TNG C.TY IN LC VIT NAM -----------S: 623/VN/KTN

CNG HO X HI CH NGHA VIT NAM

c lp T do Hnh phc-------------------------

H Ni, ngy 23 thng 5 nm 1997

QUYT NH CA TNG CNG TY IN LC VIT NAM

-Cn c Ngh nh 14/CP ngy 27 thng 1 nm 1995 ca Chnh ph v vic thnh lp Tng Cng ty in lc Vit Nam v ban hnh iu l Tng Cng ty. -Cn c vo nhu cu cng tc qun l k thut ca Tng Cng ty. -Xt ngh ca ng Trng Ban KT ngun v Ban KT li in.QUYT NH

iu 1: Nay ban hnh km theo quyt nh ny Quy trnh vnn hnh v sa cha my bin p. iu 2: Quy trnh ny p dng cho cc Nh my in, cc Cng ty in lc, Truyn ti in v cc X nghip trc thuc Tng Cng ty. iu 3: Quy trnh ny c hiu lc t ngy ban hnh. Cc ng Gim c Nh my in, cc Cng ty, cc X nghip trc thuc v cc ng Trng Ban ca Tng Cng ty c trch nhim n c v kim tra vic thc hin ny.KT TNG GIM C TNG CNG TY IN LC VIT NAM PH TNG GIM C Bi Thc Khit ( k)

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QUI TRNHVN HNH V SA CHA MY BIN P(Ban hnh theo quyt nh s 623/VN/KTN ngy 23 thng 5 nm 1997 ca Tng Cng ty in lc Vit Nam)

Chng INHNG YU CU CHUNG V LP T MY BIN P iu 1: Quy trnh ny p dng cho tt c cc my bin p lc, bin p t ngu v cun in khng c du (sau y gi chung l my bin p) vi mi cng sut, t trong nh hay ngoi tri cc nh my in v trm bin p c cp in p n 500kV. y l quy trnh mu, tng c s cn c vo hng dn ca nh ch to kt hp vi quy trnh ny son thnh quy trnh c th. iu 2: My bin p phi c bo v r le v bo v qu in p theo ng quy trnh Bo v r le v t ng in v quy trnh Bo v qu in p. iu 3: V my bin p phi c ni t theo ng quy trnh Ni t cc thit b in. iu 4: Cc cun dy h p hoc trung p khng s dng n ca my bin p ba pha phi c u sao hoc u tam gic v bo v chng qu p. Bo v cun h p khng dng n b tr gia cc cun dy c cp in p cao hn, thc hin bng chng st van u vo u ra ca mi pha. Bo v cun dy trung p hoc h p khng dng n trong cc trng hp khc thc hin bng cch ni t im trung tnh hoc bng cch dng ci chng st u vo u ra ca mi pha. cc my bin p m trung tnh c mc cch in thp hn cc u vo, vic bo v im trung tnh c thc hin bng cch ni t trc tip hoc qua chng st van tu theo yu cu ca li. iu 5: My bin p cng sut t 100 kVA tr ln phi c Ampemt kim tra ph ti ca my. i vi nhng my bin p cng sut nh hn c th khng t Ampemt. iu 6: My bin p hai cun dy ch cn t Ampemt mt pha cao hn hoc h p, nu l my ba cun dy th mi pha u phi t Ampemt. iu 7: My bin p c trung tnh ni t trc tip vo dy trung tnh c dng in ph ti, hoc im trung tnh khng ni t nhng ph ti ba pha khng cn bng th c ba pha u phi t mpemt.2PDF created with FinePrint pdfFactory Pro trial version http://www.fineprint.com

Trn mt Ampemt phi c vch chia c ch s khi my bin p qu ti v ch s ng vi dng in nh mc phi k vch . iu 8: Vic t cc loi ng h o in khc (vn mt, ot mt, var- mt...) tu theo yu cu vn hnh. iu 9: My bin p du phi c nhit k kim tra nhit lp du trn cng bn trong my. My bin p np xp- tn phi c ng h p k- chn khng kim tra p lc trong v my v r le p lc tc ng khi p lc trong v my vt qu gi tr quy nh. Rt hn ch dng bin p loi ny v du Xp- tn rt c. iu 10: i vi my bin p t trong nh, ca phng t my phi lm bng vt liu khng chy, cnh ca phi m ra pha ngoi v phi c kho. iu 11: Cc l thng hi, l lun cp ra vo bung t my bin p... u phi c bo v chng cc loi ng vt (chim, chut, rn...) chui vo. iu 12: Trn v my bin p t ngoi tri hoc trn tng bung t my bin p trong nh phi ghi r s hiu ca nh my, ca trm, tn gi thng nht theo quy nh ca iu : cng sut, in p. Ngoi ca khu vc t my bin p phi treo bin Dng li in cao p, nguy him cht ngi. Trn v my bin p mt pha phi c k hiu mu sn ca pha tng ng. My bin p t ngoi tri phi sn mu sng bng sn khng pha ph gia kim loi, chu c tc dng ca kh quyn v tc dng ca du. iu 13: My bin p t trong nh phi c b tr th no nhng s pha cao p quay vo pha tng i din vi li ra hoc quay vo pha tng bn cnh. iu 14: Trong cc bung t my bin p khong cch t v my n tng v ca ra vo khng c nh hn nhng tr s quy nh trong bng di y (bng1). Bng 1: n tng n ca ra vo T 320 tr xung 0,3 0,6 Trn 320 n 1000 0,6 0,8 Trn 1000 0,6 1,0 Khong cch c tnh t phn nh ra nhiu nht ca my. iu 15: Khi t my bin p phi b tr ng phng n hoc van an ton sao cho khi s c khng phun vo u cp, vo thanh ci, vo my bi n p hoc thit b khc Cng sut my bin p (kVA) Khong cch tnh t v my bin p (m)

gn . Nu cn phi c tng hoc vch ngn. nh ng phng n phi c ni vi phn trn ca bnh du ph. iu 16: Phng t my bin p phi c thng gi t nhin m bo my bin p vn hnh vi ph ti nh mc bt k thi gian no trong nm. Nu my bin p c h thng lm mt cng bc th h thng ny phi c cp in t hai ngun v phi c b phn bo tn hiu s c hoc ng ngun d phng t ng. iu 17: Ti ni t my bin p c du phi c nhng trang b phng, cha chy theo ng quy trnh Phng, cha chy cho cc thit b in. iu 18: Bung t my bin p c du v trm bin p ngoi tri phi c h x du s c. Ring nhng my bin p t 320 kVA tr xung t ring r xa khu vc sn xut, xa khu vc nh v nhng my bin p t trong li in t 10kV tr xung th c th khng cn xy h x du s c, nhng phi c rnh hoc ng thot du. My bin p ngoi tri c cha 600kg du tr ln th di my bin p phi si vi b dy lp ti thiu 250mm v rng ra 1m xung quanh my. iu 19: Trang b chiu sng v cc cng tc n trong bung t my bin p phi b tr th no nh sng cn thit v bo m an ton cho ngi cng tc. iu 20: Phi bo m iu kin d dng, thun tin, an ton cho vic theo di mc du trong my, trong cc s c du, kim tra r le ga, ly mu du... Cc b phn b tr trn cao (t 3m tr ln) ca my bin p ang lm vic khi quan st phi c thang t c nh. Nhng dy dn trong mch bo v, o lng, tn hiu, t ng b tr trn my bin p c du phi l loi dy c cch in chu c du bin p. iu 21: My bin p cng sut t 4.000 kVA tr kn phi t trang b ti sinh du trong vn hnh (bnh lc hp th, xi phng nhit). Du trong bnh du ph ca my bin p phi c bo v trnh tip xc trc tip vi khng kh xung quanh. 0 Trn bnh du ph phi c ng ch mc du c nh du vi +5, +25 v +40 C hoc ng h bo mc du. My bin p c trang b b phn chuyn dng chng nhim m du phi c vn hnh cng vi s lm vic ca my bin p. Cc b phn k trn phi c vn hnh theo quy trnh ca nh ch to. Du trong cc s cch in c du phi c bo v chng xy ho v chng nhim m.

iu 22: Cc my bin p c trang b r le hi phi m bo ng dn du t my ln bnh du ph c nghing khng di 2 - 4%. Cc my bin p kiu h phi h tr cho mt my nghing v pha r le hi khng di 1 - 1,5%. Mt s my bin p loi mi c th khng cn p dng quy nh ny nu nh ch to my bin p cho php. iu 23: Nhng my bin p lp mi phi c xem xt rut my (bng cch rt v, rt rut, m ca thm...) trc khi a vo vn hnh, tr trng hp c s quy nh c bit ca nh ch to hoc my bin p kiu kn. iu 24: Mi my bin p phi c nhng ti liu k thut sau y mi c a vo vn hnh. a. L lch k thut ca nh ch to i km theo my. b. Cc bin bn th nghim, nghim thu, bn giao... c. S ghi chp nhng cng vic sa cha, ci tin, th nghim nh k thc hin trong qu trnh qun l. d. S nht k vn hnh ca my bin p (ph ti, in p, dng in, nc in p, nhit du v.v...) ti ch t my bin p hoc ch lm vic ca nhn vin trc ca. Chng II CC CH LM VIC CHO PHP CA MY BIN P iu 25: Trong iu kin lm mt quy nh my bin p c th vn hnh vi nhng tham s ghi trn nhn my. iu 26: My bin p du lm mt bng qut gi (QG) cho php ngng qut gi trong trng hp ph ti di nh mc v nhit lp du pha trn khng qu 0 45 C. 0 H thng qut gi phi c t ng ng khi nhit du t ti 55 C hoc khi ph ti t ti nh mc khng ph thuc vo nhit du. iu 27: ph ti nh mc nh ch to khng quy nh nhit du th nhit du lp trn khng c cao qa: 0 a. 75 C i vi my bin p lm mt kiu du tun hon cng bc- qut gi cng bc (KD). 0 b. 90 C i vi my bin p lm mt t nhin bng du (D) v i vi my bin p lm mt theo kiu (QD). 0 c. 70 C i vi nhit d du trc bnh lm mt du ca cc my bin p lm mt kiu du tun hon cng bc nc lm mt cng bc (ND). iu 28:

i vi my bin p c h thng lm mt cng bc cho php cc ch lm vic s c khi ngng tun hon nc hoc ngng qut gi. Thi gian lm vic cc ch ny xc nh nh sau: 1 . My bin p lm mt theo kiu QG khi tt c cc qut gi b ct do s c c php lm vic vi ph ti nh mc tu theo nhit khng kh xung quanh trong thi gian nh sau: Nhit khng kh xung o quanh C Thi gian cho php, gi 0 16 10 10 20 6 30 4

2. My bin p lm mt theo kiu KD v ND c php: a. Lm vic vi ph ti nh mc trong thi gian 10 pht hoc lm vic ch khng ti trong thi gian 30 pht k t khi ngng lm mt cng bc nhng vn duy tr tun hon du. Nu ht thi gian k trn nhit du lp 0 trn cng cha ti 80 C- i vi my bin p cng sut t 250 MVA tr xung; 0 75 C- i vi my bin p trn 250 MVA th cho php tip tc lm vic vi ph ti nh mc cho n khi t n nhit k trn nhng khng c ko di qu mt gi. b. Lm vic lu di vi ph ti gim bt khi nhit du lp trn cng 0 khng qu 45 C khi ngng ton b hoc mt phn qut gi, hoc ngng nc tun hon nhng vn duy tr tun hon du. My bin p loi tun hon du nh hng trong cc cun dy phi vn hnh theo ti liu hng dn ca nh ch to. iu 29: Cho php my bin p c vn hnh vi in p cao hn nh mc ca nc bin p ang vn hnh. a. Lu di 5% khi ph ti nh mc v 10% khi ph ti khng qu 0,25 ph ti nh mc. b. Ngn hn 10% (di 6 gi mt ngy) vi ph ti khng qu nh mc. iu 30: Cc my bin p lc cho php qu ti bnh thng, thi gian v mc qu ti ph thuc vo th ph ti ngy, nhit mi trng lm mt v mc non ti khi thp im. C th cn c vo cc bng 2 v 3 nh gi mc qu ti cho php. Bng 2: Thi gian qu ti cho php i vi my bin p lm mt kiu D v QG Thi gian qu ti (gi-pht) vi mc tng nhit ca Bi s qu ti theo lp du trn cng so vi nhit khng kh trc khi 0 nh mc qu ti, C 13,5 18 22,5 27 31,5 36 1,05 Lu di

1,10 1,15 1,20 1,25 1,30 1,35 1,40 1,45 1,50

3-50 2-50 2-05 1-35 1-10 0-55 0-40 0-25 0-15

3-25 2-25 1-40 1-5 0 0-50 0-35 0-25 0-10 -

2-50 1-50 1-5 0-50 0-30 0-15 -

2-10 0-20 0-45 0-25 -

1-25 0-35 -

1-10 --

Bng 3: Thi gian qu ti cho php i vi my bin p lm mt kiu KD v ND. Thi gian qu ti (gi-pht) vi mc tng nhit ca lp du trn cng so vi nhit khng kh trc khi Bi s qu ti theo 0 nh mc qu ti, C 18 24 30 36 42 48 1,05 Lu di 1,10 3-50 3-25 2-50 2-10 1-25 1-10 1,15 2-50 2-25 1-50 0-20 0-35 1,20 2-05 1-40 1-15 0-45 1,25 1-35 1-5 0 0-50 0-25 1,30 1-10 0-50 0-30 1,35 0-55 0-35 0-15 1,40 0-40 0-25 1,45 0-25 0-10 1,50 0-15 iu 31 : Cc my bin p vi mi kiu lm mt khng ph thuc thi gian v tr s ca ph ti trc khi s c, khng ph thuc nhit mi trng lm mt, khi s c u c php qu ti ngn hn cao hn dng in nh mc theo cc gii hn sau y, (xem bng 4 v 5). Bng 4: i vi my bin p du. Qu ti theo dng in, % 30 45 60 75 100 Thi gian qu ti, pht 120 80 45 20 10 Bng 5: i vi my bin p kh. Qu ti theo dng in, % Thi gian qu ti, pht

20 60

30 45

40 32

50 18

60 50

Cc my bin p u c php qu ti cao hn dng in nh mc ti 40% vi tng s thi gian khng qu 6 gi trong mt ngy m trong 5 ngy lin tip, vi iu kin h s ph ti ban u khng qu 0,93 (khi phi tn dng ht kh nng mi trang b lm mt ca my bin p). iu 32: Cc my bin p phi chu c dng ngn mch c tr s khng qu 25 ln dng nh mc m khng h hi hoc bin dng. Thi gian cho php dng ngn mch chy qua tnh bng giy khng c ln hn tk xc nh theo biu thc. 2 tk =1500/K Trong : K l bi s tnh ton ca dng ngn mch i vi nc in p chnh.K Uk 100 100 Sdm Sk

Trong : Uk l in p ngn mch ca my bin p, % Sdm l cng sut my bin p. Sk l dung lng ngn mch ca li. Trng hp my bin p c cp ngun t li c cng sut v hn ta c th xem bng 6: Bng 6: Thi gian cho php dng ngn mch my bin p. Bi s dng ngn mch Thi gian cho php dng Uk% n nh ngn mch (giy) 4 25 2,4 5 20 3,7 5,5 18 4 6,5 Tr ln 15,5 4 i vi my bin p t 35kV tr xung. tk = 4 giy. i vi my bin p t 35kV tr ln: tk = 3 giy. iu 33: cn bng ph ti gia cc my bin p ang lm vic song song c in p ngn mch khc nhau, cho php thay i t s bin p trong gii hn nh bng cch thay i nc in p vi iu kin khi khng c my bin p no qu ti. iu 34:

i vi my bin p c cc cun dy u theo s sao- sao pha in p thp c im trung tnh ko ra ngoi, dng in qua im trung tnh khng c vt qu 25% dng in pha nh mc. iu 35: im trung tnh ca cun dy t 110 kV ca my bin p t ngu phi lm vic ch ni t trc tip. Cc my bin p 110 v 220 kV vi in p th nghim im trung tnh tng ng bng 100 v 200kV c th lm vic vi im trung tnh khng ni t vi iu kin im trung tnh c bo v bng chng st van. Sau khi tin hnh nhng tnh ton c cn c cho php my bin p 110kV c din p th nghim im trung tnh bng 85kV c lm vic vi trung tnh khng ni t vi iu kin im trung tnh c bo v bng chng st van. Chng III KIM TRA MY BIN P TRONG VN HNH BNH THNG iu 36: bo m my bin p lm vic lu di v an ton cn: - Gim st nhit , ph ti v mc in p. - Gim st nghim ngt tiu chun v cht lng du v c tnh cch in. - Bo qun tt cc thit b lm mt, iu chnh in p, bo v du v cc trang b khc. iu 37: Khi xem xt my bin p ang vn hnh, nhn vin trc nht phi ng ngng ca phng t my pha trc ro chn. C th c php vt qua ro chn vi iu kin l cc mt bch pha di cc s trn np my bin p v nhng b phn c in trn li i khng c ro che phi cao ti thiu l: - 2,5m i vi in p t 10kV tr xung. - 2,75m i vi in p 35kV. - 3,5m i vi in p 110kV.iu 38:

i vi cc my bin p ca nh my in hoc trm c ngi trc phi cn c vo cc ng h o lng ca bng in kim tra vn hnh. Mi gi phi ghi thng s ca cc ng h (trong c c nhit du my bin p) mt ln. Nu my vn hnh qu ti th na gi ghi thng s mt ln. i vi cc my bin p khng c ngi trc mi ln i kim tra phi ghi in p, dng in v nhit du vo s vn hnh. i vi cc my bin p phn phi phi kim tra ph ti ba pha vo gi cao im xem c cn bng khng, nu cn phi c bin php phn b li ph ti.iu 39:

Xem xt, kim tra (khng ct in) my bin p phi tin hnh theo nh k sau: a) ni c ngi trc thng xuyn t nht mi ca mt ln i vi cc my bin p chnh ca nh my in v trm bin p, cc my bin p t dng lm vic v d phng, cc cun in khng. Ba ngy mt ln i vi cc my bin p khc. b) ni khng c ngi trc thng xuyn: i vi nhng my bin p t 1000kVA tr ln 15 ngy mt ln; nhng my bin p khc 3 thng mt ln, tu theo yu cu c th. Kim tra bt thng my bin p phi c tin hnh khi: a. Nhit my t ngt thay i. b. Khi my b ct bi r le hi hoc so lch.iu 40:

Ni dung cng vic kim tra, xem xt bn ngoi cc my bin p bao gm: 1 . Kim tra b mt cc s cch in, s u vo (c rn nt, bn, chy du). 2. Kim tra v my bin p c nguyn vn v c b r du khng. 3. Kim tra mu sc du trong bnh du ph, mc du trong bnh du ph v cc s c du, p lc du trong cc s p lc. 4. Kim tra tr s ca nhit k, p k. 5. Kim tra cc trang b lm mt v cc trang b ti sinh du lin tc. 6. Kim tra r le hi, van an ton, mt knh ng phng n, v tr ca van gia rle v bnh du ph. 7. Kim tra cc thit b bo tn hiu 8. Kim tra cc u cp, thanh dn, cc im ni xem tip xc c b pht nng khng. 9. Kim tra h thng ni t. 10.Kim tra ting ku ca bin p c bnh thng khng. 11.Kim tra mu sc ca ht ht m trong bnh th. 12.Kim tra tnh trng bung bin p: ca s, ca ra vo, l thng hi, n chiu sng, li chn... 13. Kim tra cc trang b phng, cha chy.iu 41 :

Du trong cc my bin p lm mt cng bc phi c tun hon lin tc khng ph thuc mc ph ti. Khng c php vn hnh my bin p lm mt cng bc nu khng ng thi a vo lm vic cc b bo tn hiu ngng du tun hon, ngng tun hon nc lm mt hoc ngng qut gi. Trong cc my bin p c h thng lm mt du bng nc, p sut du 2 phi cao hn p sut nc lm mt t nht 0,2 KG/cm . Phi cho tun hon nc sau khi chy bm du, khi ngng ch ct bm du sau khi ngng bm nc.iu 42:

Cc trang b phng chng chy t c nh, trang b thu gom du di my bin p v ng x du t ra phi c bo qun trong trng thi sn sng lm vic.

iu 43:

Mc du trong cc my bin p ang lm vic phi ngang vch du tng ng vi nhit du trong my hoc ng h bo mc du bo ng nhit du my.iu 44:

Vic ng in vo my bin p phi tin hnh theo trnh t sau: 1 . Trc khi ng in vo my bin p phi kim tra cn thn, tho g ht cc dy ni t, xem li bin bo, ro ngn tm thi. Cc phiu cng tc cho php lm vic phi thu hi. 2. Nu t ln th nghim sau cng n khi ng in thi gian qu 3 thng th phi tin hnh o in tr cch in, tng gc tn tht in mi (i vi cp in p cao hn 35kV), ly mu du phn tch gin n theo cc mc t 1,6,10 (xem ph lc 1). Ring i vi cc my bin p c np ni t hoc c mng cht do bo v du th th thm mc 11. Nu my bin p ni vi dy cp ngm khng qua dao cch ly th c th o in tr cch in my bin p cng vi cp nhng khi o phi ct my bin p o lng (nu c). 3. Kim tra tr s cc nhit k, p k, kim tra mc du. 4. Kim tra xem trong r le c kh khng, van ct nhanh, cc van ng ng dn du, van h thng lm mt van ln r le hi c m khng. Kim tra v tr nc b iu chnh in p xem c ng vi phiu chnh nh khng. Kim tra xem trn my bin p c d vt khng. 5. Kim tra ni t v my v c vt chy du trn my khng. 6. Kim tra xem cc u ra v trung tnh ca my bin p c c u vo chng st van nm trong s bo v my khng. 7. ng in vo my bin p theo cc quy nh ti iu 46.iu 45:

Vic ng in xung kch vo cc my bin p sau lp t, sa cha tin hnh theo trnh t sau: 1 . Tin hnh tt c cc mc nh iu 44 mc 1 -6. 2. Kim tra s tc ng ca ton b h thng r le bo v my. Sau khi kim tra xong phi c bin bn xc nhn. Tip im r le hi chuyn sang v tr ct, r le qu dng t thi gian 0 giy. 3. Kim tra s tc ng ca tt c cc my ct theo tt c cc bo v. 4. My bin p ng din khi tt c cc bo v u c a vo lm vic. 5. Vic ng in my bin p ch tin hnh t nht l sau 12 gi k t ln b sung du cui cng. 6. C th ng in my bin p t mt trong cc pha cao, trung, h p. Nu c iu kin th nng in p t t ln nh mc, nu khng c iu kin th ng in nh mc t nht 30 pht nghe v quan st trng thi my bin p.

Trong thi gian ny cho php ct cc qut gi cng bc ca my bin p 0 kiu QG v KD nhng nhit lp du trn cng khng c vt qu 60 C. 7. Tin hnh ng xung kch my bin p in p nh mc kim tra xem cc bo v chnh nh c ng khng (khng tc ng khi xung ng dng in t ho). 8. Nu kt qu xung kch tt my c php mang ti vo a vo vn hnh.iu 46:

Khi thao tc ng v ct my bin p cn theo cc quy nh di y: 1 . ng in vo my bin p phi tin hnh t pha cung cp in n c trang b bo v tnh trng sn sng ct khi my bin p s c. 2. Nu c my ct phi dng my ct ng hoc ct. 3. Hin nay hu ht cc trm u thc hin ng in vo MBT bng my ct. Nu khng c my ct c th dng dao cch ly 3 pha c b truyn ng c kh hoc b truyn ng in ng ct dng din khng ti cc my bin p theo bng 7. Cc dao cch ly 3 pha thng dng kiu trong nh hoc ngoi tri cp in p t 10kV tr xung cho php ng ct khng ti my bin p theo bng 7. Cc dao cch ly 3 pha thng dng kiu trong nh hoc ngoi tri cp in p t 10kV tr xung cho php ng ct khng ti my bin p t 1 000 kVA tr xung. Dng t ho ti a cho php ng ct ca my bin p c xc nh da trn iu kin qu p cho php vn hnh n 105% in p ng vi nc in p tng ng v khi dng din t ho bin p tng ln 1,5 ln so vi nh mc. Bng 7: in p nh mc dao cch ly 35kV 110kV Thng sDao chm dc1,6

Dao quay ngang2

Dao chm dc2 2,5 3

Dao quay ngang2,5 3 3,5

Khong cch ti thiu gia cc pha, m Dng t ho ti a ca bin p in p 105% nh mc, A Cng sut ti a ca my bin p, kVA

1-1,2

1-1,2

2,3

11

2,3

11

2

10

14,5

2

10

14,5

1800

20000

1800

20000

5600

31500

40000

5600

31500

40000

4. Vic ct dng in khng ti ca my bin p c cun dp h quang trung tnh ch c tin hnh sau khi ct cc cun dp h quang ny.

5. i vi nhng my bin p u theo s khi my pht- bin p khi ng vo vn hnh nn dng my pht in tng in p ln dn dn n in p nh mc. 6. i vi cc my bin p c b iu chnh in p di ti (AT) sau khi ct cc ph ti pha h tiu th th nn tng h s bin p trc khi dng dao cch ly ct pha ngun cung cp. iu 47: Tt c cc my bin p d phng u phi iu kin sn sng ng in bt c lc no. i vi nhng my bin p d phng m thi gian ngng vn

hnh ko di th phi quy nh thi gian ng in sy. R le ca my bin p d phng vn phi v tr pht tn hiu kp thi pht hin mc du h thp.iu 48: i vi nhng my bin p khng c b AT, trc khi thay i nc phi ct in v phi tin hnh theo phiu cng tc. i vi nhng my bin p t 1000 kVA tr ln sau khi chuyn nc cn kim tra li in tr mt chiu cc cun dy. i vi nhng my bin p di 1000kVA sau khi chuyn nc cn kim tra thng mch. iu 49: i vi nhng my bin p c b AT cn duy tr thng xuyn s tng ng gia in p li v in p nc iu chnh. Khng c vn hnh lu di my bin p vi b AT khng lm vic. iu 50: B AT ca my bin p phi c vn hnh theo ng quy nh ca nh ch to. Tnh hnh thay i nc in p phi c ghi vo nht k vn hnh. Khng c php chuyn nc iu chnh trong trng hp my

bin p ang qu ti nu dng ph ti vt qu dng nh mc ca b AT.iu 51: tng ni, phi xc nh s lng my bin p lm vic ng thi tu theo biu ph ti c xt n tin cy cung cp in cho cc h dng in. cc li phn phi in p 15kV tr xung, phi tin hnh o ph ti v in p ca cc my bin p mi qu t nht mt ln vo thi k ph ti cao nht v thp nht. iu 52: My bin p c php lm vic song song vi cc iu kin sau: a. T u dy ging nhau. b. T s bin p bng nhau hoc chnh lch khng qu 0,5% c. in p ngn mch chnh lch khng qu 10%. d. Hon ton ng v pha.

iu 53: i vi my bin p sau khi lp xong hoc sau khi tin hnh nhng cng vic c th lm thay i v tr pha th trc khi a vo vn hnh tr li phi th ng pha vi li hoc vi my bin p khc s lm vic song song. iu 54: Khi mc du trong my bin p ln cao qu mc quy nh phi tm ra nguyn nhn. Khi cha tch ri mch ct ca r le hi th khng c m cc van tho du v van x kh, khng c lm nhng thao tc khc trnh r le hi tc ng nhm. Chng IV X L MY BIN P VN HNH KHNG BNH THNG V S C iu 55: Trong khi vn hnh nu thy my bin p c nhng hin tng khc thng nh chy du, thiu du, my b nng qu mc, c ting ku khc thng, pht nng cc b u ct s, b AT hot ng khng bnh thng... phi tm mi bin php gii quyt, ng thi bo co vi cp trn v ghi nhng hin tng, nguyn nhn vo s nht k vn hnh. iu 56: My bin p phi c a ra khi vn hnh trong cc trng hp sau y: 1 . C ting ku mnh khng u v ting phng din bn cnh my. 2. S pht nng ca my tng ln bt thng v liu tc trong iu kin lm mt bnh thng, ph ti nh mc. 3. Du trn ra ngoi my qua bnh du ph, v knh phng n hoc du phun ra qua van an ton. 4. Mc du h thp di mc quy nh v cn tip tc h thp. 5. Mu sc ca du thay i t ngt. 6. Cc s b rn, v, b phng in b mt, p lc du ca cc s kiu kn khng nm trong quy nh ca nh ch to. u ct b nng . 7. Khi kt qu phn tch du cho thy du khng t cc tiu chun ca ph 0 lc1, hoc khi chp chy gim qu 5 C so vi ln th nghim trc. iu 57: Khi my bin p qu ti cao hn nh mc quy nh, nhn vin trc ca phi tm bin php iu chnh v gim bt ph ti ca my. iu 58: Khi nhit du trong my bin p tng ln qu mc gii hn, nhn vin trc ca phi tm nguyn nhn v bin php gim bt nhit bng cch: 1 . Kim tra ph ti ca my bin p v nhit mi trng lm mt. 2. Kim tra thit b lm mt, tnh hnh thng gi ca bung t my. Nu nhit ca my bin p ln cao do thit b lm mt b hng m c iu kin ct my sa cha th nn ct my sa cha, khi iu kin vn hnh khng cho php ct my hoc khi khng cn ct my vn c th sa cha

c th ch cn ngng ring thit b lm mt, ng thi nhn vin trc ca phi iu chnh gim bt ph ti cho ph hp vi cng sut ca my bin p trong iu kin vn hnh khng c thit b lm mt. iu 59: Nu mc du h thp mc quy nh th phi b sung du. Trc khi b sung du phi sa cha nhng ch r, b chy du. Nu v nhit tng cao m mc du trong my bin p ln cao qu vch quy nh th phi tho bt du khi my. Nu mc du trong cc s c du h thp gn ht ng thu ch mc du hoc khi p lc du trong cc s kiu kn thp di mc quy nh th phi np b sung du v tm nguyn nhn khc phc. Khi b sung du phi theo ng quy nh ca nh ch to trnh lt kh vo s. iu 60: Khi r le hi tc ng bo tn hiu phi xem xt bn ngoi my bin p, ly mu kh trong r le phn tch v kim tra tnh cht chy ca kh. Nu kh chy c hoc trong kh c cha nhng sn phm do phn hu cht cch in phi nhanh chng ct my bin p. Trng hp cht kh khng sc, khng mi, khng t chy c th vn c th my bin p tip tc vn hnh. R le hi c th pht tn hiu nhm do cc l do sau: 1 . Lt kh vo my bin p do c s h trong h thng lm mt cng bc hoc khng kh vo theo du khi lc du hoc bm du mi cha kh kh. 2. Thiu du, mc du h qu thp. 3. Xung ng do ngn mch trn li lm du b y ng c ln bnh du ph. 4. Chnh lch p sut trong bnh du ph v ng phng n. 5. S c, chm chp mch nh th. iu 61 : Khi kim tra cht kh c th chy c hay khng phi ht sc thn trng, khng c a la qu gn van x kh ca r le hi m phi cch 5-6 cm v hi chch sang mt pha. iu 62: Nu nguyn nhn r le hi tc ng khng phi l do khng kh lt vo my bin p th phi kim tra nhit chp chy ca du v nu nhit chp 0 chy gim qu 5 C so vi ln th nghim trc th phi tch my ra khi vn hnh. Nu nguyn nhn r le hi tc ng l do khng kh trong du thot ra th phi x ht khng kh trong r le hi. Trng hp x nhiu ln khng ht khng kh th cho php chuyn r le hi sang v tr bo tn hiu v bo co ngay vi cp trn. iu 63:

Cn c theo mu sc v tnh cht ca kh tch lu trong r le hi c th s b xc nh tnh cht s c nh sau: Tch cht ca kh Mu vng, khng t chy c Mu tro nht, mi hi, t chy c Mu , mu en d chy Tnh cht s c G b chy Giy, cc tng cch in b chy Du b chy, phn hu

iu 64: Khi my bin p b ct do r le hi hoc r le so lch th ch c a my tr li vn hnh sau khi xem xt, th nghim, phn tch mu kh v khc phc nhng im bt thng. Nu vic ct my bin p dn n vic ngng cp in cho nhng

h s dng in quan trng, cho php dng my ct ng li mt ln nu my bin p c c bo v so lch v bo v hi nhng ch b ct bi mt trong hai bo v v khng thy r du hiu bn ngoi chng t my h hng. Trng hp my bin p b ct do cc bo v khc ngoi so lch v r le hi c th ng my bin p tr li lm vic khng cn kim tra.iu 65: Khi my bin p b chy cn phi ct hon ton in p khi my, bo cng an cu ho , cp trn v tin hnh dp la theo quy trnh phng chng chy n.

Phi tin hnh x du van x du s c ti y my nu iu kin cho php. c bit ch khng la lan n cc my bin p v cc thit b in khc xung quanh.Chng V QUN L DU MY BIN P iu 66: i vi nhng my bin p mi a vo vn hnh cn ly mu th nghim theo cc thi hn sau: - Vi my bin p 110 kV, sau khi ng in 10 ngy, 1 thng, tip theo nh iu 68 ca quy trnh ny. - Vi my bin p t 220 kV tr ln, sau khi ng in 10 ngy, 1 thng, 3thng, tip theo nh iu 68 ca quy trnh ny. Mu du c th theo cc mc t 1 n 6 v mc 10 ca ph lc I. Ring vi cc my bin p c bo v du bng ni t hoc mng cht do cn th b

sung thm mc 11 .

iu 67: Trong giai on u mi vn hnh cn tin hnh phn tch sc t kh ho tan trong du trong thi hn sau: - Sau 6 thng vi my bin p 110 kV cng sut d i 60.000 kVA. - Sau 3 ngy, 1 thng, 3 thng, 6 thng vi my bin p 110 kV cng sut t 60.000 kVA tr ln v tt c cc my bin p 220-500 kV. iu 68: Du bin p trong vn hnh phi c ly t mu th mi nm mt ln. Ngoi ra sau cc ln i tu, sau khi pht hin tnh trng bt thng

cn phi th mu du t xut. Nu xut hin kh chy c trong r le hi th cn xc nh li im chp chy ca du. Du phi t cc tiu chun theo ph lc I.iu 69: Vic lc du v ly mu du c th tin hnh khi my bin p c ct in hoc khi my ang vn hnh. Nhng vic do nhn vin trc ca lm hoc do nhng nhn vin khc lm (ti thiu l hai ngi) di s gim st ca nhn vin trc ca. Vi iu kin l lc trong li vi im trung tnh cch in khng c chm t.

Khi lc du my bin p ang lm vic th r le hi ch v tr pht tn hiu, cn bo v r le khc th vn phi v tr sn sng ct my bin p .iu 70:

ko di thi hn s dng du my bin p cn ch thay th ht hp ph trong cc bnh xi phng nhit v ht ht m trong bnh th ca my. Ln thay ht hp ph u tin tin hnh mt nm sau khi a my vo vn hnh v sau cn phi thay khi tr s a xt trong du t ti 0,1 mgKOH trn gram du hoc khi hm lng a xt ho tan trong nc ln hn 0,014mgKOH. Ht ht m trong bnh th my bin p cn phi thay khi mu ch th i t xanh sang hng nhng t nht cng phi thay 6 thng mt ln. m ca ht hp ph trc khi np vo bnh lc khng vt qu 5%.iu 71 : Trng hp cn b sung du bin p m khng r gc du trong my hoc khng c loi du cng gc th phi tun theo cc nguyn tc sau: 1 . i vi nhng my bin p c cng sut di 1000 kVA, in p t 10kV

tr xung c php b sung bng du gc bt k, vi iu kin du b sung

phi t mi tiu chun th nghim theo ph lc I v tng lng du b sung trong sut qu trnh vn hnh khng vt qu 10% lng du trong my. 2. i vi nhng my bin p c cng sut 6.300 kVA v cp in p t 35kV tr xung c php b sung du khc gc vi iu kin: a. Du b sung t mi tiu chun th nghim theo ph lc I. b. Hn hp du b sung v du trong my c th khng xy ho v t tiu chun theo ph lc I. T l pha trn khi th khng xy ho bng t l b sung du trong thc t. c. Hn hp du b sung v du trong my phi c tr s tgd thp hn v n nh khng xy ho tt hn so vi cc tr s tng ng ca mt loi du thnh phn xu nht khi cha pha trn. 3. i vi nhng my bin p c cp in p 110kV tr ln vic trn du bin p do cp trn quyt nh. Chng VI SA CHA MY BIN P iu 72: Tu theo khi lng cng vic thc hin, cng tc sa cha c chia ra cc cp nh sau: - Tiu tu: Tu sa cha my bin p c ct in nhng khng tho du v khng m rut my. - i tu nh k: Rt b my hoc rt rut my ra khi v. Kim tra sa cha ton din my. C th bao gm c sy my. - i tu phc hi: Tu theo tnh trng cun dy c th thay th hon ton qun li mt phn hay sa cha cc b. Cng c th bao gm c sa cha li tn, phc hi cch in cc l tn. iu 73: nh k sa cha i vi cc my bin p nh sau: 1 . Tiu tu my bin p tin hnh theo cc nh k sau: - i vi cc my bin p c AT: mi nm mt ln. - i vi cc my bin p chnh ca nh my in v trm bin p, cc my bin p t dng t nht mt ln trong mt nm. - i vi cc my bin p t ni c nhiu bi bn th thu theo iu kin c th m c quy nh ring. - i vi tt c cc my bin p khc t nht mt ln trong 2 nm. Vic tiu tu cc b AT thc hin sau mt s ln chuyn mch theo quy trnh ca nh ch to. Tiu tu cc h thng lm mt dng QG, KD, ND phi tin hnh hng nm. ng thi vi tiu tu my bin p phi tin hnh tiu tu cc s u vo. 2. i tu nh k my bin p tin hnh: i vi tt c cc my bin p: Tu thuc vo kt qu th nghim v tnh trng my.

3 . i tu phc hi tin hnh sau khi cc my bin p b s c cun dy hoc li tn hoc khi c nhu cu ci to my bin p. iu 74: i vi cc my bin p lp t mi c vn chuyn khng du bo qun bng ni- t cn c bin php y ht ni-t ra khi my trc khi cho ngi chui vo. Vic y ni-t tin hnh theo cc cch sau: 1 . Bm du bin p tiu chun theo ph lc I vo my qua van y cho ti khi y ht nit ra ngoi. 2. i vi cc my bin p c v chu c chn khng tuyt i th dng bm chn khng rt chn khng trong my n 660mmHg ri x kh qua bnh silicagen vo my. Lng silicagen trong bnh khng c t hn 5kg. 3. Thng thi rut my bng khng kh kh v sch hoc m cc ca ngi chui thng gi t nhin. Trong trng hp ny cn chp hnh nghim chnh cc yu cu v m rut my trnh nhim m. Ch cho php bt du lm vic khi hm lng -xy trong my vt qu 18%. iu 75: Cc cng vic d gy chy nh hn h quang... phi tin hnh cch rut my t nht l 5m. iu 76: Phi c phng n phng chng chy n ti khu vc sa cha. Phng n ny phi ph hp vi quy trnh phng cha chy cho cc thit b in. iu 77: Nu cn phi tin hnh hn v my bin p th mc du trong my phi cao hn im hn t nht 200-250mm. iu 78: trnh xut hin in tch tnh in khi bm du hoc bm ra khi my cn tip a cc cun dy v v my bin p. iu 79: Trc khi tin hnh cng tc sa cha cn phi tin hnh cng tc chun b bao gm: 1 . Chun b mt bng sa cha b tr cc thit b thi cng, cc dung tch cha du v khi cn thit phi c mt bng rt rut hoc rt v my. 2. Xc nh kh nng v phng php x l lng du cn thit. 3. Chun b dng c, ngh, nguyn vt liu, thit b, thit b cng ngh, kch ko, cu trc... 4. Xc nh khi lng v trnh t thc hin cc thao tc sa cha, th nghim, hiu chnh cn tin hnh. 5. Lp tin cho cc bc cng ngh, xc nh s lng, thnh phn, tay ngh cn thit ca i sa cha. 6. Chun b ngun in, ngun nc thi cng cn c vo nhu cu ca cc thit b cng ngh v nhu cu sy my bin p.

7. Chun b cc ti liu k thut, cc mu bin bn sa cha v bin bn th nghim cn thit thc hin cng vic cng nh bn giao sau ny. 8. Chun b phng n phng chng chy n, ph bin phng n ny v cc quy trnh i tu, quy trnh k thut an ton cho ton th i sa cha. iu 80: Tu thuc kch thc v v trng lng my bin p c th c chuyn ch theo cc cch sau: 1 . c lp y bnh du ph, cnh tn nhit, y du n mc vn hnh. Cch ny ch yu dng cho cc my bin p n 35kV, cng sut di 10.000 kVA, lm mt bng tun hon du t nhin. 2. Tho di bnh du ph, cch lm mt, c du n cch mt my 200- 250mm.

Cch chuyn ch ny p dng cho cc my bin p cng sut t 16.000 kVA tr ln hoc in p 110 kV tr ln.3. Chuyn ch khng du, c thit b ph np ni t trn ng. Thit b ny 2 bo m duy tr p lc ni-t 0,4 KG/cm trong vng 30 ngy.

Cch chuyn ch ny p dng cho cc my c cng sut ln. Nu thi gian chuyn ch ln hn 30 ngy th phi thay th cc bnh ni-t.iu 81: i vi cc my bin p mi v lp ngay sau khi my c chuyn ch n v tr lp t cn kim tra. 1 . Tnh trng chng buc my trn phng tin vn chuyn. Cc vt sn nh du trn v my v v trn sn xe phi trng nhau. 2. Nu my c chuyn ch khng du c ph np ni-t th p lc trong 2 my phi trong khong 0,4KG/cm . 3. Tnh trng v my, cc kp ch nim phong, cc giong, cc van trn my, tt c phi cn nguyn vn, trn v my v trn sn xe khng c c vt chy du. 4. Tnh trng ca cc s u vo v cc ph kin tho ri khc ca my. Cc chi tit ny khng c c cc h hi c hc. Khi pht hin tnh trng bt thng cn lp bin bn vi n v vn chuyn my bin p. 5. Kim tra cht nh v khng suy chuyn. iu 82: Vic cu h my bin p c thc hin bng cn trc c sc nng ph hp. V tr mc cp phi ng ni quy nh ca nh ch to. Tuyt i trnh cp cu t vo s cch in ca my. i vi cc my bin p c ln vic h my t phng tin vn chuyn xung c thc hin bng cch dng ti hoc xe ko my trt trn cc thanh ray t di y my trn cc lp t-vt. Cc thanh ray ny phi t cnh sng chu lc ca y my v c s lng nh sau: - t nht l 2 thnh vi trng lng my di 60 tn

- t nht l 3 thanh vi trng lng my di 120 tn - t nht l 4 thanh vi trng lng my di 220 tn - t nht l 6 thanh vi trng lng my vt qu 220 tn.

Vic nng my bin p c ln c thc hin bng cc kch thu lc. Kch phi t ng v tr do nh ch to quy nh. Khi nng dn u my phi bo m nghing ca my bin p khng qu 3%.Nu my c lp bnh xe c th ko my di chuyn bng ti hoc palng. Tc ko khng c qu 8m/pht trn nhng on ng bng phng c un khng qu 2mm trn 1 mt chiu di. Cho php ko c hai chiu dc v ngang i vi nhng my bin p c 4 bnh xe v cho php ko theo chiu ngang vi nhng my c trn 4 bnh xe trn nhng on ng dc khng qu 2%. iu 83: Khng qu 10 ngy k t khi nhn c my bin p cn phi nh gi s b tnh trng cch in ca my nh sau: 1 . i vi cc my bin p c nh c chuyn ch vi bnh du ph lp sn v y du kim tra: - Mc du trong bnh du ph. - in p chc thng ca du. Cc thng s ca du phi ph hp vi ph lcI. 2. i vi cc my bin p c vn chuyn vi bnh du ph tho di v du cch mt my 200-250mm cn kim tra: - Xem xt bn ngoi my. - Kim tra xem trong my c p lc d hoc chn khng hay khng bng cch h m mt bch trn mt my xem c ting khng kh rt khng. - Kim tra in p chc thng ca du trong my v trong khoang tip im dp la ca b AT (nu c) i vi cc my bin p t 110 kV tr ln. Cc thng s ca du phi ph hp vi ph lc I. Nu trong my khng c p 2 lc d hoc chn khng th cn to p lc d 0,25 KG/cm bng cch sau: - Hoc np ni- t di dng kh. - Hoc dng my nn kh bm qua bnh silicagen. - Hoc bm du t tiu chun theo ph lc I vo y my. Duy tr p lc k trn trong 3 gi, nu p lc ny tt xung khng di 0,23 2 KG/cm th my bin p c coi l kn. Trng hp ngc li phi tm cch khi phc li kn ca my. 3. i vi cc my bin p c vn chuyn khng du c ph np ni-t cn kim tra. - Xem xt bn ngoi my. - Kim tra p lc trong my phi dng theo ng h p lc ca my. - Kim tra p lc chc thng ca du ng ti y my v trong khoang tip im dp la ca b AT.

- Kim tra tang gc tn tht in mi v hm lng nc ca du ti y my v trong khoang tip im ca b AT (nu c) i vi cc my bin p t 110kV tr ln. Cc thng s ca du phi t cc tiu chun theo ph lc I.

Nu trong my khng p lc dng th phi tin hnh cc thao tc nh iu 83 mc 2 quy nh.iu 84: Nu cc my bin p mi nhn khng c a ngay vo lp t th khng c php bo qun my trong trng thi chuyn ch qu 3 thng k t ngy n. i vi cc my bin p c vn chuyn khng du, trong 10 ngy u tin mi ngy kim tra p lc ni-t mt ln, sau c mt thng kim tra mt ln. Khi thi gian bo qun qu 3 thng cn lp bnh du ph v bm du t tiu chun ca ph lc I vo y my. Du bm qua van y my phi c nhit 0 khng sai khc qu 5 C so vi nhit rut my v khi bm khng cn to chn khng trong my, bnh du ph ca my c bnh h hp. i vi cc my bin p c bo v du bng ni-t hoc mng cht do cho php khng a cc bo v ny vo lm vic m ch dng mt bnh h hp cha trn 5kg silicagen nu thi gian bo qun di 6 thng.

C 3 thng mt ln phi ly mu du trong cc my bin p trng thi bo qun phn tch gin n nh cc mc 1 n 3 ca ph lc I.iu 85: Tiu tu my bin p bao gm: cc hng mc sau: 1 . Xem xt bn ngoi v sa cha cc h hng nh c th khc phc c ngay. 2. V sinh v my v cc s du vo. 3. X cn bn ca bnh du ph, b sung du bnh du ph, thng ra ng thu, kim tra ng h mc du. 4. Thay silicagen trong cc bnh xi-phng nhit v bnh h hp. 5. Kim tra cc van v cc giong. 6. Kim tra v v sinh h thng lm mt, kim tra, thay th, b sung m cc vng bi ng c ca h thng lm mt. 7. Kim tra cc bo v v chng st. 8. Kim tra mng phng n ca my v ca b AT (nu c). 9. Kim tra cc s u vo. i vi cc s u vo c du kiu h th thay du trong cc vch ngn du, thay silicagen bnh h hp (nu c). 10.Ly mu du my th nghim theo cc mc 1 n 6; 10 ca ph lc I. 11 .Kim tra cc trang b bo v du chng l o ho v -xy ho (mng cht do...). 12.Th nghim my bin p. 13.i vi cc my bin p c b AT th sa cha ngoi nh k b ny theo hng dn ca nh ch to. iu 86:

i tu nh k my bin p bao gm cc hng mc sau: 1 . Rt v my hoc rt rut my ra khi v. 2. Kim tra v sa cha rut my v gng t, k c cc b iu p khng ti v c ti. 3. Sa cha v my, bnh du ph, ng phng n, cc dn ng lm mt, cc van, s u vo. 4. Sa cha cc thit b lm mt, bnh lc xi-phng nhit, bnh ht m. 5. V sinh v sn li v my (nu cn). 6. Kim tra cc ng h o lng, trang b bo hiu, r le bo v cc mch nh th. 7. Sa cha cc thit b ni vi my bin p nh cp in lc, my ct in, dao cch ly, my bin dng din, my bin p o lng, chng st... 8. Lc li du hoc thay du mi. 9. Sy li rut my (nu cn). 1 0.Lp li my bin p. 11 . Th nghim my bin p. Ni dung c th cc hng mc 1 v 2 xem trong ph lc s 3. Ni dung c th cc hng mc 3 v 4 xem trong ph lc s 5. Ni dung c th cc hng mc 8 xem trong ph lc s 1 Ni dung c th cc hng mc 9 xem trong ph lc s 6 Ni dung c th cc hng mc 10 xem trong ph lc s 7 Ni dung c th cc hng mc 11 xem trong ph lc s 2 iu 87: Khi a my vo i tu nh k phi lp bin bn bn giao gia n v sa cha v n v qun l vn hnh. My bin p c bn giao cho bn sa cha vi y ti liu

k thut, l lch vn hnh, ni dung v bin bn ca cc ln sa cha trc y.iu 88: My bin p sau i tu c bn giao cho bn vn hnh bng bin bn bn giao km theo nht k s cha v cc bin bn th nghim. iu 89: Trc khi i tu my bin p phi tin hnh th nghim ton my so snh vi s liu sau i tu. iu 90: i tu phc hi my bin p bao gm cc hng mc nh khi i tu nh k nhng tu theo tnh trng rut my m tin hnh sa cha cc b, thay th hoc qun li mt phn hay ton b cun dy, phc hi tnh cht cch in ca cc l tn, thay th cc chi tit cch in ca rut my...

Vic sy my bin p sau i tu phc hi l bt buc bt k s liu th nghim kim tra rut my ra sao.

Ni dung c th vic sa cha rut my xem ph lc s 4. Cc ph lc km theo: 1 . Tiu chun th nghim du cch in dng cho cc my bin p. Lc du bin p. Bm du bin p vo my khng ht chn khng v c ht chn khng. 2. Thi hn, khi lng v tiu chun th nghim my bin p. Phng php th. 3. Kim tra v sa cha nh rut my, rt rut hoc rt np chung my bin p. 4. Sa cha phc hi rut my bin p c thay th mt phn hoc hon ton cun dy. 5. Sa cha cc ph kin my bin p 6. Sy v ph sy my bin p. 7. Lp rp my bin p mi hoc sau i tu i vi my bin p c in p 110kV tr ln. 8. Mt s tiu chun cng ngh trong sa cha my bin p. 9. Sa cha v hiu chnh cc b iu chnh in p. Ph lc 1 Phn 1 Tiu chun du bin p Phn 2 Phn tch mu du trong MBA lc Phn 3 Lc du bin p Phn 4 Bm du vo MBA c chn khng v khng c chn khng Phn 1. TIU CHUN DU BIN P No Hng mc th nghim Du mi trong my Du trong vn hnh 1 in p chc thng, KV Di 15KV 30 25 35 30 15 n 35KV 45 40 Di 110 KV 110 n 220 KV 60 55 500 KV 70 60 2 Tang gc tn tht in mi khng qu , % 0 20 C 0,2 1 0 2,2 7 90 C 3 Tr s axit mg KOH 0,02 0,25 trong 1g du khng qu Hm lng axit v kim 4 Khng c 0,1 mg KOH 5 6ho tan trong nc Hm lng tp cht c hc theo khi lng khng qu, %

Khng c 135

Khng c Gim khng qu 5 C so vi ln phn tch trc.0

Nhit chp chy kn 0 C khng thp hn

7

8 9

10 11

Khi lng cn khng qu,% - Tr s axt du sau xy ho mg KOH trn 1g du khng qu Ch s natri khng qu 3 nht ng m /s khng ln hn 0 20 C 0 50 C Hm lng nc theo khi lng khng qu , % Hm lng kh ho tan khng qu, % 220 n 330KV 500KV

0,01 0,10 0,4 28 9,0 0,001

Khng th Khng th Khng th Khng th Khng th 0,0025

1,0 0,5

2,0 2,0

Ghi ch: 1. Mc 11 ch tin hnh i vi cc my bin p c bo v bng mng cht do hoc ni-t. Trong trng hp c cc thit b kh kh du t ti chn khng trn 759mmHg trong khoang chn khng th khng cn kim tra hng mc ny. 2. Mc 10 ch kim tra i vi cc my bin p c bo v bng mng cht do. i vi cc my bin p khng c bo v bng mng cht do, cp in p t 100-150KV cng nn kim tra hm lng nc. i vi cc my loi ny hm lng nc cho php khng qu 0,002% (20g/tn). 3. Mc 2 ch bt buc i vi my bin p t 110KV tr ln. 4. Vic kim tra gin n du cch in ch bao gm cc mc 1,3,4,5 v 6. 5. i vi du bin p Ty u khi a vo vn hnh: 0 tg gc tn tht in mi 90 C. - in p 110KV: tg 1,5% - in p > 110 KV: tg 1%.

Phn 2. PHN TCH MU DU TRONG MY BIN P LCI. Cc gii hn cho php ca cht lng du v mt s li khuyn: 1. Cc kh ho tan trong du: Cn lu rng cc mc kh lit k di y i vi du trong my bin p lc ch l cc gi tr mong mun. S chnh lch ln hn cc gi tr ny cng c th thu c. i vi cc trng hp ny tc thay i cc kh theo thi gian l mt tiu chun quan trng xc nh lng ca du.

Cc gi tr an ton ca cc kh ho tan nh l mt hm s ca thi gian 0 vn hnh (hm lng kh tnh bng ppm 20 C). Thi gian vn hnh (nm) 0-3 3-6 6-12 12-15 Ln hn 15 50 150 250 300 500 Hydrogen(H2) 50 100 100 100 150 Methane(CH4) 100 100 100 100 100 Ethane(C2H6) 100 150 150 150 200 Ethylene(C2H4) 15 60 150 150 150 Acetylene(C2H2) CarbonMonoxide(CO) 300 1000 1000 1000 1.500 3000 5000 10.000 10.000 15.000 Carbondioxide(CO2) H2 v C2H2 c th thu c vi mc ln du b iu chnh in p di ti ca my bin p. Khi tin hnh phn tch cc kh ho tan trong du, nu hm lng cc kh H2 v C2H2 vt qu cc gi tr cho php cn lu n hin tng r du t bung cha tip im dp h quang ca b iu chnh din p di ti n thng du chnh. Bng di y a ra mt s hng dn cho trng hp ny. Tc thay i cc kh ho tan sau 24 gi. TnTrng hp bnh thng Tr s axits mg KOH/gram Trng hp nghim trng

Hydrogen(H2) Methane(CH4) Ethane(C2H6) Ethylene(C2H4) Acetylene(C2H2) CarbonMonoxide(CO) Carbondioxide(CO2)

50 > 500 > 1000

Bng di y c tc dng nh mt cng c chun b on v a ra kh ch yu phn loi s c. Hydrogen Methane Ethane Ethylene Acetykene (H2) (CH4) (C2H6) (C2H4) (C2H2) Phng in c cc b X S L - C h quang X S L X-im nng: + Nhit thp + Nhit cao

S S

X

S X

Ghi ch: - X: Kh chnh - L: Kh sinh ra ng thi vi s lng ln - S: Kh sinh ra ng thi vi s lng nh. 2. Hm lng m: Gi tr c th chp nhn c mc m ca du my bin p c ch ra th km theo trng lng hm lng m ca giy cch in trong my bin p. T l % m theo trng lng Cng vic phi thc hin ca giy cch in < 1,5% Khng cn x l Thng thng x l gia nhit hoc chn khng 1,5% - 3,5% du bng cch nng nhit cun dy Nhanh trng sy kh cun dy bng nhit hoc Trn 3,5% chn khng ti gi tr mong mun 3. Tr s axt v sc cng b mt. Tr s axt mgKOH/gram < 0,1 0,1- 0,2 > 0,2 Sc cng b mt V /hoc V /hoc V /hoc > 25 20-25 < 20 Cng vic phi thc hin Khng cn x l Yu cu x l du C th yu cu thay th hoc tng cng x l du Dng s c 20 21 22 23

Tng lng kh chy (TCG) TCG ( L/L) 0-500 501 - 1000 100 - 2500 >2500

CH4 H2

Phng php h s ROGER Cc h s c tnh khi c 2 kh vt qu gii hn cho php (Loi tr CO v CO2 ). Bng mt Bng hai C2H6 C2H4 C2H2 CH4 C2H6 C2H4 C2H2 CH4 C2H6 C2H4 H2 CH4 C2H6 C2H4

Dng s c

0 0 0 1 1 0 0 0 0 1 1 0 0 0 0 0 0 0 0

0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 1 0 1 1 0 0 0 1 0 1 0 0

0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 or 1 0 1 0 0 or 1

>0,01 0,1 >0,1 0,1 1,0 >0,1 3,0 >0,1 3,0 >0,1 1,0 >0,1 1,0 >0,1 1,0 0,1