i get this error "attempting to load ybus script as a function"
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i have added the ybus.m in the command window byt when i try to run the fuction it gives an error message "attempting to load script as a function"
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Geoff Hayes
2022-9-29
@Adegoke Williams - are you referring to the code from the File Exchange found here? Please clarify what you mean by "added the ybus.m in the command window" and show how you are "running the function". Also, please copy and paste the full error message to this post.
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David Hill
2022-9-29
Not sure what you are doing, but works fine for me.
z = [0, 1, 0, 1.0; 0, 2, 0, 0.8; 1, 2, 0, 0.4; 1, 3, 0, 0.2; 2, 3, 0, 0.2; 3, 4, 0, 0.08];
y=Ybus(z)
function[Ybus] = Ybus(zdata)
nl=zdata(:,1); nr=zdata(:,2); R=zdata(:,3); X=zdata(:,4);
nbr=length(zdata(:,1)); nbus = max(max(nl), max(nr));
Z = R + j*X; %branch impedance
y= ones(nbr,1)./Z; %branch admittance
Ybus=zeros(nbus,nbus); % initialize Ybus to zero
for k = 1:nbr; % formation of the off diagonal elements
if nl(k) > 0 & nr(k) > 0
Ybus(nl(k),nr(k)) = Ybus(nl(k),nr(k)) - y(k);
Ybus(nr(k),nl(k)) = Ybus(nl(k),nr(k));
end
end
for n = 1:nbus % formation of the diagonal elements
for k = 1:nbr
if nl(k) == n | nr(k) == n
Ybus(n,n) = Ybus(n,n) + y(k);
else, end
end
end
end
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A.B.M. NOUSHAD BHUIYAN
2024-4-17,18:02
Can you help me to find Y bus admittance matrix for the following "z=[
0 1 0 0.0608 %GEN 1: From ground to bus 1
0 2 0 0.1198 %GEN 2: From ground to bus 2
0 3 0 0.1813 %GEN 3: From ground to bus 3
0 5 0.6841 0.2737 % Transmission line from ground to bus 5
0 6 1.0262 0.3421 % Transmission line from ground to bus 6
0 8 0.9196 0.3219 % Transmission line from ground to bus 8
1 4 0 0.0576 % Transformer from bus 1 to bus 4
2 7 0 0.0625 % Transformer from bus 2 to bus 7
3 9 0 0.0586 % Transformer from bus 3 to bus 9
4 5 0.101 0.085 % Transmission line from bus 4 to bus 5
4 6 0.017 0.092 % Transmission line from bus 4 to bus 6
5 7 0.032 0.161 % Transmission line from bus 5 to bus 7
6 9 0.039 0.170 % Transmission line from bus 6 to bus 9
7 8 0.0085 0.072 % Transmission line from bus 7 to bus 8
8 9 0.0119 0.1008 % Transmission line from bus 8 to bus 9
0 4 0 -1/(0.088+0.079) % Shunt capacitance at bus 4
0 5 0 -1/(0.088+0.153) % Shunt capacitance at bus 5
0 6 0 -1/(0.079+0.179) % Shunt capacitance at bus 6
0 7 0 -1/(0.153+0.0745) % Shunt capacitance at bus 7
0 8 0 -1/(0.0745+0.1045)% Shunt capacitance at bus 8
0 9 0 -1/(0.1045+0.179) % Shunt capacitance at bus 9
]
y=Ybus(zdata)
"
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