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
Search WWH ::
Custom Search