Coordination of Power System Harmonic Levels Between Transmission Utilities and Customers
Speaker: Dr Timothy Browne, Arizona State University
When: 2008-05-16 11:00:00
Venue: 78-621
Host: Prof Tapan Saha
Abstract:Power system harmonics can have adverse effects upon connected
equipment, in both utility and customer premises. Examples include
reduction in AC machine life, degradation of insulation and
misoperation of power electronic equipment. As worldwide power
system harmonic levels increase, due largely to increased
implementation of power electronic equipment, a balance is required
between rights to inject harmonic distortion and rights to
experience non-damaging levels of distortion.
Harmonic standards recommend limits on the harmonic current to be
injected into the network by a customer or other connected
entity. Key harmonic guides are IEEE-519, used predominantly in
North America, and IEC/TR 61000-3-6, required in much of the rest of
the world as a consequence of the General Agreement on Tariffs and
Trade. Each of these documents is a compromise between theoretical
requirements and practical considerations. Transmission utilities
are charged with the responsibility for managing harmonic voltages
in the network; customers are given limits on harmonic current
emissions. However, effects of interactions between the network
voltage and customer current limits require further investigation.
An approach to harmonic allocation will be presented which follows
the guiding principles of IEC/TR 61000-3-6 while being readily
implementable by utilities and customers. A proposed methodology for
selection of harmonic current emission limits will be
given. Practical problems, such as handling of resonant conditions
and limitations on available network data, will also be examined.
Biography:Timothy Browne received the Bachelor of Engineering degree in
electrical engineering in 2001 from the University of New South
Wales, and the Ph.D. degree in 2008 from the University of
Wollongong, where he held the position of Lecturer during 2006. In
2007 he joined Arizona State University where he is presently an
adjunct associate. His research interests include electric power
quality, harmonics in transmission and distribution systems, power
system dynamics, sensor applications in electric power systems, and
power engineering education. Browne is a member of the IEEE Power
Engineering Society and the Institution of Engineers, Australia.
Type: ITEE Seminar
Contact:Prof Tapan Saha, seminar host (saha@itee.uq.edu.au)
or Guido Governatori (ITEE seminar co-ordinator)
(guido@itee.uq.edu.au)