haveityourwa's profile - activity

Hey I am not sure if this is the cause of the crash, and I know that this is 2 years after you posted the question but I found that in order to Call certain commands within FORTRAN I needed to enter the PFMODE and then run it and then re enter the DSMODE, otherwise the simulation would crash before the next timestep. Like so

CALL PFMODE(IERR)
CALL BRANCH_CHNG(222, 333, '1', INTGAR, REALAR, IERR)
CALL DSMODE(FALSE, IERR)

This may be worth looking into for others who are having a similar issue. I think it is likely that anything that uses Chapter 2 Power Flow Data commands within the FORTRAN code would likely need to be called this way. I believe that the reason why it works when you run the simulation to the time at which the trip will occur is that, when it pauses the simulation it enters the PFMODE and when you start running to the next simulation time by using the RUN command it re enteres DSMODE, I need to confirm this in the documentation though.

Cheers, found your drive link with the uexc_tutorial.

Hey, I understand this is not specifcally a Python PSSE question. But can someone point me in the direction of how to write a basic user written model for PSSE. I have been wanting to do this for a while but have not found any good information on how to do so. Cheers

Hey, Not sure if the issue I am seeing is due to resonance or something else however when running a frequency sweep on a model (change the impedance in each solution in order to study a different frequency) when approaching a resonance it appears that PSSE takes a busses voltage to 0pu at some point. I have actually tried this with a few different powerflow programs, pandapower and even powerworld and they all seem to have the same issue (not sure if it is an issue or simply core to how the Power Flow solution works).

The system is simply a 2 bus system with a slack at 1pu voltage. A single line of R,X pu of 0.0833,0.311000 at 50Hz (0.0833,3.732@600Hz). And a single fixed shunt 1.5Mvar at 50Hz(18 @600Hz) Like So.

Any information on this would be appreciated, can't upload files yet otherwise I would put up the raw files.

Cheers,

Anthony

Hey I was running outside of PSSE, turns out my PYWIN32 library was having some issues. Thanks for this though didn't know that you could set the out version inside dyntools. Unsure what I should mark as the answer.

Hey Guys, Have been trying to work on my process for extracting files into excel from PSSE. However after some time unsure if my installation is corrupt or what however I am now getting this error.

Traceback (most recent call last):
  File "C:/Dropbox/Power System Services/Scripts/New folder/PYTHON/2.7/PSSE Python Scripts/PSSE/General/DynDataExtractorBenchmarkingTeebar.py", line 129, in <module>
    achnf.xlsout(channels=signals, show=False, xlsfile=(PathDir + "\\sheets\\" + "Case_" + str(i+1) + '_2.xlsx'), outfile='', sheet ='', overwritesheet=True);
  File ".\dyntools.py", line 1084, in xlsout
  File ".\dyntools.py", line 428, in _xls_export
  File ".\excelpy.py", line 168, in <module>
  File "C:\Python27\lib\site-packages\win32com\client\__init__.py", line 11, in <module>
    import gencache
  File "C:\Python27\lib\site-packages\win32com\client\gencache.py", line 662, in <module>
    __init__()
  File "C:\Python27\lib\site-packages\win32com\client\gencache.py", line 56, in __init__
    _LoadDicts()
  File "C:\Python27\lib\site-packages\win32com\client\gencache.py", line 111, in _LoadDicts
    clsidToTypelib = p.load()
ValueError: insecure string pickle

Process finished with exit code 1

While working on one script it has now broken all of my scripts where this function(below) is used.

 achnf = dyntools.CHNF(outfile);
 achnf.xlsout(channels=signals, show=False, xlsfile=excel_file, outfile='', sheet ='', overwritesheet=True);

Have tried re installing PSSE V34 Excel python

Any help would be appreciated

Thanks!!!!

I don't know what IC is, what do you mean by IC set to 0/1 ? Thanks for the response

Hey, Have a few sequence files that share part of the data of one Raw file, is there anyway to add them easily together without creating a single .seq file beforehand. Cheers

Thanks, I thought this was the case, but have been unable to get this to work in practice. I guess I will continue trying. Thanks for the clarification on the delays.

Hey, I am running a series of test on a SMIB and have noticed that some simulations with a fault at the POC that bring the voltage to around 0.05 pu cause the simulation to crash. I was curious if there was a way to ensure this does not happen, or if I simply am doing something wrong. Cheers

Hey Guys, I was wondering if someone had an example of how the OLTC1T works. This is what I have entered into a dyr file.

108,'OLTC1T', 107 ,  1,20,0,2.5/

From what I understand from the documentation this will control the transformer from bus 108 to 107. This will have a CID of 1 and from page 814 in the models.pdf it will have a time delay of 20, a time constant of 0 and a subsequent time before tap signals is sent of 2.5.

However I am not sure what voltage it is controlling to?

Also I am unsure as to what these delays actually mean.

Ultimately I would like to use this model in order to change the tap every timestep (I know this may sound silly) after a certain period of time.

Any Help would be appreciated. Cheers

Hey, I've noticed that depending on the version of codemeter I use it can take between 0.2s and 27s to initialise V34.2 PSSE. Has anyone else encountered this sort of an issue when updating CodeMeter. Cheers, (If I should post this as an edit to my previous question let me know)

Hey guys,

Propbably a total lack of looking.

But if someone could point me into the direction of the way shunts a modelled inside PSSE so that I can create an equivalent in my case specifically inside PSCAD.

Cheers

Hey Juan, I just posted an answer to your question. If you have some example code if you could add it to that question I would be happy to have a look at it.

Hey The delay seems to add the stability and stop the errors from occuring thanks for helping with this, also the code from Ebahr and yourself has helped increase my understanding of the multiprocessing library.