Q5. A single phase overhead transmission line has a supply voltage of 34 kV and a sending end current of magnitude 40 A at 0-8 p.f. lagging is feeding a certain load. The total resistance and inductance of the line are 5 0 and 21 mH respectively. Draw the practical circuit used and the devices necessary to perform this experiment. Then calculate the sending end power, receiving end current, voltage, power factor, receiving end line efficiency. power and Vs Is Cosos R L Ps Ir Vr Cosor Pr 34000 40 0.8 5 21e-3

Q5. A single phase overhead transmission line has a supply voltage of 34 kV and a sending end current of magnitude 40 A at 0-8 p.f. lagging is feeding a certain load. The total resistance and inductance of the line are 5 0 and 21 mH respectively. Draw the practical circuit used and the devices necessary to perform this experiment. Then calculate the sending end power, receiving end current, voltage, power factor, receiving end line efficiency. power and Vs Is Cosos R L Ps Ir Vr Cosor Pr 34000 40 0.8 5 21e-3

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

Chapter2: Fundamentals

Section: Chapter Questions

Problem 2.43P: A three-phase line, which has an impedance of (2+j4) per phase, feeds two balanced three-phase loads...

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A three-phase line, which has an impedance of (2+j4) per phase, feeds two balanced three-phase loads that are connected in parallel. One of the loads is Y-connected with an impedance of (30+j40) per phase, and the other is -connected with an impedance of (60j45) per phase. The line is energized at the sending end from a 60-Hz, three-phase, balanced voltage source of 1203V (rms. line-to-line). Determine (a) the current, real power. and reactive power delivered by the sending-end source: (b) the line-to-line voltage at the load: (C) the current per phase in each load: and (d) the total three-phase real and reactive powers absorbed by each load and by the line. Check that the total three- phase complex power delivered by the source equals the total three-phase power absorbed by the line and loads.
A small manufacturing plant is located 2 km down a transmission line, which has a series reactance of 0.5/km. The line resistance is negligible. The line voltage at the plant is 4800V(rms). and the plant consumes 120kW at 0.85 power factor lagging. Determine the voltage and power factor at the sending end of the transmission line by using (a) a complex power approach and (b) a circuit analysis approach.
Under balanced operating conditions, consider the three-phase complex power delivered by the three-phase source to the three-phase load. Match the following expressions, those on the left to those on the right. (i) Realpower, P3 (a) (3VLLIL)VA (ii) Reactive power, Q3 (b) (3VLLILsin)var (iii) Total apparent power, S3 (c) (3VLLILcos)W (iv) Complex power, S3 (d) P3+jQ3 Note that VLL is the rms line-to-line voltage, IL is the rms line current, and is the power-factor angle.
S.1) The serial impedance per phase of a three-phase 45 km energy transmission line is 2 + j4 / phase. A load with a power factor of cos2 = 0.8 forward is fed from the end of the line. Since the line voltage at the beginning and end of the line of the energy transmission line is wanted to be kept constant at 115 kV, a) Active and reactive powers drawn from the beginning and end of the line, b) Calculating the power consumed along the energy transmission line and the efficiency of the line. S.2) Line constants of an energy transmission line are given as A = D = 0.8746 + j0, B = 0 + j128.34, C = j0.0018316 S. At the beginning of the line, it is desired to write 1920 MW active power and 600 MVAr reactive power lines under 7650kV line voltage. According to this business, a) Calculate the line end magnitudes (U2, I2 and P2). b) What value does the end voltage take when the load fed from the end of the line is deactivated? S.3) The length of a phased energy transmission line with a…
a short three phase transmission line connected to 33kv 50 hertz generating station at starting and is required to supply a load of 10 MW at pointed start lagging power factor at 30 KV addresses in that is the minimum transmission efficiency is to be determined96% estimate the per face value of resistance and inductance of a line
The annual load duration curve of a power supply system may be considered as straight line from 40 MW to 8 MW. The load factor of the system is ?
A 3-ph, 60 Hz, 200 km long, 220 kV transmission line has per km per phase constants of resistance 0.033 Ω, inductive reactance 0.33 Ω, capacitive susceptance 3.3x10 -6 mho. The load at the receiving end of the line is 500 MW at 0.95 power factor leading and voltage has dropped to 209 kV. Using the PI model, calculate the voltage, current and power factor at the sending end. Please answer in typing format solution please only typing format Please I will like it please reply to
Q5. A single phase overhead transmission line has a supply voltage of 34 kV and a sending end current of magnitude 40 A at 0-8 p.f. lagging is feeding a certain load. The total resistance and inductance of the line are 5 and 21 mH respectively. Draw the practical circuit used and the devices necessary to perform this experiment. Then calculate the sending end power, receiving end current, voltage, power factor, receiving end power and line efficiency Vs 34000 Is 40 Cosos 0.8 R 5 Ps Ir Vr Cosor Pr n 21e-3
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.
The sending-end voltage in the circuit seen is adjusted so that the load voltage is always 13,800 V(rms). The variable capacitor is adjusted until the average power dissipated in the line resistance is minimum. 1. a) If the frequency of the sinusoidal source is 60 Hz, what is thevalue of the capacitance in microfarads?2. b) If the capacitor is removed from the circuit, what percentageincrease in the magnitude of Vs is necessary to maintain 13,800V(rms) at the load?3. c) If the capacitor is removed from the circuit, what is thepercentage increase in line loss?
S.2) The serial impedance of the 300 km power transmission line is 23 + j75 ohm / phase and the shunt acceptance is j500 microS / phase. A power of 50 MW with a power factor of 0.88 under 220 kV interphase voltage from the end of the power transmission line being shot. Using these data of the energy transmission line, a) Characteristic impedance of the energy transmission line, b) Natural apparent power of the energy transmission line according to the 220 kV interphase operating voltage, c) The values of the line parameters A, B, C and D of the transmission line using hyperbolic functions, d) Calculate the maximum power that the power transmission line can transmit.
a) You have been employed as an electrical engineer by a power transmission company to design a short transmission line to supply power to a light-industrial load consumer with power system specification as follows, a 3-ph, 60Hz overhead short transmission line with a line-to-line voltage of 23KV at the load end, line impedance of 2.48 ±j6.57Ω/phase, the industry has a cumulative consumption of 9MW with a power factor of 0.85 of lagging as a result of several induction motor on its production lines.As part of the regulations for connections to the grid, you are to provide justifications and values to the Energy Commission of Ghana.(i) What would be value of the voltage between the live conductor and the neutral, between live and live voltages at the industrial premises of the factory?(ii) What load angle would expect the factory to be operating at?