161kV 變電所地網接地電阻設計 - engh.kuas.edu.t · PDF...

810820
161kV
1 1 2 1
2
E-mail :[email protected]
IEEE Std.80-2000
ETAP CYME
1.
IEEE Std.80 2000 [1]
IEEE Std.80 1961 [2] 1976 [3]1986
[4] 2000 IEEE Std.80 1961 1976 1986
[5] 1986 2000
[6]
IEEE STD.80
2.
2.1
50/60Hz
500 3000IEEE Std 80-2000
RB=1000
50/60Hz
(RI2T)(Ventricular fibrillation)
2010 National Kaohsiung University of Applied Sciences, ISSN 1813-3851

161kV 811
SB=( IB) 2TS (1)
IB (Tolerable body current)
(A)TS (sec)SB 99.5%
/(J/)
(1) SB 50 Dalziel
SB=0.0135
SS
BB TT
SI 116.050 == (2)
(2) TS=0.1sec IB50=367mA TS=1sec IB50=116mADalziel 70
SB=0.0246
SS
BB TT
SI 157.070 == (3)
(3) TS=0.1sec I B70=496mA TS=1sec I B50=157mA
50 (2)
1
345kV 5.5 (
0.1 )161kV 12 (0.2 ) 0.5
1
50 (SB=0.0135) 70 (SB=0.0246)
(TS) 0.1s 0.5s 1s 3s 10s 0.1s 0.5s 1s 3s 10s(IT) 367mA 164mA 116mA 67mA 37mA 496mA 222mA 157mA 90mA 50mA
2.2 (Step voltageEs)
1 1
2
150~180 60
2.3 (Touch voltage) (Et)
GPR

812
2.4 (Transfered voltageEtrrd)
1
GPR
(Transferred voltage)Etrrd
GPR
1
3. ETAP CYME
3.1 ETAP(Electrical Transient Analysis ProgramETAP)(Operation
Technology Inc.OTI)
3.1.1 (1)(2)(3)(4)(5)
(6)(Ground grid Design)
3.1.2
3.1.2.1
3.1.2.2
3.1.2.3
3.1.2.4
3.1.2.5
3.1.2.6
3.2 CYME- PSAFCYMGRD(Substation Grounding)
3.2.1 (Substation grounding grid)
3.2.1 CYMGRD
MS Windows(R)(Danger point)

161kV 813
3.3 IEEE
3.3.1
69/11.4kV 30MVA
Y 11.4kV 0.02+j0.5
Zt1=Zt2=Zto=0.01+j0.25 69kV
Zs1=Zs2=0.107+j2.14 Zso=1.5+j12.86 Tf
TS TC 0.5
3.3.2 IEEE
IEEE-80 2
1
A=63m84m=5292m2
=120 m
2
69kV Xo>X1
( )A
XXE
IIo
foLg 697286.1214.223
6900032
33
169 =
+
=+
==
11.4kV
Z1=(11.4/69)2Zs1+Zt1=(11.4/69)2(0.107+j2.14)+(0.01+j0.25)=0.013+j0.308 Zo=Zto=0.01+j0.25 ( -Y )11.4kV Xo 11.4kV
4.11LLgI 69LgI 4.11LLgI
Ta= X /120R=(0.308+20.25)/120(0.013+20.01)=0.065sec
063.1)1(5.0
065.01)1(1 065.05.022 =+=+= eeTTD af TT
f
af
AIDI LLgfF 2597724437063.14.11 ===
40 1084 IEEE STD.80-2000 11.3.1.2
Kf [1]
Akcmil = 5.006.7977.25 =CfF TKI =129.7kcmil=65.7mm

814
80mm2( d=0.0115m)
150mm2
3
hs=0.15m
s=3000.m
78.009.015.02
3000120109.0
109.02
109.01 =
+
=+
=S
SS h
C
N O
N O
N O
Y E S
Y E S
Y E S
1
2
3 E t o u c h E s t e p
4
5 R g
6 I G
7 I G R g < E t o u c h ?
8 E M E S
9 E M < E t o u c h ?
1 0 E S < E s t e p ?
1 2
1 1
2
50 IEEE STD.80-2000 8.3
Etouch=(1000+1.50.783000)0.116 5.0/ =739.9V
Estep=(1000+60.783000)0.116 5.0/ =2467V

161kV 815
4
A=63m84m IF=25977A
5
D=7m
LC=1363m+1084m=1659m
d=0.0115m( a=0.00575m)
h=0.5m
Lr=10m
b=(5/16)inch=0.00794m
nR=38
LR=3810m=380m
LP=2(63+84)m=294m
3
5
IEEE STD.80-2000 14.3 a'= 2ha =0.0758k1 k2 IEEE-80-2000 [1] k1=1.2k2=5.0
R1=
+
2C1C
C
kALk
a'2Lln
L =
+
5
529216591.2
0.075816592ln
1659120 =0.761
R1 R2
Rm=
++
1k
ALk
L2Lln
L
2C1
r
C
C
=
+
+
15
529216591.2
1016592ln
1659120 =0.672
Rg=(R1R2-R2m)/(R1+R2-2Rm)=(0.7610.821-0.6722)/(0.761+0.821-20.672)=0.728
6 2 (24437A)> (6972A) 11.4kV
Y 69kV
Sf =0.669kV
4.11LLgI 69LgI

816
Ta= X /120R =(22.14+12.86)/120(20.107+1.5)=0.02653sec
0262.1)1(5.0
02653.01)1(1 02653.05.022 =+=+= eeTTD af TT
f
af
IEEE STD.80-2000 15
IG =CpDf Ig =CpDf Sf If =11.02620.66972=4293A
7
5 6
GPR=IGRg=42930.728=3125V
3 Etouch=739.9V 12
8
IEEE STD.80-2000 16.5
n=nanbncnd =(2LC/LP) A4LP 11=(21659/294)( 52924294 )=11.35
Km Ks Ki
Km= ( )( )
+
++
12n8ln
KK
4dh
8Dd2hD
16hdDln
21
h
ii22
( )
+
+
=0.011540.5
0.0115780.527
0.01150.5167ln
21 22
( )
+
+111.352
8ln0.51
121 =0.745
Ks= ( )
+
++ 2n0.51
D1
hD1
2h1
1 = ( )
+
++
235.110.51
71
5.071
0.521
1 =0.406
Ki=0.644+0.148 n=0.644+0.14811.35=2.324
LM=LC+LR(1.55+1.22Lr / 2y2x LL + )=1659+380(1.55+1.2210/
22 8436 + )=2292m
Ls=0.75LC+0.85LR=0.751659+0.85380=1567m
EM M
im
LKK GI =1200.7452.3244293/2292=389.2V
ES =s
is
LKK GI =1200.4062.3244293/1567=310.2V

161kV 817
9
EM=389.2V Etouch=739.9V
10
ES=310.2V Estep=2467V 12
11
EM

818
potential) 10
10
4. IEEE ETAP CYME
270.0
25
50
75
Y (m)
2400
2500
2600
2700
2800
2900
Volts
25 50 75
X (m)
Absolute Potential Profile
270.0
25
50
75
Y (m)
0
100
200
300
400
500
Volts
25 50 75
X (m)
Touch Potential Profile
270.0
25
50
75
Y (m)
0
100
200
300
400
500
Volts
25 50 75
X (m)
Touch Potential Profile
4 5 6
7

161kV 819
8
(a) (b)
9 (Step potential)(Touch potential)
Vol
tage
(V)
Distance(meters)0 33.47 66.95 100.4 133.9
-227
1137
454
2501
1819
Vol
tage
(V)
Distance(meters)0 33.47 66.95 100.4 133.9
-227
1137
454
2501
1819
10

820
[1] IEEE Std. 80, IEEE Guide for Safety in AC Substation Grounding, 2000. [2] AIEE No. 80, AIEE Guide for Safety in A-Current Substation Grounding, 1961. [3] IEEE Std. 80, IEEE Guide for Safety in AC Substation Grounding, 1976. [4] IEEE Std. 80, IEEE Guide for Safety in AC Substation Grounding, 1986. [5] Sverak, J. G., Progress in step and touch voltage equations of ANSI/IEEE Std 80 - historical perspective, IEEE Trans. Power
Del., vol. 13, no. 3, pp. 762-767, July 1998. [6] Ma. J., Dawalibi, F. P . and Southey, R. D., Effects of the changes in IEEE Std. 80 on the design and analysis of power
system grounding, Proc. Power Conf., vol. 2, pp. 974-979, Oct. 2002. [7] 2000 [8] 2004

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