PQM (2180911)

-PQM-
POWER QUALITY AND MANAGEMENTS (2180911)

1.What is Power Quality?Discuss the examples of poor power quality issues in 

brief.

2.Define:

1.Linear Loads

2.InrushCurrent

3.VoltageSag

4.VoltageSwell

1.Linear Loads

2.InrushCurrent

3.VoltageSag

4.VoltageSwell

3.Explain causes of voltage and current harmonics.

4.Explain following terms related to EMI.(1)Common Mode Noise (2)Common Mode Rejection Ratio (3)Conducted Emission.

5.Discuss the effect of harmonics on AC Motors

6.List and explain types of harmonics based on the sequence of rotation. Also discuss the effect of each.

7.What is Electromagnetic Interference(EMI)? Describe main sources of EMI.

8.Differentiate grounding and bonding.

9.Discuss the Capacitor switching transient.

10.Discuss the sources of voltage sag.

11.Name and explain different types of power Quality issues that affect the power system depending upon the severity?

12.What is an ITC graph?Draw and discuss the ITIC graph in detail.

13.Define, displacement power factor and true power factor. List the methods of power factor improvement techniques and explain the static VAR compensator.

14.Explain number of test locations & test durations for power quality.

15.Describe phenomena of islanding.

16.List and explain advantages and disadvantages of distributed generation.

17.Define flicker. List reasons responsible for flicker.

18.Explain effect of harmonics on (1)transformers and (2)capacitor banks.

19.Explain the responsibilities of the suppliers and users of electrical power.

20.Explain application of synchronous condensers for power factor improvement.

21.Write a note on harmonic analyzer.

22.Discuss significance of power factor correction with power quality point of view.

Ur

23.Write shortnote on importance and application of True RMS meter.

24.Define the following terms.(1)Inrush current (2)Bonding (3)Form factor.

(1) Inrush current (2) Bonding

(3)Form factor.

25.Explain the main steps to monitor the power quality problem satsite.

26.Explain the principle of DVR operation used for sagmitigation.

27.Explain“Individual Harmonic Distortion”and “Total Harmonic Distortion”for harmonic analysis.

28.Find out value of capacitor in kVAR to improve the power factor of a 120kW Induction motor from0.75 to 0.96.

29.Explain application of Ferroresonance transformer.

30.Explain in detail about surgearrester and surge suppressor for over voltage protection.

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