Browsing Faculty of Engineering by Title

Object-oriented embedded C

Van Schoor, George; Neser, Morné (IEEE, 2009)

This paper presents an object-oriented implementation of ANSI-C for embedded systems. It offers practical guidelines for producing generic software libraries and portable applications. While various object-oriented ...

The occurrence of hazardous volatile elements and nanoparticles in Bulgarian coal fly ashes and the effect on human health exposure

Silva, Luis F.O.; DaBoit, Kátia; Sampaio, Carlos H.; Jasper, André; Waanders, Frans B. (Elsevier, 2012)

Low-rank, high-mineral matter Bulgarian coals were studied using a variety of chemical, optical, and electron beam methods. The larger fly ash carbon phases include charred carbons in contrast to coked carbons present in ...

Occurrence of the hazardous elements in agricultural soils surrounding a coal power plant complex from Santa Catarina (Brazil)

De Medeiros, Diego; Waanders, F.; Oliveira, M.; Da, F.; Silva, L. (International Pittsburgh Coal Conference, 2016)

Off Line Partial Discharge as an essential Condition Based Monitoring (CBM) Tool for busbar insulation monitoring on Air Insulated Switchgear (AIS)

Bissett, J.V.; Van Vuuren, P.A. (NWU, 2018)

This paper investigates the effectiveness of current test methods and procedures associated with insulation testing on the busbar of Air Insulated Switchgear (AIS) during scheduled planned maintenance. An improved test ...

On harmonic emission assessment: a discriminative approach

Peterson, B.B.; Rens, J.; Botha, M.G.; Desmet, J. (SAIEE, 2017)

An improvement in the assessment of harmonic emissions as contributed by renewable generation such as a Photovoltaic (PV) plant, at a Point of Connection (PoC) to a distribution network, is needed. Both the generating ...

On systematic generator matrices for Reed-Solomon codes

Versfeld, Daniel J.J.; Helberg, Albert S.J.; Ridley, James N.; Ferreira, Hendrik C. (IEEE, 2010)

We derive a simple formula to generate a wide-sense systematic generator matrix B for a Reed-Solomon code. Specifically, we generate the generator matrix B such that the columns with indices ¿ 1 , ¿ 2 ,..., ¿ k are the ...

On the assessment of harmonic emission in distribution networks: opportunity for the prevailing harmonic phase angle

Peterson, Brandon; Rens, Johan; Botha, Gerhard; Meyer, Jan; Desmet, Jan (IEEE, 2016)

Harmonic emission assessment for Grid Code compliance of Renewable Power Plants (RPP) has to be fair and pragmatic. The CIGRE C4.109 method lacks the ability to determine which harmonic currents have a positive or negative ...

On the assessment of voltage unbalance

Seiphetlho, T.E.; Rens, A.P.J. (IEEE, 2010)

The management of voltage unbalance in a power system is supported by the knowledge on the contribution of a single unbalanced load/source to the total level of voltage unbalance observed at a Point of Common Coupling (PCC) ...

On the contamination of membrane-electrode assembles of water electrolyzers with solid polymer electrolyte by the elements of titanium alloys

Grigoriev, S.A.; Bessarabov, D.G.; Glukhov, A.S. (Springer, 2017)

The aspects of contamination of membrane–electrode assemblies of water electrolyzers with solid polymer electrolyte by the elements of titanium alloys (Ti and Fe) are considered. These alloys are used as the material for ...

On the development of a power quality benchmarking model

Rens, Johan (IEEE, 2009)

The development of a Power Quality (PQ) Benchmarking model is presented. Practical results are discussed to motivate the need of adding value to recorded PQ data by means of benchmarking PQ performance. The importance, ...

On the influence of methanol addition on the performances of PEM fuel cells operated at subzero temperatures

Ivanova, Nataliya A.; Grigoriev, Sergey A.; Spasov, Dmitry D.; Kamyshinsky, Roman A.; Peters, Georgy S. (Elsevier, 2020)

The storage and the operation of proton exchange membrane fuel cells (PEM FCs) at subzero temperatures result in the ageing and degradation of membrane-electrode assemblies (MEAs). In this study, we investigated the effect ...

On the remote calibration of voltage transformers: validation of opportunity

Rens, Sané; Rens, Johan; Holm, Johann; Botha, Gerhard; Desmet, Jan (IEEE, 2018)

Remote calibration of instrument transformers seems possible if sufficient certainty in field measurements can be achieved. This opportunity, until now, was only investigated from a theoretical point of view and in this ...

On the reporting of power quality

Rens, Johan; Stander, Tiaan (IEEE, 2011)

The reporting of power quality (PQ) requires consideration as different users of information on Quality of Supply (QoS) have different needs. Reporting on the compliancy of voltage regulation in terms of a PQ standard can ...

On the role of magnetic shunts for increasing performance of transverse flux machines

Dobzhanskyi, Oleksandr; Gouws, Rupert; Amiri, E. (IEEE, 2017)

This paper presents work completed in order to investigate the importance of magnetic shunts in transverse flux machines. Two types of transverse flux machines with different configurations were designed and tested in the ...

On the wing density and the inflation factor of aircraft

Huyssen, R.J.; Mathews, E.H.; Liebenberg, L.; Spedding, G.R. (Royal Aeronautical Soc, 2016)

The aviation industry is dominated by the domain of heavier-than-air, fixed-wing, subsonic flight, and central to any design in this domain is the wing itself. One of the earliest debates in aviation still centres around ...

On-line performance monitoring of a transmission line using synchrophasor measurements

De Jager, F.A.; Rens, A.P.J. (IEEE, 2015)

Synchrophasors are increasingly being implemented to improve the understanding of network performance. This paper presents the use of voltage and current synchrophasors in the on-line performance monitoring of a transmission ...

Ontwerp van 'n energiebestuurstelsel vir optimale energieverbruik en effektiwiteit van 'n distribusievlakmikrokragnetwerk

Bisschoff, W.A.; Gouws, R. (2014)

South African state-owned utility company, Eskom, is under severe pressure to ensure the stability and reliability of the national electricity grid. With a shortfall in capacity of the national electricity grid, the ...