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Harmonic Allocation Constant For Implementation Of As/Nzs 61000.3.6, D A. Robinson, Victor J. Gosbell, Sarath Perera
Harmonic Allocation Constant For Implementation Of As/Nzs 61000.3.6, D A. Robinson, Victor J. Gosbell, Sarath Perera
Faculty of Informatics - Papers (Archive)
Allocation of equal harmonic emission rights to MV customers having the same maximum demand is a key concept in the new Australian harmonic standard AS/NZS 61000.3.6 [1]. Some difficulty can arise with the application of the standard when customers are spread out along a feeder with significantly different fault levels. One proposed method of overcoming this problem is to reduce the allocation as the square root of the fault level [2]. This method requires the calculation of an allocation constant that is applied to all customers connected to the same zone substation. This paper gives a methodology for calculating the …
The Application Of Iec 61000-3-6 To Mv Systems In Australia, Victor J. Gosbell, D A. Robinson, Sarath Perera, Alex Baitch
The Application Of Iec 61000-3-6 To Mv Systems In Australia, Victor J. Gosbell, D A. Robinson, Sarath Perera, Alex Baitch
Faculty of Informatics - Papers (Archive)
IEC 61000-3-6 [1] comprises a number of stages and tests to determine harmonic emission allowances for customers connected to MV or HV networks. Of particular importance is the section concerning loads distributed along a feeder, each having a different fault level. Although a common situation, the treatment given in the IEC standard is poorly described, being largely illustrated by one atypical example. This allows simplifying assumptions to be made which are invalid in practical cases. This paper outlines a more general approach that is relatively easy to apply.
Cognitive And Social/Behavioural Development At 3-4 Years In Relation To Family Background, Edward Melhuish, Louise Quinn, Kathy Sylva, Pam Sammons, Iram Siraj-Blatchford, Brenda Taggart, Kathleen Mcsherry, Mark Mccrory
Cognitive And Social/Behavioural Development At 3-4 Years In Relation To Family Background, Edward Melhuish, Louise Quinn, Kathy Sylva, Pam Sammons, Iram Siraj-Blatchford, Brenda Taggart, Kathleen Mcsherry, Mark Mccrory
Faculty of Social Sciences - Papers (Archive)
This longitudinal study assesses the attainment and development of children followed between the ages of 3 and 7 years. Over 700 children were recruited to the study during 1998 and 1999 from 80 pre-school centres. Both qualitative and quantitative methods (including multilevel modelling) are used to explore the effects of pre-school experience on children's cognitive attainment and social/behavioural development at entry to school and any continuing effects on such outcomes up to 7 years of age. In addition to the effects of preschool experience, the study investigates the contribution to children's development of individual and family characteristics such as gender, …