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Non-Linear Load Identification

LocationSPEC, Partners I, room 1250
DateMarch 23, 2007 1:00 PM

SPEC is pleased to have Prof. Jan-Harm C. Pretorius

 

University of Johannesburg , Johannesburg,

 

for a seminar this Friday 3/23 at 1 pm in Partners I, room 1250

 

Abstract: A nonlinear load not only determines the cost of the power to the utility, but also the quality of the power delivered to other customers. Because of this several techniques had been suggested in literature by which it would be possible to measure the extent of the distortion for purposes of revenue, and several standards governing the transmission of electric power make use of these definitions. Most notably are the concepts of total harmonic distortion, power factor and harmonic adjusted power factor.

 

By assuming that the type of relationship between voltage and current remain relatively constant for a specific load, a concept utilizing the correlation of the time dependant voltage and current waveforms are introduced. Several correlation indices are defined and it is shown that the values of these indices do not change substantially in the presence of multiple loads. These correlation indices could therefore be used to identify the load type.

Speaker:  

 

Jan-Harm Pretorius obtained his BSc Hons (Electrotechnics)(1980), MIng(1982) and DIng(1997) degrees in Electrical and Electronic Engineering at the Rand Afrikaans University , and an MSc (Pulse Power and Laser Physics) at the University of St Andrews in (1989) – Cum Laude. He is a trained Baldridge (USA) and South African Excellence Foundation (SAEF) assessor. He worked at the South African Atomic Energy Corporation as a Senior Consulting Engineer for fifteen years. He also worked as the Technology Manager for the Satellite Applications Centre (CSIR). He was appointed Associated Professor at RAU in October 1998. He is currently a Professor in Electrical and Electronic Engineering and Vice Dean of the Faculty of Engineering and the Built Environment. He is the author and co-author of several research papers. He is a registered professional engineer and a member of the Institute of Electrical and Electronic Engineers USA (IEEE) and the South African Institute of Electrical and Electronic Engineers (SAIEE).

 

 

 

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