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BV rle v t ng ha GV: NG TUN KHANH 1

Company

LOGOGV : NG TUN KHANH

i hc quc gia Tp.HCM

Trng i hc Bch Khoa Tp.HCM

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TI LIU CHNH

Cc file power point mn hc BVRL ng Tun Khanh Bo v rle &TH Nguyn Hong Vit Gio trnh bo v rle (1999) Trn Hu Thanh Tnh ton ngn mch v chnh nh bo v r le v

trang b t ng trn Hong Hu Thun Bo v rle &TH L Kim Hng v on Ngc Minh T Cc ti liu khc: ti liu nc ngoi

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1. ND 1: TNG QUAN2. ND 2: CH LM VIC CA IM TRUNG TNH3. ND 3: GIN VECTO CA CC DNG S C4. ND 4: KH C IN O LNG5. ND 5: BO V QU DNG IN6. ND 6: BO V QU DNG IN P-H S C CHM T7. ND 7: BO V DNG IN C HNG8. ND 8: BO V SO LCH9. ND 9: T NG LI10. ND 10: HA NG B11. ND 11: BO V MY BIN P12. ND 12: BO V NG C13. ND 13: BO V MY PHT14. ND 14: BO V THANH GP15. ND 15: BO V NNG CAO TNH N NH

NI DUNG

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Trong vn hnh HT c th xut hin tnh trng s c haych lm vic khng bnh thng ca cc phn t. Lcny, hin tng l dng in tng cao nhng in p lithp.

Nh vy mun HT hot ng bnh thng tr li th HTphi c h thng bo v rle pht hin s c v c lp ncng nhanh cng tt.

ND 1: TNG QUAN

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Nhim v bo v r le

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1.1 LCH S BO V R LE

1.2 CC DNG S C TRON HT

1.3 CC YU CU

1.4 M S R LE

1.5 S MU

1.6 NH SN XUT

ND 1: TNG QUAN

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S dng nguyn tc in t

S dng nguyn tc cm ng

S dng linh kin bn dn, vi mch

S dng k thut vi x l

1.1 Lch s r le

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K thut ch to rle

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Thi gian va qua chng kin bao thay i to ln trongcng ngh ch to rle bo v.

Rle in c rle tnh

Rle digital rle numerical

Mi th h rle u c ci tin v kch c v cc chcnng, cp tin cy khng ngng c nng cao.

1.1 Lch s r le

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1.1 Lch s r le

Relay in c

y l th h rle u tin dng cho h thng in, c lch s gn 100 nm. Loi rle ny lm vic trnnguyn l in c, lc in ng tc ng lm c cuhot ng khi c tc nhn kch thch...

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1.1 Lch s r le

Relay tnh (Static relay)

Thut ng tnh ch rng rle loi ny khng c cc bphn chuyn ng. Trong phm vi bo v, khi nim "tnh"mun ni ti vic khng c phn chuyn ng to ccc tnh ca rle.

Rle tnh c gii thiu vo u thp nin 60. Thit kca n da trn nhng thit b in t tng t thayth li st v nam chm to ra ng c tnh ca rle.

Mi rle loi ny ch yu vn b gii hn trong 01 loi bov. c th bo v a chc nng, ngi ta phi ni nhiuhp rle li vi nhau. 10

1.1 Lch s r le

Lp trnh cho rle tnh cng gii hn vi mt vi hm cbn iu chnh ng c tnh ca rle.

Nh vy, rle tnh l s thay th cc phn in c bngmch in t tng t, vi mt vi thit lp thun tin hn,tit kim hn v khng gian

Relay tnh (Static relay)

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1.1 Lch s r le

R le k thut s (Digital relay)

S ra i ca Digital relay l s pht trin mi trong bo v rle. Vi x l v vi iu khin thay th nhng mch in tngt dng trong rle tnh thc thi cc chc nng.

Nhng digital relay u tin c a vo khong nhng nm80, v vi s ci thin khng ngng kh nng ca n, n naydigital relay vn c coi l cng ngh hin i cho rt nhiung dng.

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1.1 Lch s r le

So vi rle tnh, digital relay a vo b chuyn i tngt/s cho mi i lng tng t o c, s dng vi x l thc thi cc thut ton bo v.

Digital relay c th thit lp thng s rng hn v chnhxc hn rle in c hay rle tnh. N c th giao tip vicc my tnh iu khin

R le k thut s (Digital relay)

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1.1 Lch s r le

R le k thut s (Numerical relay )

S khc bit gia digital relay v numerical relay nm trnquan im hon thin v cng ngh ch khng phi nguyn l bo v. C th xem y nh mt s pht trint nhin ca digital relay nh mt kt qu ca s tin btrong cng ngh.

Chi ph vi x l v cc thit b s lin quan (b nh, cng ravo,...) ngy cng gim, dn n vic tip cn cngngh ny theo cch s dng mt thit b phn cng n x l mt lng ln cc chc nng (one-box solutionapproach).

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1.1 Lch s r le

S dng b vi x l a chc nng cung cp cho rlekh nng tnh ton cn thit i vi mt s lng ln ccchc nng m trc y c thc thi trong cc phn tphn cng ring bit. Tt c ch gi gn trong mt phncng.

Chnh v vy ch cn mt li ca numerical rle cng c thlm cho rt nhiu chc nng b ko theo, iu ny khc vivic cc chc nng khc nhau c thc thi bi cc thit bring

R le k thut s (Numerical relay )

S c: Ngn mch N(3) , N(2) , N(1) , N(1,1) , ngn mch ccvng dy trong MBA, ngn mch gia cc vng dy trongmy pht in.

Trng thi khng bnh thng: Qu ti, qu p, gimtn

Nguyn nhn:

Do cch in gi ci Thao tc sai, nhm ln

1.2 S c v trng thi khng bnh thng

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1.3.1 Tnh chn lc1.3.2 Tc ng nhanh1.3.3 nhy1.3.4 tin cy1.3.5 Kinh t

1.3 Cc yu cu chnh

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Tnh chn lc: Khi phn t no b s c hay h hng th bov rle ch cn loi b phn t .

1.3.1: Tnh chn lc

V d:

CB1 CB2~

A B C

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TripNo trip

Tc ng nhanh: m bo tnh n nh ca cc my pht lm vicsong song trong HT. Gim tc hi ca dng ngn mch n cc thitb, gim xc sut gay h hng nng hn, nng cao hiu qu t ng li.

Thi gian ct = T relay + T CB

V d:ng dy 300 500 Kv: 0.1 0.12 sng dy 110 220 Kv: 0.15 0.3 s

ng dy 6 10 Kv : 1.5 3 s

Cng xa ngun cng t nh hng n tnh n nh ca HT

1.3.2: Tc ng nhanh

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nhy:

c trng nhy: Knh khong 1.5 2.0

Theo dng in ngn mch:

Theo in p ngn mch:

minNMnh

kd

IK I

max

kdnh

N

UK U

1.3.3: nhy

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tin cy:

Khi c s c trong vng BV th BV phi tc ng chcchn. Nhng n khng tc ng i vi cc s c m nkhng c giao.

bo v tin cy cao cn phi dng cc s n gin,gim s lng rle v cc tip xc, cu to n gin, ch lp rp bo m cht lng ng thi kim tra, botr thng xuyn.

1.3.4: tin cy

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Kinh t:

Phi la chn ph hp yu cu lun m bo gi thnh phi chng.

1.3.5: Kinh t

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K hiu Tn gi K hiu Tn gi

21 BV khong cch 47 BV th t pha

21N BV khong cch chng chm t 48 BV mt gia tc

24 BV qu t 49 R-S BV nhit Rto Stato

25 BV ng b 50/50N BV qu dng in ct nhanh

26 BV du 51BF BV h hng my ct

27 BV thp p 51G BV qu dng chng chm t

30 BV ch th vng bo v 51GS BV qu dng chng chm t S

32F BV nh hng cs th t thun 51/51N BV QDCC thi gian tr

32R BV nh hng cs th t nghch 51V BV QD c kim tra in p

33 BV ch th mc du thp 52 My AC

37 BV dng in thp v cs thp 59 BV in p

40 BV pht hin mt kch thch MF 59N BV in p th t khng

46 BV dng in th t nghch 60 BV cn bng dng v in p

1.4 M r le / k hiu

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K hiu Tn gi K hiu Tn gi

62 Rle thi gian 86 Rle ct v kha my ct

63 Rle p sut 87 Bo v so lch

64 Rle chng chm t 87G Bo v so lch my pht

64R Rle chng chm t Rto 87T Bo v so lch my bin p

67 Rle dng nh hng 87B Bo v so lch thanh ci

67N Rle dng nh hng chng c 87N Bo v so lch chng chm t

74 Rle xa gim sat mch ct 90 Rle iu ha in th

76 Rle qu dng in DC 92 Rle nh hng cs v in p

78 R le MB hay o gc lch pha 95 Rle pht hin t mch th cp BI

79 T ng li 96 Rle hi

80 Rle pht hin mt ngun DC

81 Rle tn s

85 Bo v tn s cao, pilot

1.4: M rle / k hiu

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Bo v ng dy

1.5 S bo v mu

i vi ng dy t 220KV gm c cc bo v chnh : 87L,21, bo v d phng: 21, 67/ 67N, 50/ 51, 50/51N.

i vi ng dy t 66KV -110KV gm c cc bo v chnh :21, bo v d phng: 67/ 67N, 50/ 51, 50/51N.

i vi ng dy 15KV-23KV khng c ngun diesel: ch cnbo v 50/51, 50/51N.

i vi ng dy 15KV-23KV c ngun diesel cn c r lequ dng c hng 67/67N.

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Bo v thanh ci

1.5 S bo v mu

Bo v chnh: 87Bus,

Bo v d phng: 50/51, 50/51N

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Bo v my bin p:

1.5 S bo v mu

Bo v chnh : R le 87T

R le 96 (R le hi): R le ny t ng ni gia thng du chnh vthng du ph. Khi c s c bn trong my bin th, mt lng hi sinhra i qua r le ny. Ty theo mc s c nng hay nh m r le i botn hiu hay a tn hiu i ct my ct. Nhng s c nghim trng s gyra mt xung du v pha bnh du ph lm r le tc ng ct my ct ngaytc th.

Ngoi cc r le trn cn c cc r le mc du thp, r le nhit du , rle nhit cun dy, r le p lc (r le ny o tc thay i p lctrong du).

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Bo v my bin p:

1.5 S bo v mu

Bo v d phng:

R le qu dng chm pha, chm t pha cao (51P, 51NP) v h (51S, 51NS) ca my bin th

R le qu dng th t khng ly tn hiu t bin dng in trung tnh pha cao my bin th (51 GNP ) hay trung tnh pha h my bin th (51GNS).

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ABB: BV khong cch REL 511, REL 521, REL 670; BV solch RET 521, SPAD 346, RED 5213C; BV qu dng SPAJ140C, SPAA 341C, SPAS 348C, REF 54, REF 610, REX521Siemens: BV khong cch 7SA511, 7SA513, 7SA522; BVso lch 7UT512, 7UT513, 7UT612, 7UT613, 7SS522,7SS523; BV qu dng 7SJ511, 7SJ611, 7SJ622, 7SJ 64,7SJ635, 7SJ600ALSTOM: BV khong cch EPAC 3000, EPAC 3522,MICOM P441, P442, P443, P437, LFZP 111; BV so lchKBCH 120, 130, 140, P632, P633, P634, LFCB 122,P543,DIB CL; BV qu dng P120, P122, P123, P127,P141, KCGG 140, KCEG 142

1.6 Nh sn xut

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SEL: BV khong cch SEL 311L, SEL 421, SEL 321, SEL311C ; BV so lch SEL 387, SEL387E, SEL487; BV qudng SEL551, SEL351,SEL451

TOSHIBA: BV khong cch GRZ; BV so lch GRT, D2L7E,D2B; BV qu dng TCO 29S, GRD140

1.6 Nh sn xut

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