2011 International Conference on Alternative Energy in Developing Countries and Emerging Economies
- 255 -
V. E
XPERIMENTAL
O
BSERVATIONS
TABLE II
S
UMMARY OF
O
BSERVATIONS
F
ROM
E
XPERIMENT
Va
Max
(Volt)
Vf
(Volt)
Load
(W)
Charge
Energy
Discha-
rge
Energy
Efficien
cy
(%)
Chrg
Time
(Sec)
Dcrge
Time
(Sec)
80
100
100
18.5
10.4
56.2
235
223
80
100
200
18.4
10.3
55.9
264
194
100
100
200
30.6
17.4
56.9
340
225
100
80
100
33.3
18.1
54.3
341
300
80
100
300
18.8
10.2
54.2
235
172
100
100
300
32.4
17.1
52.8
353
201
100
80
300
33.4
16.9
50.5
325
233
100
70
300
35.4
19.5
55.0
295
250
100
70
100
35.7
18.2
50.9
356
309
100
60
300
3
1
.
2
17.3
55.4
353
231
V
I
. O
PTIMUM
C
ONTROL
S
YSTEM
D
ESIGN
P
ARAMETERS
From the above experimental observations, the optimum
parameters for designing a control strategy are selected. For
minimum charging energy, maximum armature voltage is 80
volts and maximum field voltage is 100 volts. For maximum
discharge energy, field voltage is 100 volts with a 100watts of
load.
I
V
. R
ESULTS AND
C
ONCLUSION
In this research, we have tried to prove that an addition of a
flywheel energy storage system to the existing power system
of Ramea will be very effective.
‘HOMER’ simulation output
shows that with the addition of flywheel energy storage
system (FESS) will reduce the fuel consumption of the diesel
generator and hydrogen generator, excess electricity is less,
emissions will be reduced; number of switching of the
hydrogen generator decreased by about 50% and the life of
generator will increase. It is also observed that use of a single
flywheel energy storage system can increase the maximum
renewable penetration. The hours of operation of the diesel
generators per year also decreases significantly. From the
experimental observations it was found that our dc machine
has efficiency around 55%. The objective of the experimental
observations is necessary for designing the control system of
the flywheel energy storage system flowing to and from the
grid. Figure 7 shows different charging and discharging
speeds of the dc machine. It also shows the discharging power
curves. Table II indicates the test summary from which the
efficiency of the machine was found. Visual basic language
was used for coding the designed control system. . Parameters
for minimum charging and maximum discharging energy were
(a)
(c)
Fig.7. (a) Charging in Different speed, (b) Discharging speed
curves, (c) Discharging power curve.
(b)
