ABB PVS800 Manuel D'exploitation page 9

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Active power limitation from grid frequency
In some grid codes and standards it is required that active power is limited as grid frequency
increases. The PVS800 has an adjustable active power limitation based on measured grid frequency.
An example of such a limitation curve is shown below.
P
LIM
Active power level before limitation
Active limited power
42.10 P FREQ LIMIT 2
44.20 CUT-IN FREQ 42.08 P LIMITING 42.09 P LIMITING 02.18 GRID FREQUENCY
HIGH FREQ 1 FREQ 2
Normally the active power limitation curve is set during commissioning. If the curve is needed to be
changed after commissioning, contact your local ABB representative for further instructions.
Operation with a 1000 V DC voltage (+G411)
With option +G411 the inverter can start with an open loop voltage up to 1000 volts. An operation
range of the maximum power point tracking (MPPT) is increased from 450...750 volts to 450...825
volts.
If the DC voltage rises over a predefined limit (by default, 900 volts) during normal operation (ie, the
inverter is in the MPPT mode), the inverter will stop operation and go to the SLEEP mode. This may
be caused by active power limitation or incorrect solar array sizing.
Active power ramp-up after a grid fault
If the PVS800 ends up with a grid fault and a new start is made after a fault reset, it is possible to limit
active power with a ramp. When a fault has been cleared by resetting and the PVS800 has been
started again, it is possible to ramp up active power with ramp time 42.05 RESTR ACTPOW GRD1.
Grid faults are LVRT faults, external grid monitoring faults and NAMU grid monitoring faults. These
faults are listed below:
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