Configuring the Load-Dependent Generator Request


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

Significance of the load-dependent generator request:

If you activate the load-dependent generator request, the Sunny Island requests the generator in the event of a high load. This prevents the battery from deep electric discharging and cycling and extends its service life. The performance of the off-grid system for supplying loads increases to the sum of the generator power and the power of the Sunny Island inverter. This improves the system stability. The load is the average output power of the Sunny Island inverter.

Loads in a three-phase system:

The generator management considers the total load of all phases. It does not monitor single phases in three-phase systems. If the switch-on power limit is exceeded, the generator management requests the generator.

Time-based procedure of the load-dependent generator request:

If the switch-on power limit is reached, the generator management requests the generator. If the load then drops to the switch-off power limit, the generator management resets the generator request after the minimum run time. The generator management does not record the load as an instantaneous value. The generator management calculates the load across the averaging time. The longer the averaging time set, the less the generator management reacts to load peaks (parameter: Generator > Time-controlled generator operation > Average time for generator request via power).

Generator run times:

The warm-up, minimum and power-down times are adhered to after the generator start. The power of the generator is not immediately available in the stand-alone grid. Each start also means that the generator runs for at least the warm-up time, minimum run time and power-down time.

Procedure:

  1. Select Generator > Generator request via power.
  2. Set the parameter Generator request via power on to Enable. This will activate the load-dependent generator request.
  3. Set the parameter Generator startup load limit to the switch-on power limit.
  4. Set the parameter Generator shutdown load limit to the switch-off power limit.
  5. Select Generator > Time-controlled generator operation.
  6. Set the parameter Average time for generator request via power to the averaging time with which the generator management calculates the average power.