Solar and Wind powered Stand Alone Water Pumping system

Abstract

The   purpose   of   the   article   is   to   verify   the performance  of  a  wind  and  photovoltaic  (PV)  hybrid  plant  with battery  bank  for  water  pumping.  The system  can  be used  inisolated areas without access to electricity grid. The  plant  is  installed  at  the  Federal  University  of  Ceará,  in Fortaleza,  Brazil.  The  plant  consists  of  a  wind  turbine  (1  kW  - permanent  magnet)  and  4  polycrystalline  PV  modules  (87  Wp each),   5   batteries   (150   Ah   each)   and   1   power   electronic converter  (1  kW).  A  datalloger  is  used  for  acquisition  and storage  of  data  (wind  speed,  global  irradiance,  water  flow  and electrical  data).  The  present  study  uses  data  from  four  non-consecutive days  in  November/2014 and December/2014; in the first day only PV and the battery bank supply the load.    The   recorded   mean   flow   was   25.26   L/min,   showing   little variation,  even  with  intermittence  of  the  resources,  condition minimized  by  the  energy  storage.  As  a  consequence  of  the energy  storage,  the  hybrid  system  shows  low  operation  request, enhancing  the  life  cycle  and  consequently  reducing  the  plant replacement costs.