Muhd Hafizi Idris
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Preferred name
Muhd Hafizi Idris
Official Name
Muhd Hafizi, Idris
Alternative Name
Idris, Muhd Hafizi
Bin Idris, Muhd Hafizi
Idris, M. H.
Idris, Mohd Hafizi
Hafizi, Muhd
Hafizi Idris, Muhd
Main Affiliation
Scopus Author ID
55336452900
Researcher ID
E-5413-2011

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  • Publication
    Back flashover voltage on transmission tower of 275 KV extra high voltage line (case study: Galang-Binjai)
    (Iran University of Science and Technology, 2025-06)
    Muhd Hafizi Idris
    ;
    Muzamir Isa
    ;
    Ferry R. A. Bukit
    ;
    Surya Hardi
    ;
    Riza R. Wirasari
    Overvoltage at the insulator terminal caused by a lightning strike can occur in two ways, i.e., a direct lightning strike on the phase line and ground wire. The insulator can be exposed to the phenomenon of back flashover (BFO) if the terminal voltage of the insulator is higher than its insulator critical voltage The lightning current characteristics are distinguished by the maximum current and the steepness. Differences in the characteristics in this study are identified as International Electrical Commission (IEC) and Conseil International des Grands Reseaux Electriques (CIGRE) impulse waveform standards. The footing-tower grounding system comes in different configurations, such as horizontal, vertical, and grid. Alternative transient program (ATP) software was used for simulating lightning strikes on ground wire and phase lines. The results exhibit that the highest critical voltage of the insulators on the footing tower through grid grounding when the surge current strikes ground wire (3308kV – 3395 kV), with the magnitude of the lightning current ranging from (48 kA – 3395 kA). For lightning direct stroke on the phase line, the critical voltage on vertical grounding is highest on (2938 kV-3021 kV). The surge current flow footing-tower is highest on the grid. The currents magnitude flow in footing tower were influenced by impedance of grounding.
  • Publication
    Effect of distributed generation to the faults in medium voltage network using ATP-EMTP simulation
    ( 2021-01-01)
    Wan Syaza Ainaa Wan Salman
    ;
    Mohd Rafi Adzman
    ;
    Muzamir Isa
    ;
    Nur Syazlin Bakhtiar Jamili
    ;
    Muhd Hafizi Idris
    ;
    Melaty binti Amirruddin
    During past few years, distributed generation (DG) technology has been widely known in the industry as it can helps in providing backup power during high power demand. However, adding a new system may changes the traditional power system that are usually work in one direction which is from the generation to the consumer. When DG is added, the power flows from two direction. Therefore, a short circuit study was done to study the effects of DG to the local system during fault. An IEC Standard was also calculated as guidance to determine the thermally permissible of a cable.
      3  4
  • Publication
    Arcing fault diagnosis using first peak arrival of EM radiation signal
    ( 2021-06-11)
    Melaty binti Amirruddin
    ;
    Mohd Rafi Adzman
    ;
    Nur Adyani Mohd Affendi
    ;
    Azralmukmin Azmi
    ;
    Muhd Hafizi Idris
    ;
    Hana Abdull Halim
    ;
    Muzamir Isa
    ;
    Halim S.A.
    The objective of this study was to diagnose the arcing fault signals based on the first peak of arrival method using antenna to assess its use as potential arcing fault detection in power system network. Square patch antenna and circle patch antenna were employed for detection on artificial arcing in real environment. First peak of arcing signal arrival was measured through an analysis over a range of time and amplitude signals detected. For accurate results, Discrete Wavelet Transform (DWT) denoising technique was applied to the arcing signals detected as denoising tools. Analysis of first peak of signal arrival time and amplitude were carried out using MATLAB software to measure the changes in signals detected caused by di different placements of antenna. The results revealed that the first peak of signal arrival time, amplitude, type of antenna used and placement of the antenna around arcing source point all reflect the signals measurement.
      1  44