Question

In: Electrical Engineering

A 3 phase 50Hz overhead line has the following constants: R/phase=2ohms; Xl/phase=10ohms and Y/phase=4x10^-4 siemens. The...

A 3 phase 50Hz overhead line has the following constants: R/phase=2ohms; Xl/phase=10ohms and Y/phase=4x10^-4 siemens. The line is supplying a balanced load of 24000 KVA, 0.8 pf lagging at 66KV. Compute for the sending end voltage, sending end current and efficiency of the line using:

a.Nominal T Method

b.Nominal pi Method

c.Rigorous Method

Solutions

Expert Solution


Related Solutions

A 3-Phase, 60 HZ transmission line has the following parameters: L= 2.563 x 10^(-3) H/mi R=...
A 3-Phase, 60 HZ transmission line has the following parameters: L= 2.563 x 10^(-3) H/mi R= 0.25 Ohms/mi Y= 5 x 10^(3) S/mi The line is 200 mi long and it delivers 150 MW at 220 kV and unity power factor to a substation at its receiving end. Find the efficiency and voltage regulation of the transmission line.
A 3-phase line has a resistance of 9 Ω/phase and a reactance of 23 Ω/phase. The...
A 3-phase line has a resistance of 9 Ω/phase and a reactance of 23 Ω/phase. The load at the receiving end is 130 MW at 0.8 p. f. lagging. Find the capacity of the synchronous condenser required to be connected at the receiving end to maintain the voltage at both ends of the transmission line at 132 KV.
Q4- A 480V, 50Hz, 20KVA Y-connected eight-pole synchronous generator has a per-phase synchronous impedance of 0.15+??1.1...
Q4- A 480V, 50Hz, 20KVA Y-connected eight-pole synchronous generator has a per-phase synchronous impedance of 0.15+??1.1 ?. The total mechanical and stray losses are 1.5kW. The core losses are neglected. Assume that the magnetization curve of the generator is linear. If the generator operates at full load at a unity power factor, calculate the following: a.The speed of rotation of the generator at full load. b.The voltage regulation of the generator. c.The developed torque on the shaft of the generator....
Given dy/dx = y^2 − 4y + 4 (a) Sketch the phase line (portrait) and classify...
Given dy/dx = y^2 − 4y + 4 (a) Sketch the phase line (portrait) and classify all of the critical (equilibrium) points. Use arrows to indicated the flow on the phase line (away or towards a critical point). (b) Next to your phase line, sketch the graph of solutions satisfying the initial conditions: y(0)=0, y(0)=1, y(0)=2, y(0)=3, y(0)=4. (c) Find lim y(x) x→∞ for the solution satisfying the inital condition y(0) = 2. (d) State the solution to the initial-value...
A 6kVA, 220 /24V, 50Hz single-phase transformer has the following test results: Open circuit test (measured...
A 6kVA, 220 /24V, 50Hz single-phase transformer has the following test results: Open circuit test (measured form high-voltage side): V(oc) = 220V, I(oc) = 5A, P(oc) = 150W Short circuit test (measured from low-voltage side): V(sc) = 10V, I(sc) = 28A, P(sc) = 250W Find the per-unit approximate equivalent circuit parameters of the transformer.
A4-pole,250V, 50Hz single phase induction motor has rotor frequency 2 Hz, in starting has following parameters:...
A4-pole,250V, 50Hz single phase induction motor has rotor frequency 2 Hz, in starting has following parameters: main winding Rm=2 Ω ,Xm=4 Ω and staring winding : Rs =4 Ω , XLS=2 Ω ,Xcs=8 Ω. Find : speed of motor, Im , IS, θm θs, α and p.f.
A 3 phase 450V (line-to-line), 1150rpm induction machine has the following equivalent circuit parameters. R1=0.33 Ohms,...
A 3 phase 450V (line-to-line), 1150rpm induction machine has the following equivalent circuit parameters. R1=0.33 Ohms, X1=1.3Ohms R2 = 0.25 Ohms X2 = 40Ohms. Determine the following: a) Rated stator current (per-phase) b) Input power factor c) Total power across the air gap d) The full-load torque e) Magnitude of the starting current
A 3-phase 208V line-to-line), 4 pole 1746rpm induction motor is taking 45kVA at 0.9 power factor....
A 3-phase 208V line-to-line), 4 pole 1746rpm induction motor is taking 45kVA at 0.9 power factor. The total developed torque is 2000N-m and the rotational losses are 1.5kW. Determine the following: a) The rotor copper losses b) The overall efficiency c) The stator winding resistance (per-phase)
9) R is the region bounded by the curves ? = x^3 , y=2x+4 , And...
9) R is the region bounded by the curves ? = x^3 , y=2x+4 , And the y-axis. a) Find the area of the region. b) Set up the integral you would use to find the volume of a solid that has R as the base and square cross sections perpendicular to the x-axis.
3. A 60Hz, single phase line transmits power to an inductive load that has a receiving...
3. A 60Hz, single phase line transmits power to an inductive load that has a receiving voltage of 13.8KV, reactive factor of 0.6 and 5 MVA respectively. If this line has a impedance of 1+j2 ohms per conductor, Calculate the following: The voltage at the sending end (10 pts) b. The transmission line efficiency (10 pts) c. If this line is connected in parallel to a telephone wire and the conductors of the power line is labelled a and b...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT