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How do you run a dynamic simulation for CIM5BL model

asked 2017-07-13 23:54:58 -0500

John gravatar image

Would anyone be able to describe what my PSSE RAW and SEQ motor model should look like when I perform dynamics using a CIM5BL motor model? Should I be entering "machine" data or "load" data in the network data section? The instructions in the PSSE manual is not as straight forward.

Many thanks in advance

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answered 2017-07-14 18:02:53 -0500

jconto gravatar image

updated 2020-05-12 16:18:46 -0500

The CIM5 load model is discussed in the PSSe "Models.pdf" manual, pg. 9-9

I have prepared a python code to execute a dynamic simulation on the savnw.sav/savnw.dyr files located in the example folder of the PSSe v.33 installation. To assign the CIM5BL model to loads located at bus 154, add the following data to the end of the savnw.dyr file and save it:

@! cim5 load model
@!                  M,     RA,     XA,    Xm,     R1,     X1,     R2,    X2,  E1, S(E1),  E2,  S(E2), MBASE,PMULT,    H,  VI,  TI,  TB,   D, Tnom
154, 'CIM5BL', '*', 2,  0.053,  0.076,   2.4,  0.048,  0.062,  0.0, 0.0, 1.0,  0.06, 1.2,    0.6,   0.0,  1.2, 0.28, 0.0, 0.0, 0.0, 1.0,  0.0, / m1

Download the code [copy the link into your browser if it does not connect when clicking on it]:JConto_google drive. Once you select “”, an icon on the top-center screen will perform the download.

Make sure you can run it in your PC and then later, modify it to fit your run. Study the log file to check that there is no error produced by the PSSe activitites (python commands). If needed, set the integration step size to 0.001 (and matching freq. parameter to 0.004) to help with NAN output and not convergence issues.

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Thanks JConto for your reply. As for following your example, my question still pertains setting up the data for the load at bus 154. In the sample savnw.sav file that I have for PSSE v33, there is no load in the network data. My question is how do I setup that load in the savnw.sav file. Many thanks

John gravatar imageJohn ( 2017-07-17 10:06:21 -0500 )edit

Check the manual for the meaning of the parameters in the model. For the cim5 model, the first parameter is the bus number where the load is located. You can also set the load model for a whole area using the variant CIM5AR.

jconto gravatar imagejconto ( 2017-07-17 16:30:41 -0500 )edit

Thanks JConto, I was trying to understand the parameters for CIM5BL and am not to clear on Tnom. Is it necessary to derive a value for it or can I just use 0. Tnom seems to affect the duration in which the voltage recovers when the motor reaches full speed. Any advice helps. Many thanks.

John gravatar imageJohn ( 2017-08-30 09:53:00 -0500 )edit

Set Tnom >0,for motor starting simulation. In manual PAGV2 (Program Application Guide Vol2) Section [pg 21-17 to 21-20], check the "motor starting analysis" section that discuss the setting of Tnom.

jconto gravatar imagejconto ( 2017-08-30 10:48:32 -0500 )edit

Hi there, Can you help me here? I understand I have to add the above sample parameter set to the dyr file(for example a cim5bl model to 154 bus). How about in my .sav file? There is no load here. It seems like there is dynamic characteristics of load which is not there. What modification in .sav ?

Sanij gravatar imageSanij ( 2020-05-08 22:55:39 -0500 )edit

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Asked: 2017-07-13 23:54:58 -0500

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Last updated: May 12