IAS Annual Meeting

Below is a short description of the tutorials offered at this year's conference.

In addition to the conference tutorials described below, the Power and Energy Society is offering (under separate registration) their Plain Talk series of tutorials. For information and registration details on the Plain Talk series go to https://www.ieee-pes.org/plain-talk-at-2011-ias-annual-meeting

Maintenance Considerations and Planning for Electric Power Equipment (eight hours)

Sunday, October 9 - 8:00am to 5:00pm

Organizer: Dan Bumblauskas, University of Missouri, PFC Services Inc. and ABB Inc.

Abstract: An introduction on various types of transformers and circuit breakers will be provided along with a discussion on the evolution of maintenance practices. This includes time based maintenance, condition-based maintenance, reliability-based maintenance and predictive maintenance. Computerized maintenance information systems have been applied to track maintenance information and history. An overview of the various systems will be provided. Such information systems have not traditionally been used to predict or simulate maintenance decisions and actions. This tutorial will detail two predictive maintenance models, a population data analysis, and a information system architecture which can be utilized to aid operations and maintenance managers with the difficult resource allocation decisions they face in the field. The first model is formulated to address the consideration of component dependency for series network connections using a Markov Decision Process (MDP) model and solution algorithm. The second model is formulated to address the prioritization of maintenance activities for a fleet of equipment using an Analytical Hierarchy Process (AHP) and solution algorithm. A population data set is reviewed and a recurrent data analysis is conducted. The final element is the information system architecture linking these two models to a marketing information system (MkIS) in order to provide quotations for maintenance services. The specific industry of interest is the electrical power equipment industry with a focus on circuit breaker maintenance decision actions and priorities and the development of quotations for such services. This tutorial is of particular interest to operations and maintenance managers working in electric utility industry and those working in the renewable, sustainable, and green energy industries.

Power System Harmonics (four hours)

Tuesday, October 11 - 2:00pm to 6:00pm

Organizer: Dr. Babak Badrzadeh, Vestas Wind Systems A/S

Abstract: This tutorial discusses various aspects of power system harmonics including theory, modeling, studies, compliance, and filtering. It first presents primary sources of harmonic generation and their typical harmonic signature. The inter-harmonics generated by the current source and voltage source converters are then discussed. Various international standards for the assessment of harmonics are overviewed and their differences are highlighted. Modeling methodology for different system components including power electronics converters, cables, overhead lines, transformers, and external grid is presented, and the commonly used tools for power system harmonic analysis including time domain and frequency domain approaches are elaborated on. Harmonic susceptibility issues including harmonic resonance, harmonic instability and control interaction are then presented. Common practices for mitigation of system harmonics including multi-pulse conversion, multi-level conversion, modified modulation strategy for voltage source converters, and the use of passive and active filters are highlighted. Lastly, a step-by-step procedure for designing passive harmonic filters is elaborated on. The tutorial includes several practical examples taken from studies conducted on industrial power systems and wind power plants.

Maintenance as a Safety Issue (four hours)

Wednesday, October 12 - 8:00am to 12:00pm

Organizer: James R. White, Shermco Industries

Abstract: Facility and maintenance supervisors and managers often think of electrical power system maintenance as an overhead expenditure. While there are costs involved, maintenance should be viewed as a safety-related issue. The 2009 edition of NFPA 70E states that a safe electrical system is one that is properly engineered, properly installed and properly maintained. It is maintenance that is often neglected or deferred, especially when budgets tighten. This four-hour program discusses why maintenance is a safety issue, provides examples of the consequences of improper maintenance, reviews NFPA 70E requirements contained in Articles 130 and 205, reviews NFPA 70B and ANSI/NETA MTS-07 standards. This practical program will provide guidance on what is required, when it is required and considerations for outsourcing maintenance or performing it with in-house staff.

Design and Operation of Motor Bus Transfer Schemes at Medium Voltage Industrial Facilities (four hours)

Wednesday, October 12 - 2:00pm to 6:00pm

Organizer: Chuck Mozina

Abstract: This tutorial discusses the design and operation of automatic schemes to transfer loads from an interrupted bus section to the alternate bus within industrial facilities without damaging the motors being transferred. It is extremely important to maintain continuity of electric service to these facilities when the normal source has sustained an outage. Many industrial facilities have at least two independent supply sources. Each source supplies a bus section (typically at 4.16 or 13.8 KV) with a normally open bus tie between the bus sections. Upon loss of supply, the bus section must be quickly transferred to the alternate supply to avoid a major outage. The transfer must be done without damaging the motors supplied from the bus section that has sustained the outage. The tutorial discusses various schemes to provide this transfer, operating experience with each scheme, plus new designs made possible through the use of digital technology.

Fundamentals of Power Distribution Systems Design: Review, Simplified and Shortcut Calculations and Guidelines (eight hours)

Thursday, October 13 - 8:00am to 6:00pm

Organizer: Dr. P.K. Sen, Colorado School of Mines & NEI Electric Power Engineering

Abstract: This one-day short course has been designed for practicing engineers (young or experienced), managers and technical personnel interested in different aspects of Power Distribution Systems Engineering and Design as applied to Industrial & Commercial Power Systems Design, Rural Electric Power, Petroleum and Chemical Industry, Cement Industry, and Investor Owned Utility. The main objective of the course is to introduce the basic tools required for all power systems calculations and used in a number of design problems. The primary focus of this course is on the medium voltage (MV) power systems (115kV-4.16kV) and 480 V (LV). It is assumed that participants will have some basic and broad knowledge of fundamentals of electric power systems. Practical experience is preferable and would be very useful, but not required. Emphasis is given on hand calculations & estimations rather than computer programs. Numerous real world design problems will be solved. The short course will be divided in two, four-hour Stand-alone module. The first half will discuss the big picture and is designed for all engineering, managerial and operation and maintenance personnel. The second half will build on the concepts from the first half and will include more design problems and calculations. Extensive handouts will be provided at the workshop. This introductory class is absolutely essential for all practicing power systems engineers and also designed to facilitate to take the “Professional Engineers” examination.

EMT Simulation of Rotating Machine Drives (four hours)

Thursday, October 13 - 8:00am to 12:00pm

Organizer: Tara Stokotelny, Manitoba HVDC Research Centre

Abstract: This tutorial will present an electromagnetic transient (EMT)-type simulation-based approach to designing drives and their controls. Many industrial applications require precise control of their respective mechanical drive systems. For this, rotating machines with power electronic based converters are becoming increasingly more prevalent. In the design stage of a power-electronic-based machine drive simulation can help to size components, evaluate the performance and tuning of control strategies and apply necessary optimizations. Simulation can also uncover problematic areas such as susceptibility to electrical or mechanical disturbances, overall power quality effects (e.g. harmonic injection), etc. Induction and dc machines have been the key types of electric drive systems. In recent years, permanent-magnet machines are also becoming more commonplace. Theory will be discussed and using an EMT simulation tool, illustrative examples will be presented to demonstrate some methods to address aspects such as the following: schemes for speed and/or torque control; regenerative braking; controller tuning and optimization; impacts of drives on cables; full harmonic spectrum analysis to investigate effects on the supply network and machine sizing; etc.

Reliability of IGBT Modules in Industrial Applications (four hours)

Thursday, October 13 - 2:00pm to 6:00pm

Organizer: John F. Donlon, Powerex, Inc.

Abstract: This tutorial addresses the reliability of the IGBT power module which is the heart of modern industrial drives. It has proven to be a highly reliable and rugged component. However, it must be applied within its ratings and capabilities. This tutorial will discuss the proper selection of the IGBT, its limitations and failure modes, the precautions that must be taken to ensure long life and the design and application considerations that affect reliability. Attendees will gain an understanding of the need to protect the IGBT from internal and external disturbances and practical solutions to over current, over voltage, and over temperature conditions. The workshop is intended to be of interest to those who use, apply, procure, or specify power electronic products based on the IGBT as the power switch.