nice
Am 16.06.15 um 17:21 schrieb Matthias Resch:
> Dear Matpower Community,
>
> I am using MATPOWER 5.1.
> The aim is to convert PSS Sincal grids to the MATPOWER format and run a load
> flow simulation.
>
>
> I will use an easy example to illustrate the problem. The Slack is on a 20 kV
> voltage level directly connected to a transfomer. Then there is a Sn=1 MVA,
> 20 kV/ 400 kV transformer. Followed by a line (5.83 m, NAYY 185 mm²) and a
> load with P=0.1 MW and Q=0 Mvar. The raw file is attached (mintest1.raw).
>
> If I use:
> mpc = psse2mpc('mintest1.raw')
>
> The following failure appears:
> Error using ./
> Matrix dimensions must agree.
>
> Error in psse_convert_xfmr (line 108)
> R(cz3) = trans2(cz3,25).^2 ./ trans2(cz3,21) ./ Zbs(fbus(cz3));
>
> This failure only happens if I use a grid with one transformer only, if there
> are several transformer in parallel everything runs fine.
>
> It seems that the variables cw2, cw3, cw23, cz2, cz3 and cz23 are 0x0
> matrices but they need to be 0x1 matrices. I don´t know if this is a bug or I
> just didn´t understand how this functions works. Nevertheless I changed the
> psse_convert_xfmr.m file by assigning the above mentioned variables (cw2,..)
> to a 0x1 matrix if the grid has only one transformer and now it works seems
> to work and the load flow shows (running PF with Newton-Raphson) the same
> results as in PSS Sincal.
>
> Here is the code I inserted in the two winding transformer section:
>
> if nt2 > 0
> B=size(trans2); \%%new code
> A=B(1, 1); \%%new code
> if A==1 \%%new code
> cw2 = zeros(0,1); \%%new code
> cw3 = zeros(0,1); \%%new code
> cw23 = zeros(0,1); \%%new code
> cz2 = zeros(0,1); \%%new code
> cz3 = zeros(0,1); \%%new code
> cz3 = zeros(0,1); \%%new code
> cz23 = zeros(0,1); \%%new code
> else \%%new code
> cw2 = find(trans2(:,5) == 2); \%% CW = 2
> cw3 = find(trans2(:,5) == 3); \%% CW = 3
> cw23 = [cw2;cw3]; \%% CW = 2 or 3
> cz2 = find(trans2(:,6) == 2); \%% CZ = 2
> cz3 = find(trans2(:,6) == 3); \%% CZ = 3
> cz3 = zeros(0,1);
> cz23 = [cz2;cz3]; \%% CZ = 2 or 3
> end
>
>
> It would be nice if anyone could tell me if he had the same problem or if it
> is only with my electrical grids/ raw files.
>
> Kind regards,
>
> Matthias Resch
>
> ---------------------------------------------
> M.Sc. Matthias Resch
> Researcher
>
> Optimized energy systems
>
> Reiner Lemoine Institut gGmbH
> Ostendstraße 25
> 12459 Berlin
> Tel.: +49 30 53042011
> Mobile: +49 160 4154188
> Fax.: +49 30 53042010
> Email: [email protected]<mailto:[email protected]>
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>
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> Amtsgericht Berlin-Charlottenburg, HRB 124659 B
>
>
>
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