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Online Course

Power Quality Improvement Technique

Indian Institute of Technology Roorkee and NPTEL via Swayam

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Overview

The power quality of modern power distribution system is vulgarized due to the increased use of distributed sources,adjustable speed drive, nonlinear load and unbalanced load. The main challenge in the distribution system is the mitigation of power quality problems produced by load disturbances and supply disturbances [1], [2]. It can be mitigated by passive filters as well as active filters. The passive filters are economically cheap but their performance is poor compared to the active power filters [2]. Hence active power filters are preferred in the modern power system
INTENDED AUDIENCE : Final year B.Tech, M.Tech of Power Electronics and power system,Power electronics Engineer / Expert from industry
PREREQUISITES : Power Electronics
INDUSTRY SUPPORT : ABB, GE, Statcon Energeia, CESC, NTPC, NHPC all state electric supply board, AAI

Syllabus

COURSE LAYOUT Week 1 : Concept of Power Quality: Frequency variations, voltage variations- sag and swell, waveform distortion –dc offset,harmonics, inter-harmonics, notching and noise.
Week 2 : Representation of harmonics, waveform, harmonic power,measures of harmonic distortion; Current and voltage limits of harmonic distortions: IEEE, IEC, EN, NORSO
Week 3 : Causes of Harmonics: 2-pulse, 6-pulse and 12-pulse converter configurations, input current waveforms and their harmonic spectrum; Input supply harmonics of AC regulator, integral cycle control, cycloconverter, transformer, rotating machines, ARC furnace, TV and battery charger.
Week 4 : Elimination/ Suppression of Harmonics: High power factor converter, multi-pulse converters using transformer connections
(delta, polygon)
Passive Filters: Types of passive filters, single tuned and high pass filters, filter design criteria, double tuned filters, damped filters
and their design
Week 5 : PWM Inverter: Voltage sourced active filter, current sourced active filter, constant frequency control, constant tolerance band control,variable tolerance band control.
Week 6 : Active Power Filters: Compensation principle, classification of active filters by objective, system configuration, power circuit andcontrol strategy
Week 7 : Hybrid Shunt Active power filter: Principle of operation, analysis and modelling
Week 8 : Unified power quality conditioner, voltage source and current source configurations, principle of operation for sag, swell and flicker control

Taught by

Prof. Avik Bhattacharya

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