the same output voltage.

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