THESE ARE THE QUESTIONS FROM THE SUBJECT POWER SYSTEMFUNDAMENTALS AND THE CHAPTER IS PERFORMANCE OF TRANSMISSIONLINES AND THE TOPIC IS SHORT TRANSMISSION LINES THE ANSWERS AREGIVEN WITH THE QUESTION PLEASE DO ALL THE QUESTIONS PROPERLY„DONOT SKIP ANY STEP AND DO YOUR BEST4.) Estimate the distance over which a load of 15000 kW at 0-85 p.f. can be delivered bya 3-phase transmission line having conductors of steel-cored aluminium each ofresistance 0-905 O/phase per kilometre. The voltage at the receiving end is to be 132kV and the loss in transmission is to be 7-5% of the load. [69-55 km]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 0-40 and 0-3 Q respectively. If the voltage at the supply end is maintainedat 11 kv, calculate:(i) ceceiving end voltage (line-to-line)(ii) line current(ii) transmission efficiency. [(i) 10.46 kv (ii) 207 A (ii) 95%]6). A short 3-0 transmission line with an impedance of (5 +j 20) 0 per phase has sending end andreceiving end voltages of 46-85 kV and 33 kV respectively for some receiving end load at a p.f.of 0-8lagging. Determine:(i) power output(i sending end power factor [(i) 22-86 kW (ii) 0-657 lag

Answered: Image /qna-images/answer/abcb5e96-e69e-4a69-a9b2-e5d818174088.jpg

(ii) transmission efficiency. [(i) 10.46 kv (ii) 207 A (ii) 95%] 6). A short 3-0 transmission line with an impedance of (5 +j 20) a per phase has sending end and receiving end voltages of 46-85 kV and 33 kv respectively for some receiving end load at a p.f.of 08 lagging. Determine () power output (i sending end power factor [(i) 22-86 kw (ii) 0-657 lag

(ii) transmission efficiency. [(i) 10.46 kv (ii) 207 A (ii) 95%] 6). A short 3-0 transmission line with an impedance of (5 +j 20) a per phase has sending end and receiving end voltages of 46-85 kV and 33 kv respectively for some receiving end load at a p.f.of 08 lagging. Determine () power output (i sending end power factor [(i) 22-86 kw (ii) 0-657 lag

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 ...

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