P7.1. Solutions for line voltage and current for an open-circuited line. For a line open-circuited at the far end, as shown in Fig. 7.41, obtain the solutions for the phasorline voltage and current, and sketch the voltage and current standing-wave pat-terns, as in Fig. 7.4.FIGURE 7.41For Problem P7.1.Zo, BOpenCircuit+dd = 0

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Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter4: Transmission Line Parameters

Section: Chapter Questions

Problem 4.32MCQ

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7.1 Using the rc smoothing circuit, how long must a tool stay next to a formation to receive 95% of the counts available to it?
7.75 The circuit shown in Figure P7.75 is a Y-A-Y connected three-phase circuit. The primaries of the transformers are wye-connected, the secondaries are delta-connected, and the load is wye-connected. Find the currents Igp, IwWP, Igp, La, Ig, and Ic. IRP. 46020° Vo- 4:1 102 10 2 Iwp 460Z120° Vo 4:1 Igp 4602-120° Vo- 4: 10 2 Ideal transformer
7:25 = III moodle.nct.edu.om 13 Per phase voltage A load of 130 MW at a power factor of 0.75 lagging can be delivered by a 3-phase transmission line. The voltage at the receiving end is to be maintained at 48 kV and the loss in the transmission as 9.5 % of the power delivered. (Consider the line to be a short transmission line) Find Single phase Power delivered !!! LTE O Current flowing through the transmission line 3 Phase Losses in the transmission line Per phase resistance of the transmission line
Given the waveform of a voltage source shown in figure P7.8 find: a. The steady DC voltage that would cause the same heating effect across a resistance. b. The average current supplied to a 10-ohm resistor connected across the voltage source. c. The average power supplied to a 1-ohm resistor connected across the voltage source.
For the circuit shown in Figure 7.1, determine apparent power S, real power P, reactive power Qand power factor PF. Also, draw the power triangle.
Consider a 3-phase, 50 HZ, 11 KV distribution system. Each of conductors is suspended by an insulator string having two identical porcelain insulators. The self-capacitance of the insulator is 5 times the shunt capacitance between link and ground. Find the voltages across two insulators.
7.73 To correct the power factor problems of the motor in Problem 7.72, the company has decided to install capacitors as shown in Figure P7.73. Assume rms values. a. What capacitance must be installed to achieve a unity power factor if the line frequency is 60 Hz? b. Repeat part a if the power factor is to be 0.85 (lagging). 50 j62 50 jó N 50 j6 2 Figure P7.73 all ele ww
7.62 For the circuit shown in Figure P7.62, find the current in the neutral wire and the real power. TR= 22020 102 ww 10 2 Tr= 2202 21/3 0 10 2 V3= 220 4n/3 o IN
Example 7.1 A two-conductor single-phase line operates at 50 Hz. The diameter of t conductor is 20 mm and the spacing between the conductors is 3 m. Calculate (a) the induction of each conductor per km, (b) the loop inductance of the line per km, (c) the inductive react per km, and (d) the loop inductance per km of the line when the conductor material is steel d relative permeability 50.
Compute the average power dissipated by the load seen by the voltage source in figure P7.6. Let omega = 377 rad/s, V_s = 50<0, R = 10 ohm, L = 0.08H, and C = 200 microFarads.
Please provide Handwritten answer of all parts
7.77 For the circuit shown in Figure P7.77, find the currents IĄ, Ig, Iç and In, and the real power dissipated by the load. 22020° V 4 20 2 40 2 j10 2 Ig 1102120° V 20 2 1102-120° V- I, wll

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