Haziah Abdul Hamid
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Preferred name
Haziah Abdul Hamid
Official Name
Abdul Hamid, Haziah
Alternative Name
Hamid, Haziah
Hamid, H.
Hamid, H. A
Abdul Hamid, H.
Hamid, Haziah Abdul
Hamid, Haziah Binti Abd
Main Affiliation
Scopus Author ID
57213599593
Researcher ID
HLX-4281-2023

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Two-terminal fault detection and location for hybrid transmission circuit

2021-08-01 , Muhd Hafizi Idris , Mohd Rafi Adzman , Mokhlis H. , Mohammad Faridun Naim Tajuddin , Haziah Abdul Hamid , Melaty Amirruddin

This paper presents the algorithms developed to detect and locate the faults at a hybrid circuit. First, the fault detection algorithm was developed using the comparison of total positive-sequence fault current between pre-fault and fault times to detect the occurrence of a fault. Then, the voltage check method was used to decide whether the fault occurred at overhead line (OHL) or cable section. Finally, the fault location algorithm using the impedance-based method and negative-sequence measurements from both terminals of the circuit were used to estimate the fault point from local terminal. From the tests of various fault conditions including different fault types, fault resistance and fault locations, the proposed method successfully detected all fault cases at around 1 cycle from fault initiation and with correct faulted section identification. Besides that, the fault location algorithm also has very accurate results of fault estimation with average error less than 1 km and 1%.

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Publication

Development and Performance Analysis of the Rogowski coil sensor for Arcing Fault Measurement

2020-03-20 , Ayob Nazmy Nanyan , Muzamir Isa , Mohamad Nur Khairul Hafizi Rohani , Haziah Abdul Hamid , Afifah Shuhada Rosmi , Mardianaliza Othman , Ahmad Zaidi Abdullah , Zamri Che Mat Kasa , Ami Nurul Nazifah Abdullah

Arcing fault is an overvoltage that usually occurs in the power system network, and it is necessary to monitor this phenomenon in electrical equipment. This paper presents the Rogowski coil (RC) as an arcing fault sensor. Finite element method (FEM) software used for analysing the RC magnetic flux density with two types of RC with the different turns and size demonstrated. The sizing of RC based on the 240 mm2 cross-link polyethene (XLPE) 11 kV underground cable. The prototypes of the RC sensors were designed using Solidworks software and three-dimensional (3D) printer for fabrication purposes. The main objective of the experiment is to investigate the RC effect with high magnetic flux density by implementing in real measurement. An experimental setup for real arcing fault with various voltages (up to 15 kV) was conducted to verify the RC performance, such as sensitivity and bandwidth range. The result has shown that the bandwidth of RC 1 is higher than RC 2 in all measurement by 22.6%.

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Finite Element Analysis of Electric Field Distribution in C4F7N as an Alternative to SF6 for Electrical Insulation

2021-01-01 , Ahmad R. , Rahman R.A. , Salem A.A. , Jamail N.A.M. , Rahman A.A. , Haziah Abdul Hamid

This research work examines the effect of the electric field in C4F7N for different configurations of electrodes and applied voltages. The behavior of the insulation medium is better understood by its electric field analysis. Sphere-sphere and plate-plate electrode configurations are analyzed with varying gap distances. A thorough electric field strength distribution analysis was carried out in a simulation tool based on the finite element method. The electric field strength is firmly dependent on the air gap between the electrodes and applied voltages. The electrodes configuration also affects the electric field and hence the breakdown strength of insulation gas.

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Differential equation fault location algorithm with harmonic effects in power system

2023-06-01 , Amin I.M. , Mohd Rafi Adzman , Haziah Abdul Hamid , Muhd Hafizi Idris , Melaty binti Amirruddin , Aliman O.

About 80% of faults in the power system distribution are earth faults. Studies to find effective methods to identify and locate faults in distribution networks are still relevant, in addition to the presence of harmonic signals that distort waves and create deviations in the power system that can cause many problems to the protection relay. This study focuses on a single line-to-ground (SLG) fault location algorithm in a power system distribution network based on fundamental frequency measured using the differential equation method. The developed algorithm considers the presence of harmonics components in the simulation network. In this study, several filters were tested to obtain the lowest fault location error to reduce the effect of harmonic components on the developed fault location algorithm. The network model is simulated using the alternate transients program (ATP)Draw simulation program. Several fault scenarios have been implemented during the simulation, such as fault resistance, fault distance, and fault inception angle. The final results show that the proposed algorithm can estimate the fault distance successfully with an acceptable fault location error. Based on the simulation results, the differential equation continuous wavelet technique (CWT) filter-based algorithm produced an accurate fault location result with a mean average error (MAE) of less than 5%.

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