SPPU Power Quality - December 2016 Exam Question Paper

SPPU Electrical Engineering (Semester 7)
Power Quality
December 2016

Total marks: --
Total time: --

INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

Solve any one question fromQ.1(a,b) and Q.2(a,b)

1(a) Define power quality issues like voltage variations, voltage imbalance and voltage flicker.

5 M

1(b) State and explain the relationship between immunity, emission and compatibility.

5 M

2(a) Explain various grounding practices as per IEEE standards.

5 M

2(b) Explain over voltage mitigation techniques.

5 M

Solve any one question fromQ.3(a,b) and Q.4(a,b)

3(a) Define sag? Explain any two voltage sag mitigation methods.

5 M

3(b) What are the various sources of transient overvoltages?

5 M

4(a) Explain area of vulerability concept related with voltage sag.

5 M

4(b) Define flicker? What are the various sources of voltage flickers?

5 M

Solve any one question fromQ.5(a,b) and Q.6(a,b)

5(a) What are the various sources of harmonics and their effects on the operation of various power system equipments?

9 M

5(b) Explain the following terms and related with waveform distortion
i) Harmonics ii) Interharmonics iii) Subharmonics iv) Triplen harmonics

9 M

6(a) What are different harmonic indices used? Explain their use.

9 M

6(b) Explain power system quantities like active power, reactive power, displacement and true power factor under non-sinusoidal conditions.

9 M

Solve any one question fromQ.7(a,b) and Q.8(a,b)

7(a) Discuss Concept of point common coupling and its significance.

8 M

7(b) Explain various computer tools used for harmonics analysis.

8 M

8(a) Explain passive filter design procedure for harmonic reduction.

8 M

8(b) Expalin in detail principles of controlling harmonics.

8 M

Solve any one question fromQ.9(a,b) and Q.10(a,b)

9(a) What are the requirements of power quality monitor to monitor various power quality parameters? Explain power quality analyzer used for PQ measurements.

10 M

9(b) Write note on choosing PQ monitoring location and its duration.

6 M

10(a) Explain instrument setup and various guidelines to be followed for monitoring power quality.

10 M

10(b) Explain the role of oscilloscopes, data loggerin PQ measurements.

6 M

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