Noor Hasnizam Hanafi
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Noor Hasnizam Hanafi
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Noor Hasnizam, Hanafi
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Hanafi, Noor Hasnizam
Hanafi, N. H.
Hasnizam Hanafi, Noor
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Scopus Author ID
57188732121

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  • Publication
    Investigation of Spherical Electrode Grounding System under High Impulse Conditions with Different Polarities
    ( 2021-06-11)
    Haziah Abdul Hamid
    ;
    Mohd Rafi Adzman
    ;
    Noor Hasnizam Hanafi
    ;
    Nor N.M.
    ;
    Abdullah S.
    ;
    Reffin M.S.
    ;
    Etobi N.A.
    ;
    Abd-Rahman R.
    There have been many studies in the pasts, which showed that under high impulse conditions, soil ionization process around the electrode would occur, which results in lower resistance and lower transient voltage on the electrode. Several factors have also been found to affect the ionization process in soil such as; soil types and its grain sizes, moisture contents in the soil, earth electrode configurations, impulse polarity, the location of the injection point, the shape of response time, etc. In this paper, spherical electrodes grounding is used to study the ionization process in the grounding system under different impulse polarity of the current. The experiment was done by field measurement using a commercially available impulse current generator. It was found that lower earth resistance was seen to decrease with increasing current magnitudes for both impulse polarities. In addition, it was found that at low impulse current with negative polarity has a higher resistance than that of positive polarity. This paper is, therefore, to investigate towards improvement on grounding electrode's design, which would consider soil ionization process
      3  3
  • Publication
    The study of photovoltaic systems performance using various azimuth angles and solar array tilt positions
    ( 2020-01-07)
    Banu Poobalan
    ;
    Haziah Abdul Hamid
    ;
    Noor Hasnizam Hanafi
    ;
    Wooi Chin Leong
    The study of photovoltaic energy and load predictions have become essential with the increase of energy demand. The objective of this paper is to present an analytical study on the performance of photovoltaic system with various azimuth angles and solar array tilt positions. The output power of a solar module is mainly dependent on its tilt position, solar irradiation, type of solar cell, and the technical properties of the module. The data used in this work consist of two different locations. The outcome of this work shows that the energy production influenced heavily on the weather conditions, location, azimuth angles and tilt positions. Within this work, parameters such as planes-of-array irradiance, net to inverter output power, net to grid output power and performance ratio have been studied. The developed analytical study is anticipated to provide a better understanding on the energy production and load usage in accordance with suitable tilt angle of solar array in a specific location.
      1