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 :

  • 2