Wooi Chin Leong
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Wooi Chin Leong
Official Name
Leong, Wooi Chin
Alternative Name
Wooi, Chin-Leong
Wooi, C. L.
Wooi, Chin-leong
Main Affiliation
Scopus Author ID
55912811600
Researcher ID
V-2268-2019

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  • Publication
    Analysis on Behavior Grounding Electrode Resistance base on Profiling Method
    ( 2020-07-09)
    Hashim N.H.
    ;
    Syahrun Nizam Md Arshad @ Hashim
    ;
    Halim N.H.
    ;
    Wooi Chin Leong
    ;
    Ariffen A.M.
    ;
    Anuar A.
    ;
    Aqilah Sofiyah Hasni N.
    ;
    Abu Bakar O.
    An earthing system or known as grounding system in an electrical installation where by the grounding system connects specific parts of that installation with the Earth's conductive surface for safety and functional purposes. It is the process of transferring the immediate discharge with the aid of the low resistance wire of the electrical energy directly to the earth. It is really an important role playing in electrical system part as grounding system give protection during fault or lightning occur. In addition, grounding system also give protection for human electrical appliance and building from electrical shocks due to electrical fault or lighting occur. In this research will shows that to identify the best location to install the grounding electrode. This method is used on 10 x 10 meters which is 121 point will be investigated. The result of 0.3m, 0.6m, and 0.9m were analyzed using MATLAB software to produce profiling and shows the perfect location to install the Grounding system electrode.
  • Publication
    Effect of concrete orientation as an enhancement material in grounding system
    ( 2020-07-09)
    Hasni N.A.S.
    ;
    Syahrun Nizam Md Arshad @ Hashim
    ;
    Amizah Md. Ariffen
    ;
    Halim N.H.
    ;
    Wooi Chin Leong
    ;
    Muhammad Izuan Fahmi Romli
    ;
    Bakar O.A.
    To achieve an excellent grounding system, an alternative solution was developed by using enhancement material to modify the soil surrounding the rod. These materials can effectively reduce soil resistivity and grounding resistance for a better grounding system. To achieve this goal, the fundamental part must be taken into account. In this study, the main objective is to analyze different concrete orientations as enhancement material in the grounding system. A 3-D orientation of concrete has been designed using Finite Element Method (FEM) software to analyze the performance of the electric field in the grounding system with different orientation of concrete. Every orientation of concrete had been clarified into four different cases which are full concrete, half concrete, three-quarter concrete, and a quarter concrete. From the result, full concrete is the best orientation of concrete design to be employed at the grounding site as it has a low electric field compared to the other concrete orientation.
  • Publication
    Feasibility, sizing and economic analysis of solar energy system for green Swinburne campus
    (Institute of Electrical and Electronics Engineers (IEEE), 2020)
    Mohamed Ashfaaq Riphque
    ;
    Hadi Nabipour-Afrouzi
    ;
    Wooi Chin Leong
    ;
    SanChuin Liew
    ;
    Kamyar Mehranzamir
    ;
    Jubaer Ahmed
    In 2011 alone, Malaysia has spent a hefty RM14.5 billion in buying fossil fuels to generate electricity. With the cost of fossil fuels rising each year, the nation is looking to rely on more sustainable energy sources. One way to decrease the reliance on fossil fuel is to minimize electricity consumption or use renewable energy sources. This research tests if it is feasible to run the Swinburne campus with Solar photovoltaic (PV) cells. This study aims to design and implement a PV energy system to power Swinburne University of Technology Sarawak. The design of the PV system is performed with the collection of the solar irradiance in Kuching, load profile of the Campus and the area required to layout the panels. Block-E of Swinburne is chosen for the PV system since all Swinburne blocks together consume very high power and do not have the required area for the panels. A Grid-Tied system is considered for the PV design. MATLAB software is used to size the PV system. Economic analysis such as Levelized Cost of Energy (LCOE), Life Cycle Cost Analysis (LCCA) and payback period is studied for the PV system.
  • Publication
    Motivational game-theory P2P energy trading: a case study in Malaysia
    (IEEE, 2020)
    Yu Hang Yap
    ;
    Jinnie
    ;
    Tan, Wen-Shan
    ;
    Yuan-Kang Wooi
    ;
    Wooi Chin Leong
    ;
    Noor Azlinda Ahmad
    Peer-to-peer (P2P) energy trading allows surplus energy to be traded between distributed energy resources (DER) and prosumers in the community microgrid. In Malaysia, P2P energy trading is still under development, where it is expected to be exclusively participated by commercial and industrial prosumers. This paper proposes how a motivational psychology framework can be used effectively to design P2P energy trading to increase user participation for residential prosumer. All the data such as power consumption and solar energy value are adjusted and modelled in such a way to facilitate the calculation of P2P energy trading in Malaysia. An auction-based P2P market clearing model is then proposed and solved by using the Linear Programming optimization approach. The numerical results show the sustainability and the potential of the proposed P2P energy trading model to attract residential customers to participate in energy trading.
  • Publication
    Overview of distribution system reliability optimization against lightning
    (Semarak Ilmu Publishing, 2025-01)
    Wooi Chin Leong
    The reliability of the distribution system relies on the occurrence of lightning phenomena, which can significantly affect the distribution of electricity and result in power service disruptions. Therefore, ensuring the reliability of the distribution system is an ongoing challenge that necessitates continuous research for optimal solutions. Researchers have always developed solutions that are always up to date by leveraging advancements in mathematics, engineering technology, and management strategies. This paper presents a comprehensive summary and discussion of various optimization models for enhancing system reliability. It offers an overview of commonly employed mathematical programming techniques and algorithms for Lightning Protection Systems (LPSs), while also highlighting the influence of lightning phenomena on these solutions. The focus of this paper is to present the engineering aspects behind the development of modern LPSs. It encompasses historical reliability data, technical limitations, and economic considerations. By utilizing operations research and optimization theory, researchers have been able to devise more effective approaches for addressing reliability issues, even in highly intricate systems across different domains. Technological advancements have prompted researchers to adopt a new perspective on solving reliability problems, based on practical engineering requirements. In conclusion, the continuous progress in mathematics, engineering technology, and management approaches has enabled researchers to tackle the challenges associated with distribution system reliability. This paper serves as a valuable resource, providing insights into the development of modern LPSs and offering guidance on optimizing system reliability in various practical engineering scenarios.
      1
  • Publication
    Simulation of reverse power relay in 11 kV generator protection
    ( 2021-05-03)
    Wooi Chin Leong
    ;
    Lee Y.Y.
    ;
    Nabipour-Afrouzi H.
    ;
    Mousa M.I.
    ;
    Syahrun Nizam Md Arshad @ Hashim
    ;
    Mehranzamir K.
    ;
    Mohamad Nur Khairul Hafizi Rohani
    This paper proposed the modelling and simulation of generator protection for power system using digital reverse power relay. The operations of the power plant are often interrupted by the reverse power generation. Therefore, generators need to be closely monitored and controlled. In this study, 11 kV synchronous generators are connected to 220 kV load through a step-up transformer, and a new model of reverse power relay is added for generator protection. The reverse power relay proposed in this paper is a digital relay with high accuracy and high reacting speed. Several cases based on various types of mechanical inputs to the generator were studied to test the operation of the reverse power relay. This simulation was done using MATLAB/Simulink. The results show that the 11 kV generator protection is successful with this new model reverse power relay. Besides, the simulation results were similar result compared to the theory result. From the simulation results, the integral output of the relay will reach the threshold value 'L' whenever there is a reversed power flow fault found in the system. Consequently, the relay will be triggered to provide protection for the generator. This model has been added into online resources of MATLAB Power System Tools. In addition, this model may also help the engineers to develop the analytical skills under various conditions.
      27  2
  • Publication
    High voltage Testing characteristics of kenaf as grounding enhancement material
    ( 2022-01-01)
    Bakar O.A.
    ;
    Syahrun Nizam Md Arshad @ Hashim
    ;
    Othman M.B.
    ;
    Wooi Chin Leong
    ;
    Adzis Z.
    Lightning protection elements consist of a grounding system. The grounding system's main task is to disburse the current into the earth safely. This research aims to lower the resistance, thus creating a good path for the grounding system using natural enhancement material as backfill material. Since the kenaf core is brittle, not dense and loose, therefore clay as a bonding agent is mixed as a backfill material. Various mixtures of clay and kenaf are filled in the acrylic box. The sample goes through the high voltage AC and DC levels until the sample breakdown reaches. The upper limit of voltage depends on the material and its condition, either dry or wet. The data records the temperature and relative humidity of the laboratory before running the testing. After every increment, high voltage AC will be applied constantly for ten seconds at the backfill material. The testing also observes any physical changes in the material. From HVAC and HVDC tests, kenaf shows high conductivity. The breakdown voltage considers higher when the percentage of kenaf mix is low. The results show that kenaf has high conductivity and is suitable for use as a natural enhancement material for grounding purposes.
      1  17
  • Publication
    Simulation of differential relay for transformer protection
    ( 2020-03-20)
    Azizan N.S.
    ;
    Wooi Chin Leong
    ;
    Baharuddin Ismail
    ;
    Syahrun Nizam Md Arshad @ Hashim
    ;
    Isa M.
    ;
    Wan Azani Wan Mustafa
    ;
    Rohani MNK
    In electric power system, transformers are an important element and their protection are critical. As the transformer might be damaged during a fault, faster and more selective protection was required. For this purpose, the design of differential protection was utilized. In this study, the differential relay simulation has been successfully done using MATLAB/Simulink. The essential approach is to protect the power transformer against internal faults and avoid interference in the power system. The evaluation has been accomplished at different fault conditions. Several types of faults including double line-to-ground, single line-to-ground and line-to-line faults are studied. Simulation studies were performed and the relays performance with different system parameters and conditions were investigated. The obtained results illustrated for the differential relay represents an appropriate action.
      3  27
  • Publication
    Analysis behavior of soil resistivity profiling base on UniMAP condition
    ( 2020-01-07)
    Syahrun Nizam Md Arshad @ Hashim
    ;
    Wahib A.H.
    ;
    Halim N.H.
    ;
    Yousof M.F.M.
    ;
    Ariffen A.M.
    ;
    Wooi Chin Leong
    ;
    Abd Rahman M.S.
    The main purpose of the earthing is to ensure that every electrical equipment, house and human are safe when lightning strikes. Lightning phenomenon occur scan produced high voltage and current ant it can caused electrical equipment damage and life danger. Therefore, this project will analyze the behavior of the soil. The main purpose of this project was to select the soil structure and the depth of the electrode suitable for grounding system in UniMAP. Additionally, this project will also analyze the soil resistance for grounding systems using MATLAB Software. From the result it can shows the best point for located grounding rod to ensure optimum grounding system.
      2  16
  • 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.
      3  26