Tuesday, November 13th, 2007 @ 09:20 – 10:40, Dana 2 Hall
Industrial Technology II: Power Electronics & Best Practices
This session will address the latest technological challenges that face the power industry and the best practices in hazardous areas in
compliance to international standards. In this session, the emphasis will be on practical industrial applications that addresses Power electronics
control, applications and power switch boards. Best practices in hazardous areas are also very important to our local industry.
Speaker
Peter Magyar, Consultant and executive board
member of the IEEE Industry Applications Society,
Advanced Development Dept., Hella KGaA Hueck
& Co., Germany.
Peter Magyar (M´91, SM´04, F´07) received the dipl. eng.
and the dr.tech. degrees from the Budapest University of
Technology, Hungary, in 1967 and 1975, respectively.
From 1967 to 1991, he was a lecturer and a research
associate with the Department of Automation, Budapest
University of Technology. From 1982, he led the Laboratory of
Microprocessor Controlled Drives of the same department. From 1991 to 2003,
he was head of development drives with Hanning-Works at D-Tech Ltd.,
Germany. Currently, he is with the Advanced Development Dept. at Hella
KGaA Hueck & Co., Germany. His working field is designing car parking
assistance systems and car steering control.
Dr. Magyar is executive board member of the IEEE Industry Applications
Society and recipient of the IAS Distinguished Service Award, 2006.
Terence Hazel, Consultant and a member in IEC TC99, Schneider
Electric France
Presentation Title
Advanced Control of Soft Starters for Industrial Drives
Three-phase semiconductor contactors and soft starters are cost-effective
alternatives to frequency inverters in powering asynchronous motor drives
with pump-, ventilator-, valve-, or conveyor-load. Advanced design of the
power electronics topology and of the control algorithms extends the field of
applications, increases the drive quality and reduces the reaction on power
supply as well as the amount of investment. An economic solution results
from using two controlled phases with back-to-back thyristor pairs which is
characterised by an asymmetrical currect flow. A symmetrical current flow
can be attained by applying an asymmetrical firing angle in the controlled
phases which also eliminates the oscillation torque of asynchronous motors
during voltage ramp controlled starting or breaking. To eliminate the high
oscillation torque in contactor mode of operation a switching strategy will be
presented based on the space-vector theory of the asynchronous motor and the
power electronics part.
“Dedicated Adjustable Speed Drive Switchboard”
The use of adjustable speed drives (ASD) has many advantages in terms of
energy efficiency, control precision and flexibility. On the other hand their
Terence Hazel received his BScEE degree from the
University of Winnipeg, Manitoba, Canada in 1970. He
worked for one year as a Power Coordination Engineer in
Perth, Australia, and for several years in Frankfurt,
Germany as a Consulting Engineer for the construction
and renovation of industrial power distribution systems.
Since 1980 he has been with the projects group of
Schneider Electric (formerly Merlin Gerin) Grenoble,
France where he has provided team leadership for several
major international projects involving process control, power distribution and
power management systems. He is a senior member of IEEE, a member of IEC
TC99, and has presented several papers and tutorials at IEEE IAS conferences.
His main interests are power quality and the reliability of electrical distribution
systems.
use may cause problems in the power system due to the harmonic currents
generated by power electronic devices. These harmonic currents will cause
harmonic voltages which can have detrimental effects even on the ASDs
themselves.
For a large site several 690V ASDs were used in a particular production unit.
It was decided to power all ASDs from one MCC rather than to install several
ASDs in each MCC of the production unit. This allowed filtering the
harmonic currents at one location in the plant only, rather than having
harmonic currents generated at several locations and filtering at only one
location. To reduce the amount of cabling work at site, all ASDs were
installed within the MCC cubicles so that the motors were connected directly
to the fully-withdrawable MCC. Using fully-withdrawable MCCs allows
maintenance to be carried out without any shutdowns. The installation of the
ASDs within the MCCs will be described.
Filtering of the harmonic currents was done by means of active filters. These
filters not only prevented harmonic currents from circulating in the power
system but also ensured very clean voltage waveforms at the MCC busbars
thus providing excellent operating conditions for the ASDs themselves.
Active filters were selected rather than passive filters in order to avoid overcompensation when the plant production was low. The design of the active
filters including provision for maintenance without any process shutdowns
will be described.
Marty Cole, Killark Specifications Engineer
and
IEC Product Manager, Hubbell Canada LP,
Canada
Marty Cole has worked for Hubbell Canada LP for
close to 30 years and has been involved with hazardous locations for much of
that time. He is a member of the Canadian Electrical Code (CEC) Part I Section 18 Subcommittee and CSA’s Integrated Committee on Hazardous
Location Products. He was vice-chair of the task force that added the IEC
“Combining Hazardous Location Practices and Technologies in a
Large Capital Project”
The paper describes how North American and European installation methods
and equipment were blended on a large capital project to achieve enhanced
safety while at the same time achieving significant capital and installation
cost reductions. The IEC Zone area classification system was used. The
existing Canadian Electrical Code (CEC®) permitted the use of equipment
certified to either Zone or Division hazardous location standards. Working
with the local regulatory authority, traditional mindsets were challenged to
enable the use of practices proven in various installation codes, with the
fundamental principle of achieving equal or better safety compared to the
Zone System to Section 18 and chaired the committee that adopted the IEC
60079 Series standards as CSA standards.
Marty is chairman of the Hazardous Location Products sub-section of Electro
Federation Canada’s (EEMAC) Wiring Products Section, a member of the
Advisory Committee for the Objective Based Industrial Electrical Code
(OBIEC), along with a number of other CSA Part 2 and IEC standards and
technical committees. He has authored and co-authored a number of papers
and articles on the subject of hazardous locations for the IEEE-PCIC, PCICEurope, IEEE-IAS Magazine, EX Magazine and other industry publications.
He advises on the development of, and is an instructor for, the CSA Learning
Centres’ course on Hazardous Location Fundamentals. He also conducts
training courses for the IAEI, IBEW, various industry groups and individual
companies on multiple subjects related to hazardous locations.
existing code. The major areas that will be discussed are:
 Re-certifying or adapting Division type equipment to IEC standards
 Re-certifying or adapting IEC Equipment to CEC® requirements
 Obtaining approval for products not certified to Canadian Standards
 Using European installation concepts for North American certified
cables
 Challenging specific Canadian Electrical Code rules
 Costs savings over traditional approaches are quantified where possible