Environmental Engineering Reference
In-Depth Information
4
i ref
i a
2
0
−2
−4
2
e i
1
0
−1
−2
0
1
2
3
4
5
6
7
8
Time [s]
Figure 6.19 Transient response of the inverter when transferred from the stand-alone mode to the
grid-connected mode and then back
4
30
i ref
i a
u ref
u A
2
15
0
0
−2
−15
−4
−30
4
4
e i
e u
2
2
0
0
−2
−2
−4
−4
0.9
1
1.1
1.2
1.3
1.4
0.9
1
1.1
1.2
1.3
1.4
Time [s]
Time [s]
(a) i a , its reference i ref and the error e i
(b) u A , its reference u ref and the error e u
Figure 6.20 Detailed responses when transferred from the stand-alone mode to the grid-connected
mode at t =
1s
4
30
i ref
i a
u ref
u A
2
15
0
0
−2
−15
−4
−30
2
4
e i
e u
1
2
0
0
−1
−2
−2
−4
2.9
3
3.1
3.2
3.3
3.4
2.9
3
3.1
3.2
3.3
3.4
Time [s]
Time [s]
(a) i a , its reference i ref and the error e i
(b) u A , its reference u ref and the error e u
Figure 6.21 Detailed responses to a step change in the grid current reference I d from0Ato1 . 5Aat
t = 3s
 
Search WWH ::




Custom Search