All India SSC JE 2017 Electrical Engineering - Quiz 20

Choose two appropriate auxiliary components of a HVDC transmission system from the following
P. D.C. line inductor
Q. A.C. line inductor
R. Reactive power sources
S. Distance relays on D.C. line
T. Series capacitance of A.C. line

A 3-phase transmission line is shown in the figure:


Voltage drop across the transmission line is given by the following equation:

Shunt capacitance of the line can be neglected. If the line has positive sequence impedance of 15Ω and zero sequence impedance of 48Ω, then the values of Z_s and Z_m will be

Two regional systems, each having several synchronous generators and loads are interconnected by an ac line and HVDC link as shown in the figure. Which of the following statements is true in the steady state:

The sequence components of the fault current are as follows: I_positive = j 1.5 pu, I_negative = –j 0.5 pu, I_zero = –j 1 pu. The type of fault in the system is

The surge impedance of over-head transmission lines ranges from: