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Abstract
Utilising the standard AS/NZS 61000.3.6 to carry out a harmonic allocation to a load in a transmission system requires detailed knowledge of the location and magnitude of every future load. Given that the size of the load at a bus in a transmission system could conceivably be from zero up to around thirty percent of the fault level, such knowledge is unlikely to be available with any degree of certainty. This paper proposes an allocation policy which reduces the effect of load uncertainty, by allocating harmonic emission levels to areas comprising buses which are electrically close. Possible techniques are demonstrated using a simple test network.
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Notes on contributors
T J Browne
Tim Browne graduated from the University of New South Wales in 2001 with a BE (Electrical) degree. Prior to commencing work on a PhD in power system harmonics at the University of Wollongong in 2003, he was with the Sydney-based distribution utility EnergyAustralia. He joined the academic staff at the University of Wollongong in 2007. Current research interests are power system harmonics and modelling.
V J Gosbell
Vic Gosbell was a cadet engineer with Sydney County Council while an undergraduate student. He obtained his PhD in 1971 from the University of Sydney with work on the asynchronous operation of turbogenerators. In 1972 he commenced lecturing at the University of Sydney where his research interests included model power systems, power system stability, HVDC transmission, power electronics and variable speed motor drives. In 1990 he took up the position of Associate Professor at the University of Wollongong where he is working on power electronic simulation, harmonics and power quality.
He is a member of the Standards Australia “Power Quality” Committee, a Fellow of the Institution of Engineers, Australia and past Chairperson of the Australasian Committee for Power Engineering.
S Perera
Sarath Perera (Associate Professor) graduated from the University of Moratuwa, Sri Lanka with a BSc (Eng) specialising in Power. He obtained his MEngSc from the University of New South Wales and PhD from the University of Wollongong. He has been on the academic staff at the University of Wollongong since 1988. He has been active in electromagnetic modelling, machine design and analysis, in particular permanent magnate machines. His current research interests are in the general area of power quality and in particular voltage fluctuations and flicker. He also has strong interests in modelling and simulation. He is a member of the Standards Australia Committee on Power Electronics. He is currently the Technical Director of the Integral Energy Power Quality and Reliability Centre.