# EE6005 Power Quality | Important Questions | Question bank | Syllabus | Model and Previous Question papers | Download PDF

## EE6005 Power Quality

Subject Informations :

University        :  Anna University
Department     :  B.E. ELECTRICAL AND ELECTRONICS ENGINEERING
Semester          :  07 th sem
Year                  :  04 th year  ( final year )
Regulation       :  R2013
Subject Code   :  EE6005
Subject Name  :  Power Quality

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EE6005 Power Quality | Important  Questions

### EE6005 POWER QUALITY – SYLLABUS – R- 2013

OBJECTIVES:

 To introduce the power quality problem
 To educate on production of voltages sags, over voltages and harmonics and methods
of control.
 To study overvoltage problems
 To study the sources and effect of harmonics in power system
 To impart knowledge on 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

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.

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