A 3-phase 60 HZ , 200km transmission line has a series impedance of z= 0.10 +...

A 3-phase 60 HZ , 200km transmission line has a series impedance of z= 0.10 + j0.35 Ω/km and a capacitive reactance of 0.2 x 10 6 Ω-km. At the receiving end, the line delivers 250 MW @230/30θ kV and 0.95 lagging power factor.

Determine

a) The line impedance and shunt admittance

b) The A, B, C , D parameters

c) Sending end complex power and power factor

d) Is the PF is leading or lagging

e) Voltage regulation for the line

f) Line efficiency

g) Characteristic impedance of the line

Expert Solution

THANK YOU

Manojponduru answered 2 years ago

A 60-Hz, 230-km, three phase overhead transmission line has a series impedance z = 0.85<78.04 ̊...

A 60-Hz, 230-km, three phase overhead transmission line has a series impedance z = 0.85<78.04 ̊ /km and a shunt admittance y = 5.105 x 10-6 < 90 ̊ S/km. The load at the receiving end is 135 MW at unity power factor and 215 kV. Determine the voltage, current, real and reactive power at the sending end and the percent voltage regulation of the line.

A 35 km, 34.5-kV, 60-Hz three phase line has a positive-sequence series impedance z = 0.10...

A 35 km, 34.5-kV, 60-Hz three phase line has a positive-sequence series impedance z = 0.10 + j0.40 Ohms/km. The load at the receiving end absorbs 15 MVA at 33 kV. Assuming a short line, calculate: (a) the ABCD parameters, (b) the sending-end voltage for a load power factor of 0.95 lagging, (c) the sending-end voltage for the a load power factor of 0.9 leading. (d) For which case is the sending-end voltage higher?

A three-phase 60-Hz transmission line is energized with 420 kV at the sending end. This line...

A three-phase 60-Hz transmission line is energized with 420 kV at the sending end. This line is lossless and 400 km long with ? = 0.001265 rad/km and ?? = 260 Ω. a) Suppose a three-phase short-circuit occurs at the receiving end. Determine the receiving end current and the sending end current. b) Determine the reactance and MVar of a shunt reactor to be installed at the load bus to limit the no-load receiving-end voltage to 440 kV. c) When...

A 3-Phase, 60 HZ transmission line has the following parameters: L= 2.563 x 10^(-3) H/mi R=...

A 3-Phase, 60 HZ transmission line has the following parameters: L= 2.563 x 10^(-3) H/mi R= 0.25 Ohms/mi Y= 5 x 10^(3) S/mi The line is 200 mi long and it delivers 150 MW at 220 kV and unity power factor to a substation at its receiving end. Find the efficiency and voltage regulation of the transmission line.

A three-phase motor is delta connected to a 415 V, 60 Hz line. If the line...

A three-phase motor is delta connected to a 415 V, 60 Hz line. If the line current is 25 A and the motor power factor is 0.75, how much power is consumed by the motor (a) Determine the size of the bank of three capacitors to improve the power factor of the motor to 0.95. The capacitors are delta connected. (b) If two of the motors work together, what is the size of capacitors to correct the power factor to...

A three-phase line has an impedance of 1 + j2 Ω per phase. The line feeds...

A three-phase line has an impedance of 1 + j2 Ω per phase. The line feeds two balanced three-phase loads that are connected in parallel. The first load is Y-connected and has an impedance of 20+j40 Ω per phase. The second load is ∆-connected and has an impedance of 30-j60 Ω per phase. The line-to-line voltage at the load end of the line is 415V. Taking the phase voltage Va as reference, determine: a) The total current per phase from...

A three-phase line has an impedance of 1 + j3 Ω per phase. The line feeds...

A three-phase line has an impedance of 1 + j3 Ω per phase. The line feeds a balanced delta-connected load, which absorbs a total complex power of 12 + j5 kVA. The line voltage at the load end has a magnitude of 300 V. Calculate the magnitude of the line voltage at the source end.The magnitude of the line voltage at the source end is ____ V.

345 kV, 50 Hz, 3-phase transmission line is 100 km long. The resistance is 0.048 Ω/km...

345 kV, 50 Hz, 3-phase transmission line is 100 km long. The resistance is 0.048 Ω/km and the inductance is 1,24 mH/km. The shunt capacitance is 0.0174 μF/km. The receiving end load is 216 MW with 0.8 power factor lagging at 325 kV. (a) Compute ABCD parameters using π equivalent circuit (b) Sending end voltage VS, (c) Sending end current IS, (d) Efficiency

The impedance of a three-phase, 50 km long power transmission line per unit length is 0.05...

The impedance of a three-phase, 50 km long power transmission line per unit length is 0.05 + j0.1  / km. A load with a power coefficient of 0.8 forward is fed from the end of the line. Line and end of line of energy transmission line According to the intention to keep the voltage between phases constant at 154 kV; a) Active and reactive power values drawn from the beginning and end of the line, b) Calculate the lost...

A lossless transmission line of length l=0.4? is terminated with a complex load impedance Z_L=60+j50 ?...

A lossless transmission line of length l=0.4? is terminated with a complex load impedance Z_L=60+j50 ? and characteristic impedance (Z_0=50 ?). Use Smith Chart to find: The VSWR on the line; The reflection coefficient at the load and its phase angle; The load admittance of the line Y_L in S; The input impedance of the line in ?; The distance to the first voltage minimum from the load in ?; and The distance to the first voltage maximum from the...

Question