PROFILE
Laman Web Staf UPM
PROF. MADYA DR. NORHAFIZ BIN AZIS
KETUA JABATAN
JABATAN KEJURUTERAAN ELEKTRIK DAN ELEKTRONIK
norhafiz@upm.edu.my
PROFESIONAL
NAMA :
(Prof. Madya Dr.) NORHAFIZ BIN AZIS
JAWATAN PENTADBIRAN :
KETUA JABATAN
ENTITI :
JABATAN KEJURUTERAAN ELEKTRIK DAN ELEKTRONIK
JAWATAN HAKIKI :
PROFESOR MADYA
ENTITI :
FAKULTI KEJURUTERAAN
BIDANG PENYELIAAN
COMPUTATIONAL METHODS IN ENGINEERING / ELECTRICAL POWER ENGINEERING / ENERGY / GEOGRAPHIC INFORMATION SYSTEM / MATERIALS ENGINEERING
PENERBITAN
2025
Acoustic Partial Discharge Localization in Refined, Bleached and Deodorized Palm Oil (RBDPO) based on the Savitzky-Golay and Moving Average Denoising Methods
2025
Broken rotor bar detection of three phase induction motor using frequency response analysis
2025
Prerequisites for Accelerated Aging of Transformer Oil: A Review
2025
Investigation of Partial Discharge Characteristics in Mineral Oil Induced by Dibenzyl Disulfide
2025
Acoustic Emission Partial Discharge Localization in Oil Based on Artificial Bee Colony
2024
Loss-of-Life Analyses Based on Modified Arrhenius and Relative Aging Rate for Non-Thermally Upgraded Paper in Oil-Immersed Transformer
2024
Structural Deformation and Displacement of a Disc Winding due to Standard Switching Impulse Voltage via Finite Element Method
2024
Impact of low molecular weight acid and moisture on the thermal ageing properties of palm oil
2023
Electromagnetic force distribution computations due to switching surge in disc-type winding
2023
Application of ANFIS and ANN for Partial Discharge Localization in Oil Through Acoustic Emission
2023
Short-term Ageing Study on the Palm Oil and Mineral Oil in the Presence of Insulation Paper, Moisture, Low Molecular Weight Acid, and Oxygen
2023
Nanoparticle Effects on the Electrical and Thermal Performance of the Transformer Mineral Oil
2023
The Influence of Cavity Size and Location Within Insulation Paper on the Partial Discharge Activities
2023
Physical and Electrical Breakdown Characteristics of Oil- Impregnated Kenaf Paper with the Introduction of External PVA for Transformer Application
2023
The effect of thermal stress and materials towards stray gassing formation in uninhibited and inhibited oil
2023
Examination of the Partial Discharge Behaviour Within a Spherical Cavity in Insulation Paper of Transformer
2023
Surfactants Effects on Enhancing Electrical Performance of Nanoparticle-Based Mineral Transformer Oil
2022
Classification of Fault and Stray Gassing in Transformer by Using Duval Pentagon and Machine Learning Algorithms
2022
Investigation of the impact of a standard lightning impulse on the structure of an 11/0.415 kV distribution transformer
2022
Paper Lifetime Mathematical Modelling based on Multi Pre-Exponential Factors for Oil-Immersed Transformer
2022
Partial Discharge Localization in Oil Through Acoustic Emission Technique Utilizing Fuzzy Logic
2021
Application of Statistical Distribution Models to Predict Health Index for Condition-Based Management of Transformers
2021
Experimental Study on the Partial Discharge Characteristics of Palm Oil and Coconut Oil based Al2O3 Nanofluids in the Presence of Sodium Dodecyl Sulfate
2021
Statistical Analysis of AC Dielectric Strength for Palm Oil under the Influence of Moisture
2021
Failure Rate Estimation for Transformer Population based on Health Index through Markov Model Approach
2021
Nanoparticles Application in High Voltage Insulation Systems
2020
Effect of Surfactants on the Lightning Breakdown Voltage of Palm Oil and Coconut Oil based Al2O3 Nanofluids
2020
Frequency response analysis technique for induction motor short circuit faults detection
2020
Extraction of Winding Parameters for 33/11 kV, 30 MVA Transformer Based on Finite Element Method for Frequency Response Modelling
2020
Effect of Shield Placement for Transient Voltage Mitigation due to Switching Surges in a 33/11 kV Transformer Windings
2020
Investigation of Kenaf Paper in the Presence of PVA for Transformers Application
2020
Phase to phase fault detection of 3-phase induction motor using FRA technique
2020
Examination on the Physical Properties of Untreated Kenaf Insulation Paper at Different Beating Degrees
2020
Pre-breakdown Streamer Propagation and Positive Lightning Breakdown Characteristics of Palm Oil Impregnated Aged Pressboard
2019
Impact of Fe3O4, CuO and Al2O3 on the AC Breakdown Voltage of Palm Oil and Coconut Oil in the Presence of CTAB
2019
Investigation on the Resonant Oscillations in an 11kV Distribution Transformer under Standard and Chopped Lightning Impulse Overvoltages with Different Configurations of Shield Placements
2019
Frequency response of transformer winding to investigate the influence of RLC
2018
Physiochemical and Electrical Properties of Refined, Bleached and Deodorized Palm Oil under High Temperature Ageing for Application in Transformers
2018
Investigation on the Effect of Winding Clamping Structure on Frequency Response Signature of 11 kV Distribution Transformer
2018
Ageing Study of Palm Oil and Coconut Oil in the Presence of Insulation Paper for Transformers Application
2018
A Maintenance Cost Study of Transformers based on Markov Model Utilizing Frequency of Transition Approach
2018
Effect of Pre-Determined Maintenance Repair Rates on the Health Index State Distribution and Performance Condition Curve Based on Markov Prediction Model for Sustainable Transformers Asset Management Strategies
2018
Application of Markov Model to Estimate Individual Condition Parameters for Transformers
2018
Pre-breakdown streamer propagation and breakdown characteristics of refined bleached and deodorized palm oil under lightning impulse voltage
2018
Transformers Health Index Assessment Based on Neural-Fuzzy Network
2017
Automated positioning dual-axis solar tracking system with precision elevation and azimuth angle control
2017
Estimation of Transformers Health Index Based on the Markov Chain
2017
Top-oil Temperature Model for Transformers based on Nonlinear Thermal Resistance, Lumped Capacitance and Thermal-electrical Analogy
2017
Automated positioning dual-axis solar tracking system with precision elevation and azimuth angle control
2017
Lightning Breakdown Voltages of Refined Bleached and Deodorised Palm Oil under Needle-plane Configuration
2017
A Simplified Top-Oil Temperature Model for Transformers Based on Pathway of Energy Transfer Concept and Thermal-Electrical Analogy
2016
The effect of polarity on the lightning breakdown voltages of palm oil and coconut oil under a non-uniform field for transformers application
2016
Investigation on the Dielectric, Physical and Chemical Properties of Palm Oil and Coconut Oil under Open Thermal Ageing Condition
2016
Evaluation on the Lightning Breakdown Voltages of Palm Oil and Coconut Oil under Non-Uniform Field at Small Gap Distances
2014
Ageing Assessment of Transformer Paper Insulation through Post Mortem Analysis
2014
Suitability of Palm Based Oil as Dielectric Insulating Fluid in Transformers