Operating Procedure with Generators without an Autostart Function

The generator management system requests the generator.

The Sunny Island triggers a signal generator. The signal generator signals that you should start the generator.

Open, the stand-alone grid is not connected to the generator.

You start the generator (e.g. via a cable pull).

The generator starts.

The generator voltage builds up.

You close the load-break switch between the generator and the Sunny Island.

The generator is connected to the Sunny Island.

The generator voltage is within the configured thresholds for voltage and frequency.

The generator management system starts the warm-up time.

The warm-up time is running.

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The warm-up time ends.

The Sunny Island synchronizes the stand-alone grid with the generator voltage.

The stand-alone grid is synchronized.

The Sunny Island connects the stand-alone grid to the generator.

Closed, the stand-alone grid is connected to the generator.

The generator is connected.

The generator feeds current into the stand-alone grid.

The generator management system starts the minimum run time.

The minimum run time is running.

Even if the generator management system no longer requests the generator, the generator remains connected to the stand-alone grid.

The minimum run time ends.

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The generator management system no longer requests the generator.

The Sunny Island stops triggering the signal generator. The signal generator signals that you should disconnect the generator from the Sunny Island.

You open the load-break switch between the generator and the Sunny Island.

The Sunny Island opens the internal transfer relay.

The Sunny Island continues to supply the stand-alone grid without interruption.

The generator management system starts the minimum stop time.

The minimum stop time is running.

The Sunny Island does not detect when you restart the generator.

The generator management system cannot request the generator. The signal generator is not triggered.

You stop the generator.

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The minimum stop time ends.

The generator management system can request the generator.

The Sunny Island detects a generator start.