GE AC Instalation and operation manual V10.docx
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4.3.1.
Constant Voltage (CV)
This mode allows the user to define and generate a specific grid.
Parameters and limits (AC mode)
In CV mode, the user can modify the value of the following emulated grid parameters as long as
it is within the specified range:
Parameter
Allowed range of values
Grid frequency
10-400 Hz
V
peak
, phase-neutral
400V
V
rms
, ph-n
25-277Vrms (if f
0
≤100Hz)
25-210Vrms (if f
0
>100Hz f
0
≤200Hz)
25 - 150Vrms (if f
0
>200Hz)*
V
rms
, max, ph-ph
480Vrms (if f
0
≤100Hz)
360Vrms (if f
0
>100Hz f
0
≤200Hz)*
260Vrms (if f
0
>200Hz)
Grid virtual resistance
0 -0.5 Ω
Fundamental harmonic angle (respect the 120°
delay of each phase)
0 -360 °
Fundamental harmonic voltage (phase-N)
0-277 Vrms
* f
0
is the frequency of fundamental wave.
Harmonic control
The bandwidth of the harmonic control is fixed to 800Hz. Depending on the fundamental
frequency the high harmonics must be disabled because exceed the 800Hz (p.e. 15
th
harmonic
of 60Hz fundamental grid becomes 900Hz).
The enabled harmonic controls can enable or disable on different conditions:
f
0
≤51Hz: 1, 2, 3, 4, 5, 6, 7, 9, 11 ,13, 15
51Hz <f
0
≤60Hz: 1, 2, 3, 4, 5, 6, 7, 9, 11, 13
f
0
>100Hz: 1 (only fundamental wave)
Harmonics from 15
th
to 11
th
are
automatically
disabled if the output is unstable.
Harmonics from 15
th
to 2
nd
can be
manually
disabled
During faults (voltge dips, flicker, ...) the harmonic control is automatically disabled.
Thus, the harmonic content during the fault is basically the same as before the fault
(with some phase delay and minor magnitude variation)
