Re: Power Flow in Matpower

Tue, 20 Mar 2018 16:22:52 -0700

Let's see,  Mohammed:  I tried the data in MATPOWER format that you posted originally, and applied the case_info(0) function to it, yielding the following results:

>> case_info(mpc)
Checking connectivity ... 3 connected groups, 1 isolated bus
Elapsed time is 0.149655 seconds.
================================================================================
                        Full       Island      Island      Island     Isolated 
                       System         1           2           3         Buses  
Number of:           ----------  ----------  ----------  ----------  ----------
  buses                   154         146           4           3           1  
  loads                    77          69           4           3           1  
    on                     77          69           4           3           1  
    off                     -           -           -           -           -  
    fixed                  77          69           4           3           1  
    dispatchable            -           -           -           -           -  
      on                    -           -           -           -           -  
      off                   -           -           -           -           -  
  generators               13          10           3           -           -  
    on                     13          10           3           -           -  
    off                     -           -           -           -           -  
  shunt elements           45          44           -           -           1  
  branches                172         167           3           2           -  
    on                    167         162           3           2           -  
    off                     5           5           -           -           -  
    ties (off)              -           -           -           -           -  

Load               
  active (MW)      
    dispatched           6416.2      5599.8       196.0       528.4        92.0
      fixed              6416.2      5599.8       196.0       528.4        92.0
      dispatchable          -           -           -           -           -  
    curtailed               -           -           -           -           -  
    nominal              6416.2      5599.8       196.0       528.4        92.0
      on                 6416.2      5599.8       196.0       528.4        92.0
      off                   -           -           -           -           -  
      fixed              6416.2      5599.8       196.0       528.4        92.0
      dispatchable          -           -           -           -           -  
        on                  -           -           -           -           -  
        off                 -           -           -           -           -  
  reactive (MVAr)  
    dispatched           2125.7      1855.6        64.4       173.7        31.9
      fixed              2125.7      1855.6        64.4       173.7        31.9
      dispatchable          -           -           -           -           -  
    curtailed               -           -           -           -           -  
    nominal              2125.7      1855.6        64.4       173.7        31.9
      on                 2125.7      1855.6        64.4       173.7        31.9
      off                   -           -           -           -           -  
      fixed              2125.7      1855.6        64.4       173.7        31.9
      dispatchable          -           -           -           -           -  
        on                  -           -           -           -           -  
        off                 -           -           -           -           -  

Generation         
  active (MW)      
    dispatched           6621.8      6234.6       387.3         -           -  
    max capacity            -           -           -           -           -  
      on                    -           -           -           -           -  
      off                   -           -           -           -           -  
    min capacity            -           -           -           -           -  
      on                    -           -           -           -           -  
      off                   -           -           -           -           -  
  reactive (MVAr)  
    dispatched           2762.6      2601.0       161.7         -           -  
    max capacity            -           -           -           -           -  
      on                    -           -           -           -           -  
      off                   -           -           -           -           -  
    min capacity            -           -           -           -           -  
      on                    -           -           -           -           -  
      off                   -           -           -           -           -  

Shunt Injections   
    active (MW)             -           -           -           -           -  
    reactive (MVAr)      1934.0      1894.0         -           -          40.0

Branch Losses      
    active (MW)             -           -           -           -           -  
    reactive (MVAr)         -           -           -           -           -  

DC line            
  export (MW)      
    dispatch                -           -           -           -           -  
    max capacity            -           -           -           -           -  
      on                    -           -           -           -           -  
      off                   -           -           -           -           -  
    min capacity            -           -           -           -           -  
      on                    -           -           -           -           -  
      off                   -           -           -           -           -  

Reference Buses    
  num of ref buses          1           1           0           0           0  
  ref bus numbers          27          27                                      

Is this what the data is supposed to represent?

Carlos.

Mohammed Alhajri wrote:
Ok, i have attached the case information in format of Hadi Saadat code, can you please try it in MATPOWER? 

because we have spent more than three weeks checking the format, but still dose not converge... 

Regards,,, 

بتاريخ ٢٠١٨/٠٣/٢٠ ٦:٢٦ م، كتب "Ray Zimmerman" <[email protected]>:
It’s possible that the modeling is not identical or that there is some error in your conversion to MATPOWER format. You can check by talking the solved case from your other software, converting that solved case to MATPOWER and then trying the MATPOWER power flow. It should converge in a single iteration. If it does not, then you know that there is either a mistake somewhere or a difference in modeling.

   Ray


On Mar 16, 2018, at 12:42 PM, Mohammed Alhajri <[email protected]> wrote:

i tried that but unfortunately not work 

بتاريخ ٢٠١٨/٠٣/١٦ ٨:٣٠ م، كتب "Abhyankar, Shrirang G." <[email protected]>:

See FAQ #5

 

 

 

From: <bounce-122387760-73493617@list.cornell.edu> on behalf of Mohammed Alhajri <[email protected]>
Reply-To: MATPOWER discussion forum <[email protected]>
Date: Friday, March 16, 2018 at 11:26 AM
To: MATPOWER discussion forum <[email protected]>
Subject: Re: Power Flow in Matpower

 

any answer to this question?

 

بتاريخ ٢٠١٨/٠٢/٢٥ ٧:١٨ م، كتب "Mohammed Alhajri" <[email protected]>:

Hello All,

 

I did the power flow for a 89-bus network and it converges using Hadi Sadat code after 17080 iterations. The accuracy was 1e-8 and the method is Gauss-Seidel Method.

 

But when I did the power flow using matpower it does not converge! I tried to increase the maximum iteration, I put it 100000, and still did not cnvarge!

 

I have attached the data according to Hadi Sadat Code, can any one try to do the power flow using matpower?

 



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