POWER SYSTEM ANALYSIS+DESIGN-EBK >I<
6th Edition
ISBN: 9781337259170
Author: Glover
Publisher: INTER CENG
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Chapter 5, Problem 5.14P
A 500-km, 500-kV, 60-Hz, uncompensated three-phase line has a positive-sequence series impedance
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Q2.
22
A four-pole, 415 V 50Hz induction motor supplies its rated power to a
constant load. The rated speed of the motor is 1470 rpm.
i) Draw the equivalent electrical circuit of the motor
ii) Calculate the slip frequency and slip
iii) If the supply voltage is changed to 207.5 V_25 Hz, calculate the motor
speed, slip frequency, and slip.
iv) Sketch torque-speed characteristics of the motor when the supply
voltages are 415 V 50 Hz, 207.5 V_25 Hz and 415 V_60 Hz
respectively; Compare the peak torques of the 415 V_50 Hz case and
the 415 V_60 Hz case.
b) A synchronous generator connects to an infinite bus. The terminal voltage
VT and output current IA of the generator are shown in the phasor diagram
in Figure Q2. This generator is required to double its real power output by
increasing the governor's set point while maintaining the field current. With
the aid of the phasor diagram, analyse the effect of the change of
governor's set points on the internal generated voltage EA, the output…
The figure below shows a 50Hz balanced star-star three-phase circuit with line loss. The load impedance Z = 40 + j15.08 Ω.(a)Calculate the line load impedance ZL.(b)Determine the average power:(i)Delivered by the three-phase source.(ii)Delivered to the three-phase load.(iii)Absorbed by the three-phase line.(c)Calculate the power efficiency of the system.
Three concentric spherical shells 7=1, 7=2, 7=3 m, respectively, have
charge distriutions 2, 4 and 5 μC/m².
(a) Calculate the flux through 7=1.5 m² and r = 2.5m.
(b) Find D at 7=0.5m, r=2.5m, and r=3.5m .
Chapter 5 Solutions
POWER SYSTEM ANALYSIS+DESIGN-EBK >I<
Ch. 5 - Representing a transmission line by the two-port...Ch. 5 - The maximum power flow for a lossy line is...Ch. 5 - Prob. 5.21MCQCh. 5 - A 30-km, 34.5-kV, 60-Hz, three-phase line has a...Ch. 5 - A 200-km, 230-kV, 60-Hz, three-phase line has a...Ch. 5 - The 100-km, 230-kV, 60-Hz, three-phase line in...Ch. 5 - The 500-kV, 60-Hz, three-phase line in Problems...Ch. 5 - A 40-km, 220-kV, 60-Hz, three-phase overhead...Ch. 5 - A 500-km, 500-kV, 60-Hz, uncompensated three-phase...Ch. 5 - The 500-kV, 60-Hz, three-phase line in Problems...
Ch. 5 - A 350-km, 500-kV, 60-Hz, three-phase uncompensated...Ch. 5 - Rated line voltage is applied to the sending end...Ch. 5 - A 500-kV, 300-km, 6()-Hz, three-phase overhead...Ch. 5 - The following parameters are based on a...Ch. 5 - Consider a long radial line terminated in its...Ch. 5 - For a lossless open-circuited line, express the...Ch. 5 - A three-phase power of 460 MW is transmitted to a...Ch. 5 - Prob. 5.55PCh. 5 - Consider the transmission line of Problem 5.18....Ch. 5 - Given the uncompensated line of Problem 5.18, let...
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- . Apply the divergence theorem to evaluate A ds, where A = x²a¸ + y²a, + z²a, and S is the surface of the solid bounded by the cylinder p = 1 and planes z = 2 and z = 4. Sarrow_forwardDon't use ai to answer I will report you answerarrow_forwardThe figure below shows a 60-Hz balanced star-star three-phase circuit.(a) For the equivalent circuits of the load impedance Z shown in (ii), calculate the load impedance Z, the line current IA, the power factor, and the total average power delivered to the three-phase load.(b) The power factor is corrected to 1.00 by inserting a capacitance in parallel to the resistive and inductive load as shown in (iii). Determine the capacitance value C.arrow_forward
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