Anonymous

I am new to PSSE and I am using version 33. I have the licences for both NEVA and LYSANS. I have loaded both .sav as well as .dyr files even then it is showing no results. While loading .dyr file It was asked to create conec and conet and I did it. But I am confusing what was the error. I do not have NEVA manual and feeling very difficult to follow the PTI manuals.

Its greatly helpful if anybody explain the procedure to do eigenvalue analysis.

Thanks.

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answered 2015-02-17 13:03:21 -0500

Javier
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Hello:

The procedure to perform small-signal analysis with NEVA-PSS/E is the following:

Load ".sav" case.
Run a power flow.
load the dynamic file ".dyr"
Press "Dynamics"->"Launch NEVA Eigenvalue analysis"

Please, note that you do don't have to convert the loads and generators as have to be done in time-domain simulations.

Once this is done, a folder with NEVA files will be created (NETOMAC files). NEVA will start automatically and yo will be able to obtain the eigenvalues of the linearized system. If NEVA does not start, you have to run it yourself and load the ".NID" case, which is in the new folder.

I don't have it in front of me now, but once you have loaded the file in NEVA, is easy, it should appear smth like "modal analysis" or "eigenvalues". If you press that button, the list of the eigenvalues is obtained.

I do not have LYSANS license, but it should be similar ("Dynamics"->"Build matrices for LYSANS program")

javier

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Hi! How can i get NEVA? I have to do a small signal stability analysis in PSS E and i do not have NEVA, i need to download it. I need you help

Emely ( 2020-06-11 10:41:12 -0500 )edit

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answered 2015-02-17 16:01:29 -0500

JGunda
11 ●5 ●5 ●7

updated 2015-02-19 15:20:53 -0500

Hi Javier! Could you or anybody in the forum please tell how can we start NEVA manually and what is .nid case, whether it is program generated or user written file. I have tried with various test systems and even I tried with simple 2-bus also, but the NEVA module is not starting yet all and ending with an error mentioned below. I have done the eigenvalue analysis with simulink but not able to do the same in PSSE. I am very new to python so I am unable to change the or at least see the source code of NEVA python module. Could you please help me sort out this problem.

Traceback (most recent call last): File ".\pssneva.py", line 882, in <module> File ".\pssneva.py", line 99, in getnetomac_path TypeError: exceptions must be old-style classes or derived from BaseException, not str

Any information greatly helps me.

Thanks

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Hello, Sorry the delay. I didn't visit the forum. I'm afraid I do not know how to solve your problem, but I can tell you some tips about my experience with NEVA

Javier ( 2015-03-16 10:41:51 -0500 )edit

(1) the ".nid" file is your original PSS/E file converted to NETOMAC-type file. In other words, is the new case, created to be compatible with NEVA. (2) I do not know what is the meaning of the error that you are talking about, it didn't appear to me. Nevertheless, I had some similar problems when

Javier ( 2015-03-16 10:50:34 -0500 )edit

installing PSS/E and it was that the paths where not correct. I think that the problem is in the installation or in the compatibility with PSS/E 33.

Javier ( 2015-03-16 10:53:56 -0500 )edit

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Could anybody please explain the procedure for NEVA eigenvalue analysis?

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