VGB POWERTECH 10 (2019)

VGB PowerTech 10 l 2019
Analysis of a grid integrated wind energy conversion system
a)
400
lnverter Voltage
b)
x10 4
4
Grid real Power
300
3
200
P
2
1
Voltage in V
100
0
-100
-200
0
0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5
Time in sec
Grid reative Power
x10 5
0
-1
-300
-400
0.1 0.12 0.14 0.16 0.18 0.2 0.22 0.24 0.26 0.28 0.3
Q
-2
-3
0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5
Time in sec
Time in sec
Fig. 12. Performance analysis of (a) inverter voltage and (b) grid real and reactive power
1.500
Rotor Speed
80
PMSG real Power
Speed in m/s
1.000
500
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Time in sec
Wind Speed
15
P
60
40
20
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Time in sec
PMSG reative Power
0.04
Speed in rpm/s
10
5
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Time in sec
Q
0.03
0.02
0.01
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Time in sec
Fig. 13. Performance analysis of various speeds of rotor and wind.
Fig. 14. Performance of active power and reactive power in the PMSG.
resolving time is 0.5 seconds at equivalent
voltage is 190V correspondingly. In F i g -
u r e 11 , the presentation study of the
three segment voltage and current of grid
at standard situation is depicted.
In F i g u r e 1 2 (a and b), the presentation
study of inverter voltage, grid actual and
immediate power are illustrated. In this figure,
it is observed that the grid region voltage
is reserved at the evaluated value and
the dynamic power. It is established that an
easy and constant output power leveling
through extra flexibility and the diminution
of the wind turbine blade stress is accomplished
through the anticipated control
procedure. The deviations in the power
are typically steady by means of the anticipated
control procedure. But the grid code
is followed for grid incorporation. Therefore,
the proposed policy is employed for to
diminish the variation.
Analysis of Case 2
Here, the voltages are investigated in the
diverse speed circumstances. The dynamic
power, immediate power, dc-link voltage
and harmonic reparation presentation are
investigated by means of the anticipated
regulator related cascaded H-bridge MLI
The anticipated representation is examined
by changeable wind speed as exposed
in F i g u r e 1 3 . The power and voltages
related by the wind generator alteration
based on input wind speed. Afterward the
Voltage in V
300
250
200
150
100
50
diminutive alteration in wind speed origins
an enormous disparity in output power,
consequently raising the voltage variation
for grid observance.
DC Link Voltage
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Time in sec
Fig. 15. Performance of dc-link voltage at various operations.
65