Operation Manual

Protect PV.250 Operating Instructions
Page 21 of 51 80000027023 BAL, en
Change of status to linked operation:
The system switches to linked operation when the fault message is
acknowledged in the inverter affected by the fault.
The inverter affected by the fault is switched off logically once the
fault has been acknowledged.
4.5.4 Partner Operation During the Course of the Day
Early morning:
The tie switch is closed from the previous day. Overnight, a deci-
sion has been made as to which inverter will be switched on logi-
cally in linked operation on this day and which will be switched off
logically. If the sequence control (see Chapter 4.1) of both invert-
ers now switches from the "Night" status to the "Waiting" status,
one inverter is switched off logically. The other inverter is switched
on logically and feeds power into the mains subject to sufficient
levels of insolation.
"Linked operation" is active.
Later that morning:
Insolation increases. As a result, the inverter feeding power into
the mains works at increased capacity. If capacity utilisation rises
above a certain value, the system switches to single operation.
The tie switch opens and the inverter which is switched off logically
is switched on.
"Single operation" is active.
Evening:
Levels of insolation fall during the course of the day. The capacity
utilisation at which the two inverters are working drops as a result.
If the capacity utilisation of the two inverters falls below a certain
value, the system switches to linked operation. The tie switch is
closed and one inverter is switched off logically.
"Linked operation" is active.
Later in the evening:
Levels of insolation fall further. Capacity utilisation drops as a re-
sult. If capacity utilisation falls below a certain value, sequence
control on both inverters switches to the "Night" status. Power
stops being fed into the mains.
"Linked operation" is active.
Night:
Overnight, a decision is made as to which inverter is to be active in
linked operation the next day. So that both inverters work at ap-
proximately the same capacity, the inverters are operated alter-
nately.
4.5.5 Partner Operation Parameters
Load threshold for terminating the INV connection:
If capacity utilisation in linked operation rises above the parameter
value, the system switches to single operation.
Load threshold for connecting the INV:
If capacity utilisation in single operation falls below the parameter
value, the system switches to linked operation.