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 2.46P
Three identical impedances
Expert Solution & Answer
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Students have asked these similar questions
A 415 V, 57 Hz 3-phase supply is connected
to a 3-phase star connected balanced R-L
load each of resistance 13.63 ohm and
impedance 65.27 ohm. Find the value of
inductance in each phase.
O 63.83
O 0.18
O 32.63
O 7.19
Three Impedances each of (9 - j18)N are
connected in mesh across a three-phase 415V ac
supply. Determine the phase current, line current,
active power, reactive power drawn from supply.
Also draw the Phasor diagram for the mesh
connection and marks the Line current ,phase
current line voltage and phase angle between
phase current and pahse voltage.
phase current (Ip)
Line current
real power
reactive power
5. The figure below shows two star connected loads with three phase power. The
voltage source is 120Z0°. The loads are Z₁ = 10 + j4 № and Z₂ = 2 +j3 №. The
cables are negligible.
Calculate:
a)
the line and phase current.
b) the real power from the source.
c) the reactive power of the circuit.
Is
V
N
Z₁
Z₁ Z₁
Z₂
Z₂
N
N
Z₂
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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- The total reactive power consumed by the three-phase load(in VAr) is??arrow_forwardThree Impedances each of (14 – j18)N are connected in mesh across a three-phase 415V ac supply. Determine the phase current, line current, active power, reactive power drawn from supply. Also draw the Phasor diagram for the mesh connection and marks the Line current ,phase current line voltage and phase angle between phase current and pahse voltage. phase current (Ip) Line current real power reactive powerarrow_forwardHarmonicsarrow_forward
- A load of 240 +j 120 is connected to a source of 240 V with a phase angle of 300, through a transmission line with an inductive reactance of 60 ohms. A Capacitor bank of a capacitive reactance of 120 ohms is connected in parallel to the load. Total reactive power supplied by the source to the line is: O A. None of choices are correct O B. 1440 vars O C. 0 vars O D. 480 vars O E. 960 varsarrow_forwardPlease answer all subpartsarrow_forwardplease hellp me solve this one i need to paass this exam please provide a complete and detail solution, please. subject is elecetrical circuts 2arrow_forward
- asic power electrical engineering coursearrow_forwardThe impedance Z1 = 6+j8, Z2 = 8 -j6 and Z3 = 10+j0 ohms measured at 50Hz from three branches of a parallel circuit. This circuit is fed from a 100-volt 50-Hz supply. A purely reactive (inductive or capacitive) circuit is added as the fourth parallel branch to the above three-branched parallel circuit so as to draw minimum current from the source. Determine the value of L or C to be used in the fourth branch and also find the minimum current.arrow_forward13131414arrow_forward
- A balanced three-phase Delta connected voltage source supplies Delta connected three-phase symmetrical load through a three-phase line at 50 Hz as shown in the figure below. Please, answer the following using ZL=0.4+j 0.8 N and Zab = Zbc = Zca=10.3+j 14.1 N. A I a Zz Z. ca I 400 20° v +1 400Z-120° v Ic SOURCE LINÉ LOAD Part F: Calculate the reactive power of the three-phase Delta load in terms of VAr. 4002-240° varrow_forwardA balanced load is connected in star across a 3 phasec415V 50Hz supply. The load consists of a coil of resistance 25 ohms and inducrance 0.5 henry in paeallel with a purw resistance of 28 ohms and a pure capaciror of 60microfarads capacitance ,in each branch. Calculate a. The line currents The answer has to be 9.3Aarrow_forwardFor the reactance network shown in Figure 2, find element Y33 of its bus admittance matrix. Below are the given reactances: JA = 0.8 jB = 0.7 jC = 0.3 jD = 0.6 jF = 3 jG = 3 2) j B jc jD jA 8 1.2 1 28/0Oarrow_forward
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