5. A 3-phase line 3 km long delivers 3000 kW at a p.f. 0-8 lagging to a load. The resistance and reactanceper km of each conductor are 0-4Q and 0-3 2 respectively. If the voltage at the supply end is maintainedat 11 kV, calculate :240Principles of Power Syste m(i) receiving end voltage (line-to-line)(ii) line current(iii) transmission efficiency.() 10.46 kV (i) 207 A (ii) 95%]6. A short 3-0 transmission line with an impedance of (5+j 20) 2 per phase has sending end and receivingend voltages of 46-85 kV and 33 kV respectively for some receiving end load at a p.f.of 0-8 lagging.Determine :(i) power output(ii) sending end power factor7. A substation receives 6000 kVA at 6 kV, 0.8 p.f. lagging on low voltage side of a transformer from agenerating station through a 3-phase cable system having resistance of 7 2 and reactance of 2 Q perphase. Identical 6600/33000 V transformers are installed at each end, 6600 V side being delta connectedand 33000 V side star connected. The resistance and reactance of each transformer are 1 2 and 9 2() 22-86 kW (i) 0-657 lag)[6778 V]8. A short 3-phase transmission line connected to a 33kV, 50 Hz generating station at the sending end isrequired to supply a load of 10 MW at 0-8 lagging power factor at 30 kV at the receiving end. If theminimum transmission efficiency is to be limited to 96%, estimate the per phase value of resistance and[2-4 Q; 0-028 H]respectively, referred to h.v. side. Calculate the voltage at the generating station bus barsinductance of the line.9. A single phase transmission line is delivering 500 kVA load at 2 kV. Its resistance is 0-2 2 and inductivereactance is 0-4 2. Determine the voltage regulation if the load power factor is (i) 0-707 lagging (ii)0-707 leading.() 5-3% (ii) -1-65%]

As per Bartleby guidelines we are allowed to solve only one question, please asks the rest again.…

5. A 3-phase line 3 km long delivers 3000 kW at a p.f. 0-8 lagging to a load. The resistance and reactance per km of each conductor are 0-4 2 and 0-3 2 respectively. If the voltage at the supply end is maintained at 11 kV, calculate :

5. A 3-phase line 3 km long delivers 3000 kW at a p.f. 0-8 lagging to a load. The resistance and reactance per km of each conductor are 0-4 2 and 0-3 2 respectively. If the voltage at the supply end is maintained at 11 kV, calculate :

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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For the system as shown in the following figure, convert the components to same base voltage and apparent power, by choosing 100 kVA as the base kVA and 2000 V as the base voltage for the generators. Redraw the single line diagram with the new per unit values. 15 KVA 2000 V Z=j0.3 pu 25 KVA 2000 V Z=j0.15 pu G1 G2 35 KVA 2000/8000 V Z=j0.2 pu Z=30+j100 Z=60+j120 pu O pu leee 35 KVA 8000/2000 V Z=j0.3 pu 35 kVA 2000/8000 V Z=j0.25 pu G3 10 KVA 2000V Z=j0.35 pu M 30 KVA 2000 V
Solved answer ( Regulation of transmission line and Efficiency of transmission line)
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