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All Journal TELKOMNIKA (Telecommunication Computing Electronics and Control)
Omar Aliman
Universiti Malaysia Pahang
Computer Science & IT

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Kalman Filter Estimation of Impedance Parameters for Medium Transmission Line Siti Nur Aishah Mohd Amin; Hamzah Ahmad; Mohd Rusllim Mohamed; Mohd Mawardi Saari; Omar Aliman
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 16, No 2: April 2018
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v16i2.9026

Abstract

Accurate knowledge of impedance parameters in transmission line helps to improve the system efficiency and performance. Nowadays, the estimation of impedance parameters in transmission line has become possible with the availability of computational method. This paper aims to develop Kalman filter model by using Matlab simulink to estimate accurate values of resistance (R), reactance (X), and susceptance (B) in medium transmission line. The accuracy of the parameters can be improved by reducing the unknown errors in the system. To demonstrate the effectiveness of the Kalman filter method, a case study of simulated medium transmission line is presented and comparison between Kalman Filter (KF) and Linear Least Square (LLS) method is also considered to evaluate their performances.
Differential equation fault location algorithm with harmonic effects in power system Izatti Md. Amin; Mohd Rafi Adzman; Haziah Abdul Hamid; Muhd Hafizi Idris; Melaty Amirruddin; Omar Aliman
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 21, No 3: June 2023
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v21i3.22503

Abstract

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%.
Co-Authors Hamzah Ahmad Haziah Abdul Hamid Izatti Md. Amin Melaty Amirruddin Mohd Mawardi Saari Mohd Rafi Adzman Mohd Rusllim Mohamed Muhd Hafizi Idris Siti Nur Aishah Mohd Amin