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Having trouble plotting wind machine P, Q and slip in dynamic simulations

asked 2017-06-20 06:47:51 -0600

CamillusRex gravatar image

So I'm running a dynamic study in PSSe, trying to investigate the effects of wind farm modelling on system stability. Some of the first results I've gotten are rather counter-intuitive, so I'd like to probe a little deeper into what's going on -- for example, by looking at the P and Q infeed from the wind farms, as well as the slip (speed deviation) of induction-type wind generators (WT1 and WT3). However, PSSe refuses to cooperate.

  • When I use CHSB with PELEC and QELEC as the parameters to add, it simply skips over my wind machines.
  • When I explicitly try to add the parameters of specific wind machines using MACHINEARRAYCHANNEL, the channels do show up in the output .txt file, but all values are 0.
  • When I try to add the generator speed deviation with STATE_CHANNEL (it's a state in both the WT12T1 and WT3T1 models), again the channels show up but with all values at 0.

Is anyone familiar with these issues and do you know a way around them? I'm using PSSe 33.9. Many thanks for any help you guys can provide!

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answered 2017-06-29 03:20:52 -0600

CamillusRex gravatar image

Issue fixed. I was being an idiot and forgot to change the bus type code from "load" to "generator" when I added wind machines... which understandably confused PSSe. It works as it should now.

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answered 2017-06-20 19:40:34 -0600

oppossumX gravatar image

I have used version 33.9 to capture PELEC and QELEC with the WT3 wind models before without issue. In PSSE versions >33.5 you need to ensure the wind control mode flag in the machine powerflow model is not 0 when using the WT3 dynamic models for the machine.

I typically use the "Machinearraychannel" API function to define channel:

psspy.machine_array_channel([_i, channel, bus], id, _s)

Where channel=2 for PELEC, bus is the bus number of the wind machine and id is the id of the wind machine

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Yeah, that's what I'm trying too, and I do have the wind control mode flags set properly... Still I'm seeing 0 everywhere. :/ Thanks for the reply though!

CamillusRex gravatar imageCamillusRex ( 2017-06-22 04:16:59 -0600 )edit

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Asked: 2017-06-20 06:47:51 -0600

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Last updated: Jun 29 '17