Browsing by Author "Lucas, JR"

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  • Automatic Governor for Tie-line Control : A Teaching Tool 
    de Silva, LUN; Deegala, DDMI; Karunathilake, IMM; Kumari, PHSSDI; Lucas, JR; de Silva, PSN [Conference-Full-text]
    Power transmission between interconnected systems is a major concern in the present electrical engineering context and is of utmost importance to Electrical Engineering undergraduates. A voltage scaled power system simulator ...
  • Automatic governor for Tie-line control : a teaching tool 
    De Silva, LUN; Deegala, DDMI; Karunathilake, IMM; kUMARI, PHSSDI; Lucas, JR [Conference-Abstract]
    Power transmission between interconnected systems is a major concern in the present electrical engineering context and is of utmost importance to Electrical Engineering undergraduates. A voltage scaled power system simulator ...
  • Capacitance and tan δ measuring equipment for high voltage insulation modelling and simulation modelling and simulation 
    Gamage, CM; Nupehewa, JM; Kodikara, KKCS; Chathuranga, SAD; Samarasinghe, R; Lucas, JR [Conference-Full-text]
    Capacitance and tan δ measurements are usually carried out to check the healthiness of an insulation. Measuring equipment based on different methodologies to test insulation in cables, transformer bushings etc. are ...
  • Coconut oil as an alternative to transformer oil 
    Abeysundara, DC; Weerakoon, C; Lucas, JR; Gunatunga, KAI; Obadage, KC [Conference-Full-text]
    The paper presents a study which has been carried out to use coconut oil as insulation in transformers. Among the important properties considered are the dielectric strength of coconut oil which corresponds to less than ...
  • Condition monitoring system for outdoor insulators 
    Karunarathna, IMAM; Karunathilaka, KLT; Wanasinghe, WMHM; Sampath, GKL; Lucas, JR; Samarasinghe, R [Conference-Full-text]
    High Voltage insulators are vital components in transmission and distribution systems in a power network. Most of the insulators are used in open air applications where they are subjected to different environmental ...
  • Condition monitoring system for outdoor insulators 
    Karunarathna, IMAM; Karunathilaka, KTL; Wanasinghe, WMHM; Sampath, GKL; Lucas, JR; Samarasinghe, R [Conference-Abstract]
    High Voltage insulators are vital components in transmission and distribution systems in a power network. Most of the insulators are used in open air applications where they are subjected to different environment conditions. ...
  • Cost effective battery storage for intermittency of solar 
    Nayanathara, PMD; Perera, HS; Abeyrathne, RAHMPNN; Lucas, JR [Conference-Abstract]
    Renewable energy, especially Solar Energy, has become a popularly sought solution for the current energy situation in Sri Lanka. It is included in the ‘Long Term Generation Expansion Plan of the Ceylon Electricity Board ...
  • Cost effective battery storage for intermittency of solar 
    Nayanathara, PMD; Perera, HS; Abeyrathne, RAHMPNN; Lucas, JR [Conference-Abstract]
    Renewable energy, especially Solar Energy, has become a popularly sought solution for the current energy situation in Sri Lanka. It is included in the ‘Long Term Generation Expansion Plan of the Ceylon Electricity Board ...
  • A dc link for the power system simulator 
    Abeyrathne, PM; Abeysinghe, AMGT; Karunanayake, IM; Ranasinghe, PMH; Dias, MP; Lucas, JR [Conference-Full-text]
    High Voltage Direct Current (HVDC) links are used for bulk power transmission due to its advantages over the alternating current (ac) transmission. A HVDC link between India and Sri Lanka has also being proposed. Hence it ...
  • Determination of one dimensional earth resistivity profile in multilayer soil 
    Dharmadasa, IT; Lucas, JR; Udawatta, L; Wijayapala, WDAS [Conference-Extended-Abstract]
    Main intention of Geophysical resistrvity surveying is to interpret the subsurface conditions for engineering applications. The earth exhibits a far from uniform structure and therefore the surface resistivity varies ...
  • Develop a series arc fault detector to minimize the risk of domestic electrical fires 
    Somathilaka, SP; Sumathipala, WMKS; Senarathna, NT; Hewapathirana, HE; Hemapala, KTMU; Lucas, JR; de Silva, PSN [Conference-Abstract]
    This study is about the development of a series arc fault detector, which can be used to minimize the risk of domestic electrical fires. Electricity is a common cause of fire in residential buildings. If a parallel electrical ...
  • Effect of barrier and its shape over the breakdown voltage of oil gaps 
    Ediriweera, WEPS; Jayarathna, KLIMPB; Samarasinghe, R; Lucas, JR [Conference-Full-text]
    This paper studies the use of insulating barriers on the breakdown voltage of oil gaps upon two type of coconut oils under AC voltage. A point plane electrode arrangement connected to a AC transformer is used to find ...
  • Effect of the shape of the insulator on fractal characteristics of creeping discharges 
    Ediriweera, WEPS; Pramod, KLIM; Jayarathna, B; Lucas, JR; Samarasinghe, R [Conference-Full-text]
    This paper studies the use of circular boundary and square boundary configurations for analyzing fractal characteristics of creeping discharges over solid dielectric materials. A two dimensional stochastic dielectric ...
  • Improved simulation models for current and voltage transformers in relay studies 
    Lucas, JR; McLaren, PG; Keerthipala, WWL; Jayasinghe, RP [Article-Full-text]
    Improved models for current transformers (CT), potential transformers, and capacitive voltage transformers (CVT) for a relay software library are presented. The magnetizing characteristic in each of these transformers is ...
  • An improved wide frequency model for VFTO of power transformers using transfer functions 
    Jayarathna, KLIMPB; Ediriweera, WEPS; Samarasinghe, R.; Lucas, JR [Conference-Full-text]
    An accurate understanding of power transformer high frequency behavior is very important to assess the impacts on power system due to transient over-voltage conditions. An improved method of modeling power transformer ...
  • Influence of water and powder contaminants on dielectric strength of transformer oil 
    Abeyrathna, MSM; Karunaratne, MMLK; Kahingala, KPV; Samarasinghe, R; Lucas, JR [Conference-Full-text]
    Transformer failure statistics reveal that most of the transformer failures are due to insulation failures, where a considerable fraction of that percentage is caused by oil contamination. In this paper, the influence of ...
  • Log periodic antenna based partial discharge detector for condition monitoring of high voltage insulators 
    De Zoysa, HRT; Madushani, MGD; Siriwardhana, GDK; Wijethunge, KUNSS; Lucas, JR; Samarasinghe, R [Conference-Full-text]
    This paper discusses the use of electromagnetic method of partial discharge detection for detecting and localizing partial discharges in high voltage insulators. In a power system, the condition of power line insulation ...
  • A matlab simulink model for a partial discharge measuring system 
    Gunawardana, SDMS; Kanchana, AAT; Wijesingha, PM; Perera, HAPB; Samarasinghe, R; Lucas, JR [Conference-Full-text]
    Failures in high voltage equipment are often caused due to internal faults which cause a local electrical stress concentration in the insulation; called as partial discharge. Therefore partial discharge detection is highly ...
  • Microstrip patch antenna for partial discharge detection as a condition monitoring tool of power system assets 
    Ediriweera, weps; Priyanayana, KS; Rajakaruna, RMAP; Ranasinghe, Rakg; Lucas, JR; Samarasinghe, R [Conference-Abstract]
    An electric power system consists of a number of critical and expensive equipment that operate under high electric stresses. Failure of such an asset can lead to unscheduled interruptions and incur huge economic losses. ...
  • Modelling transfer function of power transformers using sweep frequency response analysis 
    Pramod, KLIM; Jayarathna, B; Ediriweera, WEPS; Lucas, JR; Samarasinghe, R [Conference-Full-text]
    Sweep Frequency response analysis is a widely used condition monitoring technique of power transformers that includes interpreting transfer function in frequency domain. This paper presents a novel approach to model the ...