To Download 8th Sem -> EE2028 POWER QUALITY SYLLABUS CLICK HERE
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
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
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
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
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
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.
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.
0 comments:
Post a Comment