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Understanding Common Converter and Drive Harmonics, Cost Analysis and Mitigation Techniques
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Introduction |
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Non linear loads such as photocopiers, personal computers, laser printers, electronic lighting ballasts, uninterruptible power supplies, and variable frequency AC motor drives are increasingly causing harmonics. This course outlines the effects of power system and low/high frequency converter generated harmonics and voltage transients on common electrical equipment. It provides guidance for Converter/drive system design for mitigation of the hazardous effects due to the transients and harmonics. Actual occurrences in industrial environments with some practical solutions are discussed. A hand on tutorial module provides a good insight into the power system and drives harmonics troubleshooting. Some common power system simulation software will be shown to carry out some case studies. It will provide the participants a hands-on understanding of the problem. Finally, some state of the art unity power factor AC & DC drives are suggested to totally avoid the harmonic problems. |
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Course Objectives |
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The course aims to provide the participants with a-clear understanding of the causes and effects of harmonics on a power or distribution system. Simple methods for the identification and recognition of its problems will be offered. Methods for harmonic measurement and analysis for harmonic control and reduction will be discussed. The requirements and limits put forward by various harmonics standards will be highlighted together with the problems associated with its control. A hands-on session on converter/drives harmonics troubleshooting is be conducted.
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Course Outline |
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1. Harmonics
• Understanding Harmonics
• How big is the problem
• Its effects
• Harmonics and drives
2. Hands on approach to:
• Power quality troubleshooting
• Harmonic sequences determination
• True rms meters use
• Power factor measurement
• Power factor correction
3. Effects of Loads
• Linear load
• Non-linear loads
4. Harmonics from Converter/Drives
• Singe phase Converter/Drives
• Dc drives
• Adjustable speed ac drives (ASD)
• Three Phase Converter/Drives
• Dc drives
• ASD
• Harmonic propagation and mitigation in drives
• Concept of total power factor
5. Filters and power system resonance
• ASD and filter capacitors
• ASD, active/passive filtering and resonance
6. Harmonic standard for utilities/Drives
• Voltage and current harmonic
• Power factor
• System efficiency
• Ride through capabilities
7. Unity Power factor ac drives
• Some recent developments
• Case study: ‘A clean power converter’
- Concept
- Development
- Design of the front end converter
- Design of the rear end converter
- Design of controller
- Prototype development
8. Unity Power factor dc drives
• Some recent developments
• Case study: ‘A clean power converter’
- Concept
- Development
- Design of the Diode/ thyristor converter
- Design of controller
- Prototype development
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Trainer(s) |
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Associate Professor Maswood, Ali Iftekhar |
Ali I. Maswood obtained his B & M. Eng. Degree with first class from Moscow Power Engineering Institute, and Ph. D. from Concordia University, Montreal, Canada. Having taught in Canada for a number of years, he joined Nanyang Technological University, Singapore in 1991 where currently he is an Associate Professor. Dr. Maswood’s research interest is in Power Electronics, particularly in Converter generated harmonics, Unity Pf converter, Novel Inverter topology, advanced PWM switching, and Power quality. He has authored numerous referred IEEE/IEE transaction/Journal and Conference publications on these topics. His work in ‘FROSIN’ switch mode power supply gave rise to several Singapore patents. He is a senior member of IEEE, actively involved in the local IAS/PELS chapter and in the steering committee of the IEEE Power Electronics & drives (PEDS) conference. He is also the chapter-author “Power Electronics, Handbook”, published by academic press, San Diego U.S.A, 2002 |
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Who Should Attend |
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Engineers/Technical persons working/associated with Power/power electronics with interest or facing problems on Converters, Ac/Dc motor drives, Harmonics are expected to benefit from this course. The course can in general can also be an eye opener in energy efficiency.
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Course Details |
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Date: |
3 to 4 December 2009 |
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Time: |
9:00am to 5:00pm |
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Venue: |
NTU@one-north campus, Executive Centre |
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Closing Date: |
19 November 2009 |
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Fee: |
Standard: SGD$780
Alumni: SGD$624 Group (3 & Above): SGD$702 |
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Registration fees inclusive of:
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Online Registration |
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>> CLICK HERE to Register Online
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Methods of Payment |
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1.
Credit Card (Visa and Mastercard only)
2. Cheque
made payable
to Nanyang Technological University
3. Invoice to
Company (for Company Sponsored Participants)
4. E-invoice (for
Government Organizations)
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Cancellation & Refund Policy |
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Written notification to
cce@ntu.edu.sg or fax: (+65) 6774 2911 at least 10 days before course commencement |
No cancellation charges
(Full refund) |
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Written notification within 4 – 9 days before course commencement |
50% of course fees
(50% refund) |
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Written notification within 3 days before course commencement |
100% of course fees
(No refund) |
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