131
12.2.2 For Countries except "IT"
RReessppoonnssee ttoo aann iinnccrreeaassee iinn ggrriidd ffrreeqquueennccyy
All countries support the overfrequency response.
When there is an increase in grid frequency which
exceeds the Start value (
50.25 Hz
), the inverter will
reduce the power output linearly with an increase of
frequency until the End value (
52.00 Hz
) is reached.
When the frequency exceeds the End value, the
inverter output shall be ceased (i.e. 0 W).
Table 12-3 Default Values of Overfrequency Response Parameters
PPaarraammeetteerr AAUU,, NNZZ BBRRAA
TTHH
SSAA
AATT,, DDEE,, NNLL,, BBEE,, LLUUXX
OverFrq Start
(Hz)
50.25 60.50 51.00 50.50 50.20
OverFrq End
(Hz)
52.00 62.00 52.00 52.00 51.50
Take Australia ("AU") as an example. The output power will remain at or below the
lowest power level reached in response to an overfrequency event between 50.25 Hz
and 52 Hz. This is to provide hysteresis in the control of the inverter. When the grid
frequency has decreased back to 50.15 Hz or less for at least 60 s, the power level will
be increased at a rate no greater than the power ramp rate limit, which can be set
according to "10.4.8 Setting the Protective Parameters".
FFiigguurree 1122--44 Frq-Watt Mode for Overfrequency Conditions ("AU")
RReessppoonnssee ttoo aa ddeeccrreeaassee iinn ggrriidd ffrreeqquueennccyy
Only countries "AU" and "NZ" support the underfrequency response.
User Manual 12 Appendix III: Active Power Response
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