Deif ASC 150 Solar - Modes of Operation; Island Operation

4. Modes of operation
Operate the ASC Solar controller in AUTO mode or  mode. In AUTO mode, the controller automatically starts
and stops the PV, and controls the power automatically. In  mode, the operator or an external signal can open
and close the PV breaker, and start the system.
4.1 Island operation
The PV system  is non-grid forming. The system can supply the load in island mode if there is a grid-forming source in
the application, for example, a genset. Use the ASC Solar controller to maintain a minimum genset load and support the
generator with reactive load when needed.
G
Consumers
PMS
V
I
V
V
I
V
AGC Genset
ASC Solar
AUTO mode
1. Select AUTO mode.
2. The PV breaker closes automatically when the voltage and frequency are OK.
3. Activate a start signal for the 
• Use a digital input or
• Use a time-dependent start command.
4. The PV system starts.
5. When the PVS is ready, the grid-forming source ramps down to the minimum load. The PVS supplies the remaining load.
6. If the PVS cannot supply the load, the genset supplies the extra load.
7. To stop the PVS, activate a stop signal.
• Use a digital input or
• Use a time-dependent stop command.
8. The PVS stops.
SEMI-AUTO mode
1. Push the Close breaker
button to close the PV breaker.
2. Push the Start button on the controller to start the PVS.
3.
To stop the PVS, push the Open breaker
button to open the breaker and stop the PVS.
OPERATOR'S MANUAL 4189341347A EN
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