Transmission Lines

A load of 10 MVA, 0.8 p.f. lagging, 22 KV is served by a transmission line which has a line resistance of 3 ohms and a line reactance of 10 ohms. Solve for the sending end voltage.

The PTs of a 220 KV transmission line have a ratio of 132.76 KV/ 66.375 v and are connected wye-wye. A voltmeter connected line to ground reads 66 volts, what is the transmission line voltage?

Two No. 8 copper conductors are placed 15 cm apart with a GMR of \(1.27 \times 10^{-3}\) m. if the lenth of the line is 4 km, find the value of the line inductance.

A 34.5 kV feeder line is 5 miles long. The conductors are spaced 4-feet horizontally. The conductor is 4/0 copper with GMR of 0.01688 ft. What is the reactance?

The capacitance between any two conductors of a three-phase, three- conductor cable is 2 μF. The cable operates at 11 kV line voltage and 50 Hz. What is the charging current through the cable capacitance?

The conductors of a three-phase transmission line are arranged in the form of an equilateral triangle with sides of 6 m each. If the conductors are 500 mils in diameter and the line is 25 km long, what is its inductance per phase?

A 10-km long, single-phase short transmission line has \(0.5\angle 60^\circ\) Ω/km impedance. The line supplies a 316.8 kW load at 0.8 power factor lagging. What is the voltage regulation if the receiving end voltage is 3.3 kV?

A 345 kV transmission line has a series impedance of 4 + j60 Ω and a shunt admittance of \(j2 \times 10^{-3}\) S. Using 100 MVA and the line voltage as base values, calculate the per unit shunt admittance of the line.

The conductors of a three-phase transmission line are arranged in the form of an equilateral triangle with sides of 6 m each. If the conductors are 500 mils in diameter and the line is 25 km long, what is its inductance per phase?

The capacitance between any two conductors of a three-conductor cable, with the third conductor grounded, is 0.6 μF/km. Calculate the capacitance per phase (to neutral) of a 25-km length of the cable.

A 60 kV, three-phase short transmission line is 16 km long. The line has a per phase series impedance of 0.125 + j0.4375 ohm per km. Determine the transmission efficiency when the line delivers 70 MVA, 0.80 lagging power factor at 64 kV.

A single-phase, 10-km transmission line has a 16.65 mH total inductance. If the distance between the conductors is 1.0 m, what is the conductor radius?

A short 230 kV transmission line has an impedance of \(10\angle 80^\circ\) Ω. The sending end supplies 150 MW at 230 kV and 82% power factor. What is the voltage at the other end?

A balanced 6,600-volt, 3-phase, 3-wire, 60 Hz transmission line is designed to transmit power to a 450 kVA inductive load at 0.8 power factor. The line has a resistance of 3.5 ohms and a reactance of 10.5 ohms per wire. Find the voltage regulation of the line.

A balanced Y-connected load of (300 + j100) Ω is supplied by a 3-phase line 40 km long with an impedance of (0.6 + j0.7) Ω per km (line to neutral). Find the voltage at the receiving end when the voltage at the sending end is 66 kV.

A single-phase, 10-km transmission line has 16.65 mH total inductance. If the distance between the conductors is 1 m, what is the conductor radius?

A power station supplies 60 kW to a load over 2,500 ft of 000, 2-conductor copper feeder, the resistance of which is 0.078 ohm per 1,000 ft. The bus-bar voltage is maintained constant at 600 volts. Determine the maximum power which can be transmitted.

A 3-phase transmission line has two aluminum conductors per bundle. The self GMD of each conductor is 8.90 mm, the distance between the conductors of a bundle is 40 cm and the distance between phases is 9 m. What is the inductance of the line per phase?