Modern Power System Analysis with MATLAB® Applications by Pearson

Power Flow Analysis

121

Table 4.3

Network data

Sl. No.

Bus Code

(k-m)

Per-unit Line Impedance

(

z

km

)

Per-unit Line Admittance

(

y

km

)

1 1 – 2

0.05 + j 0.15

2 – j 6

2 1 – 3

0.1 + j 0.3

1 – j 3

3 2 – 3

0.15 + j 0.45

0.6667 – j 2

4 2 – 4

0.1 + j 0.4

0.5882 – j 2.3529

5 3 – 4

0.05 + j 0.15

2 – j 6

Similarly, other elements in Y

bus

matrix can be calculated. Thus,

–2 + j 6 3.2549 – j 10.3529 –0.6667 + j 2 –0. 5882 + j 2.3529

–1 + j 3 –0.6667 + j 2 3.6667 – j 11 –2 + j 6

0 –0. 5882 + j 2.3529 –2 + j 6 2.5882 – j 8.3529

1

1

2

2

3

3

4

4

Y

bus

=

‘----------’ indicates that, these elements are not required in the calculations.

STEP 2

Calculation of elements of A vector and B matrix. (Refer Eqs. ...