Page 421 - Power Electronic Control in Electrical Systems

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400 Examples, problems and exercises

(ii) a
b
c

i L

TCR

i ph
i B
L/2 i A L/2
υ ph
Capacitors for PF
correction
and harmonic
filtering
Fig. 9.21
(iii)

Fig. 9.22
p
6 3
(iv) (a) First calculate X L : 100 10 ˆ 3 (400 10 /7) I L so I L ˆ 1010 A
and I ph ˆ 583:3A.
3
\ X L ˆ (400 10 /7)/583:3 ˆ 97:96
in each phase.
p  p  V ph s sin s
I 1L ˆ 3 I 1 ph ˆ 3
X L p
p
p  400 10 3 115 180 sin 115
ˆ 3 ˆ 354 A
7 97:96 p