This program can be used for admittance bus formation for load flow analysis.
please mail me universal Y bus formation data or function
it solved my problem, thanks
pleasae i need ybus matlab code explanation
pleasae i need ybus matlab code for large power system with parallel lines connected between buses
your algorithm needs to consider at diagonal elements also the shunt elements susceptances to be complete. Form the bus data!
am i right?
i need explonation for each step
thanx it helped me a lot
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...
Y(fb(k),tb(k)) = Y(fb(k),tb(k))-y(k)/a(k);
Y(tb(k),fb(k)) = Y(fb(k),tb(k));
% 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);
Y % Bus Admittance Matrix..
please send to me asolved example about ybas formation
iam interested in matlap program
Updated for double lines
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