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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Chapter 5, Problem 5.42P
A three-phase power of 460 MW is transmitted to a substation located 500 km from the source of power. With
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A 105MHz, 90 v peak signal is incident on a 50-ohm transmission line. The line is 125m long and is terminated in 300-ohm load. What is the SWR for this situation? Find the reflection coefficient.
capacitance
3. The impedance which is constant at any point on the transmission line is *
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Zo.
None of them
Zin
OZ
4. The propagation constant consists of two terms. the first term is the
attenuation constant, and the second term denotes the phase constant. For
Ingless transmission line, the attenuation constant becomes
The capacitance per unit length and the
characteristic impedance of a lossless transmission
line are C and Zo respectively. The velocity of a
travelling wave on the transmission line is
(a) Z.C
(c) Zo
C
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(b) Z.C
(d) Z
Chapter 5 Solutions
Power System Analysis and Design (MindTap Course List)
Ch. 5 - Representing a transmission line by the two-port...Ch. 5 - The maximum power flow for a lossy line is...Ch. 5 - Prob. 5.21MCQCh. 5 - A 30-km, 34.5-kV, 60-Hz, three-phase line has a...Ch. 5 - A 200-km, 230-kV, 60-Hz, three-phase line has a...Ch. 5 - The 100-km, 230-kV, 60-Hz, three-phase line in...Ch. 5 - The 500-kV, 60-Hz, three-phase line in Problems...Ch. 5 - A 40-km, 220-kV, 60-Hz, three-phase overhead...Ch. 5 - A 500-km, 500-kV, 60-Hz, uncompensated three-phase...Ch. 5 - The 500-kV, 60-Hz, three-phase line in Problems...
Ch. 5 - A 350-km, 500-kV, 60-Hz, three-phase uncompensated...Ch. 5 - Rated line voltage is applied to the sending end...Ch. 5 - A 500-kV, 300-km, 6()-Hz, three-phase overhead...Ch. 5 - The following parameters are based on a...Ch. 5 - Consider a long radial line terminated in its...Ch. 5 - For a lossless open-circuited line, express the...Ch. 5 - A three-phase power of 460 MW is transmitted to a...Ch. 5 - Prob. 5.55PCh. 5 - Consider the transmission line of Problem 5.18....Ch. 5 - Given the uncompensated line of Problem 5.18, let...
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- A lossless transmission line (TL) has a characteristic impedance of Zo= 250 N, a load impedance of ZR = 125 – j150 N and its operating frequency is fo Smith chart to evaluate the following parameters: 150 MHz. Use 1) The load admittance YR. 2) The reflection coefficient [Kr|ZOR 3) The voltage standing wave ratio (VSWR). Then calculate the maximum and minimum impedance in this TL, (Zmax and Zmin). 4) The distance from load to the nearest maximum (dmax) and minimum voltage positions (dmin) (in meter). 5) Find Zd at a distance away from a load by d= 3.3 2. Then calculate Zd using TL equation.arrow_forwardA lossless transmission line has a capacitance per unit length of 90 uF/m (microFarad/meter) and an inductance per unit length of 1 nH/m. The load impedance ZI is purely resistive. Both the load impedance and the generator impedance are 50 ohms. Source voltage amplitude is unknown at this point. Find the characteristic impedance and the propagation velocity for this transmission line!arrow_forwardFor a lossless trabsmisison line, the characteristic impedance is 80 ohm. If the capacitance per unit length is 1.5 mh/m then what will be the inductance per unit length.arrow_forward
- g) Why the Capacitance effect is neglected in Short Transmission Line. h) Distinguish between Lumped or Distributed elements in a Transmission Line.arrow_forwardb) A 6052 characteristic impedance transmission line is fed by a DC source of 100V with an internal resistance of 4002. The line is 200m long and has a dielectric constant of 2.25. The load impedance is 12002. Calculate: i. The load reflection coefficient. ii. The source reflection coefficient. iii. What is the voltage at the source terminals just before AND just after 2us?arrow_forwardThe 50 ohm transmission line isterminated with an unknown load. The magnitude of the reflection coefficient is R=0.5.Thedistancebetween the voltage maximum and the load is0.15 lambda. What is the imaginary partof the load impedance?arrow_forward
- A lossless transmission line with characteristic impedance of Z0 = 1000 and length l = 52cm was terminated with a load of Zy- 30 + j500. Based on the given, a) Find the reflection coefficient at the load and the standing wave ratio of the voltage on the line (GDDO). B) Find the impedance and admittance at the line input. (For f = 750MHZ) c) For f = 750MHZ, find the impedance and admittance values 2cm away from the load. (2 = 10 will be accepted.)arrow_forwardA lossless transmission line has Z₁ = 100 Q, terminated by an unknown impedance. The termination is found to be at a maximum of the voltage standing wave, and the Voltage Standing Wave Ratio (VSWR) is 5. The value of the terminating impedance isarrow_forwardA lossless transmission line is terminated with a 100 Ohms load (RL=100 Ohms). If the standing wave ratio (SWR) on the line is 1.5, find : a) The two possible values for the characteristic impedance (Zo) of the line b) The input impedance (Zin) towards the load end of the line at a distance l = from the load (ZL) as shown in the figure. R, Zo l = 1/2 Zinarrow_forward
- three-phase, 60 Hz transmission line has an inductance of 1.378 mH per Km per phase and a capacitance of 0.0086 uF per Km per phase. The line is 500 Km long, and for the purpose of this problem, a lossless line is assumed. D the phase constant B is the line surge impedance is Zc + and the wavelength A isarrow_forwardA 752 lossless transmission line is terminated with a load impedance equals to 105-jl1502. The length of the line is 0.35 r, use a smith chart to calculate: 1. The reflection coefficient at the load (magnitude and angle). 2. SWR, Zmaxy, Zmin, and the load admittance. 3. The input impedance of the TL. 4. The impedance as seen from a distance d=0.26 ^ from the load.arrow_forwardA three-phase, 60-Hz. 765-kv transmission line has an inductance of 1.0071 mH/Km per phase and a capacitance of 0.0099 uF/Km per phase. The line is 500 Km long, and for the purpose of this problem, a lossless line is assumed. Determine the transmission line constant A Select one: a 0.199 0.828 c. 0.165 d 0.999 De None of these A three-phase transmission transposed line is composed of four ACSR 272000 mil conductor per phase with horizontal configuration as shown in the figure below. Each conductor has a leis 45 cm and the GMD) # 17-638 m of 14173 cm. Thearrow_forward
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