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PV and WTG Step Change

asked 2018-12-20 00:33:04 -0500

ffl gravatar image

How to implement step change on PV and WTG 2nd generation dynamic models? Is it only by changing the values of vref and Pref?

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Why don't you try that and find out if it works?

jfconroy gravatar imagejfconroy ( 2018-12-21 02:10:32 -0500 )edit

it's not working.

ffl gravatar imageffl ( 2018-12-22 11:11:10 -0500 )edit

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answered 2019-01-29 22:03:34 -0500

I have created a tool named "DMView" to run voltage response test including voltage step change test.

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You can download and try it: (

yunzhi cheng gravatar imageyunzhi cheng ( 2019-01-29 22:03:49 -0500 )edit

Could you please share your tool again, link has expired?

marilyn3 gravatar imagemarilyn3 ( 2019-06-12 16:20:14 -0500 )edit

yunzhi cheng gravatar imageyunzhi cheng ( 2019-11-19 14:50:52 -0500 )edit

thanks a lot!!

marilyn3 gravatar imagemarilyn3 ( 2019-12-10 15:25:52 -0500 )edit

answered 2018-12-22 18:11:41 -0500

txc gravatar image

updated 2018-12-22 18:12:01 -0500

Take a look at the VARs available in the reeca, reecb, reecc models. Changing those VARs can be used to stimulate a step change for getting response for the renewable models. If the VARs are not available, you can always write a machine model that changes the wpcmd, wqcmd to get your desired simulation response.

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I changed the VAR(L) of REPCAU1 model and it's doing a Voltage step. Thanks.

ffl gravatar imageffl ( 2018-12-24 20:33:40 -0500 )edit

Now for changing p and q set points, you can write a model to change the wpcmd, wqcmd which will give you the desired response

txc gravatar imagetxc ( 2018-12-25 22:16:22 -0500 )edit

answered 2018-12-22 09:51:51 -0500

jconto gravatar image

An equivalent approach is to change network voltage and/or frequency at the POI (point of interconnection). Use the playback model PLBVFU1 to run such simulations. Check the posting "PLBVFU1 Playback model" for more info, and the PTI manual, Models -> Generator.

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I'm changing the value of CON(J+8) in the REECBU1 to obtain a step response in the terminal voltage of the PV (by 2-3%) while enabling the refflag and fflag in the REPCAU1. No changes in the voltage response.

ffl gravatar imageffl ( 2018-12-22 11:14:11 -0500 )edit

jconto, I used playback model simulation and it worked. Thanks for suggesting.

ffl gravatar imageffl ( 2019-01-09 07:57:45 -0500 )edit

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Asked: 2018-12-20 00:33:04 -0500

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Last updated: Jan 29 '19