Sungrow SG2K-S User Manual page 21

User Manual
than 62 Hz, the inverter will reduce the active power export to grid according
to the following equation:
Where:
△
−
P is the variation of active power export to grid (in %) related to the active
power export to gird at the moment frequency surpass 60.5 Hz.
− f
is the grid frequency.
grid
− f
is the nominal grid frequency.
nominal
− R is the desired reduction in active export power (expressed in % of Hz),
adjusted in -40 % per Hz.
− P
, at the time of exceeding the mains frequency of 60.5 Hz, value is
max
frozen.
Please see the following figure for the curve of PV system responding to
frequency changes.
P/Pmax [%]
100
40
Fig. 2-8 Power Reduction Curve for Over-frequency
− If the grid frequency suddenly reduces after this reduction power procedure
begins, the inverter will remain with the minimum export power (P
during the frequency increase process. The inverter will only increase the
export active power if the grid frequency returns to 60 Hz +/- (0.05 Hz) for at
least 300 seconds.
− When returning back to normal, the export power will increase at most 20 %
per minute (20 % of Nominal Power (P
full power.
(3) After the high frequency, the inverter will only reconnect to the grid again
when the grid frequency returns to 60.1 Hz, respecting the reconnection
waiting time of 300 seconds. The export power will grow in a rate up to 20 %
per minute of P
For Country Mexico (Code "MX")
Nominal frequency of Mexican grid is 60 Hz.
The inverters can operate within the frequency limits defined in the following
table.
△
P = [f
grid
P1 P2
57.5 60.1
60.5
per minute.
max
x (f +0.5)] x R
nominal
P3
P4
61 61.5
)) until its normal back again with
max
2 Product Introduction
P5
62.0
F [Hz]
△
-
max
P )
max
13