Achiever Study Plan ESE-2018: Power System Quiz 2

High level factors which influence line protection will include:

High Voltage DC (HVDC) transmission is mainly used for

A composite conductor consists of three conductors of radius R each. The conductors are arranged as shown below. The geometric mean radius (GMR) (in cm) of the composite conductor is kR. The value of k is ______.

Consider a stator winding of an alternator with an internal high–resistance ground fault. The currents under the fault condition are as shown in the figure. The winding is protected using a differential current scheme with current transformers of ratio 400/5 A as shown. The current through the operating coil is

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