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# How to incorporate wind speed variation and turbulence spectrum into PSSE load flow and dynamics studies?

For renewable simulation of South Australian Grid with Type-3 wind power plants, I've two wind machines of 50 MW each and used the following dynamic models so far:

1. Generator model: WT3G2
2. Electrical model: WT3E1
3. Mechanical model: WT3T1
4. Pitch model: WT3P1


As I've seen, the wind power plants basically act as constant power source of 50 MW as no wind speed variability is incorporated. From this paper I've seen that the wind speed variability was modelled using Bivariate Weibull distribution (1) and Turbulence was modelled using Kaimal Spectrum (2).

My question is: how do I model these 2 things into my PSSE simulation? Where and how do I add them?

N.B. I'm using PSSE Xplore 34 which allows me to include the following models as well:

• Aerodynamic model: WT12A1, WTARA1
• Torque control model WTTQA1
• Auxiliary (plant control) model: REPCA1, REPCTA1

Sadly, no Gust models available.

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## 1 answer

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As far as I know, you can write code to change the output of each wind farm before solving the power flow to simulate the power system in different wind power output scenarios.

But you might not do this during the dynamic simulation, that is to say during dynamic simulation, you can not change the wind power output incurred by the change of wind speed, it seems that PSSE does not have this function.

If you want to change before solving power flow, you can just change the Pgen(MW) of the wind power in the GUI under the machine data window, then solve the power flow. For code, use " psspy.machinechng2(i, id, intgar, realar) " ( please find the detailed introduction in API.pdf).

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## Comments

Thank you, Gary22212. I understand that I can not change the wind power output during dynamic simulation as the sources are converted. But how do I change the MW output 'before' power flow? Do you have any code example that accomplishes this? Thanks in advance!

( 2019-08-29 13:05:54 -0500 )edit
1

Try to use the GE wind models which are now present in the psse library, ie the GEWTG family of models (GEWTGCU1, GEWTECU1, GEWTPTU1, GEWTARU1, GEWT2MU1, GEWTGDU1). You can try using the GUST model. I am not sure if in the psse explore version the models are present

( 2019-08-29 17:57:58 -0500 )edit

Yes I agree with txc's answer. I have a little concern that there is a limitation on the gust model. That is to say during dynamic simulation, you can only change the wind speed using a simple gust function (like a gust of wind) other than other shapes (like read from sequence data ) you want to.

( 2019-08-29 20:13:12 -0500 )edit

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Asked: 2019-08-22 04:06:14 -0500

Seen: 966 times

Last updated: Aug 29