If you can change the load, create power changes during tuning as follows:
1. Deactivate switchboard control.
2. Increase or decrease the load, and observe the response of the power to the regulator. Use the observation to tune the
regulator.
If you cannot change the load, create power changes during tuning as follows:
1. Activate switchboard control.
2. Use the switchboard GOV up or GOV down controls to increase or decrease the power provided by the genset.
3. Deactivate switchboard control, and observe the response of the power to the regulator. Use the observation to tune the
regulator.
P weight
If P weight is 100 %, the controller ignores the frequency set point to achieve the power load sharing set point. If P weight is
0 %, the controller ignores the power load sharing set point, to achieve the frequency set point.
DEIF recommends that you start with the default value, and then, if necessary, adjust this parameter. If P weight is too low,
the load sharing will not be effective and the load will float between the controllers. If P weight is too high, the frequency
regulation will be too slow, for example, when a new large load connects.
6.5 Tuning AVR regulators
6.5.1 Tuning for voltage regulation
To tune the voltage regulation, the genset must be the only equipment that is connected to the busbar.
Tune the voltage regulation using the Tuning P regulation procedure for relay outputs, and Tuning PID regulation for
analogue outputs.
Create voltage changes during tuning as follows:
1. Activate switchboard control.
2. Use the switchboard AVR up or AVR down controls to increase or decrease the voltage by 5 % of the nominal voltage.
3. Deactivate switchboard control, and observe the response of the voltage to the regulator. Use the observation to tune the
regulator.
6.5.2 Tuning for reactive power regulation
To tune the reactive power regulation, the genset and at least one other genset must be connected to the busbar. The
regulation of the other genset must be stable.
Tune the reactive power regulation using the Tuning P regulation procedure for relay outputs, and Tuning PID regulation
for analogue outputs.
Create reactive power changes during tuning as follows:
1. Activate switchboard control.
2. Use the switchboard AVR up or AVR down controls to increase or decrease the reactive power provided by the genset.
3. Deactivate switchboard control, and observe the response of the reactive power to the regulator.
PPU 300 Commissioning guidelines 4189341106 UK
www.deif.com Page 55 of 75
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