.22006 10000465 ہو
‎APJ ABDUL KALAM ॥ ° aL UNIVERSITY‏
‎Seventh Semester B.Tech Degree Regular and Supplementary Examination December 2021 (2015 Scheme)‏

Course Code: EE465

Course Name: Power Quality

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

among the electrical utilities and consumers.
2 Calculate the THD of a current waveform with following frequency makeup (5)

1,=500A,1;=200 A,Is=120 ۸1۸

How do Fourier series helps in analysis of harmonics? (5)
4 Enumerate the features of harmonic and spectrum analysers used for 2൮ (5)
monitoring
5 Write a note on hybrid filters (5)
6 Discuss on current harmonic cancellation using transformers. (5)
7 Mention any two power quality issues of grid connected renewable energy (5)
sources.
8 Illustrate on power frequency fields (5)
PART ‏تا‎
‎Answer any two full questions, each carries 10 marks.
9 a) Mention various kinds of voltage variations with neat figures. (6)
b) Define flicker. List various sources of flicker (4)
10 a) Define notching. Mention the causes of notching? (5)
b) Differentiate between linear and non linear loads with suitable example (5)
11 a) Mention any two major sources of harmonics in power system (5)

b) Comment on the significance of power quality standards. List any two IEEE (5)

power quality standards

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