Multi-Input Boost Converter for Parallel Connected Renewable Energy Systems

Abstract

This  paper  proposes  a  multi-input  boost  converterfor  parallel  connected  renewable  energy  systems.  The  proposedconverter   simultaneously   harnesses   power   from   two   parallelconnected  renewable  energy  sources  while  maintaining  constantoutput   voltage.   The   operation   of   the   converter   is   examinedand  its  operating  modes  are  developed.  The  small-signal  acmodel  of  the  proposed  converter  is  developed  in  continuousconduction  mode  by  circuit  averaging  technique.  Based  on  thedeveloped  small-signal  ac  model,  line-to-output  and  control-to-output transfer functions are derived and the relevant Bode plotsare obtained analytically and are verified by circuit simulation forevaluating  open-loop  and  closed-loop  stability  of  the  converter.The analytical results are in good agreement with the computerresults,  validating  the  developed  small-signal  ac  model  and  thederived  transfer  functions.