A 3-ph, 60 Hz, 200 km long, 220 kV transmission line has per km per phase constants of resistance 0.033 Ω, inductive reactance 0.33 Ω, capacitive susceptance 3.3x10 -6 mho. The load at the receiving end of the line is 500 MW at 0.95 power factor leading and voltage has dropped to 209 kV. Using the PI model, calculate the voltage, current and power factor at the sending end.

A 220 kV, three phase transmission line is 50 km long. The resistance per phase is r 2 per km and the inductance per phase is L mH per km. The shunt capacitance is negligible. If the line supplies a three-phase load of 229 MVA at 0.8 power factor lagging at 220 kV with an efficiency of 97.13% and a voltage regulation of 4.7581%. Use the short line model to find the line resistance and inductance of the line.

60 Hz three-phase transmission line, Each single phase transmission line consists of two hard-drawn aluminium conductors with a radius of 2 cm spaced 1.2m apart. It delivers 150 MW at 220 KV at the receiving end with a power factor of 0.88 lagging. If the transmission line is 30 Km long and the temperature of the conductors is 20 C. Ignore the skin effect and consider the resistivity of Aluminium is (2.83 x 10-8), and permeability of free space, u= 4pi*10-7 N/A2 and permeability of it is= 8.85x10-12 F/m.   - Find total series impedance.   - Find total shunt admittance.   - Find the voltage at the sending end using long-line equation.

Answer the first and last 2 qestion Step By Step