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I want to suddenly change wind generator's voltage during dynamic simulation. Please help.

asked 2025-04-24 00:14:31 -0500

vietvu gravatar image

I am working on the IEEE 14-bus system and have replaced one of the generators with a wind turbine using the standard "QT QB limit" and set the WPF to 0.95. The dynamic models used are WT4E1 and WT4G1. In the raw data, I have provided sufficient reactive power reserve (via Qmax and Qmin limits) to allow the reactive power output to vary at least slightly when commanded by the control models. I have attempted to create a step response in reactive power output but was unsuccessful. For this, I ensured that Qflags or Qcontrol mode was assigned and tried changing the Vref and VARS in WT4E1. I also tried changing Qref and Pref but observed no change in the output power plots. Please advise.

Dynamic data sample:

3018 'WT4G1' 1 0.02 0.02 1 0.90 1.11 1.20
2.00 2.00 0.02 /

3018 'WT4E1' 1 0 0 1 0 0.15 18.0 5.00 0.05 0.10 0.00 0.08 1.5 -0.47 1.10 0.00 0.5 -0.5 0.05 0.10 0.90 1.10 120.0 0.05 0.05 1.70 1.11 1.11 /

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answered 2025-04-29 20:15:55 -0500

Tassie Dave gravatar image

The playback model is a handy way to set and vary voltage of an infinite bus machine during simulation. you will find it in the model manual under the name PLBVFU1. To use this model you need to provide a CSV data file containing columns for time, positive sequence voltage and frequency. Something like this:

  0.000,  1.000, 50.000
 10.000,  1.000, 50.000
 10.020,  1.212, 50.000
 20.020,  1.212, 50.000
 20.040,  1.000, 50.000
 25.020,  1.000, 50.000

This produces a transient over volatge between 10.02 sec and 20.02 sec

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Asked: 2025-04-24 00:14:31 -0500

Seen: 114 times

Last updated: Apr 29