Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN: 9781305632134
Author: J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher: Cengage Learning
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Textbook Question
Chapter 2, Problem 2.4P
For the single-phase circuit shown in Figure 122,
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Chapter 2 Solutions
Power System Analysis and Design (MindTap Course List)
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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- An alternating single phase circuit describes the instantaneous values of the applied voltage and the corresponding current as: v = 360 sin (201,69 t + π/6) and i = 36 sin (201,69 t - π/9) Calculate: the impedance, resistance and reactance of the circuit, the r.m.s.-values of the voltage and current, the true-, apparent- and reactive power in the circuit The time taken to reach -190 V for the second time. Sketch the phasor diagram of this circuitarrow_forward33. Ohm s Law applies to all types of circuits, but in the case of AC circuits, all circuit quantities must be expressed as magnitude only." True False In capacitor, current leads the voltage by 90 degrees." True False Capacitive reactance is a form of reactance that opposes the voltage change. True False Susceptance is always expressed as a real number and comprised the real part of admittance equation. True False The impedance (Z) of a circuit is technically a phasor because it does not correspond to a sinusoidally varrying quantity. True Falsearrow_forwardQuestion text Three Impedances each of (6 – j26)Ω are connected in mesh across a three-phase 425V ac supply. Determine the phase current, line current, active power, reactive power and apparent power drawn from supply. phase current (Ip) , Line current , real power , reactive power , Apparent powerarrow_forward
- 73. In phasor, the resistance has an angle of 90 degrees and the voltage and current are in phase." True False 74. The impedance (Z) of a circuit is the ratio of the phasor current to the phasor voltage. True False 75. Conductance is always expressed as a real number and comprised the real part of impedance equation. True Falsearrow_forwardIn the diagram below, let The interconnector has an impedance of X-Ω/phase be X =0.33 + 0.34j Correct every question to two decimal places : (b) Open circuit bc and determine the following parameters by applying Thevenin’s theorem:32.Ian (A) and it's angle 33 Vac (V) and it's angle 34.Vab (V) and it's anglearrow_forwardA 3-phase load consists of three similar inductive coils, each of resistance 50Ω and inductance 0.3 H. The supply is 415 V, 50 Hz, Calculate (a) the line current (b) the power factor and (c) the total power when the load is (i) star-connected and (ii) delta-connected.arrow_forward
- Assume X= 3Y= 4Z= 4 For the circuit shown in the Figure , calculate ZT and Vab.arrow_forwardThree loads are connected in parallel across a single-phase source voltage of 240V(RMS). Load 1 absorbs 15 kW and 6.667 kvar; Load 2 absorbs 3 kVA at O.96PF leading; Load 3 absorbs 15 kW at unity power factor. Calculate the equivalent impedance, Z, for the three parallel loads, for two cases: (i) Series combination of R and X, and (ii) parallel combination of R and X.arrow_forwardA balanced load of phase impedance 100Ω and power factor 0.8 is Star-connected to400v, 3 supply. Calculate the power dissipated.arrow_forward
- 6) The three arms a 3-phase load each comprise an inductor of resistance 25Ὠ and of inductance 0.15 H in series with a 120µF capacitor. The supply is 415V, 50HZ. Calculate the line current and total power in watts, when the three arms are connected a) in star b) in mesharrow_forwardPlease answer quickly "In ac circuits, Kirchhoff s Voltage Law (KVL) states that in any given electric network, the phasor sum of the voltage rises and voltage drops within a loop is always equal to zero." True False Nodal analysis method is a nework analysis method which is not applicable to planar circuits only. True False Ac network solution using Kirchhoff's laws are usually based on finding the unknown branch current first; while Ac network solution using mesh equations are usually based on finding the unknown mesh current first and Ac network solution using nodal equations are usually based on finding the unknown branch current first. True Falsearrow_forward1. Draw a phasor diagram depicting the relation between 50 Hz voltages in the phase domain to distinguish between positive and negative phase sequence. 2. Write down the relation between line and delta currents. 3. Write down the equivalent Y impedance per phase compared to a delta-connected impedance.arrow_forward
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