Mohd Fayzul Mohammed
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Preferred name
Mohd Fayzul Mohammed
Official Name
Mohd Fayzul , Mohammed
Alternative Name
Mohammed, M. F.
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Scopus Author ID
36019265100
Researcher ID
GPW-9988-2022

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Now showing 1 - 8 of 8
  • Publication
    Fundamental study on the impacts of water-cooling and accumulated dust on photovoltaic module performance
    ( 2022-12-01)
    Alwesabi F.A.A.
    ;
    Aziz A.S.
    ;
    Mohamad Shukor Abdul Rahim
    ;
    Mohammad Faridun Naim Tajuddin
    ;
    Mohd Fayzul Mohammed
    ;
    Azralmukmin Azmi
    ;
    Satterlee C.
    ;
    Ayob S.M.
    ;
    Sutikno T.
    Photovoltaic (PV) modules have been becoming well-spread recently as alternative clean energy sources to traditional energy sources due to their efficiency and sustainability benefits. This paper applied various water temperatures and artificial dust levels to a couple of monocrystalline PV modules under outdoor conditions to observe their performance. Two different IV tracers were connected separately to each module for comparison purposes. Two temperature sensors were installed at the back of the panels to observe the cell temperatures. Besides, a temperature sensor was specified for ambient readings. Water flowed through an adjustable water-flow sensor to cool the overheated PV module using specific mass flow rates. The results indicate that the efficiency of the PV module starts to reduce when the panel temperature begins to surpass 49.1°C. It was discovered that cooling the PV module increases its efficiency from 0.97 percent at the lowest rate to 4.70 percent at the highest rate. Furthermore, accumulated dust on the PV module top surface can be reduced up to 3-fold under 110 g/m2 of dust, and up to 29.30% under 10 g/m2 of 100% of its generated energy. Improvement techniques and future work on PV module performance are also discussed.
  • Publication
    Hysteresis current control for single-phase transformerless inverter
    (Intelektual Pustaka Media Utama, 2025-03)
    Aina Suhailah Mohd Azhar
    ;
    Maaspaliza Azri
    ;
    Wahidah Abd Halim
    ;
    Md Hairul Nizam Talib
    ;
    Zulhani Rasin
    ;
    Mohd Fayzul Mohammed
    The total harmonic distortion (THD) of grid current and leakage current are significant for transformerless inverters, as they impact power quality, efficiency, and compliance with grid codes. Monitoring and minimizing these currents ensure safe and reliable grid integration of photovoltaic (PV) systems while reducing electromagnetic interference. Therefore, in this paper, the analysis THD of grid current and leakage current is described. The bipolar pulse width modulation (BPWM) technology provides a stable common-mode voltage (200 V), fewer leakage currents (< 30 mA), and better system efficiency, compared to the unipolar pulse width modulation (UPWM) technique. To ensure the inverter complies with the IEC 61000-3-2 class C (THDi < 5%), the current control strategy should be considered during the design of the transformerless inverter. Therefore, this paper presents an implementation and evaluation of the bipolar hysteresis current control (BHCC) technique. In comparison to the BPWM technique, the BHCC technique delivers lower leakage current (0.007274 A), reduced grid current harmonic distortion (1.81%), and increased efficiency.
  • Publication
    Effects of Appliances to Voltage, Current, Power Factor and Harmonic Distortion
    ( 2004)
    Mohd Fayzul Mohammed
    ;
    Baharuddin Ismail
    ;
    Ismail Daut
    ;
    Soib Taib
    ;
    Shuhaimi Zakaria
    ;
    Kamsani Abdul Majid
    Power utility always get blame if there are power interruption occurred in residential areas. Many of the residential customers are unaware, that is electrical appliance itself one of the reason that contribute to power quality problem. Effects of appliances a/so can harm other sensitive equipment as we/las electrical distribution system. This paper studies the effects of the appliances to power quality. Appliances that are used in the study are personal computer, fluorescent light, iron, LCD monitor, motor & driver, television, hand drill, laptop and jig saw. Waveform of the phase voltage and current, power components, and distortion of voltage and current for all appliances have been recorded and analyzed using Reliable Power Meter. In this paper concepts of power factor and effects of harmonics are reviewed. Subsequently voltage and current waveform, voltage total harmonic distortion, current total harmonic distortion and power factor are analyzed and discussed.
      4  13
  • Publication
    Optimal Allocation and Sizing of Multi DG Units including Different Load Model Using Evolutionary Programming
    ( 2021-06-11)
    Mohd Fayzul Mohammed
    ;
    Siti Rafidah Abdul Rahim
    ;
    Azralmukmin Azmi
    ;
    Wan Zulmajdi Wan Zanudin
    ;
    Muhamad Hatta Hussain
    ;
    Nurul Huda H.
    ;
    Aliman O.
    This paper presents the optimal allocation and sizing of multi distributed generation (DG) units including different load models using evolutionary programming (EP) in solving power system optimization problem. This paper also studies on the effect of multi DG placement in different load model. To optimize the power distribution system, multi DG units were used to reduce losses power distribution system. By using EP, the optimal allocation and sizing of multi-DG was determined in order to obtain maximum benefits from its installation. The propose technique was tested into IEEE 69-bus distribution system. The result shows the placement of DG can reduce power loss 89% to 98%. The placement of multi-DG unit has better performance compare to single DG.
      2  30
  • Publication
    Feasibility analysis of grid-connected and islanded operation of a solar PV microgrid system: A case study of Iraq
    ( 2020-01-15)
    Aziz A.S.
    ;
    Mohammad Faridun Naim Tajuddin
    ;
    Mohd Rafi Adzman
    ;
    Mohd Fayzul Mohammed
    ;
    Ramli M.A.M.
    Iraq has massive potential for electricity generation from solar energy. Because the country currently suffers from daily electricity shortages, a grid-connected PV system is an unsuitable option since the PV cannot serve the load during the electricity blackouts. This paper aims to analyze the techno-economic and environmental feasibility of a solar PV microgrid system which is able to supply the load during both grid availability and outage periods. A household in Baghdad was selected as a case study. HOMER software was used to carry out the overall analysis using five different control strategies. The results indicated that the most economical configuration was achieved by allowing the grid to charge the batteries at all rates, with a net present cost (NPC) of $29,713. A sustainability assessment revealed that preventing the grid from charging the battery resulted in the highest renewable fraction and the lowest CO2 emissions with 64.9% and 4533 kg/year, respectively. Furthermore, inserting a diesel generator to an economically optimized system was found to reduce the NPC by 11.6%, while increasing the CO2 emissions by 32.7%. This study showed that implementing this sort of project can provide clean, economical, and continuous electricity production in countries with daily blackouts.
      29  1
  • Publication
    Modeling, experimental investigation and real-time control of active water cooling system for photovoltaic module
    ( 2024-01-01)
    Mohamad Shukor Abdul Rahim
    ;
    Mohammad Faridun Naim Tajuddin
    ;
    Mohd Sazli Saad
    ;
    Hasanuzzaman M.
    ;
    Azralmukmin Azmi
    ;
    Mohd Fayzul Mohammed
    Photovoltaic (PV) cells are integral in harnessing solar energy, yet their performance is hindered by excessive heat generation, impacting efficiency and sustainability. Addressing the challenge of efficiency loss in photovoltaic (PV) cells due to overheating, this study focuses on optimizing active water cooling control for PV modules. The aim is to develop a dynamic, sustainable model and integrate a PID controller tuned by Sine Cosine Algorithm (SCA), targeting optimal operating temperatures. This study introduces a dynamic model and a closed-loop control system to manage PV cell temperature, investigating the correlation between water flow and temperature regulation. Experimental data is gathered using a pseudo-random binary sequence (PRBS) as an excitation signal, forming the foundation of an Auto Regressive eXogenous (ARX) model. The closed-loop system incorporates a PID controller and tuned using the Sine Cosine Algorithm (SCA) to optimize performance. The resulting model is rigorously validated through experimental investigation, demonstrating its precision in capturing the system’s dynamics. Moreover, the implementation of a controller-based cooling system substantiates the model’s practical efficacy. The research demonstrates significant improvements when implementing a controller-based water-cooling system for photovoltaic (PV) modules. Compared to the baseline scenario without cooling, the system achieves a 34.5% reduction in average PV temperature (from 59.2°C to 38.9°C) and a 9.46% increase in average power output (from 196.7W to 215.3W). Moreover, this system utilizes only 248.8 liters of water, marking a substantial 64% decrease in water consumption compared to traditional free-flow cooling methods, which use 790.9 liters. The research demonstrates that the controller-based cooling approach is a sustainable option, delivering power output comparable to the free-flow method, yet significantly lowering water consumption. This research signifies a turning point for sustainability, offering an efficient and water-conscious approach for enhancing PV system performance, a crucial step toward a greener and more environmentally responsible energy future.
      35  12
  • 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.