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Question

For the given Y-bus matrix, the reactance diagram is
Ybus=⎡⎢⎣−j10+j5+j5+j5−j20+j10+j5+j10−j10⎤⎥⎦

A
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C
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Solution

The correct option is C
Y11=j10 Y12=+j5 Y13=j5

y11+y12+y13=j10;
y12=j5 ; y13=j5

y11=j10(j5)(j5); y11=0
z12=1j5=j0.2 ; z13=1j5=j0.2;

Y22=j20 ; Y21=j5 ; Y23=j10

y21+y22+y23=j20 ; y21=j5 y23=j10

(j5)+y22+(j10)=j20 ; z21=1j5=+j0.2 ; z23=1j10

y22=j20+j10+j5

y22=j5

z22=1j5=j0.2

Y33=j10 ; Y31=+j5 ; Y32=+j10

y31+y32+y33=j10 ; y31=j5 ; y32=j10

j5+(j10)+y33=j10 ;

y33=j10+j10+j5

y33=+j5

z33=1j5=j0.2

z31=1j5=j0.2 ; z32=1j10=j0.1



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