transmission line 132 kv aa
DESCRIPTION
aaTRANSCRIPT
:
1. Suspension Towers))
(String Insulator) (80%) .
2.
Tension angle terminal Towers) )
:
. (20) .
. (65) .
.
3. ( Crossing Towers)
(Anchor Towers) .
4. (Anchor Tower)
Up-Lift Forces) ) .
, Basic Span .
:1. Basic Span = 300 m
2. EDS (Every day stress) = 4.5 KG/mm2 at 23C3. Min. electrical clearance to ground at 75 C = 6.0 meter
4. Conductor 210/35 ACSR.
Weight of conductor W = 0.85 KG/m
Cross sectional area A = 243.2 mm2 Specific weight at still air g 1 = 3.495 10-3 kg/m/mm2 Specific weight at (-5 C + ice) g2 = 6.826 10-3 kg/m/mm2 Specific weight at (15 C + wind) g w = 7.171 10 -3 kg/m/mm2 Modules of elasticity E = 7700 kg/mm2
B =1/E = 130 10 -6 mm2/kg
Coefficient of liner expansion a = 19.2 10 -6 Weight of conductor with ice W i = 1.66 kg/m
1. :
2. Sag and tension at (75 C ) for basic span equal to 300 m.
3. Sag and tension at (50 C ) for basic span equal to 300 m. And max. Electrical Span = Conductor 390 meter.
4. Sag and tension at (15 C + wind ) for basic span equal to 300 m.
5. Sag and tension at (- 12 C ) for basic span equal to 300 m.
6. Sag and tension at (- 5 C + ice ) for basic span equal to 300 m.
(1-1)
32U1
b-b(b1- -w) =U2..(1-5)
22b21
22
U1=(S1)(g1)
24 B
22
U2=(S2)(g2)
24 B
W=a(t2 t1)
B
2
d = sag =(s) g2
8 b2
ACSR 210 / 35
EDS = 4.5 kg/mm2 at 23CBasic span = S = 300 m
S = Max. Span = 1.3 S = 390 m
50
S= 300 75
S=300 15+S=300 -12
S=300 -5+
S=300 50
S=390m
/24.13.88.325.238.754.24
9979242023127221301031
9.610.359.77.58.7615.67
(1-1)
().
(Max Gust of wind) (10) (50) (10) (35\)
h o = = 10
Vo = = 35 \
:
e
Vh = V0(h) ..(1-1)
h 0
h =
Vh = (h)
e= (0.09) :
2
P =1 n V
2h
h
n = = 1.25 \ 3 (10) (1-1) (1-2) :
0.18
P h= 766 (h).(1-3)
10
h (10) .
(1-3) (C r) ( Wind Span) )).
- Sn (100) C r = 0.8
- Sn (300) C r = 0.6
n S (100) (300) Cr (C r = 0.8) 33..
Pc = Ph Cr.(1-4)
(33 . ) (140)\ (25-30) ) (1-3 (75) \2.
(Design hight) (Conductor) (G.L.) (33) . .(75) (Max. sag) .
Design hight (D.H.) = Min. clerance to ground + Max. Sag.
(S- wind Span)
(Transverse Load) :
S1+S2
Sn = Meter (1-6)
2
S2 , S1)) (T2) (1-1)
(S-wight Span) (Vertical Load) (Tem Plate) :
Sg = Sn +T(h1+h2)..(1-7)
gS1S2
S n =
T = - .
h = .
g = (Specific Wight) .
(S- Max. electrical Span) (50) .
as= Kd+L+V.(1-8)
150
d = (50)
L =
K = .
K = 0.85 (120/20) .
K = 0.75 (210/35) .
V = (KV) (Equivalent Span) :
3333
S+S+S...S
Se=123i
S+S+S...S
123i
(q- Swimging Angle) (String Insolator) (0.35) (Vertical Loads) (Tranvers Loads) :
+W wi
tan q =T L2
VL
+W Si
2
(q) (TL) (Sn) (VL) (Sg) (Sg) ( Wind Span) ) .
W wi = .
Wsi = .
(Min. Spacing Between Conductors)
Max. Electrical Span (50) :
as=kD + L k+V
150
50c
d = (50) (Sn) (1.3 ).
( (Vertical Load VL
V L=(S g W) +Wsi + G .(2-11)
Sg = Weight Span
W =
W si = .
G = (100) .
((Transvers Load-TL (Angle Pull) :
TL = CPDSn + Wn + ( T1 + T2) sin n/2 ..(1-12)
C = (1-1.2) .
P = 33 . (25) (140) \ (P) (75) \2.
n = .
D =
S = (Wind Span)
Wn = (25) (30) .
T1 = (Kgf)
T2 = Kgf))
.
(Sag and tension Template) .
(Equivalent Span) (Parameter) .. (Parrabola) :
Y=(2-1)
X2
2p
X= S (half of span)
1
2
T = Tens in conductor at that condition in Kgt
W = Wight of conductor per unit length Kg/m
(75) (Up-lift) (-12) (-8) .
:
b 1 = E D S = 4.5 kg/mm2
t 1 = 23 C
t 2 = 75 C for Min. clerance to grand
t 2 = -12 C for Up lift
(U2) :
b3 - b2(b1-U1-w)=U2
22b2
1
(1-1) (Parmater) (Parabola) (X, Y) (2-2) (2-3).
(2-1)
Tension at 75 CEquivalent Span MetersTension KgfParameter
135666784
140681801
145696819
150708833
155717844
160730858
165739869
Tension at -12 C
Equivalent Span MetersTension KgfParameter
13518142134
14017852100
14517562066
15017272032
15516991999
16016711966
16516441934
Y=X2 Catanry Tem- Plate at 75C
2p
E.S=135
P=784E.S=140
P= 801E.S=145
P=819E.S=150
P=833E.S=155
P= 844E.S=160
P=858E.S=165
P=869p.average=823
p=825
XYXYXYXYXYXYXYY.avrrgeYe
501.591.561.531.51.481.461.441.511.51
1006.386.246.116.005.925.836.756.036.06
15014.3514.0513.7413.5113.3313.1112.9513.5813.64
20025.5124.9724.4224.0023.7023.3123.0224.1324.24
25039.8639.0238.1037.5237.0336.4235.9637.7137.88
30057.4056.1854.9554.2053.3252.4551.7854.3354.55
35078.1376.4774.7973.5372.5771.3970.4873.9174.24
40002.0499.8697.6896.0494.7993.2492.0696.5396.97
45029.1526.4023.6321.5519.6718.0016.51122.13122.73
(3-3)
Y=X2 Catanry Tem- Plate at -12C
2p
E.S=135
P=2134E.S=140
P= 2100E.S=145
P=2066E.S=150
P=2032E.S=155
P= 1999E.S=160
P=1966E.S=165
P=1934p.average=823
p=2025
XYXYXYXYXYXYXYY.avrrgeYe
500.580.590.610.620.630.640.650.610.62
1002.342.382.422.462.502.542.562.462.47
1505.275.365.455.545.635.725.825.565.56
2009.379.529.689.8410.0010.1710.349.859.88
2504.6414.8815.1315.3815.6315.9016.1615.3915.43
30021.0921.4321.7822.1522.5122.9023.2722.1622.22
35028.7029.1729.6530.1430.6431.1531.6730.1630.25
40037.4938.0938.7239.3740.0240.6941.3739.3939.51
45047.4548.2149.0149.8350.6551.5052.3549.8650.00
(3-3)
USING OF CONTER WEGHT IN THE DESIGN OF POWER TRANSMISSION LINES
( ) :
1. Up lift forces 2. Swing angle of string insulator 3. Side Slope 4. Down Pull forces (Counter Wight)
( (Wight Span ( (Wind Span ( ) (Up lift) ( - ) ( ) ( ) ( ) ( ) .
( ) ( ) :
Level Span))
( (Weight Span ( (Wind Span :
Wind Span = Weght Span =S1 +S 2
2
(Up lift) .
( (Wight Span
1. :
.
2. (Lowest Point on catenary) ( (Wight Span :
() (S rs = S is) Up lift .
. ( (Wight Span ( ) (Up lift) :
Up lift (Counter wight) (String Insolator) .
V=V1+ V2 =WS1+ S2-T(H1+H2((3-1)
2S1S2
V = KgfS =
H = ( ) .
W = \ .
T = -12 -8 .
.
Side Slope) )
Center Line (Swinging Angle) , .
(Down Pull Forces)
(- ) ( ) :
V=V1+ V2 =WS1+ S2+T(H1+H2((3-2)
2S1S2
33.
.
.
( ( Crossing Span Anchor Towers () .
Type of TowerDesign Hight meterSpacing
Bet. Con.Wind Span mWight Span mMax.Elec. Span meterDesgn Load
Hor. Met.Ver. Met.VLKgTLKgLL
Kg
S2/2RC54.64.845.0591102063017959262090
S1/RC54.08.206.636865086011825873000
S1/AT24.254.64.4210310550618348300
(4-1)
ACSR 210/35
W0 =0.85 kg/m
W2 = 1.66 kg/ m
kg/m/mm2 10 -3 g0 = 3.495 kg/m/mm2 10 -3g 1 =7.17
kg/m/mm2 10-3 g2= 6.826
A = 243.2 mm2 R =0.0203 m
a = 19.2 10 -6 Thermal expansion coefficient of conductor material
B =130 10 -6 mm2/kg =1/E
Where E = Modulus of elasticity =7700
:
(Max. Tension) = 2100 (-5) (-5 + ICE)
b1 = 8.63 \ 2.
.
:
Se =(240)3++(700)3++(250)3= 559.3 =559 m
240700250
(4-1) :
1. (23) S2/2RC S1/RC .2. (23) (470475) S1/RC S2/2RC 3. (12) S2/2RC . : (75) .
(50) . (15) (75) \ 2 . (- 5 ) ( ). (-12) . :
3b22b2u
-(b1-1-w) =U2 (4-1)
b2
1
2
U1=(Se)2g1
24 B
2
U2=(Se)2g2 g2
24 B
W =a(t2 t1)
b
d = Sag =(s) 2 g2(4-2)
8 b2
(4-2)
(700)
50 75 +15
-2 + 5
/24.34.188.854.628.63
10461017215211242100
49.851.249.646.348.5
(4-1) (50) (6.96) .
(700) (3.2) :
aS
= 0.75d+L+33
50ck150
(d50c) (2) (a) = 5.56 (700) (4-1) (6.96)
6.96
= 0.75d+1+33
50c150
d50c =79.82 meter (d 50c) (4-2) (5-1) :
79.82 =3.49510 -3 (S)2
8 b2
2
S2=182707 b2(4-3)
U1 =S2 (6.82610 -3 )2
24 13010-6
2
U2=0.015 S(4-4)
U2 =S2 (3.49510 -3 )2
24 13010-6
2
U2=0.004 S(4-5)
(4-5 , 4-4 , 4-3) (4-1) : S = 910 meter b 2 = 4.53 kg/mm2 ( wind Span ( (2,3) (50) (S2/SRC) .
..(1-2)
(1-1)
(1-2)
(1-3)
..(1-9)
(1-4)
(1- 5 )
..(1-10)
(1-6)
(3-1)
(3-2)
(3-3)
(3-4)
(3-5)
(3-6)
(4-1)
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