Configuring the Current Limit for the Generator Depending on the Frequency


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The higher the generator current, the higher the torque for the generator. With unregulated generators, the speed of rotation decreases with increasing torque. If the speed of rotation decreases, the frequency of the generator voltage is reduced.

If the frequency of the generator voltage falls below the rated frequency, the generator management can place additional limits on the generator current. The lower the frequency, the more the generator current is limited by the generator management. This setting is useful if the generator is supplying other loads parallel to the Sunny Island. This setting allows the maximum load to be placed on the generator without overloading it.

The basic procedure for changing operating parameters is explained in another section Changing Operating Parameters).

Requirement:

  • The generator must not be an inverter generator. The output frequency of the inverter generator is fixed.

Procedure:

  1. Select Generator > Generator.
  2. Set the parameter Rated generator current to the desired value. Tip: A suitable value for the parameter Rated generator current is 80% of the maximum generator current per line conductor.
  3. Select Generator > Operation.
  4. Set the parameter Limitation type of generator current to Frequency-dependent current limitation. This will activate the frequency-dependent current limiting.