A Novel Method for Reference Signals Generationapplied to Upqc-Phev for Grid Integration of Wecs-Scig

Abstract

This study proposes a combined operation of the Unified Power Quality Conditioner (UPQC) with wind power generation system considering investment cost.  The  proposed  system  consists  of  a series  inverter, a  shunt  inverter  and  an induction generator  connected  in  the  DC  link  through  a  converter.  The  proposed  system  can  compensate  voltage  sag,  voltage  interruption,  harmonics  and  reactive  power. The speed of the induction generator is controlled according to the variation of the  wind  speed  in order  to  produce  the  maximum  output power. The investment cost of proposed system is compared with investment cost of separated use of UPQC and wind energy conversion         system (WECS) and the economic saving due to use of proposed system is estimated. The validity of the proposed system is verified by the       results of computersimulation.