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Power electronic control in electrical systems 195
î osc
Gating impossible when v C0 v
î ac
1.0 0
0.5
0.8
0.75
0.6
0.85
0.4
v/v
C0
0.2
1.0
0 1 2 3 4 5 6 7 8 9 10
n
Fig. 6.19 Amplitude of oscillatory current component. Thyristors gated when v v C0 .
0 0.25 0.50
î osc
î ac
2.6 0.75
2.4
1.25
2.2
2.0
1.8
1.6
0.85
1.4
1.2
1.0
1.10
0.8
1.0
0.6 1.10
1.25
0.4 v/v
C0
0.2
1.0
0
1 2 3 4 5 6 7 8 9 10
Transient-free switching n
Fig. 6.20 Amplitude of oscillatory current component. Thyristors gated when dv=dt 0.
