Digital Signal Processing Reference
In-Depth Information
Fig. 13.16 Generator
terminal voltage for a case
of switching on the load Lo3:
a original AVR, b optimized
AVR
(a)
0.998
0.996
0.994
0.992
0.99
0.988
0.986
0.984
0.982
1
2
3
4
5
6
7
8
9
10
Time [s]
(b)
1.005
1
0.995
0.99
1
2
3
4
5
6
7
8
9
10
Time [s]
• Faults at various places in the system (at the generator terminals, behind
transformer T1, at the 6 kV side of load transformers, etc.),
• Loss-of-mains (islanding operation).
Within the loop of GA the simulation runs were being repeated for all AVR
units from the population of individuals to be optimized. After the perfor-
mance of all AVRs was assessed and the new population of individuals was
created, the EMTP-ATP simulations were run again with the new settings of
the AVRs.
Selected example of the optimized AVR performance is shown in Fig.
13.16
for
the case of load switching (Lo3 on). Terminal voltage of the generator G with the
optimized AVR can be compared with the signals obtained with the non-optimized
controller. One can notice the superior behavior of the AVR after optimization for
the presented case. The optimized AVR helps keeping maximal voltage deviation
smaller and enables faster voltage recovery after sudden change of generator
Search WWH ::
Custom Search