B.TechSemester 72022-23Hvdc Ac TransmissionKEE072

Hvdc Ac Transmission (KEE072) - AKTU Question Paper 2022-23

B.Tech · Semester 7 · Free PDF Download

This is the official AKTU Hvdc Ac Transmission Previous Year Question Paper for B.Tech Semester 7, academic session 2022-23. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.

Course:B.Tech

Semester:Semester 7

Session:2022-23

University:AKTU / UPTU

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Questions Asked in 2022-23

Hvdc Ac Transmission (KEE072) — complete question paper

Section AAttempt all questions in brief. 2x10 = 20

a
How radio interference affect s the performance of EHV AC lines?
b
Why bundled conductors are pre ferred for EHV transmission?
c
How corona power loss rela ted to frequency of supply?
d
Explain the principle of half wave transmission
e
How pollution affects the performance of EHV AC lines?
f
What is the need of testing of EHV AC lines?
g
What is the difference between controlled rectifier and unc ontrolled rectifier? What is the effect of source inductance on the average output v oltage of 1-ϕ full wave rectifier? (i) How many types of faults th at can occur in HVDC converters? (j) Why smoothing reactor re quired in power converters?

Section BAttempt any three of the following: 10x3 = 30

a
Explain the technical and economical reasons for adopting E HV transmission system for transfer of bulk power over long distance
b
Explain the following terms used in EHVAC transmission syst ems with suitable diagrams (i) sub-transient reactance, (ii) transient r eactance, (iii) synchronous reactance of a source, (iv) the interrupting current capacity of a circuit breaker
c
Explain the design factors of EHV line under steady state limits
d
Why the converters with higher pulse number are used for HV DC transmission system. Explain in detail
e
List any three HVDC project s currently used in India. Also explain the technical specifications of each HVDC project

Section CAttempt any one part of the following: 10x1 = 10

a
Explain the surface voltage gradient on conductors and deri ve the expression for maximum surface voltage gradients for bundled conductor (2 conductors)
b
Illustrate the power handling capacity and line loss of EHV AC lines with various voltage levels
a
Explain the formation of cor ona. What are the factors which affects the formation of corona?
b
Write a short note on
b
Radio interference in EHVAC lines
a
A 12-stage impulse generator has capacitors, and each has r ated with 0.45 µF, 150 kV. The capacitance of the test specimen is 500 pF . Determine the wave front and wave tail resistances to produce a 1.2/50 µ sec. impulse wave. Also determine the maximum output voltage if the charging voltage is 125 kV
b
Draw the equivalent circuit of an Impulse Generator and ind icate the significance of each parameter be ing used. Also, derive an expr ession for voltage efficiency of a single stage impulse generator
a
A six-pulse inverter is oper ating at a constant margin angle of 180. The valve side voltage is 70.7 kV (line to line) and the leakage re actance of the converter transformer is 20 ohms. Compute the extinction an gle, overlap angle and DC voltage when (i) Id= 2400 A and (ii) Id = 4200
b
Describe various t ypes of HVDC links with the help of neat and labeled diagrams. Discuss the applications of each of HVDC link
a
How we can reduce total harm onic distortion (THD) and rippl e factor on the AC and DC sides of converters? Explain in detail?
b
Explain the importance of m ulti-terminal DC transmission? W hat are the different types of MTDC system used?

Question text is extracted from the official AKTU question paper PDF above. Hindi translations are omitted — every question is printed in English in the original paper. Last verified: 2026-08-23.

Repeated Questions — KEE072

Questions that appeared in more than one session, found by comparing 2 years of Hvdc Ac Transmission papers (2022-23, 2024-25)

How pollution affects the performance of EHV AC lines?

Appeared in: 2022-23 · 2024-25

Radio interference in EHVAC lines

Appeared in: 2022-23 · 2024-25

Hvdc Ac Transmission — Other Year Papers

AKTU Hvdc Ac Transmission PYQs from other sessions

Hvdc Ac Transmission2024-25

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