Adad Thuan Thuan.do Luong.docthanh

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  • 7/30/2019 Adad Thuan Thuan.do Luong.docthanh

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    Bi tp ln o Lng TTCN Khoa in t

    TRNG I HC K THUT CNG NGHIP

    KHOA IN T

    B mn: O LNG IU KHIN

    BI TP LN

    MN HC

    O LNG V THNG TIN CNG NGHIP

    Sinh vin :. .. . NGUYN TH THUN

    Lp . . . .

    K44KMT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

    Gio vin hng dn . PHM VN THIM. . . . . . . . . . . . . . . . . . . . . . . .

    . . .

    GVHD: Phm Vn Thim - 1 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t

    Thi Nguyn 2011

    TRNG HKTCN CNG HO X HI CH NGHA VIT NAM

    KHOA IN T c lp - T do - Hnh phc

    BI TP LN

    MN HC: O LNG V THNG TIN CNG NGHIP

    B MN : O LNG IU KHIN.............................

    Sinh vin: ..... NGUYN TH THUN..................... Lp: K44KMT.................

    Ngnh: K THUT MY TNH

    ..........................................................................................................................................

    .................................

    Gio vin hng dn: PHM VN THIM............

    Ngy giao : 30/10/2011........................ Ngy hon thnh: 5/12/2011......................

    Tn ti.........................................................................................................................

    .........................................................................................................................................

    Yu cu............................................................................................................................

    .........................................................................................................................................

    .........................................................................................................................................

    GVHD: Phm Vn Thim - 2 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t.........................................................................................................................................

    .........................................................................................................................................

    .........................................................................................................................................

    .........................................................................................................................................

    .........................................................................................................................................

    GVHD: Phm Vn Thim - 3 - SVTH: Nguyn ThThun

    GIO VIN HNG DN

    (K v ghi r h tn)

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    Bi tp ln o Lng TTCN Khoa in t .I A(

    .

    U BC)

    .I B(.

    U CA)

    .I C( .U AB)

    Chng minh:

    Cng t o nng lng tc dngXt cng sut tc thi trong mch ba pha l:

    P3f= uAiA + uBiB + uCiC.

    i vi mnh ba pha ba dy,v khng c dy trung tnh ln dng in

    trung tnh bng khng ngha l:iA+ iB+ iC=0 => iC= -(iA+ iB).

    Vy:

    P3pha= uAiA + uBiB- uC(iA+ iB)

    = uAiA + uBiB- uCiA uCiB

    =iA (uA - uC) + iB (uB - uC)

    =iAuAC + iBuBC

    Vy cng sut tc dng ca ba pha l:

    P3pha = UACIA cos(.

    U AC,.

    I A)+ UBCIBcos(.

    U BC,.

    I B)

    Cng t o nng lng phn khngim o m thng l u ngun nn ta coi mch ba pha c ngun i

    xng, ph ti mang tnh cht cm.

    Ta c mmen quay tng ca cng t l:

    Mq=K(IAUBCcos 1 + IBUCA cos 2+ ICUAB cos 3)

    = K [IAUAcos(900-A) + IBUB cos(900-B) + ICUCcos(900-C)]

    GVHD: Phm Vn Thim - 5 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t= K (IAUAsinA + IBUB sin B + ICUC sin C)

    = K Q3pha.

    Ta thy mmen quay t l vi cng sut phn khng trong

    mch ba pha cho nn s ch ca cng t s t l vi nng lngphn khng tiu th trong mch ba pha.

    Hnh 1.1

    Cu 2:chn thang o cho cc thit b o trn s

    1, Chn thang o bin dng in .

    Dng in nh mc pha s cp l:

    GVHD: Phm Vn Thim - 6 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t ( )A

    U

    SI

    dm

    dm

    dm 735.5710.3

    1000

    .3===

    Vy ta chn bin dng in c h s bin dng : Iscm 735.57 (A)

    Itcm= 5 (A)

    Vy chn BI c : KI =5

    75

    2, Chn thang o cho bin in p.

    in p nh mc pha s cp ca my bin p l: UdmBA=10 (KV)

    Cho nn chn BU c h s bin in p: KU= 1,010

    3, Chn thang o cho ampek

    V dng in pha th cp ca BI nh mc l 5(A) nn chn ampeke c thang o

    l: DA=5(A)Dng ampe k in t:

    Ampe k in t c ch to da trn c cu ch th in t.Ampe k ny

    o c c dng mt chiu v dng xoay chiu

    B phn chnh l mt cun dy dn, c th quay quanh mt trc, nm trong t

    trng ca mt nam chm vnh cu. Cun dy c gn vi mt kim ch gc quay

    trn mt thc hnh cung. Mt l xo xon ko cun v kim v v tr s khng khi

    khng c dng in

    Nguyn l hot ng

    Khi dng in mt chiu chy qua cun dy, dng in chu lc tc ng ca t

    trng (do cc in tch chuyn ng bn trong dy dn chu lc Lorentz) v b

    GVHD: Phm Vn Thim - 7 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in tko quay v mt pha, xon l xo, v quay kim. V tr ca u kim trn thc o

    tng ng vi cng dng in qua cun dy

    y l mt thit b thc t o dng in c bn ngoi th trng

    => DA=5(A)

    2, Chn thang o cho volk.

    V in p pha th cp ca BU nh mc l 100(V) nn chn volke c thang ol: DV=100(V)GVHD: Phm Vn Thim - 8 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t. Mch t gm li t bng tn silic c c tnh t tt v cun dy cch in cao.C cu chnh Kim v 0 bng c kh. Cn du n nh kim bng nam chm vnhcu, bng nha baklit c cch in cao. V bng nha ABS. Ca s bngnha PC trong sut (hn ch chy). 2 ci v d cho vic lp t Vn mt vo

    bng in.

    =>DV=100(V)

    GVHD: Phm Vn Thim - 9 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t3, Chn thang o cho cosk .

    Do gc lch pha gia in p v dng in khng ph thuc vo h s bin i

    ca BU v BI nn ta chn thang o cho Cos vi Cos [-11]

    Nguyn l hot ng

    Gc quay ca c cu l:

    GVHD: Phm Vn Thim - 10 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t

    4,o tn s

    Do tn s gia in p v dng in khng ph thuc vo h s bin i ca BUv BI nn ta chn thang o cho thit b o tn s c thang o 0 f 60 (Hz)

    Nh Cung Cp Munhean c nhp t Singapre.

    CngDng

    ng h o tn s

    GVHD: Phm Vn Thim - 11 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in tPhotoHnh nh

    Cat.NoM s

    TypePhn loi

    RangeThang o

    NG H O TN S - HIU MUNHEAN SINGAPORE Mt 96 x96 mm

    CP-96FQP

    Kim 220V ; 45 55Hz

    ng h o tn s met cng hng

    Nguyn l hot ng:

    Tn s mt cng hng gm mt nam chm in,to ra bi cun

    dy qun trn li st t hnh ch U,mt ming thp nm trong t trng ca nam

    GVHD: Phm Vn Thim - 12 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in tchm in,gn cht vo thanh l co l thp rung c tn s dao ng ring khc

    nhau. Tn s dao ng ring ca hai l thp k nhau hn km nhau l 0,25 hoc

    0,5Hz.in p ca tn hiu cn do tn s s c a vo cun dy ca nam

    chm in s to ra s dao ng ca tt c cc l thp.Tuy nhin l thp no c

    tn s dao ng ring bng tn s f th s dao ng cc i do cng hng

    ring,cn cc thanh khc khng cng hng th khng dao ng cc i.Nh vy

    ta s c kt qu ti tr s tng ng vi thanh rung cc i.

    5,Cng t o nng lng

    A, Cng t o nng lng tc dng

    V cho thi gian lm vic trong mt thng t=720h

    Ta c Wtd = .Utcdm.Itcdm.Cos.t

    Vi dng in p th cp cu BU l:

    Utcdm =0,1 (KV) = 100 (V)

    Dng in th cp ca BI l :5 (A)

    Nu Wtdmax Cosmax = 1

    =>Wtdmax = .0,1.5.1.720=623,54 (KWh)

    Vy chn cng t o nng lng tc dng c thang o l 650 (KWh)

    B, Cng t o nng lng phn khng

    GVHD: Phm Vn Thim - 13 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in tTng t ta c t=720h

    Wpk= .Utcdm.Itcdm.Sin.t

    Vi dng in p th cp cu BU l:

    Utcdm =0,1 (KV) = 100 (V)

    Dng in th cp ca BI l :5 (A)

    Nu Wpkmax Sinmax = 1

    =>Wpkmax = .0,1.5.1.720=623,54 (KVArh)

    Vy chn cng t o nng lng phn khng c thang o l 650 (KVArh)

    GVHD: Phm Vn Thim - 14 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t

    GVHD: Phm Vn Thim - 15 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t

    GVHD: Phm Vn Thim - 16 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t

    GVHD: Phm Vn Thim - 17 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t

    GVHD: Phm Vn Thim - 19 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t

    8 Thit b o tn s

    III-Tnh s ch ca mi cng t trong thi gian mt thng, bit rng c 80% thigian my bin p lm vic ch nh mc , 20% thi gian my bin p lm

    vic ch non ti. Xc nh cos tb ca ph ti.

    1, Tnh s ch ca cng t o nng lng tc dng.mc 3pha 2 phn t

    a, S ch ca cng t tc dng trong ch nh mc.

    Thi gian nh mc:

    Tdm = 0,8.24.30 = 576(h)

    Idm = IAdm = IBdm = ICdm = 735.57 (A)

    Udm= 10(KV)

    cos dm = 0,9 dm = 25.84o

    Ta c:

    dmBdmBC

    I

    Bdm

    U

    BCAdmAC

    I

    Adm

    U

    AC TIU

    K

    I

    K

    UIU

    K

    I

    K

    U.,cos..cos..W

    ...

    ,

    .

    cttddm

    +

    =

    = dmBdmBCAdmACI

    dm

    U

    dm TIUIUK

    I

    K

    U.,cos,cos..

    ....

    +

    GVHD: Phm Vn Thim - 20 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t

    = ( ) ( )[ ] 576.84,2530cos84,2530cos.75

    5.735.57.

    10

    1,0.10 0000 ++

    = ( )KWh605,345

    I

    UA

    A

    UAC

    UBC

    UBUCIB

    GVHD: Phm Vn Thim - 21 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t

    Hnh 1.1

    b, S ch ca cng t tc dng trong ch non ti.

    Thi gian non ti:

    Tnt = 0,2.24.30 = 144(h)

    Int = IAnt = IBnt = ICnt = 0,7.Idm =0,7.57,735 = 40,41(A)

    Unt = Udm = 10(KV)

    cos nt = 0,75 nt = 41,4o

    Ta c:

    ntBntBC

    I

    Bnt

    U

    BCAntAC

    I

    Ant

    U

    AC TIUK

    I

    K

    UIU

    K

    I

    K

    U.,cos..,cos..W

    ....

    cttdnt

    +

    =

    = ntBntBCAntACI

    nt

    U

    dm TIUIUK

    I

    K

    U.,cos,cos..

    ....

    +

    = ( ) ( )[ ] 144.4.4130cos4.4130cos.75

    5.41,40.

    10

    1,0.10 0000 ++

    = ( )KWh4,50

    GVHD: Phm Vn Thim - 22 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t

    I

    UA

    A

    UAC

    UBC

    UBUCIB

    Hnh 1.2

    c, S ch ca cng t tc dng trong mt thng.

    ( )Wh005,3964,50605,345WWW cttdntcttddmcttd K=+=+=

    GVHD: Phm Vn Thim - 23 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t2, Tnh s ch ca cng t o nng lng phn khng.

    a, S ch ca cng t phn khng trong ch nh mc.

    Thi gian nh mc:

    Tdm = 0,8.24.30 = 576(h)

    Idm = IAdm = IBdm = ICdm = 57,735(A)

    Udm= 10(KV)

    cos dm = 0,9 sindm= sin(arccos dm) = 0,436

    Ta c:

    ( KVArhhTKI

    KU

    dmdm

    I

    dm

    U

    dm 424,167576.436,0.75

    5.735,57.10

    1,0.10.3.sin...3Wctpkdm ===

    b,S ch ca cng t phn khng trong ch non ti.

    Thi gian non ti:

    Tnt = 0,2.24.30 = 144h

    Int = 0,7Idm = 0,7.57,735 = 40,41(A)

    Unt = Udm = 10(KV)

    Cosnt = 0,75 sindm= sin(arccos dm) = 0,661

    Ta c:

    ( )KVarhhT

    K

    I

    K

    Untnt

    I

    nt

    U

    nt 41,44144.661,0.75

    5.41,40.

    10

    1,0.10.3.sin...3Wctpknt ===

    c,S ch ca cng t pkn khng trong mt thng.

    GVHD: Phm Vn Thim - 24 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t

    ( )KVarhWW ctpkntctpkdm 834,21141,44424,167Wctpk =+=+=

    3, Xc nh costb ca ph ti.

    Ta c :

    ( )9,0

    )424,167(605,345

    605,345cos

    2222=

    +=

    +=

    ctpkdmcttddm

    cttddmtbdm

    WW

    W

    ( )

    75,0)41,44(4,50

    4,50cos

    2222=

    +=

    +=

    ctpkntcttdnt

    cttdnttbnt

    WW

    W

    IV-Tnh sai s tuyt i v sai s tng i ca cc php o trong hai trnghp ph ti.

    Cha sa

    1, Sai s ca cc php o ch nh mc.

    **C s l thuyt tnh sai s tng i , tuyt i

    chnh xc l l tiu chun quan trong nht ca thit b o

    xx dii =

    Trong :xi l kt qu o ca ln o th i

    xd l gi tr ng ca i lng o

    i l sai lch ca ln o th i

    GVHD: Phm Vn Thim - 25 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in tSai s php o l sai lch gia gi tr thc v gi tr o c , sai s

    php o ch c th xc nh 1 cch tng i v ta khng th bit c gi tr

    thc ca i lng cn o

    Sai s ca php c th biu din lm 2 dng

    +Sai s tuyt i

    +Sai s tng i

    Sai s tuyt i ca mt thit b o c nh ngha l gi tr ln nht ca sai

    lch gy nn bi thit b trong khi o.

    ]max[ i=

    Tuy nhin sai s tuyt i cha nh gi c chnh xc v yu cu ca cng

    ngh thit b o.Thng thng chnh xc ca mt php o hoc mt thit b

    o c nh gi bng sai s tng i

    Sai s tng i c tnh vi mt php o

    = vi x l gi tr i lng o

    Sai s tng i c tnh vi mt thit b o

    D=

    vi D l khong gi tr nh nht ti gi tr ln nht

    Gi tr % gi l sai s tng i quy i dng xp xp cc thit b o thnh

    cp chnh xc

    Theo quy nh hin hnh ca nh nc, cc dng c o c in c cp chnh

    xc :0,05;0,1;0,2;0,5;1;1,5;2;2,5 v 4

    Thit b o s c cp chnh xc: 0,005;0,01;0,02;0,05;0,1;0,2;0,5;1

    GVHD: Phm Vn Thim - 26 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in tVy khi bit cp chnh xc ca mt thit b o ta c th xc nh c sai s

    tng i quy i v suy ra sai s tng i ca thit b trong php o c th

    X

    D =

    *Tnh ton sai s ca php o gin tip:

    Gi s c 1 php o gin tip i lng y thng cc php o trc tip 1x , 2x ,..

    nx . y=f( 1x , 2x ,.. nx ).

    Ta c:

    dy= 1 2. . ... . ny y ydx dx dxx x x + + +

    - Sai s tuyt i ca php o gin tip c nh gi:

    y= 2 2 2 21 211 2

    ( . ) ( . ) ... ( . ) ( . )n

    n k

    kn k

    y y y yx x x x

    x x x x=

    + + + =

    1x , 2x ,.. nx : Sai s tuyt i ca php o cc i lng trc tip 1x , 2x ,.. nx .

    - Sai s tng i ca php o gin tip c nh gi:

    y =y

    y

    = 2 2 2 2 2 2 2 2 21 2 1 2

    1 2

    ( ) .( ) ( ) .( ) ... ( ) .( ) ...n nn

    xx xy y yx x x

    y x y x y x

    + + + = + + +

    1x , 2x ,.. nx : Sai s tng i ca php o trc tip cc i lng 1x , 2x

    ,.. nx .

    -Bng tnh sai s ca hm y= 1x . 2x

    GVHD: Phm Vn Thim - 27 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t

    Hm y Sai s tuyt i y Sai s tng i y = y/y

    1x . 2x

    2 2 2 2

    1 2 2 1( ) ( )x x x x +

    2 21 2

    1 2( ) ( )

    x x

    x x

    +

    a, Sai s ca php o dng in.

    Dng in qua cc pha A,B,C ( ba pha nh nhau ) c xc nh.

    Idm = KI.IAdmVi IAm l dng m ampek o c ch nh mc.

    ( )AK

    II

    I

    dmAdm 849,35.

    75

    735,57 ===

    Ta c:

    Sai s tuyt i ca ampek l:

    ( )ADI AAAdm 075,05.100

    5,1. ===

    Sai s tuyt i ca bin dng in l:

    ( )AKK IKII 225,05

    75.

    100

    5,1. ===

    Vy sai s tuyt i ca php o dng in ch nh mc l :

    ( ) ( ) 22 .. AdmIAdmIdm IKIKI +=

    GVHD: Phm Vn Thim - 28 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t

    ( ) ( )

    ( )A37,1

    075,0.15849,3.225,022

    =+=

    Sai s tng i ca php o dng in ch nh mc l:

    %37,2%100.735,57

    37,1%100.% =

    =

    =

    dm

    dmI

    I

    Idm

    b, Sai s ca php o in p.

    Sai s tuyt i ca bin in p:

    ( )VKK UKUU 11,0

    10.

    100

    1. ===

    Sai s tuyt i ca volk :

    ( )VDU VVV 2100.100

    2. ===

    Kt qu o in p dy :

    GVHD: Phm Vn Thim - 29 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t ( )KVUKU VUd 10. ==

    Vi UVddm l dng m volke o c ch nh mc.

    VU =ddV m

    U

    U

    K = ( )V1001,010

    10000=

    Vy sai s tuyt i ca php o in p dy l:

    ( ) ( )2 2dd. .d U V m U V U K U K U = +

    ( ) ( )

    ( )V84,142

    2.100100.122

    =+=

    Sai s tng i ca php o in p dy:

    142,84

    .100% .100% 1, 43%% 10000

    ddm

    ddm d

    U

    U U

    = = =

    Sai s tuyt i ca php o in p pha:

    ( ) ( )2 2

    . .fdm U fdm U V

    U K U K U = +

    ( )2

    2. .

    3

    Vddmfdm U U V

    UU K K U

    = +

    GVHD: Phm Vn Thim - 30 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t

    ( )

    ( )

    2

    21001. 100.2

    3

    208,17 V

    = +

    =

    Sai s tng i ca php o in p pha :

    %

    208,17.100% .100% 2, 0817%

    10000

    f

    Ufdmf

    U

    U

    = = =

    c, Sai s ca php o nng lng tc dng.

    Nng lng tc dng ca ph ti ch nh mc l:

    ( )Wh5,548407605,365.

    5

    75.

    1,0

    10W..W cttddmtddm KKK IU ===

    Sai s tuyt i ca cng t tc dng ch nh mc trong vng mt thng

    cttddmcttd D.Wcttddm =

    chn cng t o nng lng tc dng c thang o l 650 (KWh)

    Ta c : =cttddmD ( )Wh650 KDcttdnt =

    ( )KWh75,9650.100

    5,1Wcttddm ==

    GVHD: Phm Vn Thim - 31 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in tVy sai s tuyt i ca php o nng lng tc dng ch nh mc l :

    ( ) ( ) ( ) 222tddm ......W cttddmIUcttddmIUcttddmIU WKKWKKWKK ++=

    ( ) ( ) ( ) 222 75,9.15.100605,365.225,0.100605,365.15.1 ++=

    ( )KWh18,17653=

    Sai s tng i ca php o nng lng tc dng l :

    %22.3%100.5,548407

    18,17653%100.

    tddmW=

    =

    =

    tddm

    tddm

    W

    W

    d, Sai s ca php o nng lng phn khng .

    Nng lng phn khng ca ph ti ch nh mc l :

    ( )KVarhKK IU 251136424,167.15.100W..W ctpkdmpkdm ===

    Sai s tuyt i ca cng t phn khng :

    ctpkdmctpk D.Wctpkdm =

    chn cng t o nng lng phn khng c thang o l 650 (KVArh)

    Ta c:

    ( )KVarhDD ctpkmtctpkdm 650==

    ( )KVarhWctpkdm 75,9650.100

    5,1==

    Vy sai s tuyt i ca php o nng lng phn khng l :

    GVHD: Phm Vn Thim - 32 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t ( ) ( ) ( )222pkdm ......W ctpkdmIUctpkdmIUctpkdmIU WKKWKKWKK ++=

    ( ) ( ) ( ) 222 75,9.15.100424,167.225,0.100424,167.15.1 ++=

    ( )KVarh74,15309=

    Sai s tng i ca php o nng lng phn khng l:

    %1,6%100.

    251136

    74,15309%100.

    pkdmW =

    =

    = pkdm

    pkdm

    W

    W

    2, Sai s ca cc php o ch non ti.

    a, Sai s ca php o dng in

    Dng in ch non ti c xc nh :

    Int = KI.IAnt

    C : IAnt = 0,7.IAdm = 0,7.3,849 = 2,694(A)

    Int = 15.2,694 = 40,41(A)

    Sai s tuyt i ca ampek :

    ( )AII AdmAnt 1,0==

    Vy sai s tuyt i ca php o dng in ch non ti l :

    GVHD: Phm Vn Thim - 33 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t ( ) ( ) 22 .. AntIAntInt IKIKI +=

    ( ) ( )

    ( )A28,1

    075,0.15649,2.225,022

    =

    +=

    Sai s tng i ca php o dng in ch non ti l :

    %17,3%100.41,40

    28,1%100.% =

    =

    =nt

    ntI

    I

    Int

    b, Sai s ca php o nng lng tc dng .Nng lng tc dng ca ph ti ch non ti l:

    ( )Wh756004,50.5

    75.

    1,0

    10W..W cttdnttdnt KKK IU ===

    Sai s tuyt i ca cng t tc dng ch non ti :

    cttdntcttd D.Wcttdnt =

    Ta c :

    ( )KWhDcttdnt 650=

    ( )KWh75.9650.100

    5,1Wcttdnt ==

    Vy sai s tuyt i ca php o nng lng tc dng ch non ti l

    GVHD: Phm Vn Thim - 34 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t( ) ( ) ( ) 222tdnt ......W cttdntIUcttdntIUcttdntIU WKKWKKWKK ++=

    ( ) ( ) ( ) 222 75,9.15.1004,50.225,0.1004,50.15.1 ++=

    ( )KWh37,14688=

    Sai s tng i ca php o nng lng tc dng ch non ti:

    %42,19%100.75600

    37,14688%100.

    tdnt

    W =

    =

    =tdnt

    tdnt

    W

    W

    c, Sai s ca php o nng lng phn khng.

    Nng lng phn khng ca ph ti ch non ti l :

    ( )KVarhKK IU 615,6641,44.15.100W..W ctpkntpknt ===

    Sai s tuyt i ca cng t phn khng ch non ti :

    ctpkdmctpk D.Wctpkdm =

    Ta c :

    ( )KVarhDD cttdntctpknt 650==

    ( )KVarhWctpknt 75,9650.100

    5,1 ==

    Vy sai s tuyt i ca php o nng lng phn khng ch non ti l :

    GVHD: Phm Vn Thim - 35 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t ( ) ( ) ( )222

    pknt ......W ctpkntIUctpkntIUctpkntIU WKKWKKWKK ++=

    ( ) ( ) ( ) 222 75,9.15.10041,44.225,0.10041,44.15.1 ++=

    ( )KVarh22,14674=

    Sai s tng i ca php o nng lng phn khng ch non ti l:

    %03,22%100.66615

    22,14674%100.

    pkntW=

    =

    =

    pknt

    pknt

    W

    W

    Phn II:

    Thu thp tn hiu truyn dn cho trm bin p.Vi s lng knh thu thp12.

    S dng m hnh ni tip song song thu thp tn hiu.

    *S lng knh 12 tng ng:S1,S2,..S12.

    *Chn cc Mux: Chn Mux CD4051B.

    Thit k b Mux chn tn hiu dng in trn cc pha

    + S1=D0 : Dng in qua pha A

    S2=D1: Dng in qua pha B

    S3=D2: Dng in qua pha C

    S dng b Mux 1 c 2 chn a ch m ha 3 chn d liu vo

    GVHD: Phm Vn Thim - 36 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t

    Bng trng thi

    A1 C1 Q1

    O O 1 D0

    O 1 1 D1

    1 O 1 D2

    u ra:

    1 1 0 1 0 0 1 1 0 1 2Q C [A .A .D A .A .D A .A .D= + +

    Thit k b Mux chn tn hiu in p

    in p pha A S4=D4

    in p pha B S5=D5

    in p pha C S6=D6

    in p pha AB S7=D7

    in p pha BC S8=D8

    in p pha CA S9=D9

    GVHD: Phm Vn Thim - 37 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in tChn b mux c 3 chn a ch m ha 6 chn d liu

    Bng trng thi

    A3 A4 C2 Q1

    0 0 0 1 D3

    0 0 1 1 D4

    0 1 0 1 D5

    0 1 1 1 D6

    1 0 0 1 D7

    1 0 1 1 D8

    u ra:

    2 2 2 3 4 3 2 3 4 4 2 3 4 5 2 3 4 6Q C [A .A .A .D A .A .A .D A .A .A .D A .A .A .D= + + + +

    . . . . . ]2 3 4 7 2 3 4 8A A A D A A A D+

    Thit k b mux chn tn hiu cos, tn s, cng t do nng lng

    +1 tn hiu cos do nng lng mt pha: S10=D9

    + 1 tn hiu tn s 3 pha: S11=D10

    GVHD: Phm Vn Thim - 38 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t+ 1 cng t do nng lng: S12=D11

    S dng b mux c 2 chn a ch m ha 3 chn d liu

    Q1=D12

    Q2=D13

    Q3=D14

    Bng trng thi

    A6 C3 Q1

    0 0 1 D9

    0 1 1 D10

    1 0 1 D11

    u ra:

    3 3 5 6 9 5 6 10 5 6 11Q C [A .A .D A .A .D A .A .D= + +

    Thit k b MUX chn 3 tn hiu t 3 b mux1,mux2,mux3

    GVHD: Phm Vn Thim - 39 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t

    A8 C Q

    0 0 1 D12

    0 1 1 D131 0 1 D14

    u ra:

    7 8 12 7 8 13 7 8 14[A .A .D A .A .D A .A .DQ C = + +

    GVHD: Phm Vn Thim - 40 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t

    *Lp bng trng thi tng th

    Tn hiu vo Chn clock Tn hiu ra

    A0 A1 A2 A3 A4 A5 A6 A7 A8 C1 C2 C3 CQ1 Q2 Q3 Q

    S1 0 0 X X X X X 0 0 1 0 0 1 D0 X X D12

    S2 0 1 X X X X X 0 0 1 0 0 1 D1 X X D12

    S3 1 0 X X X X X 0 0 1 0 0 1 D2 X X D12

    S4 X X 0 0 0 X X 0 1 0 1 0 1 X D3 X D13

    S5 X X 0 0 1 X X 0 1 0 1 0 1 X D4 X D13

    S6 X X 0 1 0 X X 0 1 0 1 0 1 X D5 X D13

    S7 X X 0 1 1 X X 0 1 0 1 0 1 X D6 X D13

    S8 X X 1 0 0 X X 0 1 0 1 0 1 X D7 X D13

    S9 X X 1 0 1 X X 0 1 0 1 0 1 X D8 X D13

    S10 X X X X X 0 0 1 0 0 0 1 1 X X D9 D14

    S11 X X X X X 0 0 1 0 0 0 1 1 X X D10 D14

    S12 X X X X X 0 1 1 0 0 0 1 1 X X D11 D14

    GVHD: Phm Vn Thim - 41 - SVTH: Nguyn ThThun

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    Bi tp ln o Lng TTCN Khoa in t