Faculty of Engineering: Recent submissions

  • Application of a Static Reactive Power Compensator (STATCOM) and a Dynamic Braking Resistor (DBR) for the Stability Enhancement of a Large Wind Farm 
    Xueguang, W.; Arulampalam, A.; Changjiang, Z.; Jenkins, N. (Journal of Wind Engineering, 2003-06)
    A control strategy to improve the stability of a large wind farm using a Static Reactive Power Compensator (STATCOM) and Dynamic Braking Resistor (DBR) is proposed and investigated. The STATCOM supplies the reactive power ...
  • Novel C2R-R Configuration for Micro-hydro Plants used in Islanded Systems 
    Weerakoon, T.S.; Chandrasena, R.P.S.; Arulampalam, A. (Journal of Energy and Environment, 2009-04)
    This paper presents a novel strategy used to obtain single phase power from three phase power generated through a three phase induction generator. In pico and micro hydro power generations in rural areas, the traditional ...
  • Development of Digital Control System for Current and Temperature Control of an Electrodialyser 
    Walgama, K.S.; Ekanayake, J.B.; Atputharajah, A. (Journal of the Institution of Engineers, 2000-05)
    The electrodialyser lab process used for the treatment of black liquor, the liquid effluent from pulp industry, needs to be controlled for the efficient performance, and for the parametric study and mathematical modeling ...
  • Wind Turbine Emulator 
    Vaheeshan, J.; Vihirthanath, V.; Abeyaratne, S.G.; Atputharajah, A.; Ramatharan, G. (IEEE 6th International Conference on Industrial and Information Systems, 2011-08)
    The paper presents the development of a DC motor based Wind Turbine Emulator (WTE) and its performance verification through simulation. The torque signal that represents the actual wind turbine with environmental effect ...
  • A Novel Concept for Static VAR Compensators 
    Tharaka, R.M.R.; Bandara, R.W.K.M.R.K.D.; Abeyratna, S.G.; Atputharajah, A.; Fernando, M.A.R.M.; Navarathne, D.N. (IEEE 8th International Conference on Industrial and Information Systems, 2013-12)
    A new configuration to replace the Thyristor Controlled Reactor (TCR) of a Static VAR Compensator (SVC) by a DC link voltage controlled inductor is proposed in this paper. In this proposed technique, the reactor current ...
  • Stability Margin of DFIG wind turbines: effects and solutions 
    Tennakoon, A.P.; Ekanayake, J.B.; Arulampalam, A.; Abeyaratne, S.G. (Journal of Wind Engineering, 2011)
    Doubly Fed Induction Generator (DFIG) based wind farms are one of the major contributors to wind power generation. Even though they possess advantages such as the capability of generating active power over an extended range ...
  • Improvement of Voltage Profile and Stability of Wind-farm Connected Medium-voltage Distribution Networks: A case study 
    Tennakoon, A.P.; Arulampalam, A.; Ekanayake, J.B. (Annual Transaction of the Institution of Engineers, 2004)
    Many countries have now recognized wind as a sustainable source of energy and the installed capacity of wind generation worldwide now exceeds 25GW. In Sri Lanka very little emphasis is given for wind generation. No major ...
  • Fault Ride through of Fully Rated Converter Wind Turbines with AC and DC transmission systems 
    Ramtharan, G.; Arulampalam, A.; Ekanayake, J.B. (IET proceedings on Renewable Power Generation, 2009-12)
    Fault ride through of fully rated converter wind turbines in an offshore wind farm connected to onshore network via either high voltage AC (HVAC) or high voltage DC (HVDC) transmission is described. Control of the generators ...
  • Constant Frequency Control of an Active Power Filter 
    Ramtharan, G.; Abeyaratne, S.G.; Atputharajah, A. (Journal of the National Science Foundation, 2006-03-01)
    Active Power Filters (APFs) improve the utility by correcting harmonic distortions created by non-linear loads. It also correct for the poor power-factor resulted due to inductive loads. Topologies and control techniques ...
  • Supervisory Control of Dynamic Voltage Restores 
    Ramachandaramurthy, V.K.; Arulampalam, A.; Fitzer, C.; Zhan, C.; Barnes, M.; Jenkins, N. (IEE Proceedings on Generation Transmission and Distribution, 2004-07)
    The impact of system issues on the performance and power rating of dynamics voltage restorers is examined. Algorithms to restore a network voltage sag or swell to given set points have been the subject of significant research ...
  • 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. ...