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 4, Problem 4.3P
A transmission-line cable with a length of 2 km consists of 19 strands of identical copper conductors, each 1.5 mm in diameter. Because of the twist of the strands, the actual length of each conductor is increased by
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The puncture resistance of the insulator used in an AA cable with a conductor cross section of 150 mm2 is 200 kV / cm for the most convenient layout. Which of the following is the maximum effective value of the voltage that can be applied to this cable with relative dielectric coefficient kapasitesi, = 4.4, and the capacity of the unit length of the cable? Take the dielectric constant 8,86.10 ^ -12)
A 10 km long, transmission-line has two parallel conductors placed 2 metres apart. The diameter of each conductor is 1·4 cm. Calculate the DC resistance of 1 km length of the conductor [Resistivity of material = 2.83x10-8 Ω-m]
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Chapter 4 Solutions
Power System Analysis and Design (MindTap Course List)
Ch. 4 - ACSR stands for Aluminum-clad steel conductor...Ch. 4 - Overhead transmission-line conductors are bare...Ch. 4 - Alumoweld is an aluminum-clad steel conductor....Ch. 4 - EHV lines often have more than one conductor per...Ch. 4 - Shield wires located above the phase conductors...Ch. 4 - Conductor spacings, types, and sizes do have an...Ch. 4 - A circle with diameter Din.=1000Dmil=dmil has an...Ch. 4 - An ac resistance is higher than a dc resistance....Ch. 4 - Prob. 4.9MCQCh. 4 - Transmission line conductance is usually neglected...
Ch. 4 - Prob. 4.11MCQCh. 4 - Prob. 4.12MCQCh. 4 - For a single-phase, two-wire line consisting of...Ch. 4 - For a three-phase three-wire line consisting of...Ch. 4 - For a balanced three-phase positive-sequence...Ch. 4 - A stranded conductor is an example of a composite...Ch. 4 - lnAk=lnAk True FalseCh. 4 - Prob. 4.18MCQCh. 4 - Expand 6k=13m=12Dkm.Ch. 4 - Prob. 4.20MCQCh. 4 - For a single-phase two-conductor line with...Ch. 4 - In a three-phase line, in order to avoid unequal...Ch. 4 - For a completely transposed three-phase line...Ch. 4 - Prob. 4.24MCQCh. 4 - Does bundling reduce the series reactance of the...Ch. 4 - Does r=e14r=0.788r, which comes in calculation of...Ch. 4 - In terms of line-to-line capacitance, the...Ch. 4 - For either single-phase two-wire line or balanced...Ch. 4 - Prob. 4.29MCQCh. 4 - Prob. 4.30MCQCh. 4 - Prob. 4.31MCQCh. 4 - Prob. 4.32MCQCh. 4 - Prob. 4.33MCQCh. 4 - Prob. 4.34MCQCh. 4 - The affect of the earth plane is to slightly...Ch. 4 - When the electric field strength at a conductor...Ch. 4 - Prob. 4.37MCQCh. 4 - Prob. 4.38MCQCh. 4 - Considering two parallel three-phase circuits that...Ch. 4 - The Aluminum Electrical Conductor Handbook lists a...Ch. 4 - The temperature dependence of resistance is also...Ch. 4 - A transmission-line cable with a length of 2 km...Ch. 4 - One thousand circular mils or 1 kcmil is sometimes...Ch. 4 - A 60-Hz, 765-kV, three-phase overhead transmission...Ch. 4 - A three-phase overhead transmission line is...Ch. 4 - If the per-phase line loss in a 70-km-long...Ch. 4 - A 60-Hz, single-phase two-wire overhead line has...Ch. 4 - Prob. 4.9PCh. 4 - A 60-Hz, three-phase three-wire overhead line has...Ch. 4 - Prob. 4.11PCh. 4 - Find the inductive reactance per mile of a...Ch. 4 - A single-phase overhead transmission line consists...Ch. 4 - Prob. 4.14PCh. 4 - Find the GMR of a stranded conductor consisting of...Ch. 4 - Prob. 4.16PCh. 4 - Determine the GMR of each of the unconventional...Ch. 4 - A 230-kV, 60-Hz, three-phase completely transposed...Ch. 4 - Prob. 4.19PCh. 4 - Calculate the inductive reactance in /km of a...Ch. 4 - Rework Problem 4.20 if the bundled line has (a)...Ch. 4 - Prob. 4.22PCh. 4 - Prob. 4.23PCh. 4 - Prob. 4.24PCh. 4 - For the overhead line of configuration shown in...Ch. 4 - Prob. 4.26PCh. 4 - Figure 4.34 shows double-circuit conductors'...Ch. 4 - For the case of double-circuit, bundle-conductor...Ch. 4 - Prob. 4.29PCh. 4 - Figure 4.37 shows the conductor configuration of a...Ch. 4 - Prob. 4.32PCh. 4 - Prob. 4.33PCh. 4 - Prob. 4.34PCh. 4 - Prob. 4.35PCh. 4 - Prob. 4.36PCh. 4 - Prob. 4.38PCh. 4 - Calculate the capacitance-to-neutral in F/m and...Ch. 4 - Prob. 4.40PCh. 4 - Prob. 4.41PCh. 4 - Prob. 4.42PCh. 4 - Three ACSR Drake conductors are used for a...Ch. 4 - Consider the line of Problem 4.25. Calculate the...Ch. 4 - Prob. 4.45PCh. 4 - Prob. 4.46PCh. 4 - Prob. 4.47PCh. 4 - The capacitance of a single-circuit, three-phase...Ch. 4 - Prob. 4.49PCh. 4 - Prob. 4.50PCh. 4 - Prob. 4.51PCh. 4 - Approximately how many physical transmission...Ch. 4 - Prob. BCSQCh. 4 - Prob. CCSQCh. 4 - Prob. DCSQ
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- The puncture resistance of the insulator used in an AA cable with a conductor cross section of 150 mm2 is 200 kV / cm for the most convenient layout. Which of the following is the maximum effective value of the voltage that can be applied to this cable with relative dielectric coefficient kapasitesi, = 4.4, and the capacity of the unit length of the cable? (Take the dielectric constant of the gap -12 8,86.10)arrow_forward1. A transmission line conductor is supported from two towers at heights of 70 m above water level. The horizontal distance between the towers is 300 m. If the tension in the conductors is 1500 kg, find the clearance at a point mid-way between the towers. The size of the conductor is 0·9 cm2 and density of conductor material is 8·9 gm/cm3.arrow_forwardA 200 mm square single core copper conductor cable operating at 22kV, 50Hz has the following parrameters: external diameter of insulation, do = 73,5mm, diameter of conductor including area , di = 28,5mm. Calculate the dielectric loss of 1km length of cable if: I) The cable insulation is XPLE with er= 2,5 and tanr= 0.0003arrow_forward
- A single-core underground cable has a copper conductor of diameter 1.2cm and resistivity of 5.8x10^12 Ω.m. If the thickness of the insulating material is 1.2 cm, calculate the insulation resistance of a 5-km length of this cable in Megaohms.arrow_forwardA solid cylindrical aluminum conductor 25 km long has an area of 336,400 circular mils. Obtain the conductor resistance at 20C and 50C. Find the AC resistance per Km of the cable at 50C. Assume a skin-effect correction factor of 1.02 at 50 Hz. The resistivity of aluminum at 20C is 2.8x10-8 Ωmarrow_forwardDetermine the dielectric stress per cm which can be applied on a single core cable working at 33 KV, 3-phase system, if the value of internal diameter of sheath which investigates the most economical size of conductor is 4.85 cm.arrow_forward
- an overhead transmission line at a river crossing is supported from 2 towers at heights of 60m above the water level, the horizontal distance between the towers being 400m. If the allowable horizontal tension is 336.2 kg and the conductor heights 0.5kg/m, find the clearance between the conductor and water at a point midway between the towersarrow_forwardThe three conductors of a 3-φ line are arranged at the corners of a right angled isosceles triangle. If each equal side of this triangle is 2 m, find line-to neutral capacitance per km. Take the diameter of each conductor as 1·24 cm. The conductors are transposed at regular intervals. [0·0094 μF/km]arrow_forwardAn overhead line has the following data: Span length 160 metres, conductor diameter 0.95 cm, weight per unit length of the conductor 0.65 kg/metre. Ultimate stress 4250 kg/cm², wind pressure 40 kg/m² of projected area. Factor of safety 5.arrow_forward
- The conductors of a 10 km long, single phase, two wire line are seperated by a distance of 1.5 m. The diameter of each conductor is 1 cm. If the conductors are of copper, the inductance of the circuit is ??arrow_forwardThe three conductors of a 3-φ line are arranged at the corners of a right angled isosceles triangle. If each equal side of this triangle is 2 m, find line-to-neutral capacitance per km. Take the diameter of each conductor as 1·24 cm. The conductors are transposed at regular intervals.arrow_forwardIf the thickness of the insulating material in the problem with code COFFEE is increased by 30%, what will be the new insulation resistance of the cable? Answer in Megaohms. Code: COFFEE. A single-core cable has a conductor diameter of 13.5 mm and insulation thickness of 8.2 mm. Given the specific resistance of the insulating material as 7.5E10^8 Megaohms-cm, calculate the insulation per quarter-kilometer of the cable in Megaohms.arrow_forward
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