00000EE465121903 Pages: 2

Reg No.: Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY

Seventh semester B.Tech examinations (S), September 2020

Course Code: EE465

Course Name: Power Quality

Max. Marks: 100 Duration: 3 Hours
PARTA
Answer all questions, each carries 5 marks. Marks
1 Define power quality. Comment on the growing concern on the quality of (5)

electric power by both electrical utilities and end users.

2 Define triplen harmonics and explain its effects in power system? (5)
3 Explain how non periodic signals are analysed? (5)
4 What is meant by power quality monitoring? List any 6 specifications of a (5)

power quality monitoring equipment.

5 Explain hybrid filters. (5)
6 Distinguish between active and passive filters. (5)
7 Distinguish between common mode rejection ratio and common mode noise. (5)
8 Explain high frequency interference. (5)
PART छ
Answer any two full questions, each carries 10 marks.
9 8) Explain the various short duration voltage variations. (6)
b) With the help of waveform explain the term DC offset. (4)
10 a) List any five objectives for framing power quality standards. (5)
b) Discuss the effects of harmonic distortion on capacitors. (5)
11 8) Briefly discuss the common non-linear loads which cause voltage distortion. (5)
b) Find the harmonic distortion of a voltage with following harmonic (5)
components:

Fundamental=308V, 37 harmonic=30V
5" harmonic=16V, 77 harmonic=9V

97 harmonic=4V

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