A 230-kV, 100-km, 60-Hz three-phase overhead transmission line with a rated current of 900 A/phase has a series impedance z = 0.088 +j0.465 2/km and a shunt admit- tance y =j3.524 µS/km. (a) Obtain the nominal equivalent circuit in normal units and in per unit on a base of 100 MVA (three phase) and 230 kV (line-to-line). (b) De- termine the three-phase rated MVA of the line. (c) Compute the ABCD parameters. (d) Calculate the SIL.

A 230-kV, 100-km, 60-Hz three-phase overhead transmission line with a rated current of 900 A/phase has a series impedance z = 0.088 +j0.465 2/km and a shunt admit- tance y =j3.524 µS/km. (a) Obtain the nominal equivalent circuit in normal units and in per unit on a base of 100 MVA (three phase) and 230 kV (line-to-line). (b) De- termine the three-phase rated MVA of the line. (c) Compute the ABCD parameters. (d) Calculate the SIL.

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

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.29P: Consider three ideal single-phase transformers (with a voltage gain of ) put together as ...

See similar textbooks

Similar questions

Transmission line conductance is usually neglected in power system studies. True False
Consider three ideal single-phase transformers (with a voltage gain of ) put together as three-phase bank as shown in Figure 3.35. Assuming positive-sequence voltages for Va,Vb, and Vc find Va,Vb, and VC. in terms of Va,Vb, and Vc, respectively. (a) Would such relationships hold for the line voltages as well? (b) Looking into the current relationships, express IaIb and Ic in terms of IaIb and Ic respectively. (C) Let S and S be the per-phase complex power output and input. respectively. Find S in terms of S.
To convert a per-unit impedance from old to new base values, the equation to be used is Zp.u.new=Zp.u.old(VbaseoldVbasenew)2(SbasenewSbaseold)Zp.u.new=Zp.u.old(VbaseoldVbasenew)2(SbasenewSbaseold)Zp.u.new=Zp.u.old(VbaseoldVbasenew)2(SbasenewSbaseold)
The VSWR on an 50-Ohm transmission line is 5. The distance between successive voltageminima is 80 cm while the distance from the load to the first minimum is 30 cm. What are thereflection coefficient and load impedance
Consider the 500 kV, three phase bundled conductor line as shown in the figure below. Find the line to neutral capacitance. 0.5 m 30 mm (0) (O to Ine 15 m 15 m
In the Transmission Line Simulator, the Transmission Line is composed of which parameter/s? O A. The Shunt Conductance Only O B. The Series Impedance and Shunt Capacitance O C. The Shunt Capacitance Only O D. The Series Impedance Only
A three-phase overhead transmission line is being supported by three-disc suspension insulators; the potentials across the first and second insulator from the top are 8 kV and 11 kV respectively. Calcualte (1) the line voltage (ií) the ratio of capacitance between pin and earth to self capacitance of each unit (iií) the string efficiency..
Q2. Figure Q2 shows the single-line diagram. The scheduled loads at buses 2 and 3 are as marked on the diagram. Line impedances are marked in per unit on 100 MVA base and the line charging susceptances are neglected. a) Using Gauss-Seidel Method, determine the phasor values of the voltage at load bus 2 and 3 according to second iteration results. b) Find slack bus real and reactive power according to second iteration results. c) Determine line flows and line losses according to second iteration results. d) Construct a power flow according to second iteration results. Slack Bus = 1.04.20° 0.025+j0.045 0.015+j0.035 0.012+j0,03 3 |2 134.8 MW 251.9 MW 42.5 MVAR 108.6 MVAR
Develop a small-scale equivalent transmission line pi model (per phase) of the transmission lines with the specification given in table 1. The conductors are placed with a flat horizontal spacing of 7.25 meters. Consider that the load connected against the line 125MW at 0.85 lagging power factor. You are required to develop an equivalent model for a maximum 220V (RMS) sending and receiving end voltage and a maximum of 5A load current. Sr. NTDC Transmission Line Length Conductor No. Туре 220 kV DG Khan-Loralai Transmission Line (227 km) 227km Pheasant TABLE AJ Electrical characteristics of bare aluminum conductors steel-relnforced (ACSR)+ Reniertance Reactance per conductor 1-ft apacing. 60 Ha Ae, 60 Ha Capaitive Aluminum ares, emil Layers of Outaide aluminum diameter, in a/1,000 ft soC, D/ml GMR Induetive Stranding AL/8t De, 20°C. 20C, a/mi Code word D. t Ma-mi Waswing Partridge Ostrieh Merlin Linnet Oriole Chickndee Ibin Pelienn Flicker Hawk 266,800 206,800 300,000 336, 400 336.400…
-The voltage magnitude and phase angle are the quantities to be determined after load flow analysis for ............bus. -The total reactance of the transmission system is reduced by installing a series capacitor. Select one: True False
30) In a lightly loaded long distance EHV lines, line loading is and has a power factor: (A) Capacitive, lagging. (B) Capacitive, leading (C) Inductive, lagging (D) Inductive, leading. please contact me in whatsapp +962782974574
Consider a 3-phase, 50 HZ, 11 KV distribution system. Each of conductors is suspended by an insulator string having two identical porcelain insulators. The self-capacitance of the insulator is 5 times the shunt capacitance between link and ground. Find the voltages across two insulators.