The diagram below shows an example of a common DC bus converter system. In
this example the converter consists of one grid-side converter, and two parallel
connected rotor-side converters.
Grid-side converter
to grid
The wind turbine converter line current I
I
and stator current I
ISU
Voltage and current waveforms
Typical line current I
Common
DC bus
I
dc
U
c
.
s
I
line
I
ISU
and line-to-line voltage U
line
Rotor-side converters
to generator
consists of grid-side converter current
line
I
s
Filter
Grid-side
unit
converter
waveforms are shown below.
uv
G
Rotor-side
converter
Hardware description
23