Huong Dan Thu Nghiem Tram

CNG TY THY IN A NHIM - HM THUN - A MI

CNG HA X HI CH NGHA VIT NAM

TRUNG TM DCH V K THUT PHN XNG T NG

c lp - T do - Hnh phcHm Thun, ngy 08 thng 11 nm 2010

HNG DN TH NGHIM CC THIT B TRM BIN PI. CC HNG MC TH NGIM MY BIN P LC 1. o in tr cch in cun dy R60

Hnh I-1: S u ni o in tr cch in cun dy MBA am bao kt qua o c chich xac cn tun theo cac iu kin sau : (1) Thao tac o chi tin hanh nhit cun dy t 100C tr ln i vi cac may bin ap t 150 kV tr xung va t 300C tr ln i vi cac may bin ap t 220 kV tr ln; (2) i vi cac may bin ap 110 kV, cng sut 80.000 kVA tr ln hoc in ap 220 kV tr ln, nn o cach in nhit sai khac khng qua + 50C so vi nhit khi nha ch tao o. i vi cac may bin ap di 150 kV, cng sut di 80.000 kVA sai khac nhit trn khng qua 10 0C; Nu nhit o tai hin trng sai khac so vi nha ch tao thi cn quy i kt qua v cung mt nhit theo h s K1 trong bang I -1 : Bang I-1. H s quy i K1 Chnh lch nhit (oC) H s quy i K1 1 2 3 4 5 10 15 20 25 30 3,40 1,04 1,08 1,13 1,17 1,22 1,50 1,84 2,25 2,75

Trong trng hp chnh lch nhit khng co trong bang trn thi ta co th tinh ra bng cach nhn cac h s tng ng :

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Vi du: Chnh lch nhit la 9 oC khng co trong bang I-1: K9 = K5K4 = 1,22. 1,17 = 1,42 (3) Nhit cun dy i vi cac may bin ap t 35 kV tr xung c coi la bng nhit lp du trn cung, nhit cun dy i vi cac may bin ap trn 35 kV c coi la nhit cun dy cao ap pha B xac inh bng phng phap in tr mt chiu theo cng thc sau: tx = Rx / R0 (235 + t0 ) - 235 R0 - in tr cun dy o nha ch tao nhit t0 Rx - in tr cun dy o nhit tx (4) i vi cac may bin ap 110 kV tr ln trc khi o in tr cach in cn tip ia cun dy cn o khng di 120 giy. Nu kt qua cn kim tra lai thi trc khi o ln tip theo cn tip ia lai cun dy cn o khng di 300 giy. Nu khng co s liu cua nha ch tao so sanh thi co th tham khao gia tri ti thiu cho phep cua in tr cach in theo bang I-2. Bang I -2. Gia tri in tr cach in (M) Cp in ap cun cao ap T 35 kV tr xung c cng sut di 10.000 kVA T 35 kV c cng sut 10.000 kVA tr ln va 110 kV tr ln khng phu thuc cng sut Nhit cun dy (oC) 10 20 30 40 50 90 60 60 70 40 80

450 300 200 130

900 600 400 260 180 120

Nu may cha y du thi cho phep tin hanh o in tr cch in khi mc du cach mt may 150 - 200 mm, vi iu kin cac phn cach in chinh cua may ngm hoan toan trong du. T s hp th k = R60/R15. T s hp th khng tiu chun ha. Thng thng trong khong nhit t 1030oC, t s ny khng thp hn 1,3 i vi cc my bin p c cch in khng b nhim m. Nu nhit cao hoc thp hn khong trn, t s hp th c th gim thp 2. in tr cch in ca cc mch iu khin in tr cch in ca cc mch iu khin vi t phi c o bng mgm met c in p 500V. Quy chun ca cc in tr cch in phi ln hn 2M. 3. o tg o tang goc tn tht in mi (tg) bt buc i vi may bin ap t 110 kV tr ln

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va may bin ap t 35 kV tr ln c cng sut t 10000 kVA tr ln. am bao kt qua chinh xac cn theo cac lu y (1), (2), (3) cua muc 1. Cung ging nh R60 tri s cua tg khng tiu chun hoa ma so sanh vi s liu xut xng hoc so vi ln thi nghim trc. Tuy nhin khi khng co cac s liu nay co th tham khao gia tri ti a cho phep cua tg %, cun dy may bin ap tai bang I-3. Bang I-3. Gia tri tg % cun dy may bin ap Cp in ap cun cao ap T 35 kV tr xung c cng sut di 10.000 kVA Trn 35 kV c cng sut 10.000 kVA tr ln va trn 110 kV khng phu thuc cng sut Nhit cun dy (oC) 10 1,2 0,8 20 1,5 1,0 30 2,0 1,3 40 2,6 1,7 50 3,4 2,3 60 4,5 3,0 70 6,0 4,0

Trng hp nhit khi o sai khac vi nhit nha ch tao o luc xut xng, ta cn quy i v cung mt nhit theo h s K2 trong bang I -4: Bang I-4. H s quy i K2 Chnh lch nhit (oC) H s quy i K2 1 1,05 2 1,10 3 1,15 4 5 10 1,55 15 1,95 16 2,4 1,20 1,25

Nu chnh lch nm ngoai bang trn ta co th tinh ra bng cach nhn cac h s tng ng nh trong trng hp vi R60 muc 1 phn (2). o tg cach in cun dy chiu anh hng cua du cach in trong may, nn anh gia ung mc cach in cun dy so sanh vi nha ch tao cn loai tr anh hng cua du cach in. tg cun dy = tg o - K3 (tg du 2 - tg du 1) tg cun dy la tg thc t cua cun dy may bin ap lc tg o la gia tri o c trong qua trinh thi nghim tg du 1 la tg du cach in trong may khi xut xng c quy i v nhit o tg du 2 la du c vao may tai hin trng c quy i v nhit o K3 - H s quy i phu thuc vao kt cu may co gia tri gn bng h s trong bng I-5 Bang I-5. H s quy i K3 Chnh lch nhit (oC) H s quy i K3 1 1,03 2 1,06 3 1,09 4 1,12 5 1,15 10 1,31 15 1,51 20 2,0 30 2,3

Bt k tg cac cun dy o c khi xut xng la bao nhiu nu tg o tai hin

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trng nho hn hoc bng 1% u c coi la at tiu chun. 4. o t s bin i Phi kim tra t s bin i tng u phn p ca cc my bin p. S chnh lch gia kt qu o v ca nh sn xut phi nh hn 0,5%. (T s bin p o c cc nc tng ng ca cc pha khng c sai lch nhau qu 2% : Quy trnh vn hnh v sa cha MBA)

Hnh I-4: S u ni o t s bin MBA 5. Kim tra cc tnh v th t pha Phi kim tra cc tnh, t u dy v th t pha ca cc my bin p. i vi cc my bin p mt pha, tt c cc cun dy phi c kim tra cc tnh. i vi cc my bin p ba pha, tt c cc cun dy phi c kim tra t u dy v th t pha m bo khng c s khc bit no vi cc thng s ca nh ch to. S u ni kim tra t u dy my bin p tng t nh hnh I-4 6. o in tr mt chiu cun dy in tr cun dy ca cc my bin p phi c o bng dng in mt chiu. S chnh lch gia kt qu o v cc thng s ca nh ch to phi nh hn 2%.

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Hnh I-6: S u ni o in tr cun dy MBA 7. o dng khng ti v tn tht c ti C th tin hnh in p nh mc (i vi cc MBA c nh) hoc in p thp (5-10% in p nh mc) ri tnh ton quy i hoc khng quy i m so snh vi gi tr xut xng (i cc MBA c in p 110kV tr ln, dung lng ln). Khi th ti hin trng i vi cc MBA lp t hoc vi my sa cha c thay cun dy ta ly bng 90% gi tr k trn, cn i vi cc my sau khi sa cha khng thay hoc ch thay mt phn cun dy th ly bng 85%. Nu MBA c trung tnh cch in khng hon ton th ch th cao p theo in p nh mc ca trung tnh cn ton b cun dy s c th bng in p tng cao cm ng. Ngun cao p th cn c dung lng (kVA) : P = 314.C.U2.10-9 C : in dung cun dy (pF) U : in p th (kV) Thng thng theo kinh nghim mi 10kV in p th cn 1kVA dung lng my cao p ( to 100kV cn 10kVA). Vic th cao p ch tin hnh sau khi thi gian n nh du. Sau khi th phi tin hnh th nghim khng ti in p nh mc khng ph thuc vo vic trc tin hnh th nghim ny hay cha. Vi cc MBA mi lp t v sau sa cha, dng khng ti khng c sai lch qu 30% so vi s liu tnh ton (s liu xut xng). Tn tht khng ti ca cc MBA 3 pha di 110kV v cc MBA 1 pha t 110kV tr ln khng c sai lch qu 10% so vi s liu xut xng. Tn tht khng ti ca cc MBA 3 pha in p 110kV tr ln khng c sai lch qu 5% so vi s liu xut xng. Tn tht khng ti ca 2 pha A v C i vi cc MBA 3 pha khng c sai lch qu 5%. Ch : Nu tin hnh th nghim in p thp th cn tin hnh trc khi o

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in tr mt chiu

Hnh I-7: S u ni o dng khng ti MBA 8. Kim tra du cch in Cc c tnh cch in ca du cch in my bin p phi c kim tra trc v sau khi du m bo cc c tnh ph hp vi tiu chun trong bng I-6. Bng I-6. c tnh cch in ca du cch in my bin p bn in mi 500 kV 110 ~ 220 kV Ln hn 70 kV/2,5 mm Ln hn 60 kV/2,5 mm Nh hn 10ppm. Nh hn 2,0% th tch m trong du Kh trong du Nh hn 0,5% th tch Nh hn 1,0% th tch Tng lng in tr sut axit

Ln hn Nh hn 110 kV 45 kV/2,5 mm 15 ~ 35 kV Nh hn 15 kV Ln hn 35 kV/2,5 mm Ln hn 30 kV/2,5 mm

Nh hn Nh hn 0,02 11012.cm mgKOH/g (ti 500C)

II. CC HNG MC TH NGHIM MY BIN IN P (PT) 1. o in tr cch in ca cc cun dy s cp

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Hnh II-1: S u ni o in tr cch in cun dy PT Cc in tr cch in gia cun dy vi t, v gia cc cun dy phi c o bng mgm met c in p 1.000V. Cc tiu chun i vi cc in tr theo tng loi c quy nh nh sau: (1) Loi cun dy Bng II-1. Cc tiu chun cch in cho cc cun dy ca PT (M)

Nhit du in p danh nh (kV) Cao hn 66 2035 1015 Thp hn 10 20 0C 1200 1000 800 400 30 0C 600 500 400 200 40 0C 300 250 200 100 50 0C 150 125 100 50 60 0C 75 65 50 25

(2) Loi t in v loi cun dy cch in kh in tr cch in ca cc cun dy s cp phi ln hn 50 M. (3) Loi cch in bng kh SF6 in tr cch in ca cc cun dy s cp phi khng thp hn cc c tnh ca nh sn xut. 2. o cc in tr cch in ca mch th cp v mch iu khin Cc in tr cch in gia cc mch th cp v mch iu khin vi t phi c o bng mgm met c in p 500V m bo rng cc gi tr ln hn 2M. S u ni tng t hnh II-1 3. o t s bin i Phi o t s bin i i vi tng cc ca cc my bin in p. Cc php o phi c thc hin i vi cc my bin in p ang kt ni vi cc bng iu

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khin. Bng cach t in ap thi nghim vao mch s cp ca my bin in p, phi o in p ca mch th cp ti im kim tra u vo trn bng iu khin khng nh chc chn v t s bin i v dy ni l thch hp. Tiu chun nh gi da vo cp chnh xc ghi trn PT

Hnh II-3: S u ni o t s bin PT 4. Kim tra cc tnh Phi kim tra cc tnh ca my bin in p. Mch s cp ca cc my bin in p phi c kt ni vi thit b o v sau phi kim tra cc tnh ca mch th cp. S u ni tng t hnh II-3 5. o in tr mt chiu cun dy Phi o in tr cun dy i vi tng pha ca cc my bin in p. chc chn v in tr cun dy my bin in p l thch hp. Tiu chun nh gi : Chnh lch gia PT cng loi hoc gia cc pha khng c ln hn 2 5%.

Hnh II-5: S u ni o in tr mt chiu cun dy PT III. CC HNG MC TH NGHIM MY BIN DNG IN (CT)

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1. o in tr cch in ca cc cun dy s cp

Cc in tr cch in gia cun dy v t, v gia cc cun dy phi c o bng mgm met c in p 1000 V. Cc tiu chun i vi cc in tr theo loi CT c quy nh nh sau : (1) Kiu s Bng III-1. Tiu chun in tr cch in i CT kiu s (M) Nhit du in p danh nh (kV) Cao hn 66 2035 1015 Thp hn 10 (2) Kiu s xuyn : Khng cn thit phi o in tr cch in ca cc cun dy. 2. Cc in tr cch in ca cc mch th cp v mch iu khin Cc in tr cch in ca cc mch th cp v mch iu khin phi c o bng mgm met c in p 500 V. in tr phi khng thp hn 2 M. S u ni tng t hnh III-1 3. o tg Tn hao in mi (tg) phi c o cho my bin dng lm vic vi in p 110kV hoc ln hn. Gi tr tg o c ti nhit 200C khng c vt qu cc gi tr quy nh nh Bng III-2. Bng III-2. Tiu chun i vi tg ca CT Hng mc kim tra Gi tr tn tht in mi tg% ti in p danh nh (kV) 35 110 150-220 20 0C 1200 1000 800 400 30 0C 600 500 400 200 40 0C 300 250 200 100 50 0C 150 125 100 50 60 0C 75 65 50 25

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My bin dng c du (cch in giy du) 4. o t s bin i

2,5

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1,5

Phi o t s bin i i vi tng u ni ca cc my bin dng. Cc php o phi c thc hin i vi cc my bin dng ang kt ni vi cc bng iu khin. Bng cach t dong in thi nghim vao mch s cp ca my bin dng, phi o in p ca mch th cp ti cc kim tra trn bng iu khin khng nh chc chn v t s bin i v dy ni l thch hp. Tiu chun nh gi da vo cp chnh xc ghi trn CT. Khi c yu cu c bit mi th sai s gc pha. (Tiu chun IEC 60044-1) Cp chnh xc T s dng Sai s tng i Sai s gc pha nhn hiu in so vi Im ln nht % ln nht (pht) 0,2 10 1,2 1,0 0,2 0,2 0,35 15 0,05 0,75 30 0,5 30 1,2 1,0 0,5 0,2 0,75 45 0,05 1,5 90 1,0 60 1,2 1,0 1,0 0,2 1,5 90 0,05 3,0 180 3,0 1,2 0,5 3,0 5,0 1,2 0,5 5,0

Hnh III-4: S u ni o t s bin CT 5. o cc tnh Phi kim tra cc tnh ca my bin dng in. Mch s cp ca cc my bin dng phi c kt ni vi thit b o v sau phi kim tra cc tnh ca mch th cp.

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S u ni tng t hnh III-4 6. o c tnh t ha Phi o c tnh t ha ca cc my bin dng pht hin thay i c tinh do s dch chuyn li hoc khe h cua loi. Quy nh ny ch p dng cho cc loi my bin dng c loi li tch phn chia. Cc kt qu o c phi c so snh vi cc s liu kim tra nh my ch to m bo khng c s chnh lch. Khng qui nh tiu chun, so snh vi thit b cng loi th, cn c vo yu cu ca Relay bo v m th.

Hnh III-6: S u ni o c tuyn t ha CT IV. CC HNG MC TH NGHIM MY CT CCH IN KH (GCB) 1. o in tr cch in

Hnh IV-1: S u ni o in tr cch in tip im chnh my ct (1) o in tr cch in ca ng dn s cp in tr cch in gia ng dn s cp vi t, v gia cc tip im phi c o bng mgm met c in p 1000V m bo cc in tr cch in khng thp hn 1000M. (2) o in tr cch in ca cc mch iu khin in tr cch in gia mch iu khin v t phi c o bng mgm met c in p 500V m bo cc gi tr khng thp hn 2M. 2. o in tr tip xc tip im bng dng in mt chiu

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Hnh IV-2: S u ni o in tr tip xc tip im chnh my ct (1) o in tr tip xc i vi mch s cp ca GCB Phi o c v kim tra in tr tip xc ca mch s cp m bo cc c tnh k thut ca nh ch to. V nguyn tc, phi tin hnh o i vi tng tip im. Tuy nhin, c th tin hnh o i vi tt c cc tip im trong khi nu khng th o tng tip im ring bit do cu to ca GCB. (2) o in tr tip xc ca tip im ph in tr tip xc ca tip im ph phi c o v kim tra theo ng yu cu k thut ca nh ch to. 3. Kim tra r r ca h thng du p lc iu ny ch p dng i vi cc GCB c cc c ch truyn ng bng du p lc. Phi o c v kim tra thi gian r r ca h thng p lc du, m bo cc thng s k thut ca nh sn xut. Thi gian r r l thi gian t lc khi ng li bm do r du ti khi bm dng do tr s p sut du c ci t dng bm du. 4. Th nghim ng h o p lc kh SF6 Phi o v kim tra cc p sut sau y tho mn yu cu k thut ca nh ch to: - p sut kh SF6 cnh bo v kho s vn hnh ca GCB. - p sut kh SF6 cnh bo v kho s vn hnh ca GCB c ci t li. 5. Phn tch kh SF6 Ch c phn tch kh SF6 trong GCB sau mt ngy tnh t khi kh c np y. m ca SF6 i vi tng ngn kh phi c o c v kim tra, m bo khng qu cc thng s k thut ca nh sn xut. 6. Kim tra vn hnh ng ct (1) Vn hnh ng ct bng tay Phi m bo rng khng c bt thng no trong GCB khi ng ct ba ln bng tay thao tc hoc n nt ti hin trng. (2) Kim tra vn hnh ct v ng

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Phi m bo rng khng c bt thng no trong GCB khi ng ct ba ln ti in p nh mc bng iu khin t xa. (3) Kim tra c ch t ng ct s c Phi m bo rng GCB c ct ngay lp tc v khng ng li khi c tn hiu ct s c trong sut qu trnh pht lnh ng. Sau , phi m bo rng GCB c th ng khi c lnh ng v lnh ct cng c gi n. iu ny khng p dng cho cc GCB khng c c ch hy lnh t ng ct. 7. Kim tra c tnh ng ct

Hnh IV-7: S u ni o thi gian ng m my ct (1) Thi gian ng v m ca my ct Phi o v kim tra thi gian ng, m ca my ct m bo cc thng s k thut ca nh ch to. (2) Thao tc my ct in p ti thiu Khi in p khng t vo mch s cp, phi kim tra kh nng thc hin thao tc my ct in p ca cun dy in t t gi tr nh mc n in p ti thiu. Khi , c tnh tc ng-m ca GCB khng nht thit phi tho mn cc c tnh k thut ca nh ch to. Gi tr in p thao tc ti thiu theo gi tr nu trong Bng IV-1. Bng IV-1. in p thao tc ti thiu ca GCB

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Hng mc in p ng ti thiu in p m ti thiu (3) Ba pha khng ng thi

Tiu ch 75% in p iu khin nh mc 70% in p iu khin nh mc

Thi gian ng v m ba pha khng ng thi phi c o c v kim tra p ng cc quy chun trong Bng IV-2. Bng IV -2. Tiu chun i vi ba pha khng ng thi ca GCB in p danh nh Nh hn 110 kV 110 kV v ln hn Tiu chun nh hn 0,006 giy. nh hn 0,004 giy.

(4) Thi im tac ng ca cc tip im ph Cac thi im tac ng ca cc tip im ph phi c o c v kim tra p ng cc tiu chun ca thit k. Trong trng hp thit k khng quy inh tiu chun thi kim tra p ng cc Tiu chun ca nh ch to. V. CC HNG MC TH NGHIM MY CT IN CHN KHNG (VCB) 1. o in tr cch in (1) o in tr cch in ca cc ng dn in s cp Phi s dng mgmmet c in p 1000V o in tr cch in gia s cp vi t, gia cc pha v gi tr in tr cch in phi khng thp hn 1000M. (2) in tr cch in ca cc mch iu khin in tr cch in ca mch iu khin v t phi c o bng ng h o in tr c in p 500V, gi tr in tr cch in khng thp hn 2M. S u ni tng t hnh IV-1 2. Kim tra vn hnh ng ct (1) Kim tra ng ct bng tay Phi kim tra chc chn rng khng c s bt thng no trong VCB bng cch ng ct ba ln bng tay thao tc hoc nt bm ti hin trng. (2) Kim tra vn hnh ng ct Phi kim tra chc chn rng khng c s bt thng no trong VCB bng cch ng ct ba ln ti in p nh mc bng iu khin t xa.

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(3) Kim tra c ch t ng ngt Phi xc nhn rng VCB c m ngay lp tc v khng b ng li nu lnh ct c a ra trong qu trnh tc ng ng my ct. Sau , phi xc nhn rng VCB c th ng tr li nu c lnh ng v ct c hu b. iu ny khng p dng cho cc VCB khng c c ch hy lnh t ng ct. 3. o cc thng s k thut ng m (1) Thi gian ng m tip im Phi o c, kim tra thi gian ng m tip im, m bo cc thng s k thut ca nh ch to. S u ni tng t hnh IV-7 (2) in p vn hnh ti thiu Khi khng t in p vo mch s cp, phi thay i in p ca cun dy in t v o in p nh nht khi VCB hon thnh qu trnh ng ct. Khi , c tnh tc ng - ct ca VCB khng cn tho mn c tnh k thut ca nh ch to. Phi kim tra m bo rng gi tr in p ng ct nh nht o c khng vt qu gi tr trong bng di y. Phi o, kim tra in p ng ct ti thiu p ng c cc tiu chun trong Bng V-1 sau y. Bng V-1. in p ti thiu ca VCB Hng mc in p ng ti thiu in p ct ti thiu (3) Khng ng thi ba pha Phi o, kim tra thi gian ng m khng ng thi ba pha m bo tho mn theo thit k hoc cc tiu chun nu trong Bng V-2 sau y: Bng V-2. Tiu chun khng ng thi ba pha ca VCB in p danh nh Nh hn 110 kV Ln hn hoc bng 110 kV (4) Thi im tac ng cua cac tip im phu Cac thi im tac ng ca cc tip im ph phi c o v kim tra p ng cc tiu chun ca nh ch to. Tiu chun Nh hn 0,006 sec. Nh hn 0,004 sec. Tiu chun 75% in p iu khin nh mc 70% in p iu khin nh mc

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VI. CC HNG MC TH NGHIM MY CT IN DU (OCB) 1. o in tr cch in (1) in tr cch in ca cc ng dn in s cp in tr cch in gia ng dn s cp vi t, v gia cc pha phi c o bng mgm met in p 1000V, gi tr in tr cch in l khng thp hn 1000M. (2) in tr cch in ca cc mch in iu khin in tr cch in gia mch iu khin vi t phi c o bng mgm met in p 500V, gi tr in tr cch in khng thp hn 2M. S u ni tng t hnh IV-1 2. in tr tip xc bng dng in mt chiu (1) in tr tip im chnh (s cp) OCB Phi o, kim tra cc in tr tip im s cp OCB m bo cc thng s k thut ca nh ch to. Phi o tng pha. (2) in tr tip im ph Phi o, kim tra cc in tr tip xc ca tip im ph, m bo cc thng s k thut ca nh ch to. S u ni tng t hnh IV-2 3. Kim tra vn hnh ng ct (1) Kim tra vn hnh ng ct bng tay Phi kim tra chc chn khng c bt thng trong OCB bng cch ct v ng ba ln bng tay thao tc hoc nt bm ti hin trng. (2) Kim tra vn hnh ng ct Phi kim tra chc chn khng c bt thng trong OCB bng cch ct v ng ba ln in p nh mc bng iu khin t xa. (3) C ch t ng ct Phi kim tra chc chn OCB ct ngay lp tc v khng ng tr li nu lnh ct c a ra trong qu trnh ng my ct. m bo OCB c th ng tr li khi nhn ng thi lnh ng v ct b hu b. Cc OCB khng c c ch t ct khng cn lm. 4. Xc nh thng s ng ct

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(1) Thi gian ng v m tip im, v tc ng - ct Phi o thi gian ng m tip im i vi OCB cho tt c cc cp in p. Phi o tc ng m cho tt c OCB cao hn 35kV. C hai php o phi c kim tra, m bo cc thng s k thut ca nh ch to. S u ni tng t hnh IV-7 (2) in p vn hnh ti thiu Trong trng hp khi khng t in p vo mch s cp, c in p ca cun dy in t phi c duy tr ti gi tr nh mc v in p ti thiu khi OCB hon tt thao tc phi c o bng cch thay i thng s in p. Lc ny, c tnh tc ng - m ca OCB khng nht thit phi tho mn cc c tnh k thut ca nh ch to. Phi kim tra cc gi tr o ca in p vn hnh ti thiu khng vt qu gi tr nu trong Bng VI-1. Bng VI-1. Ch tiu in p vn hnh ti thiu cua OCB Hng mc in p ng ti thiu in p m ti thiu Ch tiu 75% ca in p iu khin nh mc 70% ca in p iu khin nh mc

(3) Thi gian ng v m khng ng thi ba pha phi c o v kim tra m bo tho mn cc tiu chun nu trong Bng VI-2. Bng VI-2. Tiu chun khng ng thi ba pha ca OCB in p thng Nh hn 110 kV Ln hn hoc bng 110 kV Ch tiu Nh hn 0,006 sec. Nh hn 0,004 sec.

(4) Thi im tac ng cua cac tip im phu Cac thi im tac ng ca cc tip im ph phi c o c v kim tra p ng cc tiu chun thit k. Trong trng hp thit k khng quy inh tiu chun thi kim tra ap ng cac tiu chun cua nh ch to. 5. Kim tra du cch in Phi kim tra du cch in trc khi v sau khi vo OCB. Cc ni dung kim tra phi ph hp vi quy nh i vi du my bin p VII. CC HNG MC TH NGHIM DAO CCH LY 1. o in tr cch in

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(1) o in tr cch in ca phn dn in s cp in tr cch in gia phn dn in s cp vi t, gia cc cc cn c o bng mgm met 1000V kim tra gi tr in tr cch in khng thp hn 1000M. (2) o in tr cch in cc mch iu khin Phi o in tr cch in gia cc mch iu khin vi t bng mgm met c in p 500V, gi tr in tr cch in o c khng thp hn 2M. S u ni tng t hnh IV-1 2. o in tr tip xc bng dng in mt chiu in tr tip xc ca cc tip im mch s cp cn c o v kim tra c p ng cc yu cu k thut ca nh ch to. S u ni tng t hnh IV-2 3. Kim tra thao tc ng ct (1) Kim tra thao tc ng ct bng tay Phi kim tra chc chn rng khng c s bt thng no trong dao cch ly bng cch ng ct ba ln bng tay thao tc hoc nt bm ti ch. (2) Kim tra thao tc ng m t xa Phi kim tra chc chn rng khng c s bt thng no trong dao cch ly bng cch ct v ng ba ln ti in p nh mc bng iu khin t xa. 4. Thi im tac ng cua cac tip im phu Cac thi im tac ng ca cc tip im ph phi c o v kim tra p ng cc tiu chun ca thit k. Trong trng hp thit k khng quy inh tiu chun thi kim tra theo tiu chun cua nh ch to. 5. Kim tra kha lin ng Khoa lin ng gia li chinh cua dao cach ly v li cua dao ni t cn c kim tra m bo kha lin ng hot ng theo yu cu k thut ca nh ch tao. VIII. CC HNG MC TH NGHIM CHNG ST VAN 1. o in tr cch in Phi o in tr cch in ca chng st van. (1) o in tr cch in ca mch chnh

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Phi o in tr cch in bng mgm met 1000V. Cc in tr ny khng thp hn 1000 M. (2) o in tr cch in ca phn cch in Phi o in tr cch in ca phn cch in bng mgm met 500V theo iu kin cc u thit b dng r c tho ra. in tr ny khng thp hn 2M. IX. CC HNG MC TH NGHIM RELAY BO V i vi cac ng h o va rle bao v phai thc hanh cac thi nghim chc nng va c tinh, va kim tra tri s chinh inh rle bao v. Khi thc hanh thi nghim n chic nay, phai tach hoan toan cac mach ong ct cua rle bao v, mach may bin dong in va mach may bin in ap. - Kim tra sai s ng h o. - Kim tra im tac ng rle bao v. - Kim tra c tinh in ap va dong in. - Kim tra c tinh goc pha. - o thi gian tac ng. X. O IN TR T in tr ni t ca trm bin th cn c o v kim tra khng vt qu gi tr quy nh QT-2006. XI. S CCH IN 1. S u vo (1) o in tr cch in : so snh vi ln th trc hay cng loi. (2) o gc tn hao in mi (tg). - Khi nhit 200C tg % khng c qu tr s ghi trong bng di y: Loi s u vo Loi c du Loi c bakelit Loi bakelit matit Loi matit Loi c du Loi c bakelit Loi bakelit matit in th nh mc (KV) 35 110 154 220 3 15 6 5 4 8 5 3 8 6 4 4 6 4 3 3 2,5 4 3 2 2 2 2 -

Trong khi vn hnh Mi lp hay sau khi sa cha

19

Loi matit

3

2

2

-

(3) Th chu in th xoay chiu : in th th xoay chiu cn c vo tiu chun trong bng sau. Thi gian th 1 pht.Bng XI-1. in p th nghim chu ng Cp in p [kV] 3 6 in p th nghim [kV] 4,7 9,4 13,1 10 9,6 19,6 15 14,4 20 35 26,1 45,7 Din gii 1,5 ln in p vn hnh ln nht (3 * 1,05) [kV] 1,5 ln in p vn hnh ln nht (6 * 1,05) [kV] 1,25 ln in p vn hnh ln nht (10 * 1,05) [kV] 0,92 ln in p vn hnh ln nht (10 * 1,05) [kV] 1,25 ln in p vn hnh ln nht (15 * 1,05) [kV] 0,92 ln in p vn hnh ln nht (15 * 1,05) [kV] 1,25 ln in p vn hnh ln nht (20 * 1,05) [kV] 1,25 ln in p vn hnh ln nht (35 * 1,05) [kV] 1,25 ln in p vn hnh ln nht (110 * 1,05) [kV] 0,64 ln in p vn hnh ln nht (220 * 1,05) [kV] 0,64 ln in p vn hnh ln nht (500 * 1,05) [kV] H thng ni t Cch ly Cch ly Cch ly H thng ni t trc tip Cch ly H thng ni t trc tip H thng ni t trc tip Tt c

110

143,8 147,2 336,0

H thng ni t trc tip H thng ni t trc tip H thng ni t trc tip

220 500

GHI CH: - S u vo lp ln thng du tn hao in mi cn c vo tr s trong bng trn tng ln 1 - Loi s u vo c du: bao gm s u vo c du v s u vo c du kiu in dung l loi s dng du lm cch in ch yu. - Loi bakelit: L loi s cch in bng nhng cun giy l chnh.

20

- Loi mt tt : L loi s cch in chnh l mt tt (khng phi n thun chng m) - Loi bakelit matit: L loi s u vo kiu in dung mt tt chng m. - Khi o tg (%) cn kt hp o lun in dung ca s v so snh vi s liu ca nh ch to phn on v cc lp giy cch in bn trong. 2. S v s xuyn tng (1) o in tr cch in : Cch in ca s , s gm nhiu chic hay s treo khng c b hn 300M. (2) Th chu in th xoay chiu : in th th xoay chiu i vi tng s v loi s gm nhiu chic 35KV tr xung theo tiu chun th trong bng X-1I. in th th xoay chiu i vi mi chic ca loi s gm nhiu chic l 50KV. in th th i vi s cch in treo: S Lin X ch to v loi ch to theo kiu Lin X : Loi s cch in in th th (KV) S Trung Quc ch to: ng knh ca s cch in (mm) in th th (KV) 152 40 178 49 203 53 254 64 315 70 -2 45 -3 47 - 4,5 56 -7 65

in th th i vi s treo loi khc l 0,75 ln in th phng in kh. Thi gian th l 1 pht. Trong khi th khng c c hin tng phng in, sau khi th khng c pht nhit, nu ngc li th s khng t.

21

PHN XNG T NGa ch: 80A Trn Ph, Bo Lc, Lm ng in thoi: 0633.728171 - Fax: 0633.866457 Email: [email protected]

S: /KQTN-PXT-TTDVKT

Lm ng, ngy . thng .. nm 201..

BIN BN TH NGHIM MY BIN P.I. THNG S K THUT - Kiu - Hng sn xut - S ch to - Cng sut nh mc - in p nh mc - T u dy - Ni lp t - L do th nghim - Ngy th nghim - Nhn vin th nghim - Nhit - m : : : : : : : : : : :

II. S LIU TH NGHIM 1. o in tr cch in cun dy Loi my o : in p o : Tiu chun : i tng o R15 Cao / V (M) Cao / H (M) H / V (M)

R60

Kht

Ghi ch

2. o in tr cun dy Loi my o : Tiu chun : Gi tr sai lch gia 2 pha khng vt qu 2% a.Cun dy h Gi tr o (m) 2a-2c Sai lch ln nht gia 2 pha (%)

2a-2b b. Cun dy cao Nc 1

2b-2c

1A-N

Gi tr o (m) 1B-N 1C-N

Sai lch ln nht gia 2 pha (%)

22

2 3 4 5 3. T u dy Loi my o : Kt qu o : 4. o t s bin Loi my o : Tiu chun : Gi tr sai lch gia 2 pha khng vt qu 0.5% Nc 1 2 3 4 5 5. Th nghim khng ti MBA pha cao Loi my o : TT o 1A N 1B N 1C N 6. o Tg cun dy Loi my o : Tiu chun : H V tg (%) C (nF) Cao - H tg (%) C (nF) Cao V tg (%) C (nF) Ghi ch Voltage (KV) Current (mA) Power (W) Ghi ch KA Gi tr o KB KC Sai lch ln nht gia 2 pha (%)

S GST III. KT LUN

S UST

S GST

. . . .

Lnh o trung tm

i trng cng trng

Nhn vin thc hin

23


S: /KQTN-PXT-TTDVKT


BIN BN TH NGHIM MY BIN DNG IN (CT)I. THNG S K THUT - Kiu - Hng sn xut - S ch to - T s CT - Ni lp t - L do th nghim - Ngy th nghim - Nhn vin th nghim - Nhit - m II. S LIU TH NGHIM 1. o in tr cch in Loi my o : in p o : Tiu chun : Pha 1A 1B 1C 1N 2. o t s bin CT Loi my o : Tiu chun : Pha 1A Tn CT Gi tr o Tn CT Cao / V (M) Cao / H (M) H / V (M) : : : : : : : : :

24

1B 1C 1N 3. Cc tnh CT Loi my o : Pha 1A 1B 1C 1N 4. c tuyn t ha ca CT Loi my o : Pha 1A 1B 1C 1N III. KT LUN. . . .

Tn CT

Cc tnh

Tn CT

IKNEE (mA)

UKNEE (V)

U (I=5A)

Lnh o trung tm

i trng cng trng

Nhn vin thc hin

25


S: /KQTN-PXT-TTDVKT


BIN BN TH NGHIM MY BIN IN P (PT).I. THNG S K THUT - Kiu - Hng sn xut - S ch to - T s PT - Ni lp t - L do th nghim - Ngy th nghim - Nhn vin th nghim - Nhit - m II. S LIU TH NGHIM 1. o in tr cch in Loi my o : in p o : Tiu chun : Pha 1A 1B 1C 2. o t s bin PT Loi my o : Tiu chun : Pha 1A 1B Tn PT Gi tr o Tn PT Cao / V (M) Cao / H (M) H / V (M) : : : : : : : : :

26

1C

3. Cc tnh PT Loi my o : Pha 1A 1B 1C Tn PT Cc tnh

4. o in tr mt chiu cun dy Loi my o : Tiu chun : Pha 1A 1B 1C Tn PT Pha cao (m) Pha h ()

III. KT LUN. . . .

Lnh o trung tm

i trng cng trng

Nhn vin thc hin

27


S: /KQTN-PXT-TTDVKT


BIN BN TH NGHIM MY CT ...I. THNG S K THUT - Kiu - Hng sn xut - S ch to - in p u ngt - Ni lp t - L do th nghim - Ngy th nghim - Nhn vin th nghim - Nhit - m II. S LIU TH NGHIM 1. o in tr cch in Loi my o : in p o : Tiu chun : i tng o Pha A/V Gia 2 u ngt pha A Pha B/V Gia 2 u ngt pha B Pha C/V Gia 2 u ngt pha C 2. o in tr tip xc a. Tip im chnh Loi my o : Tiu chun : Pha A B C Kt qu o () Ghi ch Kt qu o (M) Ghi ch : : : : : : : : :

a. Tip im ph Loi my o : Tn tip im Pha A () Pha B () Pha C ()

28

3. o thi gian ng m ca my ct Loi my o : a. Thi gian ng Tiu chun : in p iu Tip im chnh khin Pha A Pha B Pha C Thi gian ng (ms) Tip im ph a Pha A Pha B Pha C Tip im ph b Pha A Pha B Pha C

b. Thi gian m Tiu chun : in p Thi gian m (ms) iu Tip im chnh Tip im ph a khin Pha A Pha B Pha C Pha A Pha B Pha C c. Thi gian ng-m Tiu chun : in p iu Tip im chnh khin Pha A Pha B Pha C Thi gian ng-m (ms) Tip im ph a Tip im ph b Pha A Pha B Pha C Pha A Pha B Pha C Tip im ph b Pha A Pha B Pha C

4. o m kh SF6 Loi my o : V tr o Gi tr nhit im sng (0C) Gi tr m (ppmv) Tiu chun Ghi ch

29

5. o tinh khit kh SF6 Loi my o : V tr o tinh khit kh SF6 (%) Ghi ch

6. Th relay p lc kh SF6 V tr o Firt Alarm (Mpa) Gi tr Gi tr tc Gi tr ci t ng reset Second Trip (Mpa) Gi tr Gi tr tc Gi tr ci t ng reset Ghi ch

III. KT LUN. . . .

Lnh o trung tm

i trng cng trng

Nhn vin thc hin

30


S: /KQTN-PXT-TTDVKT


BIN BN TH NGHIM DAO CCH LY ...I. THNG S K THUT - Kiu - Hng sn xut - S ch to - in p u ngt - Ni lp t - L do th nghim - Ngy th nghim - Nhn vin th nghim - Nhit - m II. S LIU TH NGHIM 1. o in tr cch in Loi my o : in p o : Tiu chun : i tng o Pha A/V Gia 2 u ngt pha A Pha B/V Gia 2 u ngt pha B Pha C/V Gia 2 u ngt pha C 2. o in tr tip xc a. Tip im chnh Loi my o : Tiu chun : Pha A B C Kt qu o () Ghi ch Kt qu o (M) Ghi ch : : : : : : : : :

a. Tip im ph Loi my o : Tn tip im Pha A () Pha B () Pha C ()

31

3. o thi gian ng m ca dao cch ly Loi my o : a. Thi gian ng Tiu chun : in p iu Tip im chnh khin Pha A Pha B Pha C Thi gian ng (ms) Tip im ph a Pha A Pha B Pha C Tip im ph b Pha A Pha B Pha C

b. Thi gian m Tiu chun : in p Thi gian m (ms) iu Tip im chnh Tip im ph a khin Pha A Pha B Pha C Pha A Pha B Pha C Tip im ph b Pha A Pha B Pha C

4. o m kh SF6 Loi my o : V tr o Gi tr nhit im sng (0C) Gi tr m (ppmv) Tiu chun Ghi ch

5. o tinh khit kh SF6 Loi my o : V tr o tinh khit kh SF6 (%) Ghi ch

32

6. Th relay p lc kh SF6 V tr o Firt Alarm (Mpa) Gi tr Gi tr tc Gi tr ci t ng reset Second Trip (Mpa) Gi tr Gi tr tc Gi tr ci t ng reset Ghi ch

III. KT LUN. . . .

Lnh o trung tm

i trng cng trng

Nhn vin thc hin

33


S: /KQTN-PXT-TTDVKT


BIN BN TH NGHIM CHNG ST VAN ...I. THNG S K THUT - Kiu - Hng sn xut - S ch to - in p lm vic - Ni lp t - L do th nghim - Ngy th nghim - Nhn vin th nghim - Nhit - m : : : : : : : : :

II. S LIU TH NGHIM 1. o in tr cch in Loi my o : in p o : 1000V Tiu chun : Ln hn 1000 M i tng o Kt qu o (M) Ghi ch

2. Dng in r Loi my o : in p o : 1000V i tng o Kt qu o (A)

Ghi ch

III. KT LUN. .

Lnh o trung tm

i trng cng trng

Nhn vin thc hin

34


S: /KQTN-PXT-TTDVKT


BIN BN O IN TR T TRM ...I. KT QU O L do th nghim Ngy th nghim Nhn vin th nghim Nhit - m Loi my o : : : : :

STT

V Tr o

Gi Tr o ()

Tiu Chun

nh Gi

II. KT LUN. . . .

Lnh o trung tm

i trng cng trng

Nhn vin thc hin

35


S: /KQTN-PXT-TTDVKT


BIN BN TH NGHIM S CCH IN ........I. THNG S K THUT - Kiu - Hng sn xut - S ch to - in p lm vic - Ni lp t - L do th nghim - Ngy th nghim - Nhn vin th nghim - Nhit - m II. S LIU TH NGHIM 1. o in tr cch in Loi my o : in p o : Tiu chun : i tng o u s - u o tag u s - V u o tag - V Gi tr o (M) Pha B Pha C : : : : : : : : :

Pha A

Pha N

2. o Tg s

Loi my o : in p o : Pha A B C N Utn (KV) Tan (%) Cx (pF) S o UST UST UST UST

3. Th chu in th xoay chiu Loi my o : in p o :

36

Thi gian o : 1 pht

in p th (kV)

Dng r (mA)

Ghi ch

III. KT LUN. . . .

Lnh o trung tm

i trng cng trng

Nhn vin thc hin

37

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Huong Dan Thu Nghiem Tram