To be transmitted is V, = 12 cos (59t + 10), the impedance of the generation system is neglected, the impedance of the transmission line ZLiena = 20 + j8, the transmission line is connected to an arrangement It is necessary to transmit the electrical power coming from a generation system, the voltage a of two loads configured in parallel of magnitude Z1- = 2+ j6 and Z2-load = 12 + j10. a) Analyze the losses of the system (load and transmission line) without the use of transformers b) By applying the power transmission transformers, analyze the losses of the system (load and transmission line). c) Analyze the efficiency of the system if the power factor is 0.7, considering the output power 45 KW!

To be transmitted is V, = 12 cos (59t + 10), the impedance of the generation system is neglected, the impedance of the transmission line ZLiena = 20 + j8, the transmission line is connected to an arrangement It is necessary to transmit the electrical power coming from a generation system, the voltage a of two loads configured in parallel of magnitude Z1- = 2+ j6 and Z2-load = 12 + j10. a) Analyze the losses of the system (load and transmission line) without the use of transformers b) By applying the power transmission transformers, analyze the losses of the system (load and transmission line). c) Analyze the efficiency of the system if the power factor is 0.7, considering the output power 45 KW!

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Answer number 5
Circuit theory. Y-connected balanced three-phase generator with an impedance of Zs =0.4+j0.3 ohm per phase is connected to a Y-connected balanced load with an impedance of ZL=14+j31 ohm per phase. The line joining the generator and the load has an impedance of Zl=0.6+j0.7 ohm per phase. Assuming a positive sequence for the source voltages and that amplitude of |Van|=188 and its phase angle 30 degree Find: (a) amplitude of the line voltage Vbc, (b) amplitude of the line current Ic, (c) the complex power at the balanced three-phase load. a. (a) Vb=325.63 V, (b) Ic=5.32 A, (c) S = 84006.67 + j 989.44 VA b. (a) Vb=265.87 V, (b) Ic=3.07 A, (c) S = 14001.11 + j 285.63 VA c. (a) Vb=325.63 V, (b) Ic=5.32 A, (c) S = 9508.07 + j 21053.59 VA d. (a) Vb=265.87 V, (b) Ic=5.32 A, (c) S = 3565.53 + j 7895.10 VA e. (a) Vb=325.63 V, (b) Ic=7.98 A, (c) S = 42003.33 + j 742.08 VA f. (a) Vb=325.63 V, (b) Ic=6.38 A, (c) S = 4754.04 + j 10526.80 VA g. (a) Vb=325.63 V, (b) Ic=5.32…
20. The impedances of the three phase of a star-connected load (no neutral wire) are (5+j20), (12+J0) and (1-j10) in that order. The voltage is 400 volts. Find the line currents. (0.5-j29.65), (16.24-j11.5); (- 16.74+ j41.15)] Answer
Assume that two load impedances Zj and Z, are connected in series with respect to each other but Z, and Z, are connected in parallel with Z, and that loads Z,, Z,, and Z, require 5 kVA at 0.8 lagging power factor, 10kVA at 0.9 lagging power factor, 5kW at unity power factor, respectively. Determine the kW required by the total load, if the frequency is 60 Hz. 1.1
11.20 For the circuit shown in Fig. P11.20, find PSPICE a) the phase currents IAB, IBC, and ICA, MULTISIM b) the line currents IaA, IbB, and Icc when Z1 = 2.4 - j0.7 N, Z2 = 8 + j6 N, and Z3 = 20 + j0 N.
A 13.8-kV, single-phase generator supplies power to a load through a transmisson line. The load's impedance is Zjoad = 300 L 36.87°, and the transmission line's impedance is Zne = 80 L60° What is the load voltage in kVolts?
Using a test equipment, Vmax was found to be 5V while Vmin is 1V. The distance between voltage maximas is 14 cm and the first maximum was found to be 7 cm from the load. What is the load impedance if the characteristic impedance of the line is 75 ohms?
An unbalanced star-connected load is supplied from a 400-V, 3-ph, Y-connected alternator through conductors having impedances of 4 + j3 02. The load consists of ZA = 15/30 2, ZB = 30/45° and Zc = 30/60°. There is no neutral connection. The phase sequence is ABC with Esc as the reference phasor. Determine the line currents and the voltage between the star-point of the alternator and that of the load. Express your answers in polar form.
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A three-phase A-connected generator has an inter- nal impedance of 9 + j90 m2/þ. When the load is removed from the generator, the magnitude of the terminal voltage is 13,800 V. The generator feeds a A-connected load through a transmission line with an impedance of 20 + j180 m2/þ. The per-phase impedance of the load is 7.056 + j3.417 N. a) Construct a single-phase equivalent circuit. b) Calculate the magnitude of the line current. c) Calculate the magnitude of the line voltage at the terminals of the load. d) Calculate the magnitude of the line voltage at the terminals of the source.
11 B/s A load of 120 MW at a power factor of 0.9 lagging can be delivered by a 3-phase transmission line. The voltage at the receiving end is to be maintained at 42 kV and the loss in the transmission is 8 % of the power delivered. (Consider the line to be a short transmission line) Find Single phase Power delivered Per phase voltage Current flowing through the transmission line 3 Phase Losses in the transmission line Per phase resistance of the transmission line II
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