Newton-Raphson Loadflow

These matlab m files are used to calculate bus voltages and angles using Newton Raphson iterative me

Description

These matlab m files are used to calculate bus voltages and angles, power flows using Newton Raphson iterative method

• MATLAB release: MATLAB 7 (R14)
• Other requirements: Matlab 6 or higher

[B. Roossien]

- C-type of programming instead of Matlab-style (vectorised) programming.

- Script files instead of functions

- Very little documentation is provided making this contribution only useful for the author.

Author please remove this submission as it has no value to anyone but you. Why submit a file that no one else can understand?

[saloman danaraj]

This program does not include the effect of tap changing transformers on powerflow which very much essential for modelling the problem.
The IEEE 30 bus system has 3 transformers .The author simply ignores that.

[Jayanti Bhattacharjee]

needs excellent speed

[sougata mandal]

we need the programme such a simple steps,which is better 2 understand for the new learners. thank u........

[Randhir Soni]

if u ve made this prog with including Tap changing transformer then it will be better for someone to have complete practical idea about load flow problem

[S F]

best

[prasert limsakun]

very good for program loadflow

[Husam Aldahiyat]

 

[Raju C V]

Simple steps,Good program for novice programmers. Thanks

[Erdal Bizkevelci]

 

[senthil]

thank you to provide this

[senthil]

please provide me the FAST DECOUPLED load flow method

[Omar]

i have one mistake in the display Line Flow and losses:
error in loadflow at 95(Function is not defined for sparse inputs.) and nrlfppg at 160 , i need help

[PRAVI]

@Omar: I guess, this is error is bcs of the different versions of matlab. Keep the line 60 (loadflow.m) commented.

%Sij = sparse(Sij);

And try again.

[gmrit]

PLEASE SEND NR METHOD LOADFLOW STUDY WITH UPFC. I LIKE THIS PROGRMME SOMUCH.IT IS FANTASTICK.PLEASE SEND UPFC PROGRAM TO [e-mail]

[Ali]

 

[rasoul bayani]

thanks .very much

[Mehdi Davoudi]

it works properly but why the results are far from the real ones even with too many iterations?

[balaji]

When i run for 69 bus i get the error ""??? Attempted to access V(66); index out of bounds because numel(V)=65."
can anyone help

[Fabián]

Why do you add .01 to voltage magnitude when a pv bus is out of mvar limits??

[reygen oraiz]

hi..i have the same mistake with omar and as you said, make this "Sij = sparse(Sij);" be commented at line 60..(its line 43) but an error occur again, it says:

??? Input argument "nb" is undefined.

Error in ==> loadflow at 5
Y = ybusppg(nb);

---------please help------------
i really need to have this right! thanks

[meysam shamshiri]

Thanks

[Ivan]

hi, i'm have some problem with this script, you could help me?
Error in ==> Untitled at 4
Y = ybusppg(nbus); % Calling
ybusppg.m to get Y-Bus Matrix..

[Ivan]

first time thank for your attention.

[Ivan]

I wonder if this script calculates the number of iterations performed, and if they do not calculate whether there is any way to calculate. Thanks in advance.

[jayendra javi]