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Answered: A generalium station oh YMW has the…

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter7: Symmetrical Faults

Section: Chapter Questions

Problem 7.21MCQ

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A generating station is to supply four regions of load whose peak loads are10 MW, 5 MW, 8 MW and 7 MW. The diversity factor at the station is 1-5 and the average annual load factor is 60%. Then the installed capacity is (25 to26)MW. O (24 to25)MW. O (23 to24)MW. O
Consider the switching waveforms shown below, operating with a duty-cycle of 30%. Which statements correctly describe the switching circuit, load and circuit operation? (Multiple answers possible, but wrong answers will deduct marks) Voltage across load Voltage (V) 000 120 0000 100 80 60 40 20 30 Time (us) The load must be predominantly resistive. The average current in the load is 1.0A. The RMS current in the load is approximately 1.414A. The load must be predominantly inductive. The resistive part of the load is 200ohms. The average current in the load is 0.6A. O The resistive part of the load is 50ohms. 0 0 10 20 40 50 60 Current (A) 2 5 0.5 0 0 10 Current through load 20 W 30 Time (us) 40 50 60
The topic of signs and systems
A 13.2 kV, 60 Hz, 3-phase synchronous generator is connected in star and its neutral point is earthed while inductance per phase is 0.02 Henry. The generator is connected to a bus bar through a circuit breaker. The distributed capacitance up to circuit breaker between phase and neutral is 0.015 micro Farad. Determine the following: (i) Peak re-striking voltage (in kV) across the contact of circuit breaker; (ii) Frequency of oscillations (in kHz); (iii) Time to occurs first peak re-striking voltage (in micro second) and (iv) The average rate of rise of re-striking voltage (in mega volts per second)

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