GE AC Instalation and operation manual V10.docx
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PR ω0
PWM x3
Σ
PR ω1
PR ω2
PR ω3
...
Feedback
+
-
KR
KFF
Setpoint
generator
Therefore, the main characteristics of the Resonant Control applied are the ones listed below:
-
Control loop rate of 15 kHz.
-
Harmonics controlled up to 800Hz (1-15
th
with f
0
=50Hz, 1-13
th
with f
0
=60Hz, only
fundamental for 400Hz)
-
15 control loops executed per phase.
-
45 control loops executed in total (for the 3 phases).
-
Each control loop controls independently magnitude and angle of one harmonic.
-
Any kind of grid can be implemented in the EUT side.
-
All harmonics can be suppressed in the grid side.
* It should be noted that the equipment bandwidth is 800 Hz. Therefore, the harmonic content
will be determined by the bandwidth as well as by the fundamental frequency specified by the
user. Even harmonics 10, 12 and 14 cannot be configured by user.
Finally, the following picture is an example of how the GE Resonant Control manages to control
harmonics:
