QUESTION 4a) Given the symmetrical components to be:Vo = 2020° V,Vi=75Z24° V,V2= 502-35° Vi. Determine the unbalanced phase voltages V, V, and V.ii. Calculate the line-to-line voltages V, Ve and V.abiii. Calculate the symmetrical components of these line-to-line voltages.b) A balanced Y-connected generator with terminal voltage Vhc = 20020° volts isconnected to balanced A-load whose impedance is 10440° /phase. The lineimpedance between the source and load is 0.5280° 2/phase. The generator neutral isgrounded through an impedance of j5 2. The generator sequence impedances aregiven by Zo = j7 2, Z1 = j15 2 and Z2 j10 2.i. Draw the positive sequence networks for this system.ii. Determine line-to-line current at the generator terminal. Assume the system isbalanced.

Since you have asked multiple questions in a single request, we will be answering only the 1st…

QUESTION 4 a) Given the symmetrical components to be: Vo = 2020° V, V1= 7524° V, V2= 504-35° V i. Determine the unbalanced phase voltages V,, V, and V.. ii. Calculate the line-to-line voltages V, Vne and V. iii. Calculate the symmetrical components of these line-to-line voltages.

QUESTION 4 a) Given the symmetrical components to be: Vo = 2020° V, V1= 7524° V, V2= 504-35° V i. Determine the unbalanced phase voltages V,, V, and V.. ii. Calculate the line-to-line voltages V, Vne and V. iii. Calculate the symmetrical components of these line-to-line voltages.

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...

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Single Phase AC Circuit

Alternating Current (AC) is a type of electric power in which the electric current changes, both in magnitude and direction, at regular intervals. This AC Circuits can deliver power in either a Single Phase system or a Three Phase system.

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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.
Choose the right answer. For all the point.
Note: It is expected from student to develop impedance matrices of three phase power system. Develop impedance matrix (Z-bus) of power system network as shown in figure. [Values are given in per unit impedance.] j3 12 j3
Q2 (a) Based on the relationship between the line and phase value of currents and voltage, show that the active power input to a three-phase balance load is v3VIcosø, where V and I are line quantities. (b) A balanced Y-connected load has phase voltage of 230 V and positive phase sequence. The impedances ZĄ, ZB, and Zc are 10230° N, respectively. (i) By taking VAB On the load side as a reference, determine all the line currents and phase voltages. (ii) Determine total real power, P, total reactive power, Q and total apparent power, S of the system. (iii) Total real power of the loads can be measured using two wattmeter methods. Draw the connection of the two wattmeters if their current coils are in line A and C, respectively. What is the total real power measured by each wattmeter? Prove and compare the value with Q2(b)(ii).
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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)
5) Non minimum phase systems are also non causal. ) True False
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Is it true??
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