Find:1. Voltage at the source (no capacitors are installed)2. Capacitors are installed at the load so that the power factor of the load is improvedto 0.95. What would be the voltage at the source in this case?3. How much money could be saved in loss reduction in the transmission lineannually due to the installation of capacitors if the Load Factor (LdF) = 0.7, thereare 8760 hours in a year, and energy cost is $0.007/KwHr? (See commentsbelow).4. Compare results and make conclusions5. If the voltage drop is above the standard, investigate the effect of raising voltage to34.5 kV. Note, that conductor spacing at 34.5 kV is 54 inches. LineLoadCapacitorA three-phase system is represented as shown above.Line:42in42 inLine is selected to be AAC #336.4 with ampacity of 513ADiameter of each conductor is d = 0.666 in or 5.03 mmDistance between conductors D= 42 inThe length of the line is 1 = 20 kmResistance per unit length is r= 0.63 Ohms/1000 ft (there are 0.3048km in 1000ft)Load:P (kW) = 1600Power factor = 0.75Voltage at the load V = 13.8 kV

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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 4.23P

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Figure 4.37 shows the conductor configuration of a three-phase transmission line and a telephone line supported on the same towers. The power line carries a balanced current of 250 A/phase at 60 Hz, while the telephone line is directly located below phase b Assume balanced three-phase currents in the power line. Calculate the voltage per kilometer induced in the telephone line.
For the overhead line of configuration shown in Figure 4.33 operating at 60 Hz and a conductor temperature of 700C, determine the resistance per phase, inductive reactance in ohms/mile/phase, and the current-carrying capacity of the overhead line. Each conductor is ACSR Cardinal of Table A.4.
Shield wires located above the phase conductors protect the phase conductors against lightning. True False
Determine the bus admittance matrix (Ybus) for the three-phase power system shown in Figure 6.23 with input data given in Table 6.11 and partial results in Table 6.12. Assume a three-phase 100 MVA per unit base. TABLE 6.11 Bus input data for Problem 6.20 TABLE 6.12 Partially Completed Bus Admittance Matrix (Ybus) for Problem 6.30
Three conductors of a 3-phase overhead line are arranged in a horizontal plane in the order a-b-c, distance between a and b is 6 m, b and c is spaced 6 m apart. The diameter of each line conductor is 1.5 cm. Calculate the Inductance per phase per km (L1) for this arrangement. Calculate Inductance per phase per km(L2) if the spacing between the conductors are reduced by half. Calculate the Ratio of L2 with respect to L1.
Please solve part (b) (a) Suppose a completely transposed 60-Hz three-phase line has flat horizontal phase spacing with 10 m between adjacent conductors. The conductors are 1,590,000 cmil ACSR with 54/3 stranding. Line length is 200 km. Assume the line voltage is 345 kV, at 60 Hz. i) Calculate the inductance in H/m. ii) The inductive reactance in ohm/m. b) Now let’s replace the conductors of the 1,590,000 cmil conductors with two 795,000 cmil ACSR 26/2 conductors, as shown in Figure below. Bundle spacing is 0.40 m. Flat horizontal spacing is retained, with 10 m between adjacent bundle centers. Investigate that what will be the impact on transmission line parameter by changing the radius of conductor. And by applying the bundle conductors concept calculate the following; i) The inductive reactance of the line and compare it with part (a). iii) Also calculate the capacitive reactance line -to-neutral in ohm/m/phase. iv) The capacitive reactance line to…
2. A single phase transmission line has two parallel conductors 3 m apart, the diameter ofeach conductor being 2.2 cm. calculate the loop inductance per conductor per km length ofthe line if the material of the conductor is (i) copper (ii) steel with relative permeability of110.
Suppose a completely transposed 60-Hz three-phase line has flat horizontal phase spacing with 10 m between adjacent conductors. The conductors are 1,590,000 cmil ACSR with 54/3 stranding. Line length is 200 km. Assume the line voltage is 345 kV, at 60 Hz. i) Calculate the inductance in H/m. ii) The inductive reactance in ohm/m.
PROBLEM NO. 2 A Three-Phase Transmission Line has three conductors spaced equally at 2 meters apart. The radius of each conductor is 0.54 cm. Calculate the Inductance in Henry per meter. Write your Final Answer with correct Engineering Notation and SI UNIT.
A 20km overhead 3-phase transmission line delivers 5500 kVA at 22 kV at 0.7 lagging. The resistance and inductive reactance of each conductor is 0.25 ohms and 0.35 ohms per kilometer respectively. Determine: i) line Current ii. sending end voltage iii) percentage regulation iv) transmission efficiency
An overhead 3-phase transmission line delivers 1200KW at 22KV at 0.8 power factor lagging. The length of the line is 25 Km . The resistance and reactance of conductor are 0.25ohm per Km and 0.30ohm per Km. Determine: 1) Sending end voltage 2) Percentage regulations 3) Sending end power factor 4) Transmission efficiency
Please in 15 minutes VERY EASY! Line conductors with 3-phase, 50Hz, “68” kV values are positioned horizontally as shown in the figure. The diameter of the conductors is “1.29” cm and the line length is “110” km. Find the following according to these values? (ε0=8*854*10-12F/m) a-) Find the capacitance value of a phase? b-) Find the capacitive reactance value of a phase? c-) Find the current value that will flow from a single phase line? (charge current, using Capacitive reactance)

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