Download PTU M.Tech. EE 2nd Semester 76091 POWER QUALITY Question Paper

Download PTU. I.K. Gujral Punjab Technical University (IKGPTU) M.Tech. EE 2nd Semester 76091 POWER QUALITY Question Paper.

1 | M-76091 (S35)-2748

Roll No. Total No. of Pages : 02
Total No. of Questions : 08
M.Tech. (Electrical Power System) (2018 Batch) (Sem.?2)
POWER QUALITY
Subject Code : EEPS-204C-18
M.Code : 76091
Time : 3 Hrs. Max. Marks : 60

INSTRUCTIONS TO CANDIDATES :
1.Attempt any FIVE questions out of EIGHT questions.
2.Each question carries TWELVE marks.

1. a) What are the major power quality issues? Explain the reasons for increased concern
in power quality. 6
b) Explain the various IEEE and IEC standards used for harmonic mitigation. 6
2. a) How the load current harmonics are responsible for source voltage destruction? Also
explain the various harmonic indices. 6
b) What are the important objectives of power quality monitoring? Describe different
methods of power quality monitoring. 6
3. a) Explain in detail about principle of operation of a shunt active power filter with neat
schematic diagram. 8
b) What is fundamental frequency characterization? Explain window functions. 4
4. a) How does voltage sag affect different equipments in industries, protective
switchgears and consumer electronics? Explain using various waveforms. 8
b) What are the various waveform distortion categories? 4
5. a) Write a short note on the following : 8
i) Event recording
ii) Flicker monitoring
iii) Assessment of voltage unbalance
b) What are the instruments used for analysing non sinusoidal voltage and currents? 4
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1 | M-76091 (S35)-2748

Roll No. Total No. of Pages : 02
Total No. of Questions : 08
M.Tech. (Electrical Power System) (2018 Batch) (Sem.?2)
POWER QUALITY
Subject Code : EEPS-204C-18
M.Code : 76091
Time : 3 Hrs. Max. Marks : 60

INSTRUCTIONS TO CANDIDATES :
1.Attempt any FIVE questions out of EIGHT questions.
2.Each question carries TWELVE marks.

1. a) What are the major power quality issues? Explain the reasons for increased concern
in power quality. 6
b) Explain the various IEEE and IEC standards used for harmonic mitigation. 6
2. a) How the load current harmonics are responsible for source voltage destruction? Also
explain the various harmonic indices. 6
b) What are the important objectives of power quality monitoring? Describe different
methods of power quality monitoring. 6
3. a) Explain in detail about principle of operation of a shunt active power filter with neat
schematic diagram. 8
b) What is fundamental frequency characterization? Explain window functions. 4
4. a) How does voltage sag affect different equipments in industries, protective
switchgears and consumer electronics? Explain using various waveforms. 8
b) What are the various waveform distortion categories? 4
5. a) Write a short note on the following : 8
i) Event recording
ii) Flicker monitoring
iii) Assessment of voltage unbalance
b) What are the instruments used for analysing non sinusoidal voltage and currents? 4

2 | M-76091 (S35)-2748

6. a) Using a block diagram, describe the principle of operation of a dynamic voltage
restorer. 8
b) Explain the essentials of a grounded system. 4
7. What are Custom power devices? Explain the operation of any two custom power
devices in detail. 12
8. a) Discuss the operation of a CVT. Why and where it is preferred? 6
b) Explain the operation of any one device which is mainly responsible of flicker
problem in power system. 6













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