Line-to-ground voltages V = 28020°, V, =2502 - 110°, and bg ag V=2902130° volts are applied to a balanced 4-load consisting of cg 12+j16 ohms per branch. i. Calculate the sequence components of the line-to-ground voltages. ii. Draw the sequence networks. iii. Calculate the sequence components I I, and I of the phase 0' 1' currents.

Line-to-ground voltages V = 28020°, V, =2502 - 110°, and bg ag V=2902130° volts are applied to a balanced 4-load consisting of cg 12+j16 ohms per branch. i. Calculate the sequence components of the line-to-ground voltages. ii. Draw the sequence networks. iii. Calculate the sequence components I I, and I of the phase 0' 1' currents.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

See similar textbooks

Similar questions

Problem 3.5: From a 3-phase, 480 V generator switchboard, a feeder takes 3-phase power to two equipment at the other end via cable and trans- former with the combined series impedance Z = 0.04 + j 0.09 N per phase. The voltage at receiving end point A rises and falls as a large 3-phase, 500 kVA load at point A varies over time. The small 1 kVA load, also connected at point A, remains online continuously, and must accommodate the voltage variations at point A with the 500 kVA load fully on or fully off. Determine the voltage range that the 1 kVA load will see, over which it must perform within its specifications.
The sequence component line-to-line voltages of a three-phase, 4-wire system are the following: Vab0 = 60cis(-60); Vab1 = 80cis(-12); and Vab2 = 120 cis(40) volts. What is the magnitude of Vbc in volts?
A 4-bus three-phase power system consists of the following equipment: • Generator 1 connected to bus 1 with a rated power of 20MVA, rated voltage of 20 kV, and a series reactance of 0.4 p.u. • Generator 2 connected to bus 5, with a rated power of 12MVA, rated voltage of 10 kV, and a series reactance of 0.3 p.u. Transformer 1 connected between buses 1 and 2, is wye-wye connected with a rated power of 20 MVA, rated voltages 20/100 kV, and a series reactance of 0.1 p.u. • Transformer 2 connected between buses 4 and 5, is wye-wye connected with a rated power of 12 MVA, rated voltages 12/110 kV, and a series reactance of 0.15 p.u. • Transmission Line 2-3 connects buses 2 and 3 and had a series impedance of 50 + j75 ohms. • Transmission Line 3-4 connects buses 3 and 4 and had a series impedance of 40 + j80 ohms. • Load A connected to bus 3 and abosorbes20 MW and 10 MVAR. The voltage at bus 3 is 105 kV. 1) Draw the one-line diagram for the system. 2) Draw the per-unit, per phase…
Q2(a) Figure Q2(a) shows the spacing of a double circuit 3-phase overhead line. The phase sequence is UVW and the line is completely transposed. i) Critically assess the advantages of double circuit line over single circuit line Calculate the inductance per phase for 500 meter length of line using Table 2(a) data for the Figure Q2(a). Table 2(a) GMR of the line 0.01m Distance a-b' 6.m Distance c-c' 8.3m a b Figure Q2(a)
In single phase AC distribution system, the net drop is the difference of the drop in resistance due to the inphase component and in reactance due to quadrature component of current Select one: True False
Question 3. A three-phase impedance load balanced D a connected load in parallel with a balanced ? connected load made of bonding. D each arm for the load ?D = 6 + 6? and ? each arm for the connected load It is given as ?? = 2 + 2?. ? the connected load ?? = 1? is earthed through the neutral impedance. To this impedance load, the symmetrical component voltages ?0 = 10∠60°, ?1 = 100∠0° and ?2 = Unbalanced phase-to-earth voltages ??, ?? and ?? of 15∠200° volts were applied. a) Draw the zero, positive and negative sequence circuits. b) Find the complex powers imparted to each component circuit.
5. A 250/500V single phase transformer gave the following test results: S.C. Test О.С. Test Isc= 24A Vsc= 10V Psc= 100W Ioc= 1A Voc= 250V Рос- 80W The transformer was later connected to a 500V, 10A at 0.8 lagging power factor load, calculate: a- The equivalent primary and secondary resistance and reactance referred to primary side (Req, Xeq):
Is it true??
A three-phase transmission line and a telephone line are supported on the same towers a shown in the figure. The power line carries a 60-Hz balanced current of 200-A per phase . the telephone line is located directly below phase b. assuming balanced three-phase currents in the power line, find the voltage per kilometer induced in the telephone line. 3.6 m 3.6 m Dal Da2 Del De 4 m 11.2 m-
Connect the wires into a OPEN DELTA configuration .
In a 3-phase, 4 wire unbalanced system, the current in neutral wire is 18 A. The magnitude of zero sequence current is ?