T15 Power Electronics and Power Quality: a Strong Connection

Prof. Medhat M. Morcos, Kansas State University, USA

Juan C. Gómez, Universidad Nacional De Rio Cuarto, Argentina

Full day (9 a.m. to 4 p.m.)
Location: Seggau
including sightseeing: Seggau and wine yard

Overview

This course is designed as a two-part tutorial (one day). The first part discusses the operation of power electronics circuits with emphasis on recent developments in power semiconductor devices and power conversion equipment. The second part introduces the topic of electric power quality (PQ) and covers the loads which cause PQ problems. Artificial intelligence techniques for PQ analysis and diagnosis are discussed. The strong connection between power electronics and power quality is introduced through several applications.

The course will be taught in a lecture format and will include demonstrations to illustrate a number of important concepts and techniques. Circuit topologies, advanced control methods and design considerations are presented. Participants will receive an excellent summary of the status of technology in industrial applications of power electronics. Lecture notes will be given to all participants.

Course Outline for Advanced

Lecture 1 Power Electronics (by M.M. Morcos – 3 Hours) MORNING

  1. Power Semiconductor Devices (30 minutes)
    1. Thyristors
    2. Power MOSFETs
    3. IGBTs
    4. GTOs
  2. High-Frequency Switching DC/DC Converters (30 minutes)
    1. Direct converter
    2. Indirect switching converter
    3. Device stresses
    4. Isolated high-frequency DC/DC converters
    5. Converters with multiple outputs
  3. Isolated High-Frequency DC/DC Converters (30 minutes)
    1. Single-ended isolated forward converter
    2. Double-ended isolated forward converter
    3. Flyback converter
    4. Multiple-output converter
  4. Resonant Converters (30 minutes)
    1. Principle of operation
    2. Single- and three-phase inverters
    3. Pulse-width-modulation techniques
  5. Soft Switching Converters (30 minutes)

Lecture 2 Power Quality (by J.C. Gómez – 3 Hours) AFTERNOON

  1. Introduction to Power Quality (25 minutes)
    1. Harmonics, sub-harmonics and inter-harmonics
    2. Voltage fluctuations
    3. Flicker
    4. Transient and impulsive overvoltages
    5. Voltage unbalance
    6. Power quality surveys and general trends
    7. Standards and limits
    8. Power quality indices
  2. Loads Which Cause Power Quality Problems (25 minutes)
    1. Power electronics circuits
    2. Rotating converters
    3. Static converters
    4. Fluorescent and high pressure vapor lighting
    5. Pulse modulated devices
    6. Adjustable speed drives
    7. DC arc furnaces
    8. Battery charges
  3. Effect of Power Quality Problems on Sensitive Equipment (25 minutes)
    1. Voltage sags
    2. Short interruptions
    3. Phase angle shift
    4. Harmonics
  4. Power Quality Improvement and Mitigation Measures (25 minutes)
    1. Supply company’s solutions
    2. User solutions
    3. Sensitive equipment manufacturer’s solution
  5. Artificial Intelligence Tools for Power Quality Analysis and Diagnosis (25 minutes)
  6. The Strong Connection (25 minutes)
    1. Power electronics power quality interaction
    2. PE and PQ trends
    3. PE-PQ joint future

Course Instructors

  • M.M. Morcos is professor of electrical and computer engineering and Distinguished Teaching Scholar at Kansas State University. He received the Ph.D. in electrical engineering from the University of Waterloo in Canada. Dr. Morcos’ areas of expertise include power electronics, artificial intelligence applications in power quality and power systems protection, switching transients in power transmission systems, and high voltage engineering. He has worked as avionics engineer for 15 years and has a total of 20 years of teaching and research experience in these areas.
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  • Juan C. Gómez received the BS degree from National University of Cuyo in 1974 and the Ph.D. degree in electrical engineering from Sheffield Hallam University, England in 1994. After working for four years in the National University of Cuyo he joined the National University of Río Cuarto, Argentina, where he is Director of the Electric Power System Protection Institute. He is also professor in the Department of Electrical Engineering. His main interest areas are power quality and power system protection. He is a member of IEEE and PES.
     

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