Transmission voltage and Conductor Selection Methodology with loss and max current calculation
<INPUT>
Primary Input
Conductor Type
Voltage Level
Power Factor(cos pi)
SinePi
Circuit
Line Length
Total Resistance
Total Reactance
Actual Transmission Voltage
Monthly Power
Month
Power (MW)
ACSR Temperature, oC
Total Current Itot, A
Current, Imax, A
Resistance at ToC
Transmission Loss, MW
Loss Percentage,
voltage at receiving end
Voltage regulation
OUTPUT
Otter
single
33.00 kV
0.8
0.60
<Single, Double, FourCL>
6 km
2.06
2.35
36.32 kV
Secondary Input
Number of Circuits
Equivalent resistance/phase/km
Equivalent reactance/phase/km
1
0.3434
0.3923023
Ohm
Ohm
January
5
4.00 Max current I for Max current I in still
50 temp rise of 30 oC
air
87.48
250
185
87.48
2.31
0.05
1.32%
109.73
3.33
Transmission capacity Ok
Note
** This is master Database for Transmission line conductor and voltage level selection for specified Power
** Please change the variable in Red colours as per the requirement.
48
Voltage Regulation Calculation
Transmission Voltage=33KV
Circuits
Single
<Single,Double,Fourcl>
Power factor
0.8
Length of line
23
Conductor type Wolf
Properties of ACSR Conductor
Conductor
Electrical Properties
Code Name
Eq. Cu Area
Sq mm
Sq. inch
Ferret
Rabbit
Otter
Dog
Wolf
Lynx
Panther
Lion
Bear
25
30
50
65
95
110
130
140
160
0.040
0.050
0.080
0.100
0.150
0.175
0.200
0.215
0.250
Line Voltage KV
Spacing m
0.4
0.2
11
1.2
Eq. Al
resistance
Current
Area
at 200C
in still air
Strand & Wire dia (mm)
Sq Inch
ohm/km (amp)
41.87
0.6795
52.21
0.5449
82.85
0.3434
103.60
0.2750
154.30
0.1844
179.00
0.1589
207.00
0.1375
232.50
0.1223
258.10
0.1102
33
2.0
66
2.5
Alu
115
135
185
205
305
335
370
405
430
No/Dia
6/3.00
6/3.35
6/4.22
6/4.72
30/2.59
30/2.79
30/3.00
30/3.18
30/3.35
132
3.5
220
6.0
a
c'
2
m1=
n1=
D
b
4
n
b'
2
D
c
a'
3
Fig: Proposed line configuration
Dog
1
1.260
0.006
1.5
1.890
0.006
2
2.520
0.006
2.5
3.150
0.006
3
3.780
0.006
3.5
4.410 Spacing
0.006 GMD
1.086
0.341
0.16787
3.47745E-06
Wolf
1
1.260
0.007
1.037
0.326
0.16024
3.65411E-06
Lynx
1
1.260
0.008
1.021
0.321
0.15774
3.71605E-06
Lion
1
1.260
0.009
0.995
0.313
0.15368
3.82103E-06
1.167
1.224
0.367
0.385
0.17844
0.18555
3.24E-06 3.09082E-06
1.269
0.399
0.19101
2.99E-06
1.305
0.410
0.19555
2.9E-06
1.336
0.420
0.19947
2.83884E-06
1.5
1.890
0.007
1.118
0.351
0.17081
3.39E-06
2
2.520
0.007
1.176
0.370
0.17792
3.2296E-06
2.5
3.150
0.007
1.220
0.384
0.18339
3.12E-06
3
3.780
0.007
1.257
0.395
0.18792
3.03E-06
3.5
4.410
0.007
1.288
0.405
0.19184
2.95549E-06
1.5
2
1.890
2.520
0.008
0.008
1.102
1.160
0.346
0.365
0.16831
0.17542
3.44E-06 3.27788E-06
2.5
3.150
0.008
1.204
0.379
0.18089
3.16E-06
3
3.780
0.008
1.241
0.390
0.18542
3.07E-06
3.5
4.410
0.008
1.272
0.400
0.18934
2.99588E-06
1.5
1.890
0.009
1.077
0.338
0.16425
3.53E-06
2.5
3.150
0.009
1.179
0.370
0.17683
3.24E-06
3
3.780
0.009
1.215
0.382
0.18136
3.14E-06
3.5
4.410
0.009
1.246
0.392
0.18529
3.06374E-06
2
2.520
0.009
1.134
0.356
0.17137
3.3593E-06
GMR
Inductance L
Inductive Reactance
Inductive Reactance for double ckt line
Admittance
Spacing
GMD
GMR
Inductance L
Inductive Reactance
Inductive Reactance for double ckt line
Admittance
Spacing
GMD
GMR
Inductance L
Inductive Reactance
Inductive Reactance for double ckt line
Admittance
Spacing
GMD
GMR
Inductance L
Inductive Reactance
Inductive Reactance for double ckt line
Admittance
0.0
CSR Conductor
Mechanical Properties
Strand & Wire dia (mm)
Overall
Total
Steel
Conductor
Area
No/Dia
1/3.00
1/3.35
1/4.22
7/1.57
7/2.59
7/2.79
7/3.00
7/3.18
7/3.35
Dia mm
3.16227766
3.605551
9.00
10.05
12.60
14.20
18.10
19.60
21.00
22.30
22.90
3.354102
4.242641
Approximate Weight / kg / km
Al
Steel
UTS
Total
49.60
61.90
98.00
118.45
195.00
226.00
262.00
295.00
326.00
116
145
230
288
436
507
586
659
734
55
69
109
106
291
338
390
438
485
3.605551275 3.90512484
5.000000
5.830952
4.242641
6.708204
4.609772
7.615773
2
2.520
0.004
1.316
0.413
0.19988
2.86E-06
2
2.520
0.004
1.293
(kg)
171
214
339
394
727
845
976
1097
1219
1503
1860
2923
3299
6880
7950
9127
10210
11310
2.5
3.150
0.004
1.360
0.427
0.20535
2.77E-06
3
3.780
0.004
1.397
0.439
0.20988
2.7E-06
3.5
4.410
0.004
1.427
0.449
0.21380
2.64E-06
2.5
3.150
0.004
1.338
3
3.780
0.004
1.375
3.5
4.410
0.004
1.405
Ferret
1
1.5
1.260
1.890
0.004
0.004
1.177
1.258
0.370
0.395
0.18220
0.19277
3.18783E-06 2.9856E-06
Rabbit
1
1.5
1.260
1.890
0.004
0.004
1.155
1.236
0.363
0.388
0.17873
0.18930
3.2534E-06 3.0431E-06
Otter
1
1.5
1.260
1.890
0.005
0.005
1.110
1.191
0.349
0.374
0.17163
0.18219
3.39656E-06 3.1679E-06
Xl
0.407
0.19641
2.91E-06
0.421
0.20188
2.82E-06
0.432
0.20641
2.75E-06
0.442
0.21033
2.69E-06
2
2.520
0.005
1.248
0.392
0.18931
3.03E-06
2.5
3.150
0.005
1.293
0.406
0.19477
2.93E-06
3
3.780
0.005
1.329
0.418
0.19930
2.85E-06
3.5
4.410
0.005
1.360
0.427
0.20323
2.78E-06
2
2.520
0.008
1.146
0.360
0.17325
3.32E-06
2.5
3.150
0.008
1.191
0.374
0.17872
3.2E-06
3
3.780
0.008
1.227
0.386
0.18325
3.11E-06
3.5
4.410
0.008
1.258
0.395
0.18717
3.03E-06
2
2.520
0.009
1.129
0.355
0.17053
3.38E-06
2.5
3.150
0.009
1.173
0.369
0.17600
3.25E-06
3
3.780
0.009
1.210
0.380
0.18053
3.16E-06
3.5
4.410
0.009
1.241
0.390
0.18445
3.08E-06
Xl
1.6148E-06
Panther
1
1.5
1.260
1.890
0.008
0.008
1.007
1.089
0.317
0.342
0.15557
0.16614
3.77144E-06 3.4917E-06
Bear
1
1.5
1.260
1.890
0.009
0.009
0.990
1.071
0.311
0.337
0.15285
0.16342
3.84337E-06 3.5532E-06
0.508150414
5.65405E-07
Xl
Xl
0.003837
Voltage=5.5*(sqrt(L/1.6+P/100))
Where (L= distance in Km and P=power in kW)
Inductance/phase/Km L= 2*1e-7ln(GMD/GMR)
or L=0.4605log(GMD/GMR) mh/Km
For Double Ckt line
L=
2*1e-7ln((2e-6)*(sqrt(D/r'))*((m/n)^(1/3)))
Price/km
NRs.
Conductors Thermal Capacity MVA
60,500
100,000
120,000
Conductor Size (sq.inch)
0.25
142
0.2
123
0.3
180
0.15
103
0.08
42
0.1
51
120sq.mm
44
Spacing
GMD
GMR
Inductance L
Inductive Reactance Xl
Inductive Reactance for double ckt line
Admittance
Spacing
GMD
GMR
Inductance L
(where GMD= Geometric Mean Distance & GMR=
Inductive Reactance Xl
Inductive Reactance for double ckt line
Admittance
Spacing
GMD
GMR
Inductance L
Inductive Reactance Xl
Inductive Reactance for double ckt line
Admittance
Spacing
GMD
GMR
Inductance L
Inductive Reactance Xl
Inductive Reactance for double ckt line
Spacing
GMD
GMR
Inductance L
Inductive Reactance Xl
Inductive Reactance for double ckt line
Admittance
etric Mean Distance & GMR= Geometric Mean Radius;)
