Power Systems Objective Questions & Answers – Set 4

Transmission line parameters of the short transmission line are

A 1-phase transmission line has an impedance (4 + 3j ) Ω. Find the power factor of the load for zero voltage regulation?

If the rated receiving end voltage is 33 kV, then what are the limits for safe operation of equipments?

Transmission line has a length of 300 km, operating at sending end voltage V_s = 1 pu, find the receiving end voltage(V_r) at no load?

For transmission line which one of the following relation is true?

A transmission line has 50 km operating at frequency of 500 Hz. Find the type of the line?

The ABCD constants of a 3-phase transmission line are A = D = 0.8∠1°, B = 170∠85° Ω , C = 0.002∠90.4° §. The sending end voltage is 400 kV. The receiving end voltage under no load condition is

Surge impedance loading of a 3-phase, 400 kV transmission line is 400 Ω. The surge impedance loading is

Communications lines are treated as

A 1-phase transmission line has an impedance (4 + 3j ) Ω. Find the power factor of the load for zero voltage regulation?

A 1-phase transmission line has an impedance (3+4j) Ω . Find the power factor of the load for achieving maximum and zero voltage regulation?

A 3-phase transmission line has its conductors at the corners of an equilateral triangle with side 3m. The diameter of each conductor is 1.63 cm. The inductance of the line per phase per km is

In which of the following transmission lines capacitance effect is negligible?

Under excited Synchronous phase modifier works as

If transmission line parameters A and B are 0.9∠0° and 200∠90° respectively. Find the shunt reactor required to compensate the ferranti effect?

Advantages of shunt compensation is/are

Zero voltage regulation is possible only for

Condition for zero voltage regulation is

Which of the following statements is/are true

The capacitance of an overhead transmission line increases with

Installation of capacitors at suitable locations and of optimum size in a distribution system results in

For some given transmission line the expression for voltage regulation is given by (Vs - Vr)/Vr *100%. Hence,

Which of the following transmission line is most practically used in load flow analysis?

The charging reactance of 50 km transmission line is 1500 Ω. What is the charging reactance for 100 km length of line?

Condition for maximum voltage regulation

Surge impedance loading of a transmission line can be increased by

Specified quantities of load bus are

Ferranti effect occurs under

A transmission line has an impedance of (2+j6) Ω has voltage regulation of 10% at a load power factor of 0.8 lag. Find the voltage regulation for a load of 0.6 lead

A transmission line has 200 km operating at frequency of 10 Hz Hz. Find the type of the line