Performance Evaluation of Microgrid Management Function in KERI pilot plant

Abstract

As  usual,  the  microgrid  operates  in  grid-connect mode,  but,  when  a  fault  occurs  in  the  upstream  grid,  it  should disconnect  and  shift  into  islanded  operation  mode.  In  grid-connect  mode,  the  controlling  power  flow  at  PCC  is  necessary management  function  rather  than  the  frequency  and  voltage. However, the controlling the frequency and voltage is asked in islanded    mode.    To    achieve    these    management    goals appropriately,    the    cooperative    control    strategy    among microsources  is  needed.  This  supervisory  control  action  is executed   at   MMS.   In   this   paper,   the   cooperative   control strategy   of   microgrid   components   is   presented   and   the management performance is evaluated by using microgrid pilot plant.  The  pilot  plant  consists  of  the  PV,  PV/Wind  Hybrid system,  BESS,  diesel  generators,  and  RLC  loads,  which  are connected to 380V low voltage lines. The test results show that the  proper  control  strategy  can  ensure  stability  of  microgrid  in islanded  mode  and  maintain  the  power  flow  of  PCC  at  desired value successfully.