Performance Of Transmission Lines Line Parameters And Corona Practice Questions

Considered a bundled conductor of an overhead line consisting of three identical sub-conductors placed at the corners of an equilateral triangle as shown in the figure. If we neglect the charges on the other phase conductor and ground, and assume that spacing between sub-conductors is much larger than their radius, the maximum electric field intensity is experienced at

A single phase transmission line and a telephone line are both symmetrically strung one below the other, in horizontal configurations, on a common tower, The shortest and longest distances between the phase and telephone conductors are 2.5 m and 3 m respectively. The voltage (volt/km) induced in the telephone circuit, due to 50 Hz current of 100 amps in the power circuit is

The concept of an electrically short, medium and long line is primarily based on the

The A, B, C , D constants of a 220 kV line are : $A=D=0.94\angle 1^{\circ}$ , $B=130\angle 73^{\circ}$ , $C=0.001\angle 90^{\circ}$ . If the sending end voltage of the line for a given load delivered at nominal voltage is 240 kV, the % voltage regulation of the line is

The generalized circuit constants of a 3-phase, 220 kV rated voltage, medium length transmission line are $A=D=0.936+j0.016=0.936\angle 0.98^{\circ}$ $B=35.5+j138=142.0\angle 76.4 ^{\circ} \Omega$ $C=(-5.18+j914)\times 10^{-6}\Omega$ If the load at the receiving end is 50 MW at 220 kV with a power factor of 0.9 lagging, then magnitude of line to line sending end voltage should be

The ABCD parameters of a 3-phase overhead transmission line are $A=D=0.9\angle 0^{\circ}$ , $B=200\angle 90^{\circ}\Omega$ and $C=0.95 \times 10^{-3}\angle 90^{\circ}$ S. At no-load condition a shunt inductive, reactor is connected at the receiving end of the line to limit the receiving-end voltage to be equal to the sending-end voltage. The ohmic value of the reactor is

Bundled conductors are mainly used in high voltage overhead transmission lines to

Consider a long, two-wire line composed of solid round conductors. The radius of both conductors is 0.25 cm and the distance between their centers is 1m. If this distance is doubled, then the inductance per unit length

A long wire composed of a smooth round conductor runs above and parallel to the ground (assumed to be a large conducting plane). A high voltage exists between the conductor and the ground. The maximum electric stress occurs at

The conductors of a 10 km long, single phase, two wire line are separated by a distance of 1.5m. The diameter of each conductor is 1 cm. If the conductors are of copper, the inductance of the circuit is