EMag's profile - activity

Does this apply for V35-V34XPLORE?

Any luck finding how to convert PSSE *.out files to COMTRADE? I am interested and have been looking for a solution also

Hi PSSE community,

Does anyone know where I can find example parameters for DERA1 model in PSSE and range? Or reports of tests using this model? (e.g. NERC) All I found was it was on the list of acceptable models from NERC 2019, but that was it so far.

Thank you.

Hello PSSE community,

I currently have a small network (IEEE 9-Bus) with about 20% of renewable generation in the form of WT4G2 (with WT4E2 and REPCTA1). I am struggling because the response of my system to a load increase (0.5 pu) is not as I expect:

1) VAL+3 (frequency reference) of my wind machines is set at zero. I manually edit this to 1pu after initializing, however, I get no difference in the frequency response of my system, stays at the frequency Nadir. Where does the model get this reference from?

2) The frequency drop in my mix scenario (renewables and SG) is very slow compared to my scenario with only SG (I cannot my screenshot to show, but with only SG in 2.1 sec I reach nadir, but with wind at 8.2 sec I reach nadir) and the Nadir does not change to a lower value (expected for a lower inertia). i am using standard GE and Siemens models provided in the manuals.

My procedure has been: run steady state unit 1sec and then have a load increase of 0.5 up, running to 15sec or 30sec after.

How do you set this frequency reference from the beginning of the simulation? I am looking at seeing the response of my system due to a load change, but I cannot get the frequency recovery because my Wind machines are not providing any support, because their L+3 VAR is set by default at zero

I am having issues with all my files (*dyr, *snp, *sav) which were created in V35 and now I need to open in V34 EXPLORE and it doesn't work

I have this issue also with PSSE V35 and want to save as PSSE V34, but have no options available

Hello,

Anyone using PSSE Version 35 come across an issue where PSSE is not reporting the model data in data checking mode?

In V34 I would get a "DOCU" tab at the bottom of the window listing the VARS and CONs of my numbers and their number. Now with V35 all I get is a message in the progress window saying "Output completed".

Thank you!

Following the reply below from Jconto (who gets credit for this!), for those using PSSEXplore34 you need to look for "pssexplore34.py" (not psse34.py) and it must be in the same folder as "pssexcel.pyc" and "psspy.pyc" (can be in folder "PSSPY27" or "PSSPY34"). I amended the code from Jconto to reflect that and also some print phrases so you can check the code is running.

import os, sys
DIRECTORY_PATH =r'C:\Program Files (x86)\PTI\PSSEXplore34\PSSPY27'    #=psspy folder
sys.path.append(DIRECTORY_PATH)
import pssexplore34
print("Pssexplore initiated")
import excelpy
print("Excelpy imported sucessfully")

Thanks for the reply! That solved it, all I needed to change my file, as I am using PSSEXplore34 the file is named "pssexplore34.py" and I confirm its in the folder with "pssexcel.pyc" and "psspy.pyc", which I named my DIRECTORY_PATH above

Thanks for replying! I will try those suggestions and then provide some feedback.

Hi,

I want to perform some analysis on my PSSE *.out file and not sure what the best approach is, as I am struggling to setup python to use "pssexcel" or dyntools. Not sure if this issue is related to my setup or the fact I have PSSExplore 34. So any pointers or suggestions would be really helpful!

Thanks!

First, So far I have this code below, but keep getting errors when trying to run in python

import os
import sys
DIRECTORY_PATH =r'C:\Program Files (x86)\PTI\PSSEXplore34\PSSPY27'
PSSE_PATH = r'C:\Program Files (x86)\PTI\PSSEXplore34\PSSBIN'

sys.path.append(DIRECTORY_PATH)
os.environ['PATH'] =+ ";" + PSSE_PATH 

import excelpy

I also followed a suggestion from other posts of running existing examples from PSSE installation. I tried running "dyntools_demo.py" and got the error:

Traceback (most recent call last):
  File "C:\Python27\Lib\site-packages\pythonwin\pywin\framework\scriptutils.py", line 326, in RunScript
    exec codeObject in __main__.__dict__
  File "C:\Program Files (x86)\PTI\PSSEXplore34\EXAMPLE\dyntools_demo.py", line 405, in <module>
    import psse34
ImportError: No module named psse34

Second, How do I import *.out file and "detect" all its entries? Or I need to know beforehand?

(added an update to the question, as it was not directly asked)

I had some similar issues, but using the 2nd generation generic models (WT4G2 and WT4E2). I believe there was some issue in the parameters of the control I put, but was unable to measure Iqcmd or Ipcmd for further debugging. As I was out of time, I replaced WT4E2 with REECA1 (see the Models.pdf).

If you are referring to the Generic models (see Link: https://www.esig.energy/wiki-main-page/type-4-generic-wind-turbine-generator-model-phase-ii/) these are modeled in PSSE (WT4G2, WT4E2, ... search in the "MODEL.pdf" manual)

I have managed to solve by checking the "Progress" tab, however I consistently get this issue even with new scenarios on the Synchronous Generator models, the DSTATE arent close to zero. I hope this additional info may help an answer or in case anyone has come across a similar issue.

I agree, the details in "Initial conditions suspect" I have found helped me solve an issue before.

The best answer to this question I later found was that ESIG websites contain typical values and ranges for most of these models, which are followed by PSSE (maybe not exactly, but close)

Actually, I got further updates on this, the parameters I couldn't find in the diagram were related to FRT, but I was told that these are just settings and not control blocks, thus seen as internal variables for the model, which is why they don't show in the block diagram

Hi everyone,

I am running a 4-bus 3-Generator system in PSSE. I had added the models WT4G2 + REECA1 (WT4E2 was giving issues). I tried running before the wind model (WT4G2+REECA1) in a small network and the dynamics were fine. When I try to run the model with the same parameters in my bigger network, despite successfully getting a PF with 0 mismatch, once I "initialize" for the dynamic simulation I get a warning message about "initial condition suspects" + "network not converged at TIME". The abovementioned system runs fine with only synchronous generators.

So far I tried the following: - I read online it could be from the Power flow method selected, but as I mentioned above, I made sure there were no mismatches. - I have also re-created my network, in case files were corrupted

Can anyone help me? Why I am I getting this issues? Has anyone experienced difficulties with these renewable generators?

Thanks for your help.