52215-mt----power Quality

NR

Code No: 52215/MT

M.Tech. – II Semester Regular Examinations, September, 2008 POWER QUALITY (Common to Power System Control & Automation/ Power Electronics/ Electrical Power Engineering) Time: 3hours

Max. Marks:60 Answer any FIVE questions All questions carry equal marks ---

1.

Explain the following terms related to power quality (a) Voltage quality (b) Current quality (c) Quality of supply (d) Electron magnetic compatibility.

2.

What are the causes of power quality deterioration? Discuss the effect of poor quality power on equipment.

3.

Discuss the following related to power quality problem (a) Data collection and analysis (b) Data base structure (c) Data processing.

4.

What are the sources and causes of voltage sags?

5.a) b)

Define magnitude and phase angle jump. Discuss the effect of momentary voltage dip on the operation of induction motor.

6.

Illustrate the effects of voltage sags on the operation of adjustable speed drives.

7.

Explain the effects of harmonics on (a) Capacitor banks (b) Transformers (c) Motors

8.

Discuss the design philosophy of filters to reduce harmonic distortion. &_&_&_&