Comparison of Reference Current Generation Schemes for Distributed Generation Units under Unbalance Faults
This paper investigates different current generation schemes for controlling positive and negative sequence
currents of distribution generation units under unbalanced grid voltage conditions. A comparison of the reference current
generation schemes, for a grid connected converter, during normal operation and unbalanced grid fault condition is also
presented. This study may provide a performance evaluation of different reference current generation techniques and can
help in the selection of suitable control during significant grid faults. PSCAD/EMTDC based simulation study is conducted
to evaluate the performance of the current generation schemes.
Index Terms—Microgrid, Grid connected control, Unbalanced faults, positive and negative sequence extraction