Electric Power Transmission and Distribution

Appendix 2

ANSWERS TO PROBLEMS

 

CHAPTER 2

1. 1.24 mH/km
2. 1.32 mH/km
3. 1.19 mH/km, 0.3755 Ω/km
4. 1.159 mH/km

5. L_a = 1.3012 – j0.055 mH/km, L_b = 1.2693 + j0 mH/km,

   L_c = 1.3012 + j0.0552 mH/km

6. 0.5586 mH/km
7. 4.527 μF
8. 10.4021 pp/km
9. 2.9775 μF
10. 0.0184 μF/km
11. 0.0173 μF/km
12. 8.7917 pF/km

CHAPTER 3

1. 1. 31.92 kV,
   2. 74.09 A,
   3. 97.7%
2. 1. 2.1%,
   2. 0.895 lagging,
   3. 98.6%
3. 1. 23.85 kV,
   2. 7.56%,
   3. 95%
4. 4.99%, 94.7%
5. 34.485 kV, 1760.03
6. 1. A = D = (0.99475 + j0.00225), B = (15 + j35) Ω, C = (–0.0000003 + j0.000299) S
   2. 122.796 kV,
   3. 12.22%,
   4. 93.93%

CHAPTER 4

1. At full load: (i) 275.65 kV, (ii) 498.72 A, (iii) 30%

   At no load: (i) 212 kV, (ii)438.78 A,(iii)–3.4%

2. 186.849 kV, 177.82 A, 0.04013 lead
3. 269.636 kV, 29.44%
4. A = D = (0.9754 + j0.0014605), B = (3.688542 + j62.31818) Ω,C = (–0.3836 × ...