Wednesday, October 5, 2011

Common Errors in ETAP

Recently, I had the good fortune to attend a training program on ETAP, conducted by Mr. P Nandakumar, a reputed freelance consultant and trainer of ETAP. The software is a superb tool for analyzing power systems of any complexity, but often it throws some counter-intuitive errors, which is difficult to analyze for the novice. This post is a collection of such common errors and the easiest solutions to them.

1. 1.  Error 2002 – The system has no energized branches

This is a common error while using ETAP for the first time, blocking out all calculations. Even though you might’ve added many elements to the layout, ETAP requires some elements, like a cable, line or transformer which has a non-zero impedance value. A circuit breaker helps to add more interconnected branches, but won’t solve the issue. If a transformer cannot be included in your diagram, you have to add a new bus and connect it using a short cable (say, 25 sq.mm, 50 m length) as shown below. This may be labeled dummy, if you like, and won’t affect the calculations in any way. This simple trick will save you from unnecessary hold up (about 1 hour, in my case!!)



39 comments:

  1. Thank You Sir

    It saved my Time

    Shailesh Kumar
    Systems Design
    Holtec Consulting Pvt Ltd, INDIA

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  2. I have got an error in ETAP as " Harmonic calculation is aborted due fundamental load flow divergence "But I can run my load flow analysis. So can u help me out with dis

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    Replies
    1. Shalini, I don't have the answer at present. I will try.

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    2. Even I am facing the same problem, please help me with this

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    3. divergence means the calculation not lead to one value. It may be caused by a loop in your system. try to separate your network and try again one by one

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    4. try to separate your network, and slowly merge it again by continously simulate the program

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  3. i have an error " load flow calculaions diverged"
    please guide me how to resolve this issue

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  4. We have the same problem in our graduation project ,so ,pls, if you solved this problem or found out why this error appear , could you ,pls,tell me .

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  5. on applying svc and configuring it ,after load flow it gives the error "load flow did not converge in the specified maximum no. opf iterations" plz help me

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    Replies
    1. check this
      http://www.linkedin.com/groups/Im-getting-messge-I-havent-3868394.S.226775134?qid=3c7e403d-78c3-49d1-800a-2ec3bdafc5fb&goback=.gna_3868394

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  6. I actually find out where was the problem :
    (1)Try to "out or service" all loads and then start reconnecting them one by one and try each time .
    (2)Try to increase no.of iterations from load flow study case.
    (3)Make sure that you don't have infinite bus and if you have more than one infinite bus then you should have more swing generators so try to make all you generators swing and then try after that try to change generators to voltage controlled type and see in the loaf flow report , does it work or not ?

    Good luck

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    Replies
    1. Excellent finding and thank you very much for the detailed comment.

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    2. Hi it works!!! disconec loads "out of service" it! and then again in service, works good , but at the end one of those loads i couldnot reconect id. regards

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  7. when running transient analysis message is coming " Voltage is exceeding than 2000% and problems with data files"

    Even all other modules working properly?
    Please help me

    Anurag

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  8. Error in Transient Stability Analysis using ETAP.

    When Running Transient Analysis (Motor Acceleration) using Stability module , message is coming " Voltage is exceeding than 2000% and problems with data files"
    even all other module is running , and motor is successfully started using motor starting module.
    Please help me.

    Regards
    Anurag

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    Replies
    1. Hi Anurag,
      Did you ever resolve this issue? I am currently experiencing the same issue with ETAP 12.0.0 and wondered if you had a solution to this problem.
      Rgds,
      David.

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  9. Help with possible solutions to the following error every time I try to run Transient stability Analysis in ETAP: TS calculation aborted due to max.initial load flow iteration reached at t =0.00 s The Load flow is unning is fine.

    Thank You.

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  10. My friend has a problem while running load flow. ETAP is automatically taking 80% of load though he has not entered any load factor. In case editor he has selected design load with 100% load factor. Is there any other global setting.

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  11. i have it too, and my error was that i didnt feeding the bus with the generator (voltage control), without this the load of my sistem was too much, and the simulation crashed (bus with 30% of voltage!! ), check that or down your load

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  12. Hello, Thanks a lot for sharing such a good source with all, i appreciate your efforts taken for the same. I found this worth sharing and must share this with all.
    Induction Motor

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  13. I have got an error in ETAP as " Harmonic calculation is aborted due fundamental load flow divergence "But I can run my load flow analysis.

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  14. i am Accessing a network to determine its current state in terms of performance. Etap 7.0 Load flow Analyzer was used to model both the existing 330kV network consisting of forty-eight (48) buses, fifty-one (51) transmission lines and twenty (20) generating stations and the expanded network consist of seventy-nine (79) buses, eighty-six (86) transmission lines and thirty-three (33) generating stations. i segmented the load into percentages, but on running the load flow it could not go beyond 65%. its giving an error message the it was unable to converge due to the maximum number if iteration. please i need your help.

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  15. Hi Dear Friends

    I'm making a simple single phase harmonic study consisting a power grid, bus, cable and a single phase static load; the 3-phase systems works well for both Load Fload and Harmonics, but when I make it single phase only the load flow works. For Harmonics study it gives three following errors. I made the dummy buses and added several cables, transformers, breakers, etc and they did not help at all.
    Error 2000: [Single phase Harmonics] Number of energized buses is less than two. Error 2001: [Single phase Harmonics] The system has no swing power grid or generators. Error 2002: [Single phase Harmonics] The system has no energized branches, such as cables, lines, and transformers, etc.


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    Replies
    1. U MUST CHANGE GENERATOR SWING FROM OPTION OF GENERATOR

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  16. Hi dear friends,
    While running transient stability I get this message: TS calculation aborted due to initial voltage lower than the limit as 0.000 sec. Could you please help solving this.
    many thank in advance

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  17. Hi dear friends
    While ruiining the transient stability analysis, I got this message: TS aborted due to initial voltage lower than the limit as 0.000 sec.
    Could you please help me solve this.
    many thanks in advance

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  18. i have an error calculation prosess terminated abnormally-exit code-9 in etap for harmonic analysis. So can u help me

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    Replies
    1. Hello, did you find the solution to the error? i have it too, but running transient stability.. If you know the answer please let me know! i would really appreciate it.

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    2. Hello, I get the same error when im trying to run transient stability...... =(

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    3. For error code 9 please open the project oti file directly instead of etap.i should work.

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    4. @vasudevan you're my savior, man..

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  19. Hello, I'm new to ETAP and our license is using 12.5.0 version. Can you email me (william.armstrong@aecom) where I can find complete guide on ETAP? I've looked through ETAP.com and scoured the internet with no good luck. Thank you so much!

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  20. I have an error "load flow calculation did not in the specified maximum number of iterations. Please help me

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  21. Increase number of iterations in load flow case study editor

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  22. Solution for error "load flow calculation did not in the specified maximum number of iterations"
    I have some problem with this when tried to simulate motor starting, the solution is try to check if there is any circuit loop or if there is any load that is connected to the transformer. and if you find it, insert a bus, then connect those loads to the transformer via that bus. It works for me.

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  23. It is a useful and charming post.It is extremely helpful for me.

    generator maintenance & bunded fuel tank hire

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  24. ETAP 12.5.0 indicates the following error "Calculation process terminated abnormally - Exit code 9

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    Replies
    1. I have the same problem but Exit code FF

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  25. Hey guys there is a problem with ma work
    This shows like this "calculation aborted due to superfluous branch connection " please help me

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