46
The power coefficient (C p ) is a nonlinear function expressed by the fitting
equation in the form
C
c c
c
c
c
i
c
i
p
,
e
λ β
λ
β
λ
λ
( )=
−
−
+
−
1
2
3
4
1
6
1
5
(3.16)
with
1
1
0 08
0 035
1
3
λ λ
β β
i
= +
−
+
.
.
(3.17)
The value of constants c 1 –c 6 has been explained in later section.
Since wind energy is a semiconductor capable of producing energy, in this model
its high efficiency has been calculated to produce electricity power from the interconnected series-parallel configuration of diode model to convert wind energy into
electricity energy that can be supplied in the national grid (Fig. 3.1).
Consequently, using the ideal diode for an array with N s series-connected cells
and N p parallel-connected cells, the array current is calculated as voltage as follows:
I N I
I
q V IR
AKTN
=
−
+
(
) −
p
p h
r s
s
s
exp
1
(3.18)
where
Turbine
Drive train
Wind
Stator
Induction
Generator
Three-phase
Grid
Pitch angle
Cotrol
V r
V gc
Rotor
AC
DC
AC
L
C rotor
AC/DC/AC converter
C grid
Fig. 3.1 Modeling and simulation of wind energy that is converted into electricity energy from the
process of drivetrain to control system which finally can supply the three-phase grid
3 Wind Energy
The power coefficient (C p ) is a nonlinear function expressed by the fitting
equation in the form
C
c c
c
c
c
i
c
i
p
,
e
λ β
λ
β
λ
λ
( )=
−
−
+
−
1
2
3
4
1
6
1
5
(3.16)
with
1
1
0 08
0 035
1
3
λ λ
β β
i
= +
−
+
.
.
(3.17)
The value of constants c 1 –c 6 has been explained in later section.
Since wind energy is a semiconductor capable of producing energy, in this model
its high efficiency has been calculated to produce electricity power from the interconnected series-parallel configuration of diode model to convert wind energy into
electricity energy that can be supplied in the national grid (Fig. 3.1).
Consequently, using the ideal diode for an array with N s series-connected cells
and N p parallel-connected cells, the array current is calculated as voltage as follows:
I N I
I
q V IR
AKTN
=
−
+
(
) −
p
p h
r s
s
s
exp
1
(3.18)
where
Turbine
Drive train
Wind
Stator
Induction
Generator
Three-phase
Grid
Pitch angle
Cotrol
V r
V gc
Rotor
AC
DC
AC
L
C rotor
AC/DC/AC converter
C grid
Fig. 3.1 Modeling and simulation of wind energy that is converted into electricity energy from the
process of drivetrain to control system which finally can supply the three-phase grid
3 Wind Energy