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36 69kV
31
6699kkVV
Protective Relay
CTPT
DC
(345kV/161kV)
(161kV/69kV)
(161kV/11.95kV-22.8kV)
11.95kV-22.8kV/110V-220V
1
P/S
69kV
69kV/11.95kV
69kV 36
32
() 1.()() 0.7 (42 )
2.Normal Inverse Type
3. GPT 4. 10MVA87T 161KV
5.
51Z 6.345kV161kV 69kV GIS
87B 6
7. CT CT 20 10%
() 1. ANSI/IEEE Std 242-1986 0.2 0.5 0.3
2.
3.;
4.
5.
6.69KV
1
36 69kV
33
()
23.9kV 11.4kV
5151N
15
23.9kV 11.4kV
5151N
25
23.9kV 11.4kV
5151N
35
69kV
5151N
51:42
51N:10
23.9kV 11.4kV
51Z 55
2
()
(Magniude Relay)
()
()
1. 11.95kV23.9 kV
2. 69 kV
;
34
3
4 T
()
1.
(1)
(2) CTI
69kV 36
34
(3) CTI
2.(Coordination Time
IntervalCTI) (1) (2) (3) (4)
(5) 0.3~0.5
(6) ANSI CTI 0.2 ~0.5
0.3
0.3 TBack-upTMain+0.3 TBack-up TMain
5
3. (1) CB6
6 A. : Ry3 B. : Ry2 Ry1
(2) CB4 CB5
6 A.: Ry2 B.: Ry1
(3) 0.3
TRy2= TRy3+0.3 TRy1= TRy2+0.3
6
Tap
Level
10.7%
()#750(#1MTR)#760 (#2MTR)
1. CTR IFL125 MVA /1.732 69 kV
= 209.19A 209.19 1.5 = 313.8A
CT.Ratio 400/5---Y 2. CTR IFL225 MVA /1.732 11.95 kV
= 1207.88A 1207.88 1.5 = 1811.8A
CT.Ratio 2000/5--- 3.50/51
(1)51 Tap
51 209.19/(400/5)=2.61A 2.61A *1.25~1.5 =3.92A 51 Tap 40.8In
36 69kV
35
(2)51 Level 51 1173/(400/5)/4 =3.66 SPAJ140CABBLevel = 0.13 51SPAJ140C T/L = 4/0.13
(3)50 50 209.19/(400/5)10~15= 30A 50SPAJ140C 30A6In
4. 87T (1) CAABB (2)
a.400/5---Y
b.2000/5---
(3) IH = 209.19 /400/5= 2.6148A IL = 1207.881.732 /2000/5=
5.229A IL / IH = 5.229 / 2.6148 =1.9997A (4)
TL / TH = 10 / 5 = 2 CAABBTap 55.56.67.38910 Tap 5, TH=5 Tap 10, TL=10 87T CAABB5/10, Level =1.0
(5)Mismatch
M=IL/IH-TL/TH/ S* 100% IH , IL
TH ,TL
S IL/IH TL/TH M% =2.0-1.9997/ 1.9997* 100%= 0.015% M%+ %=35%
()11.95 kV 1. 51Z 51Z 7000A 1000/551Z 55 51Z Level 7000A(1000/5)2=17.5 55 CO-8(ABB) Level=550
2. 51 (1)51 Tap
51 1208/2000/5=3.02A 3.02A *1.25~1.5 =4.53A 51 Tap 40.8In
(2)51/51N Level 51 6613/2000/5/4 =4.13 SEL351SEL Level = 1.7(V.I) 51SEL351 T/L = 4/1.7 51N 7000/2000/5/4 =11.7 SEL351SEL
Level = 4.5(V.I) 51SEL351 T/L = 4/4.5 50/50N
69kV 36
36
()69kV #750-#1MTR#760-#2MTR 11.95kV 1.PF 1(Power Fuse 1)200Tie
7 PF1
2.PF1 #750-#1MTR 200Tie F#11 #760
8 PF1
36 69kV
37
3.PF2(Power Fuse2)200Tie
9 PF2
4.PF2 #760-#2MTR 200Tie F#12 #750
10 PF2
69kV 36
38
()69kV P/S#1S/S#2S/S#3S/S#750-#1MTR
1.#750-51N 200Tie
11 #3S/S #750-#1MTR
2.#750-51N 200Tie
12 #3S/S #750-#1MTR
36 69kV
39
3. P/S #620-51N
13 P/S #620-51N
4. P/S #620-51N P/S #1MTr.-#750 N-1
14 P/S #620-51N
69kV 36
40
5. P/S #620-51N P/S #2MTr.-#760 N-1
15 P/S #620-51N
()69kV P/S #4S/S#5S/S #760-#2MTr. 1.#5S/S #760-51N 200Tie
16 #5S/S #760-51N
36 69kV
41
2. #4S/S #610-51N P/S #640 N-1
17 #4S/S #610-51N
3.#4S/S #610-51N P/S #630 N-1
18 #4S/S #610-51N
69kV 36
42
4. P/S #630 51N
19 P/S #630 51N
5. P/S #630 51N P/S #750 N-1
20 P/S #630
36 69kV
43
6. P/S #630 51N P/S #760 N-1
21 P/S #630
()69kV #750-#1MTR #760-#2MTR 1.PF1(Power Fuse 1)200Tie
22 PF1
69kV 36
44
2. PF1 #3S/S #750-#1MTR N-1F#11 200Tie
23 PF1
3.PF2(Power Fuse2)200Tie
24 PF2
36 69kV
45
4.PF2 #5S/S #760-#2MTR N-1F#12 200Tie
25 PF2
()69kV P/S#1S/S#2S/S#3S/S #750-#1MTR 1.#750-51 200Tie
26 #3S/S #750-#1MTR
69kV 36
46
2.#2S/S #630-51
27 #2S/S #630
3.#1S/S #620-51
28 #1S/S #620
36 69kV
47
4. P/S #620-51
29 P/S #620
5. P/S #620-51 P/S #2Mtr.-#760 N-1
30 P/S #620
69kV 36
48
6. P/S #620-51 P/S #1Mtr.-#750 N-1
31 P/S #620
()69kV P/S#4S/S#5S/S #760-#2MTR 1.#760-51 200Tie
32 #5S/S #760-#2MTR
36 69kV
49
2.#4S/S #610-51 P/S #640 N-1
33 #4S/S #610
3.#4S/S #610-51 P/S #630 N-1
34 #4S/S #610
69kV 36
50
4. P/S #630 -51
35 P/S #630
5. P/S #630 -51 P/S#2Mtr.-#760 N-1
36 P/S #630
36 69kV
51
6. P/S #630 51 P/S#1Mtr.-#750 N-1
37 P/S #630
()
() 69kV
C.P.T
Tap Level IIT
50/51 7.0 4.5 NI 1
P/S#1MTr.161/69/11kV
#750 50N/51NCO-8 ABB 0~12A 2000/5
1.5 2 NI
50/51 7.0 4.5 NI 2
P/S#2MTr.161/69/11kV
#760 50N/51NCO-8 ABB 0~12A 2000/5
1.5 2 NI
50/51 7.0 4 NI 3
# P/S #600Tie 50N/51N
CO-8 ABB 0~12A 2000/5 1.0 4 NI
4 P/S#1MTr.161/69/11kV#1750~#750
51NT CO-8 ABB 0~12A 1200/5 1.5 5.5 NI
5 P/S#2MTr.161/69/11kV#1760~#760
51NT CO-8 ABB 0~12A 1200/5 1.5 5.5 NI
50/51 5=1In 0.49 NI 6
# P/S #620 50N/51N
SEL- 311L SEL 0~12A 2000/5 1=0.2In 0.48 NI
50/51 5=1In 0.54 NI 7 #1S/S #610
50N/51N
SEL- 311L SEL 0~12A 1200/5 1.5=0.3In 0.42 NI
50/51 5=1In 0.48 NI 8 #1S/S #620
50N/51N
GRL- 711P TOSHIBA 0~12A 1000/5 1.5=0.3In 0.38 NI
50/51 5=1In 0.38 NI 9 #2S/S #620
50N/51N
GRL- 711P TOSHIBA 0~12A 1000/5 1.5=0.3In 0.29 NI
50/51 5=1In 0.28 NI 10 #2S/S #630
50N/51N
GRL- 711P TOSHIBA 0~12A 1000/5 1.5=0.3In 0.2 NI
50/51 5=1In 0.18 NI 11 #3S/S #630
50N/51N
GRL- 711P TOSHIBA 0~12A 1000/5 0.5=0.1In 0.18 NI
50/51 4=0.8In 0.13 30 NI 12 #3S/S #750-#1MTR
50N/51NSPAJ140C ABB 0~12A 400/5
0.5=0.1In 0.05 10 NI
50/51 5=1In 0.22 NI 13
# P/S #630 50N/51N
SEL- 311L SEL 0~12A 2000/5 1=0.2In 0.24 NI
50/51 5=1In 0.22 NI 14
# P/S #640 50N/51N
SEL- 311L SEL 0~12A 2000/5 1=0.2In 0.24 NI
67 5=1In 0.05 NI 15 #4S/S #630
67N
SEL- 311L SEL 0~12A 1200/5 1=0.3In 0.05 NI
67 5=1In 0.05 NI 16 #4S/S #640
67N
SEL- 311L SEL 0~12A 1200/5 1=0.3In 0.05 NI
50/51 5=1In 0.24 NI 17 #4S/S #610
50N/51NGRL-711P TOSHIBA 0~12A 800/5
1.5=0.3In 0.21 NI
50/51 5=1In 0.15 NI 18 #5S/S #620
50N/51NGRL-711P TOSHIBA 0~12A 800/5
0.5=0.1In 0.18 NI
50/51 4=0.8In 0.13 30 NI 19 #5S/S #760-#2MTR
50N/51NSPAJ140C ABB 0~12A 400/5
0.5=0.1In 0.05 10 NI
38
69kV 36
52
11.95kV
C.P.T
Tap Level IIT
1 #3S/S
#750#110#1MTR
51Z CO7 ABB 0~12A 1000/5 2 5 NI
2 #5S/S
#760#120#2MTR
51Z CO7 ABB 0~12A 1000/5 2 5 NI
50/51 4=0.8In 1.7 VI3
#750#11011.95kV
50N/51N
SEL351 SEL 0~12A 2000/51.5=0.3
In 4.5 VI
50/51 4=0.8In 1.7 VI4
#760 #12011.95kV
50N/51N
SEL351 SEL 0~12A 2000/51.5=0.3
In 4.5 VI
50/51 5=1In 0.7 VI5
#110~#120BUS
200Tie 50N/51NSEL351 SEL 0~12A 2000/5
1.5=0.3In 2.8 VI
50/51 5=1In 2.5 14In EI6
F#11#11011.95kV
50N/51N
SEL351 SEL 0~12A 600/51.5=0.3
In 5 EI
50/51 5=1In 2.5 14In EI7
F#12#12011.95kV
50N/51N
SEL351 SEL 0~12A 600/51.5=0.3
In 5 EI
8 PF1 POWERFUSE PF125E
9 PF2 POWERFUSE PF125E
[1] J.L.Blackburn . Applied Protective Relaying
[2] 88
[3]ASPEN
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