3. A two wire DC ring main distributor ABCDEA is fed at point C with 230V supply. The resistancesof go and return conductors of each section AB, BC, CD, DE and AE are 0.1 2 each. The mainsupplies the loads of 20A at A, 10A at B, 10A at D, 30A at E. Estimate:i. Voltage at each load pointMinimum consumer voltage.ii.

Ring Mains Distributor: It is type of DC distributor. As indicated in figure, the distributor is in…

3. A two wire DC ring main distributor ABCDEA is fed at point C with 230V supply. The resistances of go and return conductors of each section AB, BC, CD, DE and AE are 0.1 0 each. The main supplies the loads of 20A at A, 10A at B, 10A at D, 30A at E. Estimate: Voltage at each load point Minimum consumer voltage. i. ii.

3. A two wire DC ring main distributor ABCDEA is fed at point C with 230V supply. The resistances of go and return conductors of each section AB, BC, CD, DE and AE are 0.1 0 each. The main supplies the loads of 20A at A, 10A at B, 10A at D, 30A at E. Estimate: Voltage at each load point Minimum consumer voltage. i. ii.

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 4.1P: The Aluminum Electrical Conductor Handbook lists a dc resistance of 0.01558 ohm per 1000 ft at 20C...

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Similar questions

A three-phase overhead transmission line is designed to deliver 190.5 M VA at 220 kV over a distance of 63 km, such that the total transmission line loss is not to exceed 2.5 of the rated line MVA. Given the resistivity of the conductor material to be 2.84108-m, determine the required conductor diameter and the conductor size in circular mils. Neglect power losses due to insulator leakage currents and corona.
For either single-phase two-wire line or balanced three-phase three-wire line with equal phase spacing D and with conductor radius r, the capacitance (line-to-neutral) in F/m is given by Can=.
Three ACSR Drake conductors are used for a three-phase overhead transmission line operating at 60 Hz. The conductor configuration is in the form of an isosceles triangle with sides of 20, 20, and 38 ft. (a) Find the capacitance-to-neutral and capacitive reactance-to-neutral for each 1-mile length of line. (b) For a line length of 175 mi and a normal operating voltage of 220 kV, determine the capacitive reactance-to-neutral for the entire line length as well as the charging current per mile and total three-phase reactive power supplied by the line capacitance.
The Aluminum Electrical Conductor Handbook lists a dc resistance of 0.01558 ohm per 1000 ft at 20C and a 60-Hz resistance of 0.0956 ohm per mile at 50C for the all-aluminum Marigold conductor, which has 61 strands and whose size is 1113 kcmil. Assuming an increase in resistance of 2 for spiraling, calculate and verify the dc resistance. Then calculate the dc resistance at 50C, and determine the percentage increase due to skin effect.
PowerWorid Simulator case Problem 3_60 duplicates Example 3.13 except that a resistance term of 0.06 per unit has been added to the transformer and 0.05 per unit to the transmission line. Since the system is no longer lossless, a field showing the real power losses has also been added to the oneline. With the LTC tap fixed at 1.05, plot the real power losses as the phase shift angle is varied from 10 to +10 degrees. What value of phase shift minimizes the system losses?
A three-phase, three wire, CBA system with a line voltage of 120 Volt, has three impedances of 30 /60ᴼ in Deltaconnection. Assume that VCA is the reference vector. Determine the line current and draw the voltage-currentphasor diagram.
A three-phase transmission line is designed to deliver 190.5 MVA at 220 kV over a distance of 63 km. The total transmission line loss is not to exceed 2.5 percent of the rated line MVA. If the resistivity of the conductor material is 2.84 × 10−8Ω − ?, determine the required conductor diameter and the conductor size in circular mils. [7]b) Derive an expression for the inductance of a solid conductor due to internal flux linkage
Given a three-phase load of 125 MW at power factor of 0.8 lagging, operating at 69kV, with a transmission line efficiency of 97% and voltage regulation of 95%, and the line length of 50 km, design a transmission line system and determine the best conductor configuration, conductor resistance and inductance, and conductor radius values to achieve the efficiency and voltage regulation set. Assume a two-bundled conductor configuration with GMR of 0.0496 m and bundle spacing of 30 cm.
2. A single phase load of 5 MW is transmitted by a pair of overhead conductors. If a third conductor of the same cross-section and material be added and 3-phase supply be thus substituted for the original single phase, calculate the 3-phase load which can now be transmitted if the voltage between the conductors and the percentage loss in the lineremains unchanged.
Given a three-phase load of 125 MW at power factor of 0.8 lagging, operating at 69kV, with a transmission line efficiency of 97% and voltage regulation of 95%, and the line length of 50 km, design a transmission line system and determine the best conductor configuration,conductor resistance and inductance, and conductor radius values to achieve the efficiencyand voltage regulation set. Assume a two-bundled conductor configuration with GMR of 0.0496 m and bundle spacing of 30 cm.
1. The engineering calculations for an 800-ampere service-entrance call for two 500 kcmilcopper conductors per phase connected in parallel. The neutral conductor calculations show that the neutral conductors need only be 3 AWG copper conductors. Theriser diagram shows two rigid metal conduits, each containing three 500 kcmil phaseconductors and one 1/0 AWG neutral conductor. Why is the neutral conductor sized asa 1/0 AWG, or is this a mistake?
The total conductor cross section of a 537.40 kV (Peak value) three-phase overhead line with a length of 100 km is 517 mm2 and the conductor diameter is 29.6 mm. The roughness factor of the conductors is 0.8 and the distance between the conductors is 6 m. The ambient pressure along the line is 650 mmHg and the temperature is 15oC. Since there is corona discharge in only 5 km of this line, find the total Corona loss lost to the line using the Peek equation (Ed=30kVpeak/cm for Air). I would be very happy if you could be quick. :)