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Achiever Study Plan ESE-2018: Power System Quiz 1
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Question 1
A power system with two generators is shown in the figure below. The system (generators, buses and transmission lines) is protected by six overcurrent relays
to
. Assuming a mix of directional and nondirectional relays at appropriate locations, the remote backup relays for 
are
to. Assuming a mix of directional and nondirectional relays at appropriate locations, the remote backup relays for are Question 2
At no load condition a 3-phase, 50Hz, lossless power transmission line has sending –end and receiving-end voltage of 400 kV and 420kV respectively. Assuming the velocity of traveling wave to be the velocity of light, the length of the line, in km, is __________.
Question 3
Two identical unloaded generators are connected in parallel as shown in the figure. Both the generators are having positive, negative and zero sequence impedance of j 0.4 p.u. j0.3, p.u. and j0.15 p.u., respectively.
If the pre-fault voltage is 1 p.u., for a line-to-ground (L-G) fault at the terminals of the generators, the fault current, in p.u., is _______.
Question 4
Two generating units rated 300 MW and 400 MW have governor speed regulation of 6% and 4% respectively from no load to full load. Both the generating units are operating in parallel to share a load of 600 MW. Assuming free governor action, the load shared by the larger unit is _______ MW.
Question 5
In a 3-phase system for a line-to-line fault the positive, negative and zero sequence voltages 
respectively, for phase voltage, 
are related as
respectively, for phase voltage, are related as Question 6
The operating characteristics of a reactance type distance relay
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Jun 15ESE & GATE EE
