Ismail Daut
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Ismail Daut
Official Name
Ismail, Daut
Alternative Name
Daut, I.
Ismail, D.
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Scopus Author ID
24733761500

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  • Publication
    An analysis on power quality measurement and monitoring techniques for nonlinear load
    (Universiti Malaysia Perlis (UniMAP), 2008-03-15)
    Shahrul Ashikin Azmi
    ;
    Mohd Rafi Adzman
    ;
    Mohd Fayzul Mohammed
    ;
    Siti Rafidah Abdul Rahim
    ;
    Zainuddin Mat Isa
    ;
    Ismail Daut
    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 especially in a deregulated electricity market. In the paper, the types of power quality variation are described and the method of characterizing each type with measurements are presented. By using the advances of power quality monitoring equipment and tools, analysis on power quality measurement result are described. The increased amount af data being collected requires more advanced analysis tools. power quality monitoring has advanced from strictly problem solving to ongoing monitoring of system performance.
  • Publication
    A study on voltage sag in industry system with adjustable speed drive
    (Universiti Malaysia Perlis (UniMAP), 2008-03-15)
    Syahrul Ashikin Azmi
    ;
    Mohd Fayzul Mohammed
    ;
    Siti Rafidah Abdul Rahim
    ;
    Mohd Rafi Adzman
    ;
    Zainuddin Mat Isa
    ;
    Ismail Daut
    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 produce an important effect on the behavior of adjustable speed drives (ASD's). Tripping of ASD is one of the greatest voltage sag problem, causing motor to stop with the resulting loss of time and production, or damaged equipment may cause significant economical loses. This paper is focused on the effect of voltage sags on adjustable speed drive (ASD) which commonly used in industry system. Voltage sags are normally used described by magnitude variation and unbalanced (asymmetry). These factors are important to determine the behavior of ac motor drive during sags. A VSI (Voltage Source Inverter) driving a three-phase induction motor is analyzed through digital simulation. Simulation on sag depth and three types of voltage sags which are based on voltage sag classification, with an emphasis on the changes dc bridge voltage, rms inverter voltage and motor speed were done. Thus, voltages and speed measurement are obtained. Simulation result clearly show that the different types of sags and sag depth would cause dc-link voltage variation and finally result in motor speed changes.