Environmental Engineering Reference
In-Depth Information
C 1
C
R
27.5 kV
Figure 9.5 Load model of a high-speed train
Table 9.1 Parameters of the traction system
Parameters
Values
Grid-side line voltage
220 kV
K V
220:27
.
5
K D
27 . 5:1
L a and L b
1 . 5mH
DC-bus capacitor
30000 μ F
Initial voltage of the DC-bus capacitor
4600 V
100
15
i A
i B
i C
10
50
5
0
0
−5
−50
−10
−100
−15
0
0.04
0.08
0.12
0.16
0.2
0
0.04
0.08
0.12
0.16
0.2
Time/s
Time/s
(a) Load current
(b) Grid-side currents
5.8
4000
i sa
i sb
i sc
5.4
2000
5
0
4.6
−2000
4.2
−4000
0
0.04
0.08
0.12
0.16
0.2
0
0.04
0.08
0.12
0.16
0.2
Time/s
Time/s
(c) DC-bus voltage
(d) Compensation currents
100
10
8
75
6
50
4
25
2
0
0
0
0.04
0.08
0.12
0.16
0.2
0.12
0.14
0.16
0.18
0.2
Time/s
Time/s
(f) THD of Phase-A grid-side current (0.12~0.2 s)
(e) THD of Phase-A grid-side current
Figure 9.6 Effect of the compensation strategy when cos
θ =
1
 
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