Mohd Firdaus Mohd Ab Halim

Technical University of Malaysia Malacca

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Khalil Azha Mohd Annuar

Technical University of Malaysia Malacca

Erwan Sulaiman

Tun Hussein Onn University of Malaysia

Mohamad Haniff Harun

Technical University of Malaysia Malacca

Radzali Othman

Technical University of Malaysia Malacca

Nik Azran Ab Hadi

Technical University of Malaysia Malacca

Amar Faiz Zainal Abidin

Technical University of Malaysia Malacca

Arman Hadi Azahar

Technical University of Malaysia Malacca

Azhan Ab Rahman

Technical University of Malaysia Malacca

Mohd Badril Nor Shah

Technical University of Malaysia Malacca

Mohd Shahrieel Mohd Aras

Technical University of Malaysia Malacca

Cooperative Institutions

Technical University of Malaysia Malacca

University of Technology Malaysia

National University of Malaysia

Universiti Teknologi MARA

Universiti Malaysia Perlis

Tun Hussein Onn University of Malaysia

University of Malaya

Universiti Sains Malaysia

Universiti Putra Malaysia

Hospital Universiti Sains Malaysia

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MONITORING GRID FREQUENCY

Mohd Firdaus Mohd Ab Halim Mohamad Haniff Harun Khalil Azha Mohd Annuar Suziana Ahmad

The grid frequency of a 50 Hz system varies from 49.8 Hz to 50.2 Hz. Every 0.01 Hz of change in grid frequency correspond to approximately 6% to 8% of power supply dropped in the grid (S. Pourmousavi et al. 2009). Hence high resolution of measurement device is a must to monitor the grid frequency. Most frequency measurement devices such as oscilloscope usually caters high frequency measurement range. Even though some oscilloscope able to measure low frequency signal, its accuracy and resolution is not up to the challenge of measuring grid frequency. Phasor Measurement Unit (PMU) uses by most power system company is not economical to be used by small scale power generation company or for research purpose. In this paper, a simple zero crossing method will be employ to measure the grid frequency with a resolution of 0.003 Hz using Arduino Uno controller. The test and validation of the frequency data took place in Europe specifically at University of Applied Science Rosenheim.

Phasor measurement unit

Frequency grid

Units of measurement

500 kHz

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Citations (1)

A NEW SPEED MULTIPLIER COAXIAL MAGNETIC GEAR

Progress In Electromagnetics Research M (2020)

Mohd Firdaus Mohd Ab Halim Erwan Sulaiman Raja Nor Firdaus Azhan Ab Rahman

Coaxial

Magnetic gear

10.2528/pierm20040103

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Citations (2)

An analysis of energy saving through delamping method

International Journal of Electrical and Computer Engineering (IJECE) (2019)

Mohd Firdaus Mohd Ab Halim Muhamad Faizal Yaakub Mohamad Haniff Harun Khalil Azha Mohd Annuar Farriz Hj Md Basar

Electrical energy consumption is one of the focus areas in Green and Sustainable technology in the 21st century. Many energy consultants offers services to reduce the electricity consumption to the commercial consumer. Many proposals are focusing on selling their energy management system product which cost a lot of initial investment. The problem of applying energy management system is that the building needs major renovation. In this paper, electricity consumption is reduced through delamping method. The delamping is strategizing based on energy efficiency audit. This technique complies with the ASHRAE international standard for office building. The number of light reduced and electricity consumption from this exercise can translate into reduction of maintenance and electricity bill. The comparison of payback period for various energy saving techniques were discussed as well.

ASHRAE 90.1

Payback period

Consumption

Investment

10.11591/ijece.v9i3.pp1569-1575

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Citations (7)

Lighting Retrofit Scheme Economic Evaluation

Indonesian Journal of Electrical Engineering and Computer Science (2017)

Mohd Firdaus Mohd Ab Halim Umar Al-Amani Azlan Mohamad Haniff Harun Khalil Azha Mohd Annuar Siti Halma Johari

In this paper, two lighting retrofit scheme is simulated to evaluate the amount of saving that the commercial building owner would benefits. Simple payback period and net present value are the method used to qualify the retrofit scheme to be profitable or otherwise. The analysis include the effect of electricity price, energy saving percentage, technology price and efficacy future values towards the economic return. The retrofit scheme presented only covers for the building that already has existing lighting equipment and comply towards the standard set by the international technical society. All variables and assumption are based on latest report by the world governing bodies and regulation.

Payback period

Value (mathematics)

10.11591/ijeecs.v5.i3.pp496-501

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Citations (6)

Medium Voltage Gas Insulated Ring Main Unit (RMU) Condition Assessment by Utilizing Health Index Monitoring Method in Malaysia Power Utility

Raja Saharuddin Raja Daud Muhammad Sharil Yahaya Hidayat Zainuddin Norhafiz Azis Z. Ibrahim

This paper proposes a comprehensive method to evaluate the condition of Gas Insulated Ring Main Unit (RMU) by using the conventional weight and scoring method cojoin with risk factor to improve the accuracy of the Health Index (HI) evaluation. Currently in Malaysia Power Utility implements Condition Based Monitoring (CBM) as a method to assess the condition of RMU. However, the CBM data captured never been integrated into HI method. Thus, overall health condition difficult to determine without overall overview of RMU condition. The HI evaluation proposed is utilizing CBM data being transformed to a numerical value in term of percentage according to respective compartment up to overall HI. The accuracy of the HI has been improved by applying risk factor which considers invisible aspect that can contribute to the changes of the index. In this paper, a condition evaluation method has been developed. Subsequently, the method has been developed to evaluate 200 numbers of 11kV distribution RMU. Recommendation of maintenance strategy has been developed as well based on HI result to optimize resources and cost management. Thus, this study contributes an overview and insight condition of RMU in indexing form and provide input for maintenance strategy plan or repair.

10.1109/icpea60617.2024.10498310

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PRIORITIZING SUSTAINABILITY IMPACT OF FAILURE MODE AND EFFECT ANALYSIS IN THE PALM OIL MILL USING ANALYTICAL HIERARCHY PROCESS

Journal of Physics Conference Series (2020)

Wan Hasrulnizzam Wan Mahmood Ilyana Abdullah Muhammad Hafidz Fazli Md Fauadi Mohd Nizam Ab Rahman Mohd Firdaus Mohd Ab Halim

Abstract This paper presents an Analytical Hierarchy Process (AHP) model for prioritizing multicriteria sustainability impact of Failure Mode and Effect Analysis (FMEA). It focuses on the Malaysian palm oil mills that have been widely criticized on various sustainability issues. The data collection for pair-wise comparison of decision judgement are taken from three experts of palm oil milling process and an additional expert from the academic background. The multi-criteria of each sustainability impacts (technical, economic, environmental, and social) are assessed for the weights of the occurrence, severity, and detection of the FMEA. The result of the study suggested that the degree of failure severity for social impact is considered as the highest priority for palm oil mills. This paper provides insights for management to improve organizations’ sustainability performance at the operational level by considering sustainability impact in analyzing failure mode and effect of equipment.

Judgement

10.1088/1742-6596/1529/4/042035

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Dynamic modelling and analysis of 3D overhead gantry crane system

International Journal of Engineering & Technology (2018)

Khalil Azha Mohd Annuar Nik Azran Ab Hadi Mohamad Haniff Harun Mohd Firdaus Mohd Ab Halim Siti Nur Suhaila Mirin

The overhead gantry crane systems are extensively used in harbours and factories for transportation of heavy loads. The crane speeding up, required for motion, always induces undesirable load swing. This writings present dynamic modelling of a 3D overhead gantry crane sys-tem based on closed-form equations of motion. By using the Lagrange technique, a 3D overhead gantry crane system nonlinear dynamic model is deriving. Then perform a linearization process to obtain a linear model dynamic system. Finally, simulation results systems re-sponses of the derived nonlinear and linear model are presented showing the accuracy and performance of both model.

Gantry crane

Overhead crane

Linearization

10.14419/ijet.v7i3.10099

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Citations (1)

Preliminary analysis of eddy current and iron loss in magnetic gear in electric vehicle

International Journal of Electrical and Computer Engineering (IJECE) (2022)

Mohd Firdaus Mohd Ab Halim Erwan Sulaiman Mahyuzie Jenal Radzali Othman Syammary Naufal

The inclusion of a high energy density permanent magnet into magnetic gear improves the machine's torque density. However, it also contributes to eddy current loss, especially in a high-speed application such in electric vehicle. In this paper, the losses from eddy current and iron loss are investigated on concentric magnetic gear (CMG). Torque multiplier (CMG) is designed with 8/3 gear ratio for this study. Iron loss and eddy current loss are compared and discussed. Based on this study, eddy current loss contributes to almost 96% of the total loss. This finding is hoped to direct the researcher to focus more on reducing loss associated with eddy current loss.

Torque density

Magnetic gear

Eddy current brake

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Gear efficiency estimation method through finite element and curve fitting

International Journal of Applied Electromagnetics and Mechanics (2021)

Mohd Firdaus Mohd Ab Halim Erwan Sulaiman Raja Nor Firdaus K. Raja Othman

The inclusion of high energy density permanent magnet (PM) in MG contributes to the high eddy current loss in magnetic gear and reduces its efficiency. There was limited research done that focused on gear efficiency behavior over a broader range of speed and in different gear ratios. In this paper, the function of gear efficiency concerning gear ratio and rotational speed is proposed. Torque and eddy current loss data were obtained through transient magnetic analysis using finite element software at several rotational ranges and gear ratios. The analytical approach through mathematical substitution was discussed to confirm the finding in the simulation. The result showed that the gear efficiency decreases as the speed increases. Nonetheless, the gear efficiency revealed improvement in efficiency as the gear ratio increases. Finally, gear efficiency behavior was modeled using the curve fitting method. Subsequently, based on the correlation study, an equation was proposed, yielding a 1% error compared to the new simulated data. With this proposed method and equation, the analysis and estimation of gear efficiency behavior over wider speed and gear ratios are simplified, thus reducing the need to perform simulation over different speeds and gear ratios.

Magnetic gear

Non-circular gear

Gear ratio

10.3233/jae-201576

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Citations (3)

Development of wireless and intelligent home automation system

TELKOMNIKA (Telecommunication Computing Electronics and Control) (2019)

Khalil Azha Mohd Annuar Muhammad Faiq Maharam Nik Azran Ab Hadi Mohamad Haniff Harun Mohd Firdaus Mohd Ab Halim

The Intelligent Home Automation System (IHAS) is usually a cell phone web-based application that enables end users in order to keep track of in addition to manage home/office appliance using their mobile system. The main objective of this system is developed to facilitate home users, especially domestic electrical appliances with simple controls. In addition, it can save the cost of electricity for lighting can be controlled to suit the user. Generally, most home appliances controlled from a distance using a remote control. Has created a system for controlling home lighting from a certain distance, which replaces the remote control using mobile smartphone. To make the smartphone to function as a remote control, an application was developed using Android technology. App Inventor software used for designing applications intended. Hardware microcontroller Arduino UNO R3 which is used to connect the smartphone to the electrical equipment. The system has been tested by developing a mini model and take into account the situation in the domestic home. The test is based on the level of control for wirelessly using Bluetooth and the distance between the lamp and the smartphone. The results of this test, the system can be used on equipment or other home appliances for the purpose of controlling or adjustment. In addition, the security system was also highlighted in a typical system, using the global system for mobile (GSM), it can be warned and notified to the consumer where there is a gas leak or the presence of a person in the vicinity of the residence.

GSM

Remote Control

Arduino

Mobile phone

Home Automation

Home security

10.12928/telkomnika.v17i1.9075

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Citations (8)