Hall Ticket No Question Paper Code: BPE210
INSTITUTE OF AERONAUTICAL ENGINEERING
(Autonomous)
M.Tech II Semester End Examinations (Supplementary) January, 2018
Regulation: IARE-R16
POWER QUALITY
(Power Electronics and Electrical Drives)
Time: 3 Hours Max Marks: 70
Answer ONE Question from each Unit
All Questions Carry Equal Marks
All parts of the question must be answered in one place only
UNIT I
1. Explain the impacts of power quality problems on end users?
List out the power acceptability curves? Explain the CBEMA curve with neat figure?
2. Define the following power quality problems:
i. Short duration voltage variation
ii. Total Harmonic Distortion and write the expression of Voltage THD
Describe the major power quality problems concerned by the customers and utility?
UNIT II
3. Explain the following commercial non-linear loads
i. Single-Phase power supplies
ii. Fluorescent lighting
Explain current fed type of non-linear loads?
4. Define and classify the non-linear loads?
Explain the solid-state devices type non-linear loads?
UNIT III
5. Differentiate between true and displacement power factor?
Explain any three types of power quality measuring instruments?

6. Describe the discrete Fourier transform technique?
Explain the wavelet transform technique for error analysis in power quality?
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UNIT IV
7. Explain the instantaneous active and reactive powers in a three phase power systems?
Derive the relation between Total Harmonic Distortion and Distortion Index?
8. Define the following indices for the voltage sag analysis:
i. Detroit Edison Sag Score
ii. Voltage Sag Energy
Explain the conventional approaches to reduce harmonic reduction and IEEE 519: voltage distortion
limits?
UNIT V
9. What is meant by Custom Power Device? Explain about Utility Customer Interface?
Explain the operation of a Unified Power Quality Conditioner with neat schematic diagram?

10. With a neat schematic diagram, Explain how a load will be compensated in a distribution system
using ideal shunt compensator (DSTATCOM)?
Explain the concept of custom power park with block diagram?