System and method for power conversion for renewable energy sources
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United States of America Patent
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May 5, 2015
Grant Date -
May 9, 2013
app pub date -
Nov 5, 2012
filing date -
Nov 4, 2011
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Abstract
A power converter is configured to transfer energy from a photovoltaic (PV) array to a DC bus internal to the power converter. The power converter executes a modulation module to selectively connect one or more switching devices between the output of the PV array and the DC bus. The power converter is configured to operate in multiple operating modes. In one operating mode, the converter operates with a fixed modulation period and a variable on time, and in another operating mode, the converter operates with a variable modulation period and a fixed on time. The improved power converter provides highly efficient low power energy capture, improving power efficiency and enabling energy capture in low light conditions with reduced converter losses.
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