SMA SI 3.0-11 Installation - Manual (Page 83)

SMA Solar Technology AG 8 Commissioning
Installation Manual SI30M-44M-60H-80H-IA-en-30 83
8.4 Generator Management
8.4.1 Configuration of the Thresholds for Generator Connection
8.4.1.1 Changing the Current Thresholds for the Generator
Significance of the current limits:
The generator management limits the consumption of generator current to the maximum set value.
In three-phase systems, the generator current is limited for each line conductor individually. The set value applies to each
line conductor.
For Sunny Island inverters that are operated in parallel, the generator management only limits the total generator current.
The generator current may be unequally distributed to the Sunny Island inverters. If a Sunny Island fails, for example,
more current flows through the remaining Sunny Island inverters.
Enhanced generator management:
If the set generator current is not sufficient for supplying the loads, the generator management requests additional current
from the battery. The system then supplies the loads with the generator current and the battery current.
Procedure:
1. Switch to installer mode on the Sunny Remote Control (see the Sunny Island inverter operating manual).
2. Select the parameter 234.03 GnCurNom and set to the desired value. Tip: A suitable value for the parameter
234.03 GnCurNom is 80% of the maximum generator current per line conductor.
8.4.1.2 Changing the Voltage Thresholds for the Generator
The voltage thresholds determine the range within which the generator voltage is allowed to fluctuate.
When the Sunny Island switches to the generator, the stand-alone grid will also fluctuate within this range.
A breach of the set voltage thresholds leads to disconnection of the line conductor from the stand-alone grid or the
generator not being switched on.
Procedure:
1. Switch to expert mode on the Sunny Remote Control (see the Sunny Island inverter operating manual).
2. Select the parameter 234.01 GNVtgMin and set to the minimum generator voltage.
3. Select the parameter 234.02 GNVtgMax and set to the maximum generator voltage.
8.4.1.3 Changing the Frequency Thresholds of the Generator Voltage
The frequency thresholds determine the range within which the frequency of the generator voltage is allowed
to fluctuate. When the Sunny Island switches to the generator, the stand-alone grid will also fluctuate within
this range.
A breach of the set frequency thresholds leads to disconnection of the line conductor from the stand-alone grid or to the
generator not being switched on.
Procedure:
1. Switch to expert mode on the Sunny Remote Control (see the Sunny Island inverter operating manual).
2. Select the parameter 234.04 GnFrqNom and set to the rated frequency of the generator voltage.
3. Select the parameter 234.05 GnFrqMin and set to the minimum frequency of the generator voltage.
4. Select the parameter 234.06 GnFrqMax and set to the maximum frequency of the generator voltage.