Research Repository: Recent submissions

  • Control of a Battery Supported Dynamic Voltage Restore 
    Ramachandaramurthy, V.K.; Fitzer, C.; Arulampalam, A.; Zhan, C.; Barnes, M.; Jenkins, N. (IEE Proceedings on Generation Transmission and Distribution, 2002-09)
    Control of a Dynamic Voltage Restorer (DVR) based on Space Vector PWM is described. The control algorithm is able to compensate for any type of voltage sag and uses a software phase-locked loop to track phase jumps during ...
  • Compensation Techniques of the Dynamic Voltage Restorer for Single Phase Voltage Sags 
    Perera, M.V.K.; Atputharajah, A.; Alahakoon, A.M.U.S.K. (Peradeniya University Research Sessions 2006 proceedings, 2006-11-30)
    Power quality associated problems such as voltage sag, surge (swell), flicker, imbalance, interruptions and harmonics become a major concern. These power quality problems affect the performance of the microprocessor based ...
  • Electrical Power Exchange in GMS and Its Influence on Power Systems in Vietnam and Thailand 
    Linh, T.T.D.; Mithulananthan, N.; Lomi, A.; Atputharajah, A.; Yome, A.S. (Second IEEE International Conference on Sustainable Energy Technologies, 2010-12)
    The paper aims to identify the development of power interconnection network in the Greater Mekong Sub-region (GMS) which is a part of the major energy infrastructure mandated by ASEAN delegates in 1997. An overview of power ...
  • A Survey of Harmonic Current at Several Industries in Sri Lanka 
    Gajanayake, C.J.; Ramtharan, G.; Samaraweera, G.K.; Atputharajah, A.; Ekanayake, J.B. (Journal of the National Science Foundation, 2005-09-03)
    In Sri Lanka, since early 1980s there has been rapid growth in electrical demand for the industrial and domestic consumers. As a result, various types of electrical, electronic and computer equipment, that either polluting ...
  • Mitigation of Saturation in Dynamic Voltage Restorer Connection Transformers 
    Fitzer, C.; Arulampalam, A.; Barnes, M.; Zurowski, R. (IEEE Transactions on Power Electronics, 2002-11)
    During the transient period at the start of a voltage sag, a DVR injection transformer can experience a flux-linkage that is up to twice its nominal steady-state value. In order to prevent the transformers from saturating ...
  • Four-wire Dynamic Voltage Restorer Based on a Three-Dimensional Voltage Space Vector PWM Algorithm 
    Changjiang, Z.; Arulampalam, A.; Jenkins, N. (IEEE Transactions on Power Electronics, 2003-07-04)
    A modified voltage space vector pulse-width modulated (PWM) algorithm for a four-wire dynamic voltage restorer (DVR) is described. The switching strategy based on a three-dimensional (3-D) αβ0 voltage space is applicable ...
  • Dynamic Voltage Restorer based on Voltage-space-vector PWM Control 
    Changjiang, Z.; Ramachandaramurthy, V.K.; Arulampalam, A.; Fitzer, C.; Kromlidis, S.; Barnes, M.; Jenkins, N. (IEEE Sixteenth annual Applied Power Electronics conference and Exposition, 2001)
    A dynamic voltage restorer (DVR) based on the voltage-space-vector pulse width-modulation algorithm is presented. Phase-jump compensation is achieved using a software phase-locked loop and a lead-acid battery energy store. ...
  • Capability Chart of a Doubly Fed Induction Generation based on its Ratings and Stability Margin 
    Tennakoon, A.P.; Ekanayake, J.B.; Arulampalam, A.; Abeyratna, S.G. (IEEE 45th Universities’ Power Engineering Conference, 2010-09-03)
    The limitations with regard to the capability of Doubly Fed Induction Generator based wind turbines arediscussed. The importance of considering the stability marginwhen constructing the capability curve was highlighted. ...
  • Protection System for a Commercial Dynamic Reactive Power Compensator 
    Bandara, R.W.K.M.R.K.D.; Tharaka, R.M.R.; Tennakoon, A.P.; Navaratne, D.N.; Alagoda, S.; Arunprasanth, S.; Atputharajah, A.; Fernando, M.A.R.M.; Aberatne, S.G. (The 19th Conference on Electric Power Supply Industry, 2012-10-19)
    Power systems loads are very dynamic. Varying reactive power causes voltage fluctuations, line overloading, increase power transmission loss and some critical operations may lead to voltage instability. As a smart solution, ...
  • Power Quality Problems and Solutions 
    Atputharajah, A.; Ramachandaramurthy, V.K.; Pasupuleti, J. (4th International Conference on Energy and Environment, 2013-03-06)
    This paper addresses the power quality problems and solutions related to (i) wind power generation and (ii) large industrial customers. Intermittent nature of wind power affects the quality of its electrical power output. ...
  • Multi-Level Converters and Switching Techniques 
    Arunprasanth, S.; Jeyadarsan, T.; Atputharajah, A. (105th Annual conference session of the Institution of Engineers Sri Lanka, 2011-10)
    The power electronic converters play major role in keeping the operations of power system continuous and stable together with fault-ride through, power quality and safety. The high power and higher controllability requirement ...
  • Integrated Solution for Power System Stability Improvement: Case studies on IEEE 12 Bus and Sri Lankan transmission networks 
    Arunprasanth, S.; Vivekanandan, C.; Atputharajah, A.; Fernando, M.A.R.M. (IEEE 6th International Conference on Industrial and Information Systems, 2011-08)
    Dramatic increase in electric energy demand results the power system network to span in a large scale, consequently increasing the possibility of power disturbances, which may lead towards major blackouts. Therefore the ...
  • Dynamic Reactive Power Compensator (DRPC) for Unbalance Load Reactive Power Compensation 
    Arunprasanth, S.; Arulampalam, A.; Binduhewa, P.J.; Fernando, M.A.R.M.; Abeyratna, S.G. (IEEE 8th International Conference on Industrial and Information Systems, 2013-12)
    Unbalance in power system caused by the addition of single phase and dynamically varying loads are unavoidable. Due to this reason the load reactive power is no longer balanced, which causes voltage fluctuation, line ...
  • Simulated onshore-Fault Ride Through of Offshore Wind Farms Connected through VSC HVDC 
    Arulampalam, A.; Ramtharan, G.; Caliao, N.; Ekanayake, J.B.; Jenkins, N. (Journal of Wind Engineering, 2008-03)
    Effective Onshore-Fault Ride Through was demonstrated by simulation for a Fixed Speed Induction Generator (FSIG) offshore wind farm connected through a Voltage Source Converter HVDC link. When a terrestrial grid fault ...
  • Power Quality and Stability Improvement of a Wind Farm using STATCOM Supported with Hybrid Battery Energy Storage 
    Arulampalam, A.; Barnes, M.; Jenkins, N.; Ekanayake, J.B. (IEE Proceedings on Generation Transmission and Distribution, 2006-11-06)
    A large penetration of wind generation info the power system will mean that poor power quality and poor stability margins cannot be tolerated from wind farms. This requires that methods to improve power qualify and stability ...
  • Control of Power Electronic Interfaces in Distributed Generation Microgrids 
    Arulampalam, A.; Barnes, M.; Engler, A.; Goodwin, A.; Jenkins, N. (International Journal of Electronics, 2004-09-09)
    Technological advances and environmental pressures are driving the interconnection of renewable energy sources to the distribution network. The interconnection of large amounts of non-traditional generation however causes ...
  • Application Study of a STATCOM with Energy Storage 
    Arulampalam, A.; Ekanayake, J.B.; Jenkins, N. (IEE Proceedings on Generation Transmission and Distribution, 2003-05)
    With recent advances in energy storage technology the application of STATCOMs with energy storage for utility applications, such as active- and reactive-power compensation of loads, network-voltage control and mitigation ...
  • Study of Northern Province Medium Voltage Network Interconnection with the Sri Lankan Power Grid 
    Ananthasingam, A.; Shailajah, R.; Yoganathan, N.; Arunprasanth, S.; Arulampalam, A.; Fernando, M.A.R.M. (106th Annual conference session of the Institution of Engineers Sri Lanka, 2012-10)
    Interconnection of power systems will strengthen the power grid because of the large inertia addition. However, interconnection of long distanced large loads and generating plants causes problems like voltage drops, line ...
  • A Prefeasibility Study on Ocean Wave Power Generation for the Southern Coast of Sri Lanka: Electrical Feasibility 
    Amarasekara, H.W.K.M.; Abeynayake, P.A.G.S.; Fernando, M.A.R.M.; Atputharajah, A.; Udanwaththa, D.M.A.R.; Gunawardane, S.D.G.S.P.; Gerdin, L.; Keijser, M.R.; Fahraeus, M.W.; Fernando, I.M.K.; Cooray, V. (International Journal of Distributed Energy Resources and Smart Grids, 2014)
    This paper presents the details of a prefeasibility study carried out about the ocean wave power generation for the southern coastal area of Sri Lanka. It includes a brief review on wave energy devices appropriate for wave ...
  • Efficient way of using Solar System to the Households’ Normal Applications 
    Amalendran, J.; Atputharajah, A. (International Conference on Solar Energy Materials, Solar Cells and Solar Energy Applications (Solar Asia 2011), Institute of Fundamental Studies, 2011-07-28)
    This paper discusses about how a solar cell can be used efficiently and effectively for normal home usages such as: pumping water to the overhead tank and other home electrical goods. Efficient and effective usage of solar ...