7 Commissioning
SMA Solar Technology AG
Operating manual
SI44M-80H-13-BE-en-15
100
7.8.4.7
Setting an External Generator Request
Relevant for off-grid systems
An external control signal can transmit a generator request to the generator management.
The basic procedure for changing operating parameters is explained in another section (see Section 8.6, page 113).
Procedure:
1. Select
Generator > Generator request via digital input
.
2. In order to activate the external generator request, set the parameter
Reaction to digital input of generator
request
to
Enable
.
3. In order to deactivate the external generator request, set the parameter
Reaction to digital input of generator
request
to
Disable
.
7.8.5
Configuring the Procedure in the Event of a Generator False Start
Relevant for off-grid systems
Operating procedure if a generator false start is detected:
If the Sunny Island detects a generator false start (e.g., voltage too high), the Sunny Island does not connect the stand-
alone grid to the generator. If there is another request for the generator after the minimum stop time, the Sunny Island
attempts to start the generator. If the Sunny Island detects a false start on numerous occasions and the number of failed
attempts exceeds the maximum value, the Sunny Island switches into error status. The Sunny Island attempts to restart
the generator upon expiry of the
Idle period after generator fault
.
Single cluster systems:
The generator management classes a line conductor fault on the master as a generator failure. All Sunny Island
inverters disconnect the stand-alone grid from the generator. The generator management treats a fault on the slave line
conductor as a line conductor fault. The slave disconnects only the affected line conductor from the stand-alone grid.
The slave switches the stand-alone grid to the generator again if the faulty line conductor is in the valid range.
Procedure:
The basic procedure for changing operating parameters is explained in another section (see Section 8.6, page 113).
1. Select
Generator > Generator
.
2. Select the parameter
Automatic generator start
.
3. Activate the automatic generator start and set the desired number of start attempts.
4. In order to change the idle time of the generator after the maximum number of start attempts has been exceeded,
select
Generator > Operation
and set the parameter
Idle period after generator fault
to the desired stop
time.
7.9
Off-Grid System
7.9.1
Commissioning the Battery Current Sensor in Off-Grid Systems
Relevant for off-grid systems
To operate the battery current sensor, you must set the type of the battery current sensor and start the adjustments of
the battery current sensor.
