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Admittance Bus (Y-Bus) Formation

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Admittance Bus (Y-Bus) Formation

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09 Apr 2008 (Updated )

This program can be used for admittance bus formation for load flow analysis.

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Description

This program can be used for admittance bus formation for load flow analysis.

MATLAB release MATLAB 7.6 (R2008a)
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Comments and Ratings (7)
16 Jan 2014 drakshayani ks

no comment

16 Feb 2013 Valeriu

hello,
your algorithm needs to consider at diagonal elements also the shunt elements susceptances to be complete. Form the bus data!
am i right?

12 Dec 2012 umakanth ramineedi

i need explonation for each step

19 Sep 2009 bibha boro

thanx it helped me a lot

02 Apr 2009 Duane Hanselman

Of use to the author only. Here is what the file ybusppg.m contains:
num = 14;
fb = linedata(:,1); % From bus number...
tb = linedata(:,2); % To bus number...
r = linedata(:,3); % Resistance, R...
x = linedata(:,4); % Reactance, X...
b = linedata(:,5); % Ground Admittance, B/2...
a = linedata(:,6); % Tap setting value..
z = r + i*x; % Z matrix...
y = 1./z; % To get inverse of each element...
b = i*b; % Make B imaginary...

nbus = max(max(fb),max(tb)); % no. of buses...
nbranch = length(fb); % no. of branches...
Y = zeros(nbus,nbus); % Initialise YBus...
% Formation of the Off Diagonal Elements...
for k=1:nbranch
Y(fb(k),tb(k)) = Y(fb(k),tb(k))-y(k)/a(k);
Y(tb(k),fb(k)) = Y(fb(k),tb(k));
end
% Formation of Diagonal Elements....
for m =1:nbus
for n =1:nbranch
if fb(n) == m
Y(m,m) = Y(m,m) + y(n)/(a(n)^2) + b(n);
elseif tb(n) == m
Y(m,m) = Y(m,m) + y(n) + b(n);
end
end
end
Y % Bus Admittance Matrix..

26 Jul 2008 jehan hussian

please send to me asolved example about ybas formation

27 Apr 2008 norhan2000 king

iam interested in matlap program

Updates
21 Nov 2008

Updated for double lines

02 Apr 2009

Added linedatas..

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