Environmental Engineering Reference
In-Depth Information
30
30
u ref
u A
u ref
u A
15
15
0
0
−15
−15
−30
−30
4
4
e u
e u
2
2
0
0
−2
−2
−4
−4
0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
Time [s]
Time [s]
(a) f = 49 . 85
Hz
30
30
u ref
u A
u ref
u A
15
15
0
0
−15
−15
−30
−30
4
4
e u
e u
2
2
0
0
−2
−2
−4
−4
0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
Time [s]
Time [s]
(b) f = 49 . 90
Hz
30
30
u ref
u A
u ref
u A
15
15
0
0
−15
−15
−30
−30
4
4
e u
e u
2
2
0
0
−2
−2
−4
−4
0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
Time [s]
Time [s]
(c) f = 49 . 95
Hz
Figure 5.14 Responses when the grid frequency was below 50 Hz: with the frequency-adaptive mech-
anism (left column) and without the frequency-adaptive mechanism (right column)
 
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