Technical Application Papers No.10 Photovoltaic plants - ABB

Figure 3.10
PV field
Subfield
switchboards
Q1-1
Q1-2
Q1-3
Q1-4
Disconnection of the inverter must be possible both on
the DC side as well as on the AC side, so that maintenance
is allowed by excluding both the supply sources,
that is PV generator and grid.
String paralleling switchboard
String paralleling switchboard
String paralleling switchboard
String paralleling switchboard
To the switchboard Q7 - 1
To the switchboard Q6 - 1
To the switchboard Q5 - 1
To the switchboard Q4 - 1
To the switchboard Q3 - 1
To the switchboard Q2 - 1
To the switchboard Q7 - 2
To the switchboard Q6 - 2
To the switchboard Q5 - 2
To the switchboard Q4 - 2
To the switchboard Q3 - 2
To the switchboard Q2 - 2
To the switchboard Q7 - 3
To the switchboard Q6 - 3
To the switchboard Q5 - 3
To the switchboard Q4 - 3
To the switchboard Q3 - 3
To the switchboard Q2 - 3
To the switchboard Q7 - 4
To the switchboard Q6 - 4
To the switchboard Q5 - 4
To the switchboard Q4 - 4
To the switchboard Q3 - 4
To the switchboard Q2 - 4
Field
switchboards
Inverter
Inverter
Inverter
Inverter
Inverter paralleling
switchboard
Besides, as shown in Figure 3.10, it is advisable to install
a disconnecting device on each string, so that verification
and maintenance operations on each string are
possible without putting out of service the other parts
of the plant.
Photovoltaic plants
31
3 Installation methods and configuration