Tutorials Schedule


Tuesday, October 3, 2017

AM (Duration 4h)

T1 - Design, Manufacturing, and Application of Permanent Magnet Machines



Wednesday, October 4, 2017

AM / PM (Duration 8h)

T3 - Capacitors in Power Electronics Applications - Reliability and Circuit Design

AM (Duration 4h)

T4 - Effects of High Penetration of Distributed Generation on Distribution Systems

PM (Duration 4h)

T5 - The Human Body as an Electrical Conductor: History Recent Advances, and Safety Implications

For participating in any of the IAS-AM tutorials, IEEE offers PDH credits for continuing education units, for renewal of professional engineering licensees.
Conference administration reserves the right to cancel any of the tutorials if a minimum registration target is not achieved by September 5th, 2017. In case of cancellation, the registration fee will be refunded.


Tutorials Descriptions


Capacitors in Power Electronics Applications – Reliability and Circuit Design


Huai Wang, Aalborg University, Denmark

Capacitors are key components in power electronic systems in terms of cost, volume, and reliability. This tutorial focuses on the sizing, modeling, and reliability of capacitors from an application perspective, concentrating on both classical and emerging power electronics applications.  The tutorial will start with a brief introduction to different types of capacitors (e.g., electrolytic capacitors, film capacitors, ceramic capacitors, etc.) used in power electronics applications, and their respective technology limits and emerging developments. The morning sessions focus on the reliability of capacitors and their multi-physics modeling in power electronic converters. The failure mechanisms and critical stressors of each type of capacitor will be presented. Non-standard application-oriented accelerated degradation testing of film capacitors will also be discussed. A mission profile based reliability analysis approach will be introduced by considering long-term realistic stress profiles of capacitors in different applications. The afternoon sessions focus on the circuit design aspects, including the sizing criteria, innovative active capacitor solutions, and built-in condition monitoring capability for capacitors. Specifically, the selection of capacitors to fulfill the specifications of steady-state performance, transient and stability performance of power electronic converters under both normal and abnormal operations will be discussed. A two-terminal active capacitor concept will be presented, which enables reduced design cost or increased power density in a couple of power electronic applications by directly replacing passive capacitors. Condition monitoring of DC-link capacitors will be reviewed in terms of methodologies and principles. Throughout the tutorial, a few systematic, hands-on examples will be discussed, such as capacitors for DC-DC converters, Modular Multi-level Converters (MMC), and photovoltaic inverters. The material is based on the latest research outcomes from the Center of Reliable Power Electronics (CORPE) at Aalborg University.

Effects of High Penetration of Distributed Generation on Distribution Systems


David Farmer and Brian Dell, UC Synergetic

The risks of adding significant levels of distributed generation are systemic and potentially threaten the power quality and operation of modern distribution systems. To address these risks, one must think critically about what preemptive measures should be taken in terms of both engineering decisions as well as technical policies. Failure to do so will result in a system with legacy policies that were sensible at the time of their creation, but result in a system that cannot be effectively maintained and operated going forward.  This tutorial provides power engineering personnel with the background knowledge necessary to more effectively identify and address both transient and steady-state phenomena on modern distribution systems. These include voltage and current fluctuations, harmonics, and larger scale issues that are a result of increasing levels of penetration of distributed energy resources. We will discuss methodology, guidelines, and criteria used to evaluate the risks presented by the interconnection of significant amounts of distributed generation. Topics ranging from policy decisions and system impact study procedures, to commissioning and technical inspections will provide the audience with areas of concern to take into consideration when anticipating the effects of future distributed energy resources on their systems. To highlight the consequences of engineering decisions and technical policies, an examination of general facts, as well as specific case studies will be presented. We will discuss solutions that are currently employed, in addition to potential solutions that could be used to mitigate problems associated with distributed energy resources. The purpose of this discussion will be to find a balance among maintenance costs, power quality, and rising levels of aggregate generation on the distribution system at both the substation feeder and the customer facility level.

The Human Body as an Electrical Conductor – History, Recent Advances, and Safety Implications


Fabio Freschi, Politecnico di Torino (Polytechnic University of Turin), Italy

The interaction between physiological and exogenous electric currents in the human body is the foundation of the electrical safety of persons. Our knowledge of the effects of exogenous currents on persons has relied upon old statistical studies performed on volunteers, animals or cadavers. Other data may be obtained from statistics of electrical accidents; however, circumstances of electrical accidents may not be completely known. At the same time, experiments on animals (e.g. dogs, sheep, and pigs) introduce the issue of the extrapolation of results from animals to humans, complicated by the significant anatomical differences between the cardiovascular system and the internal spatial distribution of organs among species. An alternative and more effective approach is to employ computerized anatomical models of human beings, identified as computational human phantoms, and numerically evaluate the current through the human body when it is subjected to an external excitation.  The purpose of this tutorial is to highlight the recent advances in this area, with particular attention to the effects of direct currents passing through the human body and induced currents by low-frequency electric and magnetic fields. Typical case studies will be presented to provide a practical understanding of the problems and their possible solution in real-world applications.

Design, Manufacturing, and Application of Permanent Magnet Machines


Dan M. Ionel, SPARK Laboratory, University of Kentucky, Lexington, KY, USA,

Bulent Sarlioglu, WEMPEC Consortium, University of Wisconsin, Madison, WI, USA

The Energy Systems Committee is soliciting papers related to energy sources, energy management, system control and related issues in industrial, commercial or institutional facilities. Drafts of proposed papers should be sent to Dr Wei-Jen Lee: wlee@uta.edu
The tutorial covers, in a combined approach, main aspects of permanent magnet (PM) machine design for dedicated applications, while considering practical aspects of manufacturing technologies, competitive cost and high performance objectives. A discussion of the main benefits of PM machines of the brushless DC and AC types is supported by examples from diverse well established applications, such as heating, ventilation and refrigeration equipment, and industrial servomotors, as well as from recent developments, including wind turbines, electric and hybrid vehicles, and aerospace equipment. The preliminary selection of materials and machine topologies is presented together with basic sizing equations, which represent the initial steps of an iterative comprehensive design process that involves multi-physics FEA and systematic optimization, involving thousands of candidate designs and the use of artificial intelligence techniques, such as differential evolution algorithms. The importance of the traditional electromagnetic design focus, together with the thermal and mechanical stress studies, is illustrated especially for designs with high specific load and/or very competitive cost. The tutorial includes a section devoted to the robust design study of manufacturing tolerances on the PM machine performance using Design of Experiments (DOE) and Six Sigma methods. It is shown that such computational and experimental methods, in combination with the tests recommended by the recently approved IEEE 1812 Guide for Brushless PM Machines, may be used to examine out-of-specification issues and possible causes for performance variation in machine prototypes and products.

Self-Test Assessment of Electrical Power Engineering Educational Priorities


Thomas Baker, Sumatron, Inc.

This tutorial presents 31 basic theory questions that do not appear to be a priority for universityelectrical engineering education. The questions are divided into four areas: single-phase acbasics, three-phase basics, three-phase study basics, and safety considerations. The intent ofthe tutorial is, not only to survey the attendees on how they would prioritize the importance ofeach topic from an educational perspective, but also to present the answers. Based on theorganizer’s experience in presenting 44 four-day seminars, the majority of new and even moreexperienced electrical power engineers would have difficulty answering any of the questions.This quasi ranking may not only be helpful towards eventually improving the electrical powerengineering educational process, but could also translate into greater productivity for society atlarge. New power engineering graduates would have greater chances for employment,innovation, more favorable advancement, more entrepreneurial opportunities, and an improvedawareness of electrical personnel safety concerns. The tutorial certainly promises to provide atechnically interesting and entertaining discussion.