Grid Integration of 950kW Wind Turbine
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Wind Energy Conversion Systems (WECSs) exhibit variability in their output power as a result of change in their prime movers (wind speed).This introduces a new factor of uncertainty on the grid and poses a lot of challenges to the power system planners and the utility operators in terms of the power system grid integrity i.e. power system security, power system stability and power quality. The project includes the complete design and simulation (under steady state conditions) of the components used for the connection of a Wind Turbine to the electrical network in respect of power system grid integrity
Transcript of Grid Integration of 950kW Wind Turbine
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DATASHEETS..................................................................................................45
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. block..
/ :
2 31
2wg pP C r d v
d = , v = , r = , pC = / ( Cp= /mP Pa Pm Pa ) Cp. Cp .
/ . Cp, . / . . / :
)
)
) .
/ :
N gdc dP V I
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Vgdc Id , Vgdc ( ) , :
GLLgdc VV 23
Id gdc ndc
d
V VI
r
Id Vndc, Vgdc r .
Vndc thyristors . Id .
.
1. : .
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2. : ( Pn Vn ), ( ) .
LLG NV V DC :
3 2 3 2690 931.827
gdc LLGV V V
Id :3950 10
1019.502931.827
NN gdc d d
gdc
PP V I I A
V
DC :
809.487Vgdc d ndc ndc gdc dV I r V V V I r : : 690b NV V V
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: 1117.647cos
Nb N
PS S KVA
:
2 2
( ) 3
6900.42598
1117.647 10b
b G
b
VZ
S
sX =0,61 pu :
( )0.61 0.25985 S b GZ 0,82713 mH2S
SL f
: '
LLGE V
' '3 1 31.35 ( ) 877.633 V1.35gdc LLG S d LLG gdc S d
V V I E V V I
:
: 690bV V : 1250 VAb trS S
:
2 2
( ) 3
6900.3809
1250 10b
b trb
VZ
S
:
( ) ( )k Tu pu x pu( ) 6%ku pu
( ) 0,02285 tr k b trX u Z
0,07273 mH2
trtrL
f
3 Choke: 5.5% 0.055chX
( )0.055 0.02095 ch b trX Z
0.066686 mH2
chch
XL
f
. : chL trL :
0,139416 mHtot tr chL L L
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( )
E Ls Xs Vgdc Id
877.633V 0.82713mH 0.25985 931.827V 1019.502A
Vndc Xtr Ltr Lch Xch809.487V 0.02285 0.07273mH 0.06669mH 0.02095
1H thyristors ( dc ).
thyristor ( Vd=Vndc) :
3 33 2 3 2cos cos
3 1cos ( ) * 0.82295
3 2 3 2
tot totd LL d LL d d
totd d
LL
L LV V a I V a I V
La I V
V
= 145.381 Psim ( , ), 30 . 1 2 gating block 175 176 .
2 L1 .
:
2cos 1 0,57311
2d
ds IuE
55.033du
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:2
cos( ) cos 0,91447 156.132
tot dth th
N
L Ia u a a u
V
10.74957thu
L1 (t=0) 3 1 , D5 D1. :
2
2 sin
ucommon an cn La Lc s
common LL
diV V V V V L
dt
V V t
2
sin ( )2
u
s
Edi td t
L
) : (2) (2+u) u=55.033 5 3 1
1 => au ii 2
2
2sin ( )
2
k t
u
ks
Ei td t
X
2388.217 (1 cos )a ui i t
) : (2+u) (2+120) u=55.033 1 1 ( ).
1019.502a di I A
) (2+120) (2+120+u) u=55.033 1 1 3 2.
a d ui I i , 2388.217 (1 cos( 120 ))ui t
1019.502 2388.217 (1 cos( 120 ))ai t A
) (2+120+u) (2+180) u=55.033 1 , :
0ai A
) (2+180) (2+180+u) u=55.033 2 3 4 1. : a ui i . :
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2388.217 (cos( 180) 1)ai t A
) (2+180+u) (2+180+120) u=55.033 4 1. :
1019.502a di I A
) (2+180+120) (2+180+120+u) u= 55.033 4 1 6 2. ( )a d u d ui I i I i . :
1019.502 2388.217 (1 cos( 300))ai t A
) (2+180+120+u) (2+360) u=55.033 1.
Aia 0
L1 / :2388.217 (1 cos )
1019.502
1019.502 2338.217 [1 cos( 120)]
0
2388.217[cos( 180) 1]
1019.502
2388.217 [1 cos( 300)] 1019.502
0
a
t A
A
t A
Ai
t A
A
t A
A
2 2 55.033
2 55.033 2 120
2 120 2 175,033
2 175.033 2 180
2 180 2 235,033
2 235.033 2 300
2 300 2 355,033
2 355,033 2( 1)
k t k
k t k
k t k
k t k
k t k
k t k
k t k
k t k
L1 (t=0) 3 1 . . Psim , Choke u=10.74957. :
) : (2) (2+u) u=10.74957 (0 , 0) ( u , Id) (10.74957 , 1019.502).
(1019,502 /10, 74957) 94,841ai t tA
) ( 2+ u , 2+120) u=10.74957
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1019,502a di I A
) ( 2+120, 2+120+ u) u=10.74957 (120 , d) (120 + u , 0) (120 , 1019.502) (130.74957,0).
94.841 t 12400.42ai A
) ( 2+120 + u , 2+180) u=10.74957
0ai A 2 .
L1 :94.841 t
1019.502
94.841 12400.42
0
94.841 17071.38
1019.502
94.841 29471.8
0
a
A
A
t A
Ai
t A
A
t A
A
2 2 10.74957
2 10.74957 2 120
2 120 2 130.74957
2 130.74957 2 180
2 180 2 190.74957
2 190.74957 2 300
2 300 2 310.74957
2 310.74957 2( 1)
k t k
k t k
k t k
k t k
k t k
k t k
k t k
k t k
3 Excel (2). Psim.
PSIM & EXCEL PSIM ( DC DC Id ). EXCEL L1 ( L2,L3 L1 120)
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/
-1500
-1000
-500
0
500
1000
1500
0 60 120 180 240 300 360
/
()
()
L1 L2 L3
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-1500
-1000
-500
0
500
1000
1500
0 60 120 180 240 300 360
()
()
L1L2L3
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4 . ( ) Psim.
( ) :
2 21019.502 832.42
3 3Is Id A
Psim :
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( ) : :
2 21019.502 832.42
3 3Is Id A
Psim ( ) :
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: , . . . ( uth = 12.515deg) , ( ud= 55.033deg) .
5 ( ) dc . .
dc .
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dc & .
dc .
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dc & .
6 D1 Thyristor 1
D1
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T1 (th1)
7 ( ) thyristor .
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8 Thyristor . Psim .
1D :
0
1 T
D DI I dtT =
23
0
1( )DI d t
= 1 2
2 3d
= 3d =339.834
1D :
23
2
0
1Drms dI I dtT
=2
32
0
1( )dI d tT
=21 2
2 3dI
= 3
dI =588.61
1T :
0
1 T
T dI I dtT =
23
0
1( )dI d tT
=1 2
2 3d
= 3d =339.834
1T :
23
2
0
1Trms dI I dtT
=2
32
0
1( )dI d tT
=21 2
2 3dI
= 3
dI =588.61
Psim :
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