Browsing by Author "Mohd Rafi, Adzman"

Now showing items 1-14 of 14

    • An analysis on power quality measurement and monitoring techniques for nonlinear load 

      Shahrul Ashikin, Azmi; Mohd Rafi, Adzman; Mohd Fayzul, Mohammed; Siti Rafidah, Abdul Rahim; Zainuddin, Mat Isa; Ismail, Daut, Prof. Dr. (Universiti Malaysia Perlis (UniMAP), 2008-03-15)
      Electric power quality is an aspect of power engineering that has been with us since the inception of power systems. The measurement of the quality of the electric power in a network is therefore becoming an urging need ...

    • Computer designed solar concentrator 

      Omar, Aliman; Ismail, Daut; Muzamir, Isa; Mohd Rafi, Adzman (International Association of Science and Technology for Development (IASTED)/ACTA Press, 2007)
      This paper discusses a computer designed optical concentrator, which is providing efficient solar energy transfer to a Stirling Engine. The receiver can make line focusing onto the absorber of Stirling engine located at ...

    • Design and simulation of impluse voltage generator 

      M., Jayaraju; Mohd Rafi, Adzman; Noor Hasnizam, Hanafi; Mohammad Faridun Naim, Tajuddin; Siti Rafidah, Abdul Rahim; Syahrul Ashikin, Azmi (Malaysian Technical Universities Network (MTUN), 2009-06-20)
      Simulink, an extension of MATLAB is specially designed for simulating dynamic systems. This paper describes a method of modelling impluse voltage generator using Simulink. The equations for modelling have been developed ...

    • Design and simulation of impulse voltage generator 

      M., Jayaraju; Mohd Rafi, Adzman; Mohd Faridun Naim, Tajuddin; Siti Rafidah, Abdul Rahim; Syahrul Ashikin, Azmi (Universiti Malaysia Pahang (UMP), 2009-06-20)
      Simulink, an extension of MATLAB is specifically designed for simulating dynamic systems. This paper describes a method of modelling impulse voltage generator using Simulink. The equations for modelling have been developed ...

    • Diagnosis of MV oil filled cable terminations with X-ray imaging and infrared (IR) thermography 

      Mohd Rafi, Adzman; Ismail, Daut, Prof. Dr.; Muzamir, Isa; Baharuddin, Ismail; Omar, Aliman; Lehtonen, Matti; Hyvonen, Petri (Science Publications, 2007)
      A main purpose of doing a diagnostic in cable system including its accessories such as impregnated paper insulated oil filled cable termination is to predict failure before they occur. Those cable and accessories, which ...

    • Diagnostics of Oil Filled Cable Terminations 

      Mohd Rafi, Adzman; Muzamir, Isa; Baharuddin, Ismail; Lehtonen, Matti; Hyvonen, Petri (Kolej Universiti Kejuruteraan Utara Malaysia, 2006)
      Cable termination is one of the important components in the electrical power system. A failure of it can cause a long interruption, costly repair and loss of revenue. An existing oil filled cable termination such as rubber ...

    • An earth fault location scheme for isolated and compensated neutral distribution systems 

      Mohd Rafi, Adzman; Topolánek, David; Lehtonen, Matti I.; Toman, Petr (Praise Worthy Prize S.r.l., 2013-10)
      This paper proposes a scheme to locate an earth fault in an unearthed or a compensated neutral medium voltage (MV) network using the transient signal recorded from MV/LV substations. The algorithm applies continuous wavelet ...

    • EG allocation and sizing using real coded genetic algorithm method to minimize losses and improve voltage profile 

      Mohd Herwan, Sulaiman; Omar, Aliman; Siti Rafidah, Abdul Rahim; Mohd Rafi, Adzman (Universiti Teknikal Malaysia Melaka (UTeM), 2010-02-18)
      This paper propose a new methodology using Real Coded Genetic Algorithm (RCGA)for the optimal allocation and sizing of Embedded Generation (EG) to minimize the total power losses and to improve voltage profile in the radial ...

    • Generation of Digital Pulse Width Modulation (DPWM) with TMS320F2812 Digital Signal Processor 

      Mohd Faridun Naim, Tajuddin; M. S., Azizan; Mohd Fayzul, Mohammed; Baharuddin, Ismail; Siti Rafidah, Abdul Rahim; Mohd Rafi, Adzman; Zainuddin, Mat Isa; Syahrul Ashikin, Azmi; Ismail, Daut (Universiti Malaysia Pahang (UMP), 2009-06-20)
      This paper presents the programming and use of TMS320F2812 Digital Signal Processor (DSP) in generating the Digital Pulse Width Modulation (DPWM). The structure and functions of eZdsp 2812 board used in this project is ...

    • Merekabentuk Pengesan Discas Permukaan di dalam "Inclined-Plane Test" dengan menggunakan kaedah optik 

      Muzamir, Isa; Baharuddin, Ismail; Ismail, Daut; Che mat, Hadzer; Faizah, Abu Bakar; Mohd Rafi, Adzman (Universiti Malaysia Perlis, 2007)
      Laporan ini bertujuan untuk memberikan seberapa maklumat tentang ciri-ciri aktiviti discas permukaan secara langsung dan aktiviti discas separa umumnya serta peringkat-peringkat proses merekabentuk alat pengesan terhadap ...

    • A method for ground fault distance computation in unearthed medium voltage distribution network 

      Mohd Rafi, Adzman; Lehtonen, Matti (Praise Worthy Prize S.r.l., 2012)
      In networks with unearthed or compensated neutral, earth fault signals consist of different frequency components, which result from charging and discharging of the network capacitances. The charge transient which usually ...

    • Simplification of sun tracking mode to gain high concentration solar energy 

      Omar, Aliman; Ismail, Daut; Muzamir, Isa; Mohd Rafi, Adzman (Science Publications, 2007)
      Power conversion from solar thermal energy to electrical energy is still very cost-intensive. Serious effort has to be given in the development of the concentrator or heliostat structure expenditure which contributing the ...

    • A study on voltage sag in industry system with adjustable speed drive 

      Syahrul Ashikin, Azmi; Mohd Fayzul, Mohammed; Siti Rafidah, Abdul Rahim; Mohd Rafi, Adzman; Zainuddin, Mat Isa; Ismail, Daut, Prof. Dr. (Universiti Malaysia Perlis (UniMAP), 2008-03-15)
      The awareness of electric power quality has increased over the past decade as electronic equipment has become more susceptible to power disturbances. The most distruptive power disturbances is voltage sags. Voltage sags ...

    • Tracking error analysis of a rotation-elevation mode heliostat 

      Omar, Aliman; Ismail, Daut; Muzamir, Isa; Mohd Rafi, Adzman (Science Publications, 2007)
      For the past few years, great efforts have been done in improving the tracking accuracy of a newly proposed rotation-elevation tracking mode heliostat. A special simulation program has been developed to systematically ...