Thiet Ke TBA 220KV

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    TONG QUAN CHNG 1

    SVTH: TRN ANH TRUNG GVHD: L NH LNG4

    LI CM N

    Em chn thnh cm n Thy L nh Lng trc tip hng dn, cung cp

    ti liu v to mi iu kin em hon thnh n mn hc ny.

    Em cng xin gi li cm n n Thy- Trn Thanh Sn cng cc thy c trong

    khoa in-in t ging dy, truyn t v trang b kin thc cho em trong sut

    thi gian em hc Trng i Hc K Thut Cng Ngh Thnh Ph H Ch Minh

    hon thnh n mn hc ny.

    Trong qu trnh lm n mn hc, do thi gian hn ch nn ti em hon

    thnh s khng trnh khi nhng thiu st, mong cc Thy-C thng cm b qua v

    ch dn thm cho em. Em xin lng nghe v tip thu nhng kin ng gp t Thy-

    C.

    Ngi thc hin

    Trn Anh Trung

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    TONG QUAN CHNG 1

    SVTH: TRN ANH TRUNG GVHD: L NH LNG5

    MC LC

    LI CM N trang 01

    CHNG 1: TNG QUAN trang 04

    CHNG 2: TNG HP TH PH TI trang 09

    CHNG 3:CHN S CU TRC V S NI IN trang 15

    CHNG 4: CHN MY BIN P V TNH TN THT IN NNG trang 24

    CHNG 5: TNH TON NGN MCH V TDNG trang 36

    CHNG 6: CHN KH CIN V CC PHN DN IN trang 43

    PHN PHLC trang 67

    - S NGUYN L CA TRM BIN P

    - S MT BNG TRM

    Ti liu tham kho:

    - Thit k nh my in v trm bin p Tc gi: HYNH NHN

    - Thit k nh my in v trm bin p Tc gi: NGUYN HU KHI

    - Hng dn thit k n Cung cp in Tc gi: PHAN TH THU VN

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    TONG QUAN CHNG 1

    SVTH: TRN ANH TRUNG GVHD: L NH LNG6

    NHAN XET CUA GIAO VIEN

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    TONG QUAN CHNG 1

    SVTH: TRN ANH TRUNG GVHD: L NH LNG7

    TONG QUAN

    1.1 GII THIEU TONG QUAN VE TRAM BIEN AP

    1.1.1 Khai niem:

    Tram bien ap la mot trong nhng phan t quan trong nhat trong he thong ien.No co nhiem vu chnh la bien ien ap en mot cap thch hp nham phuc vu choviec truyen tai va cung cap ien en phu tai tieu thu. Tram bien ap tang ap nangien ap len cao e truyen tai i xa, ngc lai tram bien ap ha ap giam ien ap

    xuong thap thch hp e cap cho cac phu tai tieu thu.

    1.1.2 Phan loai:

    Tram bien ap c phan loai theo ien ap, quy mo va cau truc xay dng cuatram.

    a. Theo ien ap th co hai loai:- Tram tang ap: thng at nhng nha may ien co nhiem vu nang ien ap

    au cc may phat len cao e truyen tai i xa.

    - Tram ha ap: thng at nhng tram phan phoi, no nhan ien t he thongtruyen tai roi giam ien ap xuong cap thch hp e cung cap ien cho cac phu taitieu thu.

    b. Theo mc o quy mo cua tram bien ap, ngi ta chia thanh hai loai:- Tram bien ap trung gian hay con goi la tram bien ap khu vc: thng co

    ien ap s cap ln, cung cap ien cho mot khu vc phu tai ln cac vung mien,tnh thanh, khu cong nghiep ln, ien ap pha s cap thng la 500; 220; 110kV, ien ap pha th cap thng la 110; 66; 35; 22; 15 kV.

    - Tram bien ap phan phoi hay con goi la tram bien ap a phng: nhan ient cac tram bien ap trung gian (tram bien ap khu vc) e cung cap trc tiep cho cacphu tai nh x nghiep, khu dan c, qua cac ng day phan phoi.

    c. Theo cau truc xay dng th co hai loai sau:- Tram bien ap ngoai tri: Phu hp vi cac tram khu vc va tram a phng

    co cong suat ln.

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    TONG QUAN CHNG 1

    SVTH: TRN ANH TRUNG GVHD: L NH LNG8

    - Tram bien ap trong nha: Phu hp vi cac tram a phng va cac nha mayco cong suat nho.

    1.1.3 Cac thanh phan chnh cua tram bien ap:

    - May bien ap trung tam.- He thong thanh cai, dao cach ly.- He thong relay bao ve.- He thong noi at, he thong chong set.- He thong ien t dung.- Khu vc phong ieu hanh.- Khu vc phong phan phoi.

    1.2 NHNG VAN E CHNH KHI THIET KE TRAM BIEN AP1.2.1 Nhng van e can lu y khi thiet ke tram bien ap:

    - Tram bien ap nen at gan cac phu tai.- Thuan tien giao thong e de dang chuyen ch cac thiet b xay dng tram.- Khong nen at cac trung tam thanh pho v se lam tang chi ph au t cung

    nh lam mat my quan o th.

    - Nen at tram nhng ni kho rao, tranh nhng khu vc am t hoac mcnc ngam cao hn ay mong.

    - Tranh at tram cac vung at de sat l.- Tranh xa cac khu vc de chay no.

    Tom lai: Viec chon v tr co nh at tram bien ap la kha quan trong v nose quyet nh ve chi ph, tnh an toan va thuan tien khi van hanh.

    1.2.2 Yeu cau khi thiet ke tram bien ap:

    - Tram bien ap cung cap ien cho ho tieu thu la phai am bao u ien nangvi chat lng nam trong pham vi cho phep. Ngoai ra phai am bao ve mat kinh te,an toan, mot phng an c xem la hp ly khi thoa man cac yeu cau sau:

    o am bao chat lng ien nang.o am bao o tin cay cao (tuy theo tnh chat loai phu tai).o Von au t thap.o An toan cho ngi va thiet b.

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    TONG QUAN CHNG 1

    SVTH: TRN ANH TRUNG GVHD: L NH LNG9

    o Thuan tien sa cha, van hanh.o Co tnh kha thi.

    - Tuy nhien nhng yeu cau tren thng mau thuan vi nhau do o khi thiet kecan ket hp hai hoa tng yeu cau e tao ra phng an toi u.1.3 GII THIEU CHUNG VE TRAM BIEN AP SE THIET KE

    Thiet ke tram bien ap 220/110/22 kV co cac thong so nh sau:

    a. He thong:

    Tram bien ap c noi vi he thong co cac thong so nh sau:

    - Cong suat he thong: SHT = 2000 MVA.- ien khang he thong: xHT = 0,35-

    Cung cap ien cho tram bang hai ng day dai = 35 kmb. Phu tai khu dn c220 kV:

    Phu tai khu dn c 220 kV co cac thong so nh sau:

    - Cong suat: Smax = 80 MVA- He so cong suat: cos = 0,85- So ng day: 4- o th phu tai cap 220 kV nh sau:

    c. Phu tai khu nh my 110 kV:

    S%

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    TONG QUAN CHNG 1

    SVTH: TRN ANH TRUNG GVHD: L NH LNG10

    Phu tai khu nh my 110 kV co cac thong so nh sau:

    - Cong suat: Smax = 50 MW- He so cong suat: cos = 0,80- So ng day: 2- o th phu tai cap 110 kV nh sau:

    d. Phu tai khu nng nghip 22 kV:

    Phu tai khu nng nghip 22 kV co cac thong so nh sau:

    - Cong suat: Smax = 30 MW- He so cong suat: cos = 0,80- So ng day: 4- o th phu tai cap 22 kV nh sau:

    S%

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    TONG QUAN CHNG 1

    SVTH: TRN ANH TRUNG GVHD: L NH LNG11

    e. T dung cua tram bien ap:T dung cua tram co cac thong so nh sau:

    - Cong suat: Smax = 0,5 MVA- He so cong suat: cos = 0,80

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    TONG QUAN CHNG 1

    SVTH: TRN ANH TRUNG GVHD: L NH LNG12

    CHNG 2

    TONG HP O TH PHU TAI

    Tong hp o th phu tai la cong hai hay nhieu o th phu tai cac cap ienap do tram bien ap cung cap ien. Phu tai nay bao gom ca phan ton hao trongtruyen tai (qua may bien ap) va phan t dung phuc vu cho viec san xuat va truyentai ien nang.

    T dung cua tram bien ap khong phu thuoc hoan toan vao cong suat cua

    tram bien ap ma chu yeu phu thuoc vao tram bien ap co hay khong co ngi trcthng xuyen va vao he thong lam mat cua may bien ap (lam mat t nhien, quatgio, he thong bm dau, nc tuan hoan cng bc, ).

    e tong hp o th phu tai co the dung phng phap ve tong hp cac o thphu tai a cho hay thanh lap bang tong hp o th phu tai theo phng phap lapbang cho P va Q tnh S neu cos khac nhau.

    2.1 O TH PHU TAI CUA CAP 220 kV

    Thntg s cp 220 kV:Smax = 80 (MVA) cos = 0.85 tg = 0.62So ng day: 4 x 10 km Um = 220 KV

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    TONG QUAN CHNG 1

    SVTH: TRN ANH TRUNG GVHD: L NH LNG13

    P = S x cos = 80 x 0.85 = 68 (MW) Q = P x tg = 68 x 0.62 = 42.16 (MVar)

    - T thong so cua cap 220 kV ta tnh c cac gia tr sau:STT Thi gian (h) S% S (MVA ) P (MW) Q (MVAR)

    1 0 (h) -> 4 (h) 60 48 40.80 25.302 4 (h) -> 8 (h) 80 64 54.4 33.733 8(h) ->12(h) 80 64 54.4 33.734 12(h) ->14(h) 80 64 54.4 33.735 14(h) ->16(h) 80 64 54.4 33.736 16(h) ->20(h) 100 80 68 42.167 20(h) ->24(h) 80 64 54.4 33.73

    Vi S = 100

    %max iSS

    ; P = Si x cos ; Q = Pi x tg

    2.2 O TH PHU TAI CUA CAP 110 kV

    Thntg s cp 110 kV:Smax = 50 (MVA) cos = 0.80 tg = 0.75So ng day: 2 x 15 km Um = 110 KV

    P = S x cos = 50 x 0.80 = 40 (MW) Q = P x tg = 40 x 0.75 = 30 (MVar)

    - T thong so cua cap 110 kV ta tnh c cac gia tr sau:STT Thi gian (h) S% S (MVA ) P (MW) Q (MVAR)

    1 0 (h) -> 4 (h) 60 30 24 18

    S%

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    TONG QUAN CHNG 1

    SVTH: TRN ANH TRUNG GVHD: L NH LNG14

    2 4 (h) -> 8 (h) 80 40 32 243 8(h) ->12(h) 100 50 40 304 12(h) ->14(h) 80 40 32 245 14(h) ->16(h) 80 40 32 24

    6 16(h) ->20(h) 100 50 40 307 20(h) ->24(h) 80 40 32 24

    Vi S =100

    %max iSS ; P = Si x cos ; Q = Pi x tg

    2.3O TH PHU TAI CUA CAP 22 kV

    Thntg s cp 22 kV:Smax = 30 (MVA) cos = 0.80 tg = 0.75So ng day: 4 x 15 km Um = 22 KV

    P = S x cos = 30 x 0.80 = 24 (MW) Q = P x tg = 24 x 0.75 = 18 (MVar)

    - T thong so cua cap 22 kV ta tnh c cac gia tr sau:STT Thi gian (h) S% S (MVA ) P (MW) Q (MVAR)

    1 0 (h) -> 4 (h) 60 18 14.4 10.8

    24 (h) -> 8 (h) 80 24 19.2 14.4

    3 8(h) ->12(h) 100 30 24 184 12(h) ->14(h) 100 30 24 185 14(h) ->16(h) 100 30 24 186 16(h) ->20(h) 100 30 24 187 20(h) ->24(h) 80 24 19.2 14.4

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    TONG QUAN CHNG 1

    SVTH: TRN ANH TRUNG GVHD: L NH LNG15

    Vi S =1