Sunday, June 19, 2011

EE2028 POWER QUALITY ANNA UNIVERSITY SEVENTH SEMESTER EEE SYLLABUS E

EE2028 POWER QUALITY

AIM:
To study the various issues affecting power quality, their production, monitoring and
suppression.
OBJECTIVES:
 To study the production of voltages sags, overvoltages and harmonics and methods
 of control.
 To study various methods of power quality monitoring.
UNIT I INTRODUCTION TO POWER QUALITY 9
Terms and definitions: Overloading - under voltage - over voltage. Concepts of
transients - short duration variations such as interruption - long duration variation such
as sustained interruption. Sags and swells - voltage sag - voltage swell - voltage
imbalance - voltage fluctuation - power frequency variations. International standards of
power quality. Computer Business Equipment Manufacturers Associations (CBEMA)
curve.
UNIT II VOLTAGE SAGS AND INTERRUPTIONS 9
Sources of sags and interruptions - estimating voltage sag performance. Thevenin’s
equivalent source - analysis and calculation of various faulted condition. Voltage sag due
to induction motor starting. Estimation of the sag severity - mitigation of voltage sags,
active series compensators. Static transfer switches and fast transfer switches.
UNIT III OVERVOLTAGES 9
Sources of over voltages - Capacitor switching – lightning - ferro resonance. Mitigation of
voltage swells - surge arresters - low pass filters - power conditioners. Lightning
protection – shielding - line arresters - protection of transformers and cables. An
introduction to computer analysis tools for transients, PSCAD and EMTP.
UNIT IV HARMONICS 9
Harmonic sources from commercial and industrial loads, locating harmonic sources.
Power system response characteristics - Harmonics Vs transients. Effect of harmonics -
harmonic distortion - voltage and current distortion - harmonic indices - inter harmonics –
resonance. Harmonic distortion evaluation - devices for controlling harmonic distortion -
passive and active filters. IEEE and IEC standards.
UNIT V POWER QUALITY MONITORING 9
Monitoring considerations - monitoring and diagnostic techniques for various power
quality problems - modeling of power quality (harmonics and voltage sag) problems by
mathematical simulation tools - power line disturbance analyzer – Quality measurement
equipment - harmonic / spectrum analyzer - flicker meters - disturbance analyzer.
Applications of expert systems for power quality monitoring.
TOTAL : 45 PERIODS
TEXT BOOKS
1. Roger. C. Dugan, Mark. F. McGranagham, Surya Santoso, H.Wayne Beaty,
‘Electrical Power Systems Quality’ McGraw Hill,2003.(For Chapters1,2,3, 4 and 5)
REFERENCES
1. G.T. Heydt, 'Electric Power Quality', 2nd Edition. (West Lafayette, IN, Stars in a
Circle Publications, 1994). (For Chapter 1, 2, 3 and 5)
2. M.H.J Bollen, ‘Understanding Power Quality Problems: Voltage Sags and
Interruptions’, (New York: IEEE Press, 1999). (For Chapters 1, 2, 3 and 5)
3. J. Arrillaga, N.R. Watson, S. Chen, 'Power System Quality Assessment', (New
York: Wiley, 1999). (For Chapters 1, 2, 3, 4 and 5)
4. PSCAD User Manual.

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