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Z Bus Algorithm for Engineers

The document describes using a Z bus algorithm to calculate the Z bus matrix from a given primary Z matrix. It provides the code to iterate through each element of the primary Z matrix and modify the Z bus matrix accordingly based on the bus numbers referenced and element value. The output displays the final calculated Z bus matrix.

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Mitesh Gandhi
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108 views5 pages

Z Bus Algorithm for Engineers

The document describes using a Z bus algorithm to calculate the Z bus matrix from a given primary Z matrix. It provides the code to iterate through each element of the primary Z matrix and modify the Z bus matrix accordingly based on the bus numbers referenced and element value. The output displays the final calculated Z bus matrix.

Uploaded by

Mitesh Gandhi
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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PRACTICAL

Aim:-To obtain Z bus using Z bus algorithm method.


Program:-
clc
clear all
zprimary=[1 1 0 0.25;
2 2 1 0.1;
3 3 1 0.1;
4 2 0 0.25;
5 3 2 0.1 ]
[elements columns]=size(zprimary)
zbus=[ ]
currentbusno=0
for count=1:elements
[rows cols]=size(zbus)
from = zprimary(count,2)
to=zprimary(count,3)
value=zprimary(count,4)
newbus=max(from,to)
ref=min(from,to)
if newbus > currentbusno & ref==0 %type1modification
zbus=[zbus zeros(rows,1)
zeros(1,cols) value]
currentbusno=newbus
continue
end
if newbus > currentbusno & ref~=0 %type2modification
zbus=[zbus zbus(:,ref)
zbus(ref,:) value+zbus(ref,ref)]
currentbusno=newbus
continue
end
if newbus <= currentbusno & ref==0 %type3modification
zbus=zbus-1/(zbus(newbus,newbus)+value)*zbus(:,newbus)*zbus(newbus,:)
continue
end
if newbus <= currentbusno & ref~=0 %type4modification
zbus=zbus-(1/(value+zbus(from,from)+zbus(to,to)- 2*zbus(from,to))*(zbus(:,from)- zbus(:,to))*(zbus(from,:) -
zbus(to,:)))
continue
end
end
Results:-
zprimary =

1.0000 1.0000 0 0.2500


2.0000 2.0000 1.0000 0.1000
3.0000 3.0000 1.0000 0.1000
4.0000 2.0000 0 0.2500
5.0000 3.0000 2.0000 0.1000
elements =
5
columns =
4
zbus =
[]
currentbusno =
0
rows =
0
cols =
0
from =
1
to =
0
value =
0.2500
newbus =
1
ref =
0
zbus =
0.2500
currentbusno =
1
rows =
1
cols =
1
from =
2
to =
1
value =
0.1000
newbus =
2
ref =
1
zbus =
0.2500 0.2500
0.2500 0.3500
currentbusno =
2
rows =
2
cols =
2
from =
3
to =
1
value =
0.1000
newbus =
3
ref =
1
zbus =
0.2500 0.2500 0.2500
0.2500 0.3500 0.2500
0.2500 0.2500 0.3500
currentbusno =
3
rows =
3
cols =
3
from =
2
to =
0
value =
0.2500
newbus =
2
ref =
0
zbus =
0.1458 0.1042 0.1458
0.1042 0.1458 0.1042
0.1458 0.1042 0.2458

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