Download GTU BE/B.Tech 2019 Summer 8th Sem New 2180911 Power Quality And Management Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VII(NEW) EXAMINATION - SUMMER 2019

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Subject Code:2180911 Date:09/05/2019
Subject Name:Power Quality And Management
Time:10:30 AM TO 01:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q.1 (a) What is Power Quality? Discuss the examples of poor power quality issues in brief. 03
(b) Define the following terms: 1. Displacement Power Factor 2. Nonlinear load 3. Flicker 04
(c) Discuss significance of power factor correction with power quality point of view. 07

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Q.2 (a) Explain Responsibilities of the Suppliers and Users of Electrical Power. 03
(b) Define: 1.Linear Loads 2.Inrush Current 3.Voltage Sag 4.Voltage Swell 04
(c) Explain causes of voltage and current harmonics. 07

Q.3 (a) OR
List cures for low frequency disturbances. Explain any two. 07

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(b) Explain application of synchronous condensers. 03
(c) Discuss the effect of harmonics on AC Motors 04

Q.3 (a) Explain power factor improvement using static VAR compensators. 07
(b) OR
Explain following terms related to EMI. (1) Common Mode Noise (2) Common Mode Rejection Ratio (3) Conducted Emission. 04

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(c) What is a transient? Discuss the causes of transients in power system. 07

Q4 (a) Discuss the effects of harmonics on AC motor performance. 03
(b) Define the term harmonics? List the sources of harmonics in power system. 04
(c) Explain different schemes of grounding and bonding in power system in detail. 07

Q4 (a) List and explain types of harmonics based on the sequence of rotation. Also discuss the effect of each 03

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(b) OR
What is Electromagnetic Interference (EMI)? Describe main sources of EMI. 04
(c) Explain power quality-issues with a system containing DG. 07

Q.5 (a) What is the importance of the value of earth’s resistance? Describe the fall of potential methods for measurement of earth’s resistance. 03
(b) Differentiate grounding and bonding. 04

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(c) Describe effect of EMI on power quality. 07

Q.5 (a) What is distributed generation? Elaborate its effect on the power quality issues. 03
(b) OR
What are susceptibility criteria for power quality? 04
(c) Discuss the Capacitor switching transient. 07

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(a) Explain number of test locations & test duration for power quality measurement. 07

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