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Articles 31 - 39 of 39
Full-Text Articles in Physical Sciences and Mathematics
Optimisation Of Distributed Generation Units And Shunt Capacitors For Economic Operation Of Distribution Systems, Kai Zou, Sarath Perera, Kashem Muttaqi, Ashish P. Agalgaonkar
Optimisation Of Distributed Generation Units And Shunt Capacitors For Economic Operation Of Distribution Systems, Kai Zou, Sarath Perera, Kashem Muttaqi, Ashish P. Agalgaonkar
Associate Professor Sarath Perera
The integration of Distributed Generation (DG) units and shunt capacitors can be considered as an alternative approach for distribution system expansion planning not only to improve power supply quality and reliability, but also to defer major system updates. In this paper, the techno-economic issues of distribution system expansion planning with optimal sizing and siting of DG units and shunt capacitors are addressed. The minimisation of overall investment cost with the integration of DG units and shunt capacitors is assessed with the consideration of supply quality, reliability and energy loss. A new planning methodology by using Particle Swarm Optimisation (PSO) is …
Supply Current Charactersistics Of Modern Domestic Loads, Sean T. Elphick, Sarath Perera, Philip Ciufo
Supply Current Charactersistics Of Modern Domestic Loads, Sean T. Elphick, Sarath Perera, Philip Ciufo
Associate Professor Sarath Perera
The domestic load is considerably different to that seen 10 to 15 years ago. It has evolved significantly in terms of consumption and characteristics. In addition to traditional resistive and refrigeration type loads, the modern domestic load is now likely to contain a variety of sophisticated devices mostlypowered and controlled by power electronics. This paper examines the power quality characteristics of the modern domestic load. Laboratory testing and mathematical analysis is used to quantify and predict the behaviour of loads operating individually and in parallel. Specifically examined is thebehaviour and variation in harmonic current magnitudes across a variety of loads.
Behavioural Modelling Of High Temperature Superconducting Wires And Coils For Power Engineering Applications, Thomas Hardjono, Christopher David Cook, Sarath Perera
Behavioural Modelling Of High Temperature Superconducting Wires And Coils For Power Engineering Applications, Thomas Hardjono, Christopher David Cook, Sarath Perera
Associate Professor Sarath Perera
Many aspects of the behaviour of high temperature superconducting (HTS) wires are well understood for dc applications. However, models of HTS suitable for use in circuit analysis by power engineers designing HTS applications are not readily available. This paper describes the initial development of suitable models for HTS wire. The V-I characteristics for wires carrying dc transport current can be empirically determined using a power law V=kIn. Experimentally measured V-I characteristics are fitted using the above power law. This enables the simulation of the behaviour of Bi-2223/Ag wire using the well-known circuit simulator PSpice. Other factors affecting the dc critical …
Review Of Flicker Objectives For Lv, Mv And Hv Systems, Detmar Arlt, Herivelto Bronzeado, Rong Cai, Emmanuel De Jaeger, Zia Emin, David Guillot, Mark Halpin, Naoki Kobayashi, Matti Lahtinen, Igor Papic, Francisco Pazos, Sarath Perera, Jeremy Price, Herwig Renner, Xavier Yang, Francisc Zavoda
Review Of Flicker Objectives For Lv, Mv And Hv Systems, Detmar Arlt, Herivelto Bronzeado, Rong Cai, Emmanuel De Jaeger, Zia Emin, David Guillot, Mark Halpin, Naoki Kobayashi, Matti Lahtinen, Igor Papic, Francisco Pazos, Sarath Perera, Jeremy Price, Herwig Renner, Xavier Yang, Francisc Zavoda
Associate Professor Sarath Perera
No abstract provided.
Power Quality: Recommendations For The Application Of As/Nzs 61000.3.6 And As/Nzs 6100.3.7, Victor Gosbell, Sarath Perera, Victor Smith, D Robinson, Graeme Sanders
Power Quality: Recommendations For The Application Of As/Nzs 61000.3.6 And As/Nzs 6100.3.7, Victor Gosbell, Sarath Perera, Victor Smith, D Robinson, Graeme Sanders
Associate Professor Sarath Perera
No abstract provided.
Hydrogen Energy Storage For A Permanent Magnet Wind Turbine Generator Based Autonomous Hybrid Power System, Nishad Mendis, Saad Sayeef, Kashem Muttaqi, Sarath Perera
Hydrogen Energy Storage For A Permanent Magnet Wind Turbine Generator Based Autonomous Hybrid Power System, Nishad Mendis, Saad Sayeef, Kashem Muttaqi, Sarath Perera
Associate Professor Sarath Perera
The Performance of a novel hybrid Remote Area Power Supply (RAPS) system consisting of a Permanent Magnet Synchronous Generator (PMSG), fuel cell system, electrolyser and synchronous condenser is investigated in this paper. The fuel cell system is used to provide power during under-generation scenarios whereas the electrolyser absorbs excess power during over-generation conditions. A synchronous condenser is incorporated into the RAPS system to provide better reactive power and inertial support. Individual controllers for each system module have been developed and implemented. A control coordination methodology is established with a view to regulate the active and reactive power balance of the …
Harmonics And Flicker Levels At A Sub-Transmission Substation: A Measurement Experience, D Robinson, Victor Gosbell, Sarath Perera, N Browne
Harmonics And Flicker Levels At A Sub-Transmission Substation: A Measurement Experience, D Robinson, Victor Gosbell, Sarath Perera, N Browne
Associate Professor Sarath Perera
Proactive monitoring of power quality disturbance levels by electricity utilities is vital to allow cost-effective mitigation when disturbances are perceived to be approaching planning levels and also to protect the security of customer installations. Ensuring that disturbance levels are within limits at the HV and EHV points of supply of the network is essential if satisfactory levels downstream are to be maintained. This paper presents discussion on a power quality monitoring campaign performed at the sub-transmission point of supply of a distribution network with the objective of benchmarking background disturbance levels prior to modifications to the substation and to ensure …
Conditions For The Assessment Of The Harmonic Compliance Of An Installation, Timothy J. Browne, Sarath Perera, Victor J. Gosbell
Conditions For The Assessment Of The Harmonic Compliance Of An Installation, Timothy J. Browne, Sarath Perera, Victor J. Gosbell
Associate Professor Sarath Perera
Methods of allocating harmonic emission limits to customer installations have evolved considerably, as evidenced by the development of harmonic guides such as IEEE-519 and IEC/TR 61000-3-6. However, there is only limited consensus on appropriate techniques validating compliance of installations with those limits. Existing techniques are reviewed and related problems are examined. Conditions which acceptable tests of compliance should meet are proposed.
Harmonic Survey Of An Mv Distribution System, Victor J. Gosbell, Damian Mannix, D A. Robinson, Sarath Perera
Harmonic Survey Of An Mv Distribution System, Victor J. Gosbell, Damian Mannix, D A. Robinson, Sarath Perera
Associate Professor Sarath Perera
The harmonic survey of a medium voltage distribution system involves three major aspects: (i) the choice of harmonic monitor, (ii) the choice of monitoring site, (iii) processing and presentation of results. As well as a discussion of the methodology for these aspects, the paper will discuss the harmonic levels measured, the minimum survey requirements for finding useful data and the harmonic parameters of residential, commercial and industrial loads.