An overhead 3-phase transmission line delivers 5000 kW when a current of 150 A is flowing through the transmission line. If the impedance of the transmission line is 9 Ohm and reactance is 6 Ohm. Determine: (i) Resistance of the transmission line (ii) Three-phase power loss (iii) Percentage Efficiency

An overhead 3-phase transmission line delivers 5000 kW when a current of 150 A is flowing through the transmission line. If the impedance of the transmission line is 9 Ohm and reactance is 6 Ohm. Determine: (i) Resistance of the transmission line (ii) Three-phase power loss (iii) Percentage Efficiency

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

Chapter5: Transmission Lines: Steady-state Operation

Section: Chapter Questions

Problem 5.7P

See similar textbooks

Similar questions

Let a series RLC network be connected to a source voltage V, drawing a current I. (a) In terms of the load impedance Z=ZZ, find expressions for P and Q, from complex power considerations. (b) Express p(t) in terms of P and Q, by choosing i(t)=2Icost. (c) For the case of Z=R+jL+1/jC, interpret the result of part (b) in terms of P,QL, and Qc. In particular, if 2LC=1, when the inductive and capacitive reactances cancel, comment on what happens.
A balanced -connected impedance load with (12+j9) per phase is supplied by a balanced three-phase 60-Hz,208-V source, (a) Calculate the line current, the total real and reactive power absorbed by the load, the load power factor, and the apparent load power, (b) Sketch a phasor diagram showing the line currents, the line-to-line source voltages, and the -load currents. Use Vab as the reference.
A three-phase line with an impedance of (0.2+j1.0)/ phase feeds three balanced three-phase loads connected in parallel. Load 1: Absorbs a total of 150 kW and 120 kvar. Load 2: Delta connected with an impedance of (150j48)/phase. Load 3: 120 kVA at 0.6 PF leading. If the line-to-neutral voltage at the load end of the line is 2000 v (rms), determine the magnitude of the line-to-line voltage at the source end of the line.
A transmission line has an actual impedance of 18 ohms, compute for the per unit impedance of this line assume Vbase = 2400, Sbase = 100kVA power factor at unity p.f. round answer to 4 decimal places.
A certain generating plant in manila has 40kV, three phase transmission line to supply a 12MVA load at 30kV and 0.8 power factor. Find the resistance and reactance of the line if the length of the transmission line is 4,000 meters and the efficiency is 88%.
A 30 mile, 3-phase transmission line delivers 8,000 kW at 33 kV, p.f. 0.8 lagging. The resistance and reactance of single conductor are 0.6 ohm and 0.72 ohm respectively per mile. Find the percent efficiency of the line.
2. Solve the following problem: A THREE-PHASE PLANT CONSUMES 600 KVA, WITH A VOLTAGE OF 2400 VOLTS AND A POWER FACTOR OF 0.8 BEHIND. a) DETERMINE THE EQUIVALENT DELTA IMPEDANCE OF THE PLANT. b) IF THE PLANT WERE A STAR, CALCULATE THE RESISTANCE, REACTANCE AND THE CORRESPONDING PASSIVE ELEMENT.
A 210V, 50 Hz, single phase radial distribution system, the resistance of the wire is 0.0008 ohm/m supply and return. Two loads are connected and it consumes 10 and 10 A respectively and are fed from the cable at distance of 15 and 15 respectively. Calculate the voltage available across load 1 and 2
100 km of single-phase transmission line, 800 kVA power 8 kV, is carried with 0.9 reverse power factor. The resistance of one kilometer of the line is 42 mΩ, and the reactance of one kilometer of the line is 0.646 Ω. Find the voltage at the beginning of the line and the efficiency of the line accordingly.
470 kVA load at 12 kV. Its resistance is 7 Ω and inductive reactance is 7 Ω if the load power factor is 0.9 lagging. Determine the Current through the line , Sending end voltage , Sending end power factor , Regulation of transmission line , Efficiency of transmission line Note:please do not handwriting
A short 3 phase transmission line, connected to a 33kV, 50 Hz generating station at the sending end is required to supply a load of 10Megawatts at 0.8 power factor lagging, 30kV at the receiving end. If the minimum transmission line efficiency is to be limited to 96%, estimate the per phase values of resistance and inductance of the line.
a) High Voltages are preferred for Transmission of Electricity. Why? b) Why Generation Voltage Levels are low in the range of 11 kV/ 33 kV etc? c) Why ACSR Conductors are preferred over Copper Conductors? d) Overhead Transmission Lines are preferred for Transmission of Power for Long Distances, why? e) Alternating Current is preferred over Direct Current in Power System, Why? f) Write the Installed Generation Capacity of Sultanate of Oman with current energy share of Conventional and Non-Conventional Energy Sources. g) Why the Capacitance effect is neglected in Short Transmission Line. h) Distinguish between Lumped or Distributed elements in a Transmission Line.