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Here is a brute force method for calculating the line parameters of a 400KV transmission line right out of the text books.

The various steps in the calculation process are:

1) Read the conductor and tower configuration data.

2) Determine the various constants (GMR, GMD, etc) required for further processing of the data.

3) Perform all spacing calculations

4) Determine the potential co-efficient values and and form the potential co-efficient matrix.

5) Invert to form capacitance matrix

6) Extract the +ve seq., -ve seq. and zero seq. suceptance.

7) Determine the various phase impedance.

8) Form the impedance matrix.

9) Extract the resistance and seq. reactance.

Here is a brute force method right out of the text books for calculating the line parameters of a 400KV transmission line right out of the text books.line.

The various steps in the calculation process are:

1) Read the conductor and tower configuration data.

2) Determine the various constants (GMR, GMD, etc) required for further processing of the data.

3) Perform all spacing calculations

4) Determine the potential co-efficient values and and form the potential co-efficient matrix.

5) Invert to form capacitance matrix

6) Extract the +ve seq., -ve seq. and zero seq. suceptance.

7) Determine the various phase impedance.

8) Form the impedance matrix.

9) Extract the resistance and seq. reactance.

Here is a brute force method right out of the text books for calculating the line parameters of a 400KV transmission line.

The various steps in the calculation process are:

1) Read the conductor and tower configuration data.

data. 2) Determine the various constants (GMR, GMD, etc) required for further processing of the data.

data. 3) Perform all spacing calculations

calculations 4) Determine the potential co-efficient values and and form the potential co-efficient matrix.

matrix. 5) Invert to form capacitance matrix

matrix 6) Extract the +ve seq., -ve seq. and zero seq. suceptance.

suceptance. 7) Determine the various phase impedance.

impedance. 8) Form the impedance matrix.

matrix. 9) Extract the resistance and seq. reactance.

Here is a brute force method right out of the text books for calculating the line parameters of a 400KV transmission line.

The various steps in the calculation process are:

1) Read the conductor and tower configuration data. 2) Determine the various constants (GMR, GMD, etc) required for further processing of the data. 3) Perform all spacing calculations 4) Determine the potential co-efficient values and and form the potential co-efficient matrix. 5) Invert to form capacitance matrix 6) Extract the +ve seq., -ve seq. and zero seq. suceptance. 7) Determine the various phase impedance. 8) Form the impedance matrix. 9) Extract the resistance and seq. reactance.

Cond = 'ACSR 54/7/3.53';
print 'Conductor is ACSR 54/7/3.53'
Ew =  'GS 7/3.66'
print 'Earthwire is GS 7/3.66'
nc = 2. # number of circuits
print 'No. of three phase circuits =', nc
nb = 4. # number of conductors in bundle
print 'No. of conductors in a bundle = ', nb
ne = 2. # number of earthwires
print 'No. of earthwires = ', ne
f = 50. # frequency in Hertz
print 'Frequency in Hertz = ', f
V = 400. # base voltage in kV
print 'Voltage in kV = ', V
S = 100. # base MVA
print 'Base MVA = ', S
radc = 0.015885 # conductor radius in meters
print 'Conductor radius in meters = ', radc
Rc = 0.0556 # conductor dc resistance at 20 degC in ohms/km
print 'Conductor resistance in ohms/km  = ', Rc
rade = 0.004725 # earthwire radius in meters
print 'Earthwire radius in meters = ', rade
Re = 2.5 # earthwire resistance in ohms/km
print 'Earthwire resistance in ohms/km = ', Re
rho = 169.84 # earth resistivity in ohm-meter
print 'Earth resistivity in ohm-meters = ', rho
sagc = 13.262 # average sag of conductor
print 'Conductor sag in meters = ', sagc
sage = 10.199 # average sag of earthwire
print 'Earthwire sag in meters = ', sage
dcs = 0.457 # sub-conductor spacing
print 'Sub-conductor spacing in meters = ', dcs
kc = 0.81 # stranding factor of conductor
print 'Stranding factor of conductor = ', kc
ke = 0.726 # stranding factor of earthwire
print 'Stranding factor of earthwire = ', ke

Here is a brute force method right out of the text books for calculating the line parameters of a 400KV transmission line.

The various steps in the calculation process are:

1) Read the conductor and tower configuration data. 2) Determine the various constants (GMR, GMD, etc) required for further processing of the data. 3) Perform all spacing calculations 4) Determine the potential co-efficient values and and form the potential co-efficient matrix. 5) Invert to form capacitance matrix 6) Extract the +ve seq., -ve seq. and zero seq. suceptance. 7) Determine the various phase impedance. 8) Form the impedance matrix. 9) Extract the resistance and seq. reactance.

Cond = 'ACSR 54/7/3.53';
print 'Conductor is ACSR 54/7/3.53'
Ew =  'GS 7/3.66'
print 'Earthwire is GS 7/3.66'
nc = 2. # number of circuits
print 'No. of three phase circuits =', nc
nb = 4. # number of conductors in bundle
print 'No. of conductors in a bundle = ', nb
ne = 2. # number of earthwires
print 'No. of earthwires = ', ne
f = 50. # frequency in Hertz
print 'Frequency in Hertz = ', f
V = 400. # base voltage in kV
print 'Voltage in kV = ', V
S = 100. # base MVA
print 'Base MVA = ', S
radc = 0.015885 # conductor radius in meters
print 'Conductor radius in meters = ', radc
Rc = 0.0556 # conductor dc resistance at 20 degC in ohms/km
print 'Conductor resistance in ohms/km  = ', Rc
rade = 0.004725 # earthwire radius in meters
print 'Earthwire radius in meters = ', rade
Re = 2.5 # earthwire resistance in ohms/km
print 'Earthwire resistance in ohms/km = ', Re
rho = 169.84 # earth resistivity in ohm-meter
print 'Earth resistivity in ohm-meters = ', rho
sagc = 13.262 # average sag of conductor
print 'Conductor sag in meters = ', sagc
sage = 10.199 # average sag of earthwire
print 'Earthwire sag in meters = ', sage
dcs = 0.457 # sub-conductor spacing
print 'Sub-conductor spacing in meters = ', dcs
kc = 0.81 # stranding factor of conductor
print 'Stranding factor of conductor = ', kc
ke = 0.726 # stranding factor of earthwire
print 'Stranding factor of earthwire = ', ke

Here is a brute force method right out of the text books for calculating the line parameters of a 400KV transmission line.

The various steps in the calculation process are:

Here is a brute force method right out of the text books for calculating the line parameters of a 400KV transmission line.relocated to single answer