Figure 5.2 Voltage droop graph for the example
210.0
211.0
212.0
213.0
214.0
215.0
216.0
217.0
218.0
219.0
220.0
0 100 200 300 400 500 600 700 800 900 1000
Voltage
[V]
Reactive power [kvar]
Droop = (220.0 - 211.3) / (985 - 0) × 1000 / 220 × 100 = 4.0 %
5.4.7 Adjusting voltage droop
As far as possible, the voltage droop must be the same for all the generators, since this gives the system natural stability
when running under switchboard control, or if the controller loses power. That is, the voltage droop must be the same for all
the gensets. Once you have measured the droop of each generator (as described previously), you can adjust each AVR
accordingly.
Adjusting the droop for an electronic AVR
Program the droop that is needed in the electronic AVR. Refer to the AVR supplier for information on how to do this.
PPU 300 Commissioning guidelines 4189341106 UK
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