Trm 110 KV E2 ng Hi Qung Bnh gm hai my bin p vi cng sut mi my l 25 MVA, v thng s k tht c th ca mi my nh sau

TRNG CAO NG IN LC MIN TRUNG

BO CO THC TP TT NGHIP

NHN XT- NH GI CA TRM BIN P 110KV NG HINHN XT-NH GI CA CHI NHNH IN CAO TH QUNG BNH

LI NI UT

rong s nghip cng nghip ha, hin i ha t nc, in nng ng mt vai tr quan trng trong nn kinh t quc dn. Cng vi s pht trin khng ngng ca cc ngnh cng nghip, h thng in ca nc ta cng ngy cng pht trin nhanh chng, tnh chuyn nghip trong qun l v vn hnh h thng ngy cng nng cao, m bo thc hin cc qu trnh sn xut, truyn ti v phn phi in nng.

i vi h thng in Qung Bnh, trong nhng nm qua cng c nhng s pht trin ng k, nhiu ng dy c ci to, nng cp, nhiu trm bin p c xy dng, cc thit b trong trm c thay mi, tnh hiu qu trong vic qun l vn hnh trm c nng cao.

Trm bin p 110 kV ng Hi l mt trong nhng trm c xy dng sm nht Qung Bnh, l ngun cp in phc v cho s pht trin kinh t, chnh tr, x hi ca thnh ph ng Hi v cc vng ln cn.

c Khoa in- Trng HBK Nng phn cng thc tp ti Trm bin p 110 kV ng Hi l mt c hi chng em- nhng sinh vin nm cui ca ngnh H thng in c c nhng kin thc thc t trong vic qun l vn hnh Trm bin p. c tip xc, tm hiu cc thit b di s hng dn ca cc nhn vin trong trm gip chng em c c nhng kinh nghim thc tin b ch. Chng em xin cm n cc anh, cc bc, cc c nhn vin trong trm tn tnh hng dn, gip chng em trong thi gian thc tp.

Do thi gian thc tp c hn v s hiu bit ca chng em cng c nhiu hn ch nn trong bn bo co ny khng trnh khi c nhng sai st. Knh mong cc anh, cc bc, cc c trong trm cng cc thy c gio ch bo thm cho chng em.

Xin chn thnh cm n!

ng Hi thng 01 nm 2012

CHNG I: TNG QUAN V T CHC CNG TY LI IN CAO TH MIN TRUNG I. C CU T CHC:1.Cp cng ty: Gm 1 Gim c v 2 ph Gim c a) Cc phng nghip v: Phng t chc nhn s

Phng k hoch

Phng k thut

Phng ti chnh, k ton

Phng vt t

Phng vn hnh, thng tin

Phng an ton, thanh tra, bo v

Phng qun l u t

b) Cc chi nhnh in cao th trc thuc:

CNCT Qung Bnh

CNCT Qung Tr

CNCT Tha Thin Hu

CNCT Qung Nam - Nng

CNCT Qung Ngi

CNCT Ph Yn

CNCT Kontum

CNCT Gia Lai

CNCT aklak

CNCT ak Nng

X nghip sa cha th nghim X nghip thy in An im

X nghip thy in Ry Linh

X nghip thy in ry HLinh

X nghip thy in Kon o

2. Cp chi nhnh:

- Ban Gim c: bao gm 1 Gim c v 1 Ph Gim c

- Cc phng ban:

Phng Tng hp

Phng K hoch-Vt t

Phng K thut

TBA Sng Gianh

TBA Ba n

TBA Bc ng Hi

TBA ng Hi

TBA ng Sn

TBA L Thy

Phn xng qun l vn hnh ng dy ng Hi Phn xng qun l vn hnh ng dy Ba n

3. Cp trm: TBA 110kV ng Hi bao gm 11 ngi c t chc nh sau:

- 1 trm trng - 5 trc chnh

- 5 trc ph

nh bin m bo ch 3 ca, 5 kpCHNG II:TNG QUAN TRM BIN P 110kV NG HII.C IM,VAI TR:

Trm Bin p 110KV ng Hi c xy dng v a vo vn hnh t thng 11 nm 1989, ly ngun t Trm bin p truyn ti 220/110 KV ng Hi (E1). Trm c nhim v cp in cho Thnh ph ng Hi - trung tm chnh tr, kinh t, vn ha, x hi ca Tnh Qung Bnh, ngoi ra Trm cn cung cp in cho cc vng ln cn Thnh ph ng Hi. Trm bin p 110 KV ng Hi l trm cp ngun v cng quan trng cung cp hn 1/2 sn lng in ca ton Tnh Qung Bnh. T khi c xy dng cho n nm 2006-TBA 110kV ng Hi trc thuc in lc Qung Bnh, Cng ty in lc Min Trung. T thng 3 nm 2006 Cng ty in lc Min Trung thnh lp X nghip in cao th Min Trung (nay l Cng ty li in cao th Min Trung), t n nay Trm 110 kV ng Hi trc thuc Chi nhnh in cao th Qung Bnh, Cty LCTMT, Tng Cng ty in lc Min Trung. Nhim v chnh ca Trm 110 kV ng Hi l qun l thit b, vn hnh 2 MBA T1,T2 theo phng thc ca cc cp iu , phc v cp in cho cc ph ti cp in p 35 kV, 22 kV nhm cung cp cho ton b ph ti ca Thnh ph ng Hi v cc vng ln cn.II.PH TI CC CP IN P: Pha 35 kV gm c cc xut tuyn:

+ Xut tuyn 371 cp in cho Nam Qung Bnh.

+ Xut tuyn 372 cp in cho Bc Qung Bnh.+ Xut tuyn 374 cp in cho i pht thanh.

+ Xut tuyn 373 dng d phng. Pha 22 kV gm c cc xut tuyn:

+ Xut tuyn 471 cp in cho Hi Thnh.+ Xut tuyn 472 cp in cho Trung Ngha.+ Xut tuyn 473 cp in cho Bo Ninh.+ Xut tuyn 474 cp in cho ng M.+ Xut tuyn 475 cp in cho Thun c.+ Xut tuyn 476 cp in cho Quang Ph.+ Xut tuyn 442 dng cung cp cho t dng TD42.III.NHIM V NHN VIN QUN L VN HNH:

1. Nhim v chung:

1.1. Tt c CBCNV QLVH TBA 110kV ng Hi c chung nhim v sau y:

- Chp hnh lnh ch huy iu ca cc cp iu (theo quyn iu khin).

- Thng xuyn theo di v kim tra thit b thuc quyn qun l ca trm, m bo vic vn hnh an ton, lin tc, khng xy ra cc s c ch quan, x l cc s c kp thi v ng quy trnh.

- Bo co vi Lnh o Trm, Lnh o X nghip v cc cp iu tng ng v cc vn vn hnh thit b trong trm. Cung cp s liu theo yu cu ca cc cp iu .

- Nm vng s , thng s k thut, ch vn hnh ca thit b trong trm.

- T gic v nghim chnh chp hnh k lut lao ng, k lut sn xut, cc quy trnh, quy phm v k thut vn hnh, k thut an ton v phng chy cha chy, phng chng chy n, phng chng bo lt.

- Khng ngng nng cao cht lng cng tc qun l vn hnh v hiu qu ca cng vic. Pht huy sng kin ci tin k thut cng tc qun l vn hnh ngy cng hiu qu.

1.2. Cc nhn vin trm bin p phi hiu k, nm vng kin thc:

1. V thit b:

Nm c cu to, nguyn l lm vic v thng s vn hnh ca cc thit b trong trm nh: my bin p, my ct, dao cch ly, my bin in p (TU); h thng rle bo v, thng s chnh nh v phm vi bo v, h thng thng tin lin lc, h thng bo v rle v t ng ... v tr lp t ca cc thit b.

2. V s :

Hiu r s ni dy chnh, s in t dng ca trm v s hiu tn cc thit b. Hiu v nm vng bn v nh th ca trm.

3. V ni quy, quy trnh - quy phm:

- Nm v hiu r cc Quy trnh vn hnh v bo dng cc trang thit b trong trm, h thng bo v, h thng thng tin lin lc, h thng t ng ha trong trm ...

- Chp hnh nghim chnh cc quy trnh - quy phm thit b do B, Tng Cng ty, Cng ty, X nghip ban hnh v ang c hiu lc.

- S dng thnh tho cc trang thit b lm vic, bo h lao ng, phng chy cha chy trong trm.

1.3. Tt c CBCNV trc tip qun l vn hnh TBA cn phi bo m cc iu kin sau:

- Phi c kim tra sc khe v c sc khe lm vic, trong qu trnh cng tc phi c khm sc khe nh k mi nm 1 ln.

- c o to v kim tra t yu cu i vi tng v tr cng vic. i vi nhn vin trc chnh phi c kim tra v c quyt nh cng nhn chc danh ca Cng ty.

- c t chc hc tp cc quy phm, quy trnh vn hnh, quy trnh k thut an ton v nh k kim tra kin thc.

+ 6 thng mt ln i vi cc quy trnh vn hnh.

+ 3 thng mt ln i vi quy trnh k thut an ton.

1.4. Nghim cm dn ngi l mt, ngi khng c nhim v vo trm. i vi nhng ngi vo tham quan, thc tp phi c giy gii thiu ca Lnh o Cng ty.

1.5. Tt c cc CBCNV trc tip qun l vn hnh ti TBA phi c trch nhim lu gi, bo qun ti liu k thut, quy trnh vn hnh, cc h s s sch biu mu lin quan n cng tc qun l vn hnh ca trm. Tuyt i khng cho mn cc ti liu, quy trnh, s sch biu mu nu trn ra khi trm khi cha c kin ca Trm trng. 2. Nhim v chung ca nhn vin vn hnh:

2.1. Nhn vin vn hnh trm bin p bao gm trc chnh v trc ph l ngi trc tip theo di, kim tra thit b, bo m thit b lun lm vic an ton v tin cy. Trc tip thao tc vn hnh v x l s c theo lnh ch huy iu cp trn (theo phn cp), thc hin ng cc iu quy nh trong quy trnh v bo co cho Lnh o n v v cc cp iu bit nhng thng tin cn thit trong ca trc ca mnh. 2.2. Nhn vin vn hnh c nhim v thi hnh chnh xc, khng chm tr v khng bn ci lnh ch huy iu ca nhn vin vn hnh cp trn, tr nhng lnh nguy hi n ngi hoc thit b th c php cha thc hin.

Nu khng c l do chnh ng v an ton m tr hon thc hin lnh ch huy iu ca nhn vin vn hnh cp trn th nhn vin vn hnh trm gy ra s tr hon phi chu hon ton trch nhim v hu qu xy ra.

2.3. Nhn vin vn hnh ti TBA 110kV lm vic theo ch ca, kp theo lch phn ca c Trm trng duyt.

- Mi ca trc phi c hai ngi tr ln.

- Lch i ca phi c treo phng iu khin.

- Khi c s thay i ca gia cc nhn vin vn hnh, phi c s ng ca Trm trng. Trm trng phi bo cho ngi lin quan t nht trc 24 gi v phi b tr ngi thay th c cng chc danh.

2.4. Trong thi gian trc ca, nhn vin vn hnh phi:

- Thc hin so v chnh gi thng nht vi cc cp iu .

- Nu r tn v chc danh trong mi lin h (A3 v B35). Ni dung lin h phi c ghi chp y vo s nht k vn hnh theo trnh t thi gian.

- Ghi chp mi mnh lnh khi thao tc vn hnh v x l s c ca ti cc cp iu v cc n v thao tc, x l s c.

- Khi xy ra s c, hin tng bt thng trong ca trc ca mnh, nhn vin vn hnh phi thc hin ng cc iu quy nh trong quy trnh x l s c HT Quc gia hin hnh v bo co nhng thng tin cn thit cho Lnh o n v v iu cp trn bit (theo phn cp).

- i vi s c nghim trng xy ra trong trm in th ngay sau khi x l xong s c nhn vin vn hnh phi c bn bo co nhanh gi v iu cp trn trc tip, Lnh o Chi nhnh, Lnh o Cng ty. 2.5. Nghim cm nhn vin vn hnh vi phm cc quy nh sau:

- Lm vic hai ca lin tc. Trong khi trc ca khng c ung ru, bia, s dng cc cht kch thch khc b nghim cm.

- B v tr trong lc trc ca hoc ht gi trc ca nhng cha c ngi n nhn ca. Khi khng c ngi n thay ca, nhn vin vn hnh phi bo co vi ngi xp lch, Lnh o trc tip bit b tr ngi khc thay th m bo thi gian ko di ca trc khng qu 04 gi.

- Cho ngi khng c nhim v vo v tr vn hnh khi cha c php ca Lnh o n v, Trm trng.

- Lm vic ring trong gi trc ca. 3. i vi nhn vin trc chnh: Trc chnh l ngi chu trch nhim chnh trong ca trc i vi mi thit b ca trm, trc tip ch huy thao tc vn hnh, x l s c theo mnh lnh thao tc ca cc cp iu cp trn v theo ng quy trnh vn hnh, quy trnh x l s c trm. Trc chnh phi c bc an ton thp nht l bc 4. 3.1.Nhim v ca trc chnh- Thng xuyn theo di v kim tra thit b thuc quyn qun l ca trm trong ca trc ca mnh, m bo vic vn hnh an ton, lin tc, khng xy ra cc s c ch quan, x l cc s c kp thi v ng quy trnh.

- Nm vng s , thng s k thut, ch vn hnh ca thit b trong trm.

- Chp hnh lnh ch huy iu ca cc cp iu (theo quyn iu khin).

- Trc tip ch huy thao tc vn hnh trm ng quy trnh vn hnh, quy trnh x l s c ca trm v theo s ch huy iu ca iu cp trn.

- Bo co y , chnh xc cc s liu, thng s vn hnh v tnh hnh vn hnh thit vi cc cp iu theo phn cp, Trm trng v Lnh o Cng ty.

3.2. Nhim v ca trc chnh khi thc hin cng tc ch huy thao tc cc thit b trong trm.- Trc tip nghe, nhn lnh ch huy iu ca cc cp iu (theo phn cp), vit phiu thao tc sau kim tra li ni dung thao tc theo s . Nu cha r phi hi li ngi ra lnh.

- Gii thch r ni dung cng vic, trnh t thao tc cho trc ph v cc bin php an ton khi thao tc.

- Khi thao tc, trc chnh c to tng lnh thao tc ghi trong phiu cho trc ph, trc ph phi nhc li lnh, nu ng mi cho php thao tc.

- Trong khi thao tc, nu thy nghi ng g v ng tc va lm th phi ngng ngay cng vic kim tra li ton b ri mi tip tc tin hnh.

- Nu thao tc sai hoc gy s c th trc chnh phi cho ngng ngay phiu thao tc v bo co cho iu vin cp trn ra lnh bit. Vic thc hin tip thao tc phi c tin hnh theo mnh lnh mi.

- Nhim v thao tc ch c coi l hon thnh khi thc hin xong trnh t cc thao tc, trc chnh c nhim v bo co kt qu cng vic cho ngi ra lnh ch huy trc tip bit v c ngi ra lnh chp nhn.

3.3. Trc chnh l ngi trc tip theo di thit b sau:

- Tt c cc thit b chnh trong trm nh: Cc MBA lc, MC, DCL, TU, TI trong trm.

- Cc trang b iu khin, bo v rle, thng tin lin lc v t ng ha trong trm.

3.4. Trc chnh l ngi trc tip qun l v ghi chp s sch vn hnh sau:

- S nht k vn hnh.

- S ghi mnh lnh ca iu .

- S theo di thit b r le bo v.

- S theo di vn hnh cc thit b chnh (MBA, MC, DCL,...).

3.5. Khi xy ra s c, hin tng bt thng trong ca trc ca mnh, trc chnh phi thc hin ng cc iu quy nh trong quy trnh vn hnh v quy trnh x l s c ca trm v bo co nhng thng tin cn thit cho Lnh o n v v iu cp trn bit (theo phn cp).

- Trng hp s c khn cp v khng th tr hon c (chy hoc c nguy c e do n tnh mng con ngi v an ton thit b) trm in cho php nhn vin trc chnh tin hnh thao tc theo quy trnh m khng phi xin php nhn vin vn hnh cp trn v phi chu trch nhim v thao tc x l s c ca mnh. Sau khi x l xong phi bo co ngay cho nhn vin vn hnh cp trn c quyn iu khin cc thit b ny.

3.6. Khi c n v bn ngoi vo trm cng tc, trc chnh c nhim v:

- Kim tra phiu cng tc, s lng v bc an ton ca nhn vin n v cng tc nh ghi trong phiu.

- Thc hin cc bin php m bo an ton trc khi tin hnh bn giao hin trng cho n v cng tc ng thi phi thc hin nhng vic sau:

+ Ch cho ton n v cng tc thy ni lm vic, chng minh l khng cn in cc phn c cch in v ni t.

+ Ch dn cho ton n v cng tc bit nhng phn cn mang in xung quanh ni lm vic, cc bin php an ton b sung trong qu trnh cng tc.

- Bn giao hin trng cho n v cng tc.

- Khi kt thc ton b cng vic, trc chnh phi tin hnh:

+ Kim tra vic thu dn, v sinh ch lm vic.

+ Nghim thu cht lng ton b cng vic m n v cng tc thc hin.

+ Kim tra khng cn ngi ti ni cng tc, tho ht tip a v cc bin php an ton do n v cng tc lm b sung.

+ Thu hi v kha phiu cng tc.

+ Bo cho cc cp iu cp trn vic kt thc cng tc v thc hin thao tc ng in cho thit b 4.i vi nhn vin trc ph:Trc ph l ngi trc tip thao tc cc thit b trong trm theo lnh thao tc ca trc chnh v di s gim st trc tip ca trc chnh. Phi hp thc hin cc bin php an ton cho cc i cng tc, ghi chp nh k cc thng s vn hnh v v sinh cng nghip trc khi giao ca.

Trc ph phi c bc an ton thp nht l bc 3.

4.1. Nhim v ca trc ph: - Thng xuyn theo di v kim tra thit b trm trong ca trc ca mnh, m bo thit b vn hnh an ton, lin tc, pht hin v bo trc chnh x l kp thi, khng xy ra cc s c ch quan.

- Nm vng s , thng s k thut, ch vn hnh ca thit b trong trm.

- Chp hnh lnh ch huy thao tc ca trc chnh v ch c thao tc di s gim st trc tip ca trc chnh.

- Khi tin hnh thao tc, phi thc hin cc yu cu sau:

+ m bo y cc trang b an ton, bo h lao ng theo ng quy nh trong quy trnh k thut an ton in nh: gng tay, ng cch in, m, qun o bo h v dng c thao tc...

+ Phi hiu r mc ch, ni dung cng vic v trnh t thao tc thit b, nu khng hiu hoc nghi ng phi yu cu trc chnh ch r, gii thch k trc khi thao tc.

+ Kim tra, xc nh chnh xc i tng cn thao tc theo ng yu cu lnh thao tc ca trc chnh.

+ Khi trc chnh c lnh thao tc, phi nhc li lnh, nu trc chnh xc nhn ng lnh mi c thao tc.

+ Vic thao tc thit b phi dt khot, nu thy nghi ng lnh thao tc khng ng theo quy trnh th yu cu trc chnh kim tra li lnh thao tc v ch thc hin khi tin hnh kim tra chnh xc ni dung v trnh t thao tc theo s vn hnh hin ti.

+ Trng hp thao tc c nguy c e da n tnh mng con ngi v thit b th c quyn t chi thao tc vi trc chnh v bo co vi i Trng, Lnh o X nghip v phi chu trch nhim v vic t chi thao tc ca mnh.

4.2. Trc ph chu trch nhim theo di vn hnh cc thit b sau:

- My bin p t dng, h thng in t dng ton trm.

+ Cc ng h o m.

+ H thng sc, np c quy ca trm.

+ Thit b PCCC, cc dng c thit b thao tc, sa cha.

- Ngoi ra, trc ph cn chu trch nhim theo di vn hnh cc thit b khc trong trm theo s phn cng c th ca Trng trm.

4.3. Trc ph l ngi trc tip qun l v ghi chp s sch vn hnh sau:

- S ghi thng s vn hnh.

+ S theo di vn hnh h thng c quy, t sc.

+ S ghi ch s cng t, sn lng nhn, giao ca trm.

4.4. Khi c n v bn ngoi vo trm cng tc,trc ph c nhim v: - Thc hin cc bin php m bo an ton trc khi tin hnh bn giao hin trng cho n v cng tc ng thi phi thc hin nhng vic sau:

+ Ch cho ton n v cng tc thy ni lm vic, chng minh l khng cn in cc phn c cch in v ni t.

+ Ch dn cho ton n v cng tc bit nhng phn cn mang in xung quanh ni lm vic, cc bin php an ton b sung trong qu trnh cng tc.

- Bn giao hin trng cho n v cng tc.

- Khi kt thc ton b cng vic, trc ph phi hp vi trc chnh tin hnh:

+ Kim tra vic thu dn, v sinh ch lm vic.

+ Nghim thu cht lng ton b cng vic m n v cng tc thc hin.

+ Kim tra khng cn ngi ti ni cng tc, tho ht tip a v cc bin php an ton do n v cng tc lm b sung.

CHNG IIITM HIU CC THIT B TRONG TRMI. MY BIN P: H thng my bin p lc gm c 2 my bin p : + MBA T1 - 25MVA ( 115/38,5/24kV ) do Nh my ch to bin th ng Anh sn xut nm 2002. C chc nng h p t 110kV xung 22kV v 35kV.

+ MBA T2 25 MVA ( 115 /38,5/ 24 kV ) do Nh my ch to bin th ng Anh sn xut. C chc nng h p t 110kV xung 35kV v 22kV.

1. Thng s k thut: a.Thng s k thut my bin p T1 25MVA - 115/38,5/24kV:- Loi MBA: Ba pha, ba cun dy, ngm trong du, lm vic ngoi tri.

- Nh sn xut: ng Anh.

- Tn s:

50Hz.

- in p nh mc:

+ Cao p:

115 ( 9 x 1,78% kV (iu p di ti)

+ Trung p:38,5 (2 x 2,5% kV (iu p khng ti).

+ H p:

24kV

- Kiu lm mt: ONAN/ONAF (Lm mt t nhin / Qut gi cng bc).

- Cng sut nh mc: 25/25/25MVA (ONAF)

20/20/20MVA (ONAN)

- T u dy:

YNdyn - 11-12.- Phng thc ni t ca h thng:

+ Cao p:

Ni t trc tip.

+ Trung p:

Cch ly.

+ H p:

Ni t trc tip.- Mc cch in:

u rain p

hot ng

cc i

(kV)in p th

nghim tn s

cng nghip (kV)in p chu ng xung st

(Gi tr nh) kV)

+ Pha cao p 123230550

+ Trung tnh cao p72,5140350

+ Trung p38,570170

+ H p2350125

+ Trung tnh h p2350125

- Kh nng chu qu ti ca MBA: Theo tiu chun IEC -354 (1991) v Quy trnh vn hnh v sa cha MBA ca Tng Cng ty ban hnh km theo quyt nh s 623VN/KTN ngy 23/05/1997.

- Gii hn tng nhit :

+ Gii hn tng nhit lp du trn cng:550C.

+ Gii hn tng nhit cun dy :

600C.

- Tn hao khng ti:

P0 = 15,9 kW; I0 = 0,2%

- Tn hao c ti: ( nc phn p chnh, nhit cun dy l 750C).

- Pk115-38,5= 109,539 kW.

- Pk115-24= 107,773 kW.

- Pk38,5-24= 94,370 kW.

- in p ngn mch: (Ti nc 10 khi nhit cun dy l 750C).

- Uk115-38,5= 11,46%.

- Uk115-24= 17,5%

- Uk38,5- 24= 6,0%

- in p v dng in cc nc iu chnh in p:Cun dyNc phn pin p (kV)Dng in (A)Nc phn pin p (kV)Dng in (A)

Cao p1133,423108,211112,953127,8

2131,386109,812110,906130,1

3129,329111,613108,859132,6

4127,282113,414106,812135,1

5125,235115,215104,765137,8

6123,188117,216102,718140,5

7121,141119,117100,671143,4

8119,094121,21898,624146,3

9117,047123,31996,577149,5

10115,000125,5

Trung p140,425357,1437,537384,5

239,462365,8536,575394,6

338,500374,9

H p124,00601,4

b.Thng s k thut ca my bin p T2 25MVA- 115/38,5/24kV

- Loi MBA: Ba pha, ba cun dy, ngm trong du, lm vic ngoi tri.

- Nh sn xut: ng Anh.

- Tn s:

50Hz.

- in p nh mc:

+ Cao p:

115 ( 9 x 1,78% kV (iu p di ti)

+ Trung p:

38,5 (2 x 2,5% kV (iu p khng ti).

+ H p:

24kV

- Kiu lm mt: ONAN/ONAF (Lm mt t nhin / Qut gi cng bc).

- Cng sut nh mc: 25/16,75/25MVA (ONAF)

15/15/15MVA (ONAN)

- T u dy:

YNdyn - 11-12.

- Phng thc ni t ca h thng:

+ Cao p:

Ni t trc tip.

+ Trung p:

Cch ly.

+ H p:

Ni t trc tip.

-Mc cch in:u rain p

hot ng

cc i

(kV)in p th

nghim tn s

cng nghip (kV)in p chu ng xung st

(Gi tr nh) (kV)

+ Pha cao p123230550

+ Trung tnh cao p72,5140-

+ Trung p40,570170

+ H p2350125

+ Trung tnh h p2350-

- Kh nng chu qu ti ca MBA: Theo tiu chun IEC -354 (1991) v Quy trnh vn hnh v sa cha MBA ca Tng Cng ty ban hnh km theo quyt nh s 623VN/KTN ngy 23/05/1997.

- Gii hn tng nhit :

+ Gii hn tng nhit lp du trn cng: 550C.

+ Gii hn tng nhit cun dy :

600C.

- Tn hao khng ti: P0 = 24 kW; I0 = 0,33%

- Tn hao c ti: ( nc phn p chnh, nhit cun dy l 750C).

- Pk115-38,5= 75,56 kW.

- Pk115-24= 139,434 kW.

- Pk38,5-24= 52,816 kW.

- in p ngn mch: (Ti nc 10 khi nhit cun dy l 750C).

- Uk115-38,5= 17,44%.

- Uk115-24= 10,27%

- Uk38,5- 24= 6,07%

- in p v dng in cc nc iu chnh in p:Cun dyNc phn pin p (kV)Dng in (A)Nc phn pin p (kV)Dng in (A)

Cao p1133,320108,411112,965127,9

2132,284110,112110,929130,3

3129,249111,813108,894132,7

4127,213113,614106,858135,2

5125,178115,415104,823137,9

6123,142117,416102,787140,6

7121,107119,317100,752143,4

8119,071121,41898,716146,4

9117,036123,51996,681149,5

10115,000125,7

Trung p140,425236,8437,538255,0

239,463242,5536,575261,7

338,500248,6

H p124,00602,1

2. B iu p: a.i vi b iu p my bin p T1 B iu p di ti bao gm cc phn chnh sau: Cng tc chuyn mch, b chn u phn p v c cu truyn ng. T hp cng tc chuyn mch c t trong mt thng du ring (khng chung vi du trong thng du chnh ca my bin p) v ni thng vi bnh du ph ca n.

Hnh 1 : S u dy b OLTCHnh 2 : MBA v b OLTC chn khng loi VV

B OLTC loi VVIII250Y-76-4019W ca hng MR (Cng ho lin bang c) sn xut l b iu p dng thit b i ni hn ch dng in bng in tr i xng, b cng tc K (cng tc chuyn mch) loi chn khng v lp t pha trung tnh 110kV ca MBA theo kiu chn nc c dao o cc (xem hnh 2 v 3). B OLTC gm 19 np vi mc iu chnh 1,78% mi nc, in p tng ti a nc s 1, in p gim ti thiu nc 19, nc s 10 mang in p nh mc (T nc 1 n nc 9 dao la chn O s ng vo u dng (+) ca b iu p, t nc 11 n nc 19 dao la chn O s ng vo u m (-) ca b iu p).

Cu to chnh ca b iu p di ti bng in tr gm c: in tr hn ch dng in v cc tip im cng tct. in tr c dng trong mch hn ch dng in ngn mch v tr trung gian, cn v tr lm vic n c mc sun hay h mch. iu ny cho php tnh ton in tr theo ti trong thi gian vi giy v bo m vic thc hin bng c cu tc ng nhanh nh truyn ng l xo tc ng ng m tip im cng tc t.

Trong qu trnh b iu p di ti hat ng, s pht sinh h quang ti cc u cc Cng tc K (contactor); trnh nhim bn du cch in trong my bin p, b Cng tc K c t trong mt ngn ring bit, lp bn ngoi bnh du chnh MBA v cch ly vi ton b cc phn cn li ca my bin p. B phn chn nc b tr ngay bn ngoi ngn Cng tc K (xem hnh 1 v 2), bao gm cc dao la chn v mt dao o cc c t chung trong thng du chnh ca my bin p.

B OLTC c iu khin v kim sot nh thit b t ng iu chnh kiu KVGC ca ALSTOM c t ti t iu khin t xa trong phng iu khin, t ng thay i nc phn p iu chnh in p ph hp mi loi c tnh ph ti.

Thao tc iu khin tng/gim b iu p di ti c thc hin bng cc cch thc sau:

- T ng thng qua thit b t ng iu chnh in p (B iu chnh kiu KVGC ca ALSTOM c t ti t iu khin t xa trong phng iu khin).

- Bng in t kha (RAISE/LOWER) iu khin t xa trong phng iu khin.

- Bng in t kha (RAISE/LOWER) iu khin ti ch (ti t iu khin OLTC gn bn hng MBA).

- Bng cn quay tay (ti t iu khin OLTC).

Thao tc iu p di ti bng tay ti ch (cn thao tc) c thc hin trong kim tra hiu chnh v trong trng hp MBA khng mang in.

Ch c tin hnh thao tc iu p di ti bng tay ti ch c in khi:

- Mch iu khin b s c khng th thao tc ti phng iu khin.

- Ct p t mt cp ngun cho ng c ca c cu truyn ng.

- Kim tra bng mt, chc chn b truyn ng khng b kt c kh hay c cc li c kh khc.

- c s ng ca iu vin A3. b.i vi b iu p ca my bin p T2 B iu p di ti bao gm cc phn chnh sau: Cng tc chuyn mch, b chn u phn p v c cu truyn ng. T hp cng tc chuyn mch c t trong mt thng du ring (khng chung vi du trong thng du chnh ca my bin p) v ni thng vi bnh du ph ca n.

Hnh 3 : S u dy b OLTC

Hnh 4 : MBA v b OLTC chn khng loi VV

B OLTC loi VIII200Y-76-4019W ca hng MR (Cng ho lin bang c) sn xut l b iu p dng thit b i ni hn ch dng in bng in tr i xng, b cng tc K (cng tc chuyn mch) loi du v lp t pha trung tnh 110kV ca MBA theo kiu chn nc c dao o cc (xem hnh3 v 4). B OLTC gm 19 np vi mc iu chnh 1,78% mi nc, in p tng ti a nc s 1, in p gim ti thiu nc 19, nc s 10 mang in p nh mc (T nc 1 n nc 9 dao la chn O s ng vo u dng (+) ca b iu p, t nc 11 n nc 19 dao la chn O s ng vo u m (-) ca b iu p).

Cu to chnh ca b iu p di ti bng in tr gm c: in tr hn ch dng in (02 in tr cho mt pha) v cc tip im cngtct. in tr c dng trong mch hn ch dng in v tr trung gian, cn v tr lm vic n c mc sun hay h mch. iu ny cho php tnh ton in tr theo ti trong thi gian vi giy v bo m vic thc hin bng c cu tc ng nhanh nh truyn ng l xo tc ng ng m tip im cngtct.

Trong qu trnh b iu p di ti hat ng, s pht sinh h quang ti cc u cc Cng tc K (contactor), trnh nhim bn du cch in trong my bin p, b Cng tc K c t trong mt ngn ring bit, cch ly vi ton b cc phn cn li ca my bin p. B phn chn nc b tr ngay bn ngoi ngn Cng tc K (xem hnh 3, 4), bao gm cc dao la chn v mt dao o cc c t chung trong thng du chnh ca my bin p.

B OLTC c iu khin v kim sot nh thit b t ng iu chnh kiu SPAU 314C1 c t ti t iu khin t xa trong phng iu khin, t ng thay i nc phn p iu chnh in p ph hp mi loi c tnh ph ti.

Trc khi a thit b iu p di ti vo vn hnh, cn phi kim tra cc ni dung sau:

- Thc hin mt s ln thao tc bng tay b iu p kim tra chc nng c kh ca b chuyn nc. Trong qu trnh thao tc, kim tra hin th v tr trn b truyn ng m t v trn b chuyn nc (qua knh kim tra) phi ging nhau ti tt c cc v tr.

- Kim tra chuyn mch t ng ca b chuyn nc phn p. B chuyn nc phn p lm vic ng khi chuyn mch t ng khng hot ng c hai v tr u v cui (nc phn p s 1 v nc s 19).

Thao tc iu khin tng/gim b iu p di ti c thc hin bng cc cch thc sau:

- T ng thng qua thit b t ng iu chnh in p t ti t iu khin t xa trong phng iu khin.

- Bng in t kha (RAISE/LOWER) iu khin t xa trong phng iu khin.

- Bng in t kha (RAISE/LOWER) iu khin ti ch (ti t iu khin OLTC gn bn hng MBA).

- Bng cn quay tay (ti t iu khin OLTC).

Thao tc iu p di ti bng tay ti ch (cn thao tc) c thc hin trong kim tra hiu chnh v trong trng hp MBA khng mang in.

Ch c tin hnh thao tc iu p di ti bng tay ti ch c in khi:

- Mch iu khin b s c khng th thao tc ti phng iu khin.

- Ct p t mt cp ngun cho ng c ca c cu truyn ng.

- Kim tra bng mt, chc chn b truyn ng khng b kt c kh hay c cc li c kh khc.

- c s ng ca iu vin A3. c.Nguyn l vn hnh b OLTC loi VVIII 250Y

Qu trnh lm vic chuyn mch 1 nc phn p ca b iu p di ti tc ng nhanh dng in tr hn ch dng t mt nc phn p n (v d nc 1) v mt nc phn p mi n+1(v d nc 2) ch ra trong hnh 7.

1. v tr lm vic ca nc phn p n, dao la chn MTS, TTS ang tip vo nc n, cc tip im cng tc t MSV, TTV u ng, xem hnh 7.1. Dng in ph ti chy theo mch t u nc phn p n cng tc la chn MTS cng tc t MSV cng tc trt STC. Mt phn nh dng in khp mch qua cng tc la chn TTS cng tc t TSV cng tc trt STC.

2. Khi chuyn mch t nc n sang nc n+1, qu trnh chuyn mch bt u bng vic dao la chn TTS tch khi nc c n (hnh 7.2) (lc ny cng tc t TTV vn ng), sau cng tc t TTV ct (hnh 7.3). Lc ny dng in ph ti vn chy theo mch c t u nc phn p n cng tc la chn MTS cng tc t MSV cng tc trt STC.

3. Sau khi dao la chn TTS tip vo nc n +1 (hnh 7.4), cng tc t TTV ng li (hnh 7.5). Lc ny dng in ph ti vn khp mch t u nc phn p n cng tc la chn MTS cng tc t MSV cng tc trt STC. ng thi c mt dng in qun Ic chy vng trong mch nc phn p n cng tc la chn MTS cng tc t MSV cng tc trt STC cng tc t TSV cng tc la chn TTS nc phn p n+1 nc phn p n.

4. Tip n cng tc t MSV ct (hnh 7.6), dng in ph ti khp mch t nc phn p n+1 qua cng tc la chn TTS cng tc t TSV cng tc trt STC.

MTSCng tc la chn nc phn p, phn chnh

MSVCng tc chuyn i chnh (bung ct chn khng), phn chnh

TTSCng tc la chn nc phn p, phn chuyn i tm thi

TTVCng tc chuyn i (bung ct chn khng), phn chuyn i tm thi

STCCng tc trt

Rin tr hn ch

IcDng in vng

Hnh 7 : S m phng qu trnh chuyn nc phn p ca b OLTC

5. Sau cng tc la chn MTS tch ri khi nc phn p n (hnh 7.7) v tip vo nc phn p n+1 (hnh 7.8). Lc ny cng tc t MSV vn ct, dng in ph ti vn khp t nc phn p n+1 qua cng tc la chn TTS cng tc t TSV cng tc trt STC.

6. Cui cng cng tc t MSV ng li (hnh 7.9), dng n ph ti ch yu khp mch qua nc phn p n +1 cng tc la chn MTS cng tc t MSV cng tc trt STC. Qu trnh chuyn nc kt thc.

3. S lc v h thng lm mt mt bin p.a.H thng lm mt my bin p T1 -B tn nhit:+ Phng php lm mt ca MBA l s lu thng du, gi t nhin (ONAN) v lm mt cng bc bng qut gi (ONAF). Thit b lm mt l h thng tn nhit kiu dn l c th tho ri thun tin cho vic vn chuyn my. Vic lm mt ca b tn nhit theo phng thc i lu v bc x nhit.

+ Mi b tn nhit c thit k ch to c th lm sch bng tay v bo dng b mt ti hin trng.

+ Mi ng ni vi cnh tn nhit u c mt van cnh bm ph hp vi tiu chun, c kh nng kho v tr ng m v k hiu chc chn.

+ Ti mi hp cnh tn nhit c nt x du y v x kh pha bn trn, cho php tho du ca cnh tn nhit m khng cn x du t thng my. -H thng qut lm mt:+ H thng qut mt hot ng theo 2 nhm : mt na v ton b v theo hai ch bng tay v t ng. ch bng tay c th khi ng bng nt bm ti t iu khin ti ch hoc t iu khin t xa. ch t ng h thng qut t ng lm vic theo nhit lp du trn cng v nhit cun dy.

+ H thng tn hiu tc ng khi ng qut theo nhit lp du trn cng

Khi ng qut: 600C.

Dng qut

: 500C.

+ H thng tn hiu tc ng khi ng qut theo nhit cun dy

Khi ng qut: 650C.

Dng qut

: 550C.

+ S lng qut mt gm 6 ci; loi 0,4kW-910v/ph dng in p 3 pha 220/380V-50Hz. Chiu quay cnh qut c quy nh v ghi r trn thn qut. cc qut u c bo v v ng ct bng ptmt.

+ Vic khi ng v dng qut tt c cc ch bng tay v t ng u thc hin c ti MBA v trong phng iu khin.

+ Cc tn hiu ch th hot ng, s c ca h thng lm mt nh sau:

Cc qut hot ng.

Cc qut ngng.

H thng lm mt ang ch hot ng bng tay.

H thng lm mt ang ch hot ng t ng.

S c qut.

Ngun cung cp bnh thng.

b.H thng lm mt my bin p T2

-B tn nhit:

+ Phng php lm mt ca MBA l s lu thng du, gi t nhin (ONAN) v lm mt cng bc bng qut gi (ONAF). Thit b lm mt l h thng tn nhit kiu dn l c th tho ri thun tin cho vic vn chuyn my. Vic lm mt ca b tn nhit theo phng thc i lu v bc x nhit.

+ Mi b tn nhit c thit k ch to c th lm sch bng tay v bo dng b mt ti hin trng.

+ Mi ng ni vi cnh tn nhit u c mt van cnh bm ph hp vi tiu chun, c kh nng kho v tr ng m v k hiu chc chn.

+ Ti mi hp cnh tn nhit c nt x du y v x kh pha bn trn, cho php tho du ca cnh tn nhit m khng cn x du t thng my.

-H thng qut lm mt:

+ H thng qut mt hot ng theo 1 nhm v theo hai ch bng tay v t ng. ch bng tay c th khi ng bng nt bm ti t iu khin ti ch hoc t iu khin t xa. ch t ng h thng qut t ng lm vic theo nhit lp du trn cng v nhit cun dy.

+ H thng tn hiu tc ng khi ng qut theo nhit lp du trn cng

Khi ng qut: 600C.

Dng qut

: 550C.

+ H thng tn hiu tc ng khi ng qut theo nhit cun dy

Khi ng qut: 750C.

Dng qut

: 650C.

+ S lng qut mt gm 8 ci; loi 0,55kW-920v/ph dng in p 3 pha 220/380V-50Hz. Chiu quay cnh qut c quy nh v ghi r trn thn qut. cc qut u c bo v v ng ct bng ptmt.

+ Vic khi ng v dng qut tt c cc ch bng tay v t ng u thc hin c ti MBA v trong phng iu khin.

Cc tn hiu ch th hot ng, s c ca h thng lm mt nh sau :

Cc qut hot ng.

Cc qut ngng.

H thng lm mt ang ch hot ng bng tay.

H thng lm mt ang ch hot ng t ng.

S c qut.

Ngun cung cp bnh thng.

4. Phng thc vn hnh MBA T1 v T2 trm 110 kv E2 ng Hi.

a. Vn hnh song song 02 MBA

- T1 v T2 vn hnh song song cp cho li 22kV, T1 hoc T2 cp in cho pha 35kV.

- T1 v T2 vn hnh song song cp cho li 35kV, T1 hoc T2 cp in cho pha 22kV.

- T1 v T2 vn hnh song song cp cho li 22kV v 35kV.

- Cho php chuyn ti 22kV hoc 35kV t MBA T1 sang MBA T2 hoc ngc li vi iu kin in p pha cn chuyn i ca T1 v T2 bng nhau.

Lu : Do in p ngn mch Uk% ca 2 MBA T1 v T2 khc nhau do hn ch vn hnh song song 2 MBA, c bit l trng hp T1 v T2 vn hnh song song cp cho li 22kV v 35kV.

b. Vn hnh c lp

- T1 cp in cho li 22kV, T2 cp in cho li 35kV hoc ngc li.

- T1 cp in cho li 22kV v 35kV, T2 cp in cho li 22kV hoc ngc li.

- T1 cp in cho li 35kV v 22kV, T2 d phng hoc ngc li.

* Lu :

a. Vic a MBA T1 v T2 vo vn hnh song song c tin hnh khi cc iu kin sau:

- MBA T1 v T2 c nhn in t mt ngun.

- MBA T1 v T2 phi hon ton ng v pha vi nhau.

- Nc phn p ca T1 v T2 phi trng nhau hoc lch nhau khng qu 01 nc.

b. i vi MBA sau khi lp t xong hoc sau khi tin hnh nhng cngvic c th lm thay i v tr pha th trc khi a vo vn hnh tr li phi th ng v pha vi my bin p cn li s vn hnh song song vi n.

c. Khi MBA T1 v T2 vn hnh song song

- Vic iu chnh in p c th c tin hnh bng tay hoc t ng nhng phi m bo nc phn p ca T1 v T2 trng nhau.

- Khi iu chnh in p c tin hnh t ng phi thng xuyn theo di nc phn p ca T1 v T25. Thao tc MBA:

-Trnh t thao tc tch MBA ra sa cha nh sau:

1. Kim tra tro lu cng sut, huy ng ngun hoc thay i kt li thch hp trnh qu ti cc MBA khc hoc cc ng dy lin quan.

2. Chuyn ngun t dung nu ngun t dung ly qua MBA

3. Kho ch iu chnh in p di ti ( nu c)

4. Ct MC pha h p, trung p, cao p MBA theo trnh t c quy nh(ct ph ti trc, ct ngun sau).

5. Kim tra MBA khng cn in p

6. Ct cc DCL c lien quan cn thit pha h p, trung p, cao p MBA theo trnh t c quy nh.

7. Ct cc ATM cc my bin in p ca cc MBA (nu c).

8. ng tip a c nh pha h p, trung p, cao p MBA.

9. n v qun l vn hnh lm cc bin php an ton, treo bin bo an ton theo Quy trnh K thut an ton in hin hnh.

10. Bn giao MBA cho n v cng tc, ng thi nhc nh, l n v cng tc v cng tc an ton.

- Trnh t tao tc a MBA vo vn hnh sau sa cha nh sau:

1. n v qun l bn giao MBA kt thc cng tc, ngi v phng tin sa cha rt ht, tho cc tip a di ng, MBA tiu chun vn hnh v sn sang ng in.

2.Ct ht cc tip a cc pha ca MBA.

3. ng ATM ca cc my bin in p ca cc MBA.

4.Kim tra h thng bo v, h thng lm mt MBA a vo vn hnh.

5. t nc phn p v tr thch hp, trnh qu in p MBA khi ng in.

6. ng cc DCL c lin quan pha h p, trung p, cao p MBA.

7. ng MC pha ngun phng in MBA, sau ln lt ng cc MC cc pha cn li.

8. Chuyn i ngun t dng (nu cn).

9. Sau khi a MBA vo vn hnh, kim tra tnh trng vn hnh ca MBA. Tu theo ch vn hnh c th a ch t ng iu chnh nc phn p vo lm vic.

Ch : khi ng hoc ct khng ti MBA c trung tnh cch in khng hon ton( c DCL ni t trung tnh), cn lu trc phi ni t trung tnh, khng ph thuc c hay khng bo v chng st ti trung tnh. Sau khi ng in MBA, cn a trung tnh ca n tr l lm vic ng vi ch vn hnh bnh thng.6.Cc loi bo v cho MBA T1 v T2 a.Cc bo v cho MBA T1:Cm MBA T1 trm bin p 110kV ng Hi c trang b cc loi bo v sau y:

Cc bo v bo chung (s dn n trip cc MC lin quan).

- 87T: Bo v so lch MBA.

50REF-110: Bo v chm t c gii hn cun dy 110kV mba.

50REF-22: Bo v chm t c gii hn cun dy 22kV mba.

96-2: Bo v hi cp 2.

96P: Bo v dng du cp b OLTC.

Bo v p lc du trong MBA tng cao.

63Q - tc ng rle p sut.

63S - tc ng van an ton (van phng n) (Safety).

63-OLTC: Bo v p lc du trong b OLTC tng cao.

26Q-2: Bo v nhit du tng cao cp 2 (nhit lp du trn cng > 95OC).

26W-2: Bo v nhit cun dy MBA tng cao cp 2 (>1050C)

50/51, 50/51N-110: Bo v qu dng, qu dng chm t pha 110kV MBA

50/51-35: Bo v qu dng pha 35kV MBA

50/51, 50/51N-22: Bo v qu dng, qu dng chm t pha 22kV MBA.

50BF-131: Bo v chng h hng MC 131 bo v ny i trip cc MC lin quan khi vic trip MC 131 khng thnh cng.

50BF-331: Bo v chng h hng MC 331 bo v ny i trip cc MC lin quan khi vic trip MC 331 khng thnh cng.

50BF-431: Bo v chng h hng MC 431, bo v ny i trip cc MC lin quan khi vic trip MC 431 khng thnh cng.

Cc bo v bo ci: (Ch bo ng, khng trip cc MC)

96-1: Bo v hi cp 1.

26Q-1: Bo v nhit du tng cao cp 1 (>90 OC) .

26W-1: Bo v nhit cun dy MBA tng cao cp 1 (>100 OC).

71Q-1: Bo v mc du MBA (ngn ln) gim thp.

71Q-2: Bo v mc du b OLTC (ngn nh) gim thp.

27/59-22: Bo v km p/qu p TC 22kV.

27/59-35: Bo v km p/qu p TC 35kV.

49-110 : Bo v qu ti pha 110kV MBA.

- 74.1-131, 74.2-131: S c mch trip 1, 2 MC 13174-331: S c mch trip MC 331

74-431: S c mch trip MC 431

Bo v np ti l so MC 131, 331, 431

SF6-1/131: p sut kh SF6 gim thp cp 1:

SF6-2/131: p sut kh SF6 gim thp cp 2, bo v ny kho mch iu khin MC 131.

S c mt ngun AC, DC ti cc t, s c mt ngun p;

S c li rle.

Ngoi ra cn mt s bo v khc ch bo n

Cc bo v chnh (bo v h hng bn trong MBA) gm:

87T, 50REF-110, 50REF-22, 96-2, 96P, 63Q, 63S, 63-OLTC.

Lu : Khi cc bo v bo chung ti iu 32 tc ng, cc bo v ny a tn hiu n rle trip v lock out 86 tng ng trip v kho cun ng MC. Cn gii tr s c trc khi ng li MC.

b.Cc bo v cho MBA T2

Cm MBA T2 trm bin p 110kV ng Hi E2 c trang b cc loi bo v sau y:

Cc bo v bo chung (s dn n trip cc MC lin quan).

87T: Bo v so lch MBA.

50REF-110: Bo v chm t c gii hn cun dy 110kV mba.

96-2: Bo v hi cp 2.

96P: Bo v dng du cp b OLTC.

Bo v p lc du trong MBA tng cao.

26Q-2: Bo v nhit du tng cao cp 2 (nhit lp du trn cng > 95OC).

26W-2: Bo v nhit cun dy MBA tng cao cp 2 (>1150C).

50/51, 50/51N-110: Bo v qu dng, qu dng chm t pha 110kV MBA

50/51-35: Bo v qu dng pha 35kV MBA

50/51, 50/51N-22: Bo v qu dng, qu dng chm t pha 22kV MBA.

Cc bo v bo ci: (Ch bo ng, khng trip cc MC)

96-1: Bo v hi cp 1.

26Q-1: Bo v nhit du tng cao cp 1 (>85 OC).

26W-1: Bo v nhit cun dy MBA tng cao cp 1 (>105 OC)

71Q-1: Bo v mc du MBA (ngn ln) gim thp.

71Q-2: Bo v mc du b OLTC (ngn nh) gim thp.

27/59-22: Bo v km p/qu p TC 22kV.

27/59-35: Bo v km p/qu p TC 35kV.

49-110 : Bo v qu ti pha 110kV MBA.

74.1-132, 74.2-132 : S c mch trip 1, 2 MC 132.

74-332: S c mch trip MC 332.

74-432: S c mch trip MC 432.

Bo v np ti l so MC 132, 332, 432.

SF6-1/132: p sut kh SF6 gim thp cp 1:

SF6-2/132: p sut kh SF6 gim thp cp 2, bo v ny kho mch iu khin MC 132.

S c mt ngun AC, DC ti cc t, s c mt ngun p;

S c li rle.

Ngoi ra cn mt s bo v khc ch bo n

Cc bo v chnh (bo v h hng bn trong MBA) gm:

87T, 50REF-110, 96-2, 96P.II. PHN MY CT IN:1.My ct loi 3AP1FG - SIEMENS 1.1. Cc c im k thut: - My ct 3AP1FG - SIEMENS l loi my ct dng kh SF6 cch in v dp h quang. Ba pha ca my ct t trn mt gi . Tr cc my ct cha kh SF6 cch in v dp h quang theo nguyn l t thi. Mt ca kh SF6 trong bung c hin th bng ng h p lc.

- Mi pha ca my ct c mt bung dp h quang (bung ngt) ring bit nm pha trn, pha di l s cch in. to mi trng cho kh SF6 dp tt h quang p lc cao, bung dp h quang ca my ct SF6 c thit k tng cng kh nng chu nhit v chn ng c kh, gim hao mn tip im do cc ha cht c hi sinh ra trong qu trnh dp h quang. Phn tc dng nm trong v s cha y kh m bo cch in gia cc cc ca my ct.

- Ba pha c iu khin chung bng mt c cu truyn ng bng l xo tch nng t trong t truyn ng c gn vi gi . Nng lng cn thao tc c tch nng trong l xo ng v l xo ct chung cho c 3 pha. T truyn ng c ni vi tr cc pha B qua mt c cu dn ng v ni vi cc tr pha khc qua cc cn lin kt.

-Sau mi ln ng, l xo ng t ng c tch nng cho ln ng tip theo bng mt ng c nn l xo. Thi gian tch nng nh hn 15s.

- Chu trnh ca my ct l: M - 0,3s - ng Ct - 3min - ng Ct.

- My ct c th bo tn hiu hoc t ng kha khi p lc kh SF6 b gim thp.

- My ct c tip im lin ng chng ng hoc ct khi p lc kh SF6 b gim thp.

- My ct c 2 cun ct c th lm vic c lp hoc song song.

- My ct c th thao tc t xa hoc ti ch ty theo vic chn ch REMOTE hoc LOCAL.

- My ct c trang b b sy t ti t truyn ng, c b cm bin nhit iu khin vic a b sy vo lm vic khi nhit mi trng nh hn 10oC.

- My ct c kt cu kn, cc tr np y kh nn c th dng mi kh hu, k c trong mi trng nhim bn nng v kh hu nhit i.

- Tt c cc chi tit ca 1 cc my ct u c lp rp, hiu chnh v th nghim xut xng sn sng cho vic lp t, sau np kh p lc 0,5bar, bo m cho cc chi tit trong cc my ct khng b nhim m trong qu trnh vn chuyn v bo qun trong kho. Do khng cn kim tra v x l cch in trc khi vn hnh nu p lc trong cc my ct khi m hm khng nh hn 0,3bar.

- My ct c th ng lp li cho c 3 pha. 1.2. Cc thng s k thut:TTThng sn vGi tr

1in p nh mckV123

2Tn s nh mcHz50

3Dng in nh mcA2000

4Dng ct ngn mch nh mckA40

5Thi gian chu ngn mchs3

6Kh nng ng - ct dng in dung ng dy trn khngkA31,5

7Kh nng ng - ct dng in dung ng cp ngmkA140

8Kh nng ng dng ngn mch kVpeak100

9Mc chu in p xoay chiu tng cao tn s cng nghip, 1minkVrms230

10Mc chu in p xung st (BIL)kVpeak550

11Khong cch phng in

- Pha tmm1250

- Qua cc u ccmm1200

- Pha pha mm1360

12Chiu di dng r b mt cch in

- n tmm3075

- Qua cc u ccmm3075

13Thi gian thao tc

- Tng thi gian thc hin lnh ng nh nhtms80

- Tng thi gian thc hin lnh ct nh nhtms80

- Thi gian ng ca my ctms57 6

- Thi gian ct ca my ctms31 3

- Thi gian ct nh mcms 50

- Thi gian ng - ctms30 10

- S ch to : MC 132 97/K35036414.TT`Thng sn vGi tr

16Trng lng kh SF6 ca my ctkg8,1

17p lc kh t = 200C

- p lc np nh mcbar6,0

- p lc bo mc 1bar5,2

- p lc kho mc 2bar5,0

- Thng s k thut c cu truyn ng:

TTThng sn vGi tr

1Kiu b truyn ngL xo tch nng

2in p nh mc cp cho ng c nn l xo

- Mt chiuVDC220(ang dng)

- Xoay chiuVAC220

3in p lm vic ca ng c85 n 110%Un

4Cng sut tiu thW