Power System Analysis & Design
6th Edition
ISBN: 9781305636187
Author: Glover, J. Duncan, Overbye, Thomas J. (thomas Jeffrey), Sarma, Mulukutla S.
Publisher: Cengage Learning,
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Textbook Question
Chapter 2, Problem 2.30P
Figure 2.26 shows three loads connected in parallel across a
Load 1: Inductive load,
Load 2: Capacitive load,
Load 3: Resistive load,
(a) Determine the total kW, kvar, kva, and supply power factor.
(b) In order to improve the power factor to 0.8 lagging. a capacitor of negligible resistance is connected in parallel with the above loads. Find the kvar rating of that capacitor and the capacitance in
Comment on the magnitude of the supply current after adding the capacitor.
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Chapter 2 Solutions
Power System Analysis & Design
Ch. 2 - The rms value of v(t)=Vmaxcos(t+) is given by a....Ch. 2 - If the rms phasor of a voltage is given by V=12060...Ch. 2 - If a phasor representation of a current is given...Ch. 2 - Prob. 2.4MCQCh. 2 - Prob. 2.5MCQCh. 2 - Prob. 2.6MCQCh. 2 - Prob. 2.7MCQCh. 2 - Prob. 2.8MCQCh. 2 - Prob. 2.9MCQCh. 2 - The average value of a double-frequency sinusoid,...
Ch. 2 - The power factor for an inductive circuit (R-L...Ch. 2 - The power factor for a capacitive circuit (R-C...Ch. 2 - Prob. 2.13MCQCh. 2 - The instantaneous power absorbed by the load in a...Ch. 2 - Prob. 2.15MCQCh. 2 - With generator conyention, where the current...Ch. 2 - Consider the load convention that is used for the...Ch. 2 - Prob. 2.18MCQCh. 2 - The admittance of the impedance j12 is given by...Ch. 2 - Consider Figure 2.9 of the text, Let the nodal...Ch. 2 - The three-phase source line-to-neutral voltages...Ch. 2 - In a balanced three-phase Y-connected system with...Ch. 2 - In a balanced system, the phasor sum of the...Ch. 2 - Consider a three-phase Y-connected source feeding...Ch. 2 - For a balanced- load supplied by a balanced...Ch. 2 - A balanced -load can be converted to an...Ch. 2 - When working with balanced three-phase circuits,...Ch. 2 - The total instantaneous power delivered by a...Ch. 2 - The total instantaneous power absorbed by a...Ch. 2 - Under balanced operating conditions, consider the...Ch. 2 - One advantage of balanced three-phase systems over...Ch. 2 - While the instantaneous electric power delivered...Ch. 2 - Given the complex numbers A1=630 and A2=4+j5, (a)...Ch. 2 - Convert the following instantaneous currents to...Ch. 2 - The instantaneous voltage across a circuit element...Ch. 2 - For the single-phase circuit shown in Figure...Ch. 2 - A 60Hz, single-phase source with V=27730 volts is...Ch. 2 - (a) Transform v(t)=75cos(377t15) to phasor form....Ch. 2 - Let a 100V sinusoidal source be connected to a...Ch. 2 - Consider the circuit shown in Figure 2.23 in time...Ch. 2 - For the circuit shown in Figure 2.24, compute the...Ch. 2 - For the circuit element of Problem 2.3, calculate...Ch. 2 - Prob. 2.11PCh. 2 - The voltage v(t)=359.3cos(t)volts is applied to a...Ch. 2 - Prob. 2.13PCh. 2 - A single-phase source is applied to a...Ch. 2 - Let a voltage source v(t)=4cos(t+60) be connected...Ch. 2 - A single-phase, 120V(rms),60Hz source supplies...Ch. 2 - Consider a load impedance of Z=jwL connected to a...Ch. 2 - Let a series RLC network be connected to a source...Ch. 2 - Consider a single-phase load with an applied...Ch. 2 - A circuit consists of two impedances, Z1=2030 and...Ch. 2 - An industrial plant consisting primarily of...Ch. 2 - The real power delivered by a source to two...Ch. 2 - A single-phase source has a terminal voltage...Ch. 2 - A source supplies power to the following three...Ch. 2 - Consider the series RLC circuit of Problem 2.7 and...Ch. 2 - A small manufacturing plant is located 2 km down a...Ch. 2 - An industrial load consisting of a bank of...Ch. 2 - Three loads are connected in parallel across a...Ch. 2 - Prob. 2.29PCh. 2 - Figure 2.26 shows three loads connected in...Ch. 2 - Consider two interconnected voltage sources...Ch. 2 - Prob. 2.35PCh. 2 - Prob. 2.36PCh. 2 - Prob. 2.37PCh. 2 - Prob. 2.38PCh. 2 - Prob. 2.39PCh. 2 - A balanced three-phase 240-V source supplies a...Ch. 2 - Prob. 2.41PCh. 2 - A balanced -connected impedance load with (12+j9)...Ch. 2 - A three-phase line, which has an impedance of...Ch. 2 - Two balanced three-phase loads that are connected...Ch. 2 - Two balanced Y-connected loads, one drawing 10 kW...Ch. 2 - Three identical impedances Z=3030 are connected in...Ch. 2 - Two three-phase generators supply a three-phase...Ch. 2 - Prob. 2.48PCh. 2 - Figure 2.33 gives the general -Y transformation....Ch. 2 - Consider the balanced three-phase system shown in...Ch. 2 - A three-phase line with an impedance of...Ch. 2 - A balanced three-phase load is connected to a...Ch. 2 - What is a microgrid?Ch. 2 - What are the benefits of microgrids?Ch. 2 - Prob. CCSQCh. 2 - Prob. DCSQ
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- solve by impedancearrow_forwardConsider the circuit diagram below. Compute a single equivalent impedance for this circuit for a source frequency of F = 60 Hz. Express your final answer as a complex impedance with rectangular coordinates. You must show your all your work for the complex math. Include a diagram of the equivalent circuit as part of your solution.arrow_forwardConsider the circuit diagram below. Compute a single equivalent impedance for this circuit for a source frequency of f = 165 Hz. Express your final answer as a phasor with polar coordinates. You must show your all your work for the complex math. Include a diagram of the equivalent circuit as part of your solution.arrow_forward
- Consider the circuit diagram below. Using mesh analysis, compute the currents (a) IR1, (b) IL1, and (c) IC1. Express your final answers as phasors using polar coordinates with phase angles measured in degrees. Your solution should include the circuit diagram redrawn to indicate these currents and their directions. You must solve the system of equations using MATLAB and include the code or commands you ran as part of your solution.arrow_forwarduse kvl to solvearrow_forwardR1 is 978 ohms R2 is 2150 ohms R3 is 4780 R1 is parallel to R2 and R2 is parallel to R3 and R1 and R3 are in seriesarrow_forward
- Q7 For the circuit shown in Fig. 2.20, the transistors are identical and have the following parameters: hfe = 50, hie = 1.1K, hre = 0, and hoe = 0. Calculate Auf, Rif and Rof. Ans: 45.4; 112 KQ; 129. 25 V 10k 47k 4.7k Vo 150k w Vs 47k 4.7k W 22 5μF 33k 50uF 50μF 4.7k 4.7k R₁ Rof Rif R1000 Fig. 2.20 Circuit for Q7.arrow_forwardQ6)) The transistors in the feedback amplifier shown are identical, and their h-parameters are.. hie = 1.1k, hfe = 50, hre=o, and hoe = 0. Calculate Auf, Rif and Rof. {Ans: 6031583; 4. Kor. Is 4 4.7 k www 4.7k 91k 4.7k 91k 10k 1k. 10k 21000 4.7k w 15k Fig. 2.19 Circuit for Q6.arrow_forwardQ5 For the circuit shown in Fig. 2.18, hie =1.1 KQ, hfe =50. Find Avf, Rif and Rof Ans: -3.2; 193 ; 728 N. Vcc Vs Rs=10kQ Re=4KQ RF - = 40ΚΩ www Fig. 2.18 Circuit for Qs.arrow_forward
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