Abstract:
This paper investigates the dynamic performance of an active
rectifier integrated into a wind park. The small changes in the
DC current and the DC voltage are examined. The small
variations are caused by the miniature power flow unbalance
between the offshore wind park and the grid land. Internal DC
collector is considered into the wind park, which provides an
internal DC medium voltage bus. The AC output signal from
the wind generator to the internal DC collector or DC bus is
regulated through active rectifier. An active rectifier is a
cascade connection of an uncontrolled full bridge diode
rectifier and a controlled DC-DC boost converter. The small
changes in the DC current and DC voltage due to power flow
unbalance are analysed across the boost converter. The way in
which these small variations affect the internal medium DC
voltage is determined. The results are presented in the form of
small signal transfer functions and are evaluated with
MATLAB software.
