Shoyab Ali

Bio: Shoyab Ali is an academic researcher. The author has contributed to research in topics: Fault (power engineering) & Fault detection and isolation. The author has an hindex of 4, co-authored 11 publications receiving 51 citations.

Detection of Fault in Series Capacitor Compensated Double Circuit Transmission Line using Wavelet Transform

Abstract: This paper presents wavelet transform based fault detection scheme for the protection of series capacitor compensated double circuit transmission lines. Three phase current of both circuits measured at relay location are used for the detection of fault. Three phase current of both circuits are processed using Daubechies-4 mother wavelet up to level-1. Performance of wavelet transform is tested for inter-circuit faults, cross-country faults, faults at boundary locations, fault resistance variation, ground resistance variation, fault inception time variation and fault location variation. Accuracy of wavelet transform scheme is 100%.

Fault Detection on Series Capacitor Compensated Transmission Line using Walsh Hadamard Transform

Abstract: In this paper, a fault detection scheme for series capacitor compensated three phase transmission lines is proposed using fast Walsh hadamard transform. The proposed scheme uses only single end measured fault current data. The proposed scheme has been tested for numerous shunt faults with variation in different parameters like fault type, fault location, fault resistance, fault inception time and ground resistance. The simulation results authenticate the accuracy and effectiveness of proposed scheme.

Fault Detection in Wind Farm Integrated Series Capacitor Compensated Transmission Line Using Hilbert Huang Transform

Abstract: In this paper, a fault detection and faulty phase identification technique is proposed for the protection of series capacitor compensated three phase transmission line connected with wind energy source using Hilbert-huang transform. The proposed scheme makes use of single end measured fault current data. The proposed scheme has been tested for various cases of faults with varying different fault parameters like fault type, fault location, fault resistance, fault inception time and ground resistance. The test results validate the accuracy and usefulness of proposed scheme.

A Hybrid Marine Predator Sine Cosine Algorithm for Parameter Selection of Hybrid Active Power Filter

Abstract: Power quality issues are handled very well by filter technologies. In recent years, the advancement of hybrid active power filters (HAPF) has been enhanced due to ease of control and flexibility as compared to other filter technologies. These filters are a beneficial asset for a power producer that requires a smooth filtered output of power. However, the design of these filters is a daunting task to perform. Often, metaheuristic algorithms are employed for dealing with this nonlinear optimization problem. In this work, a new hybrid metaheuristic algorithm (Marine Predator Algorithm and Sine Cosine Algorithm) has been proposed for selecting the best parameters for HAPF. The comparison of different algorithms for obtaining the HAPF parameters is also performed to show case efficacy of the proposed hybrid algorithm. It can be concluded that the proposed algorithm produces robust results and can be a potential tool for estimating the HAPF parameters. The confirmation of the performance of the proposed algorithm is conducted with the results of fitness statistical results, boxplots, and different numerical analyses.

Six Phase Transmission Line Boundary Fault Detection using Mathematical Morphology

Abstract: This paper presents a mathematical morphology based boundary protection scheme for the detection of close-in and remote-end faults that occur on six phase transmission line. A 400 kV, 50 Hz six phase transmission line of 200 km length has been simulated using MATLAB software. The proposed scheme makes use of six phase current measured at the relay location (bus-1) of a six phase transmission line. To assess the performance of the proposed method, various fault parameters are varied. Simulation results reveal the appropriateness of the proposed scheme. Keywords— Six Phase Transmission Line Protection; Mathematical Morphology; Boundary Protection; Fault Detection; Close-In And Remote-End Fault Detection.

Detection of Fault and Identification of Faulty Phase in Series Capacitor Compensated Transmission Line Using Wavelet Transform

Abstract: In this study, wavelet transform is utilized for fault detection and faulty phase identification in a series capacitor compensated three phase transmission line. The series capacitor compensation originates issues in protection schemes of the three phase transmission lines. The proposed technique has been broadly tested using the MATLAB/ SIMULINK test system of a 400 kV, 50 Hz and 300 km long series capacitor compensated three phase transmission line. The three phase currents recorded at only one terminal of the transmission line are used to evaluate wavelet coefficients. Daubechies-5 wavelet is used for the processing of the three phase current signals. A broad range of test studies were carried out for numerous types of shunt faults by varying various fault parameters. Moreover, the proposed technique is also robust to transforming and cross-country faults. The simulation results of the proposed work shows that the proposed technique correctly detects the faults and identifies the faulty phase.

Six Phase Transmission Line Boundary Protection Using Wavelet Transform

Abstract: In this paper, wavelet transform based technique is proposed to detect and classify the close-in and remote-end faults in six phase transmission line. The magnitude of detail coefficients contained in a fault current signal is extracted using daubechies-5 wavelet. Furthermore, the norm of the detail coefficients of current signal in each phase is then calculated which aspires at classifying the faulty phase. Simulation studies were carried out in MATLAB for various types of near-end and far-end faults with variation in fault parameters. The simulation results of wavelet transform based protection technique signify that the proposed method accurately detects and classifies the boundary faults.

A protection technique for series capacitor compensated 400 kV double circuit transmission line based on wavelet transform including inter-circuit and cross-country faults

Abstract: In this paper, wavelet transform based technique is introduced to detect and classify the faults in a series capacitor compensated double circuit transmission line. The three phase currents of both circuits measured at only one end of the series compensated double circuit transmission line are used to calculate the approximate and high frequency detail coefficients including wavelet energy content of each phase current signal. To evaluate the performance of proposed fault detection technique, simulation studies have been carried out on a series capacitor compensated double circuit transmission line test system. The major advantage of this proposed scheme is that it offers protection to entire transmission line length using one end fault current data only. The test results prove that all types of faults are correctly detected and the faulty phase is accurately identified using proposed technique. This technique is robust to the variation in fault type, fault inception time, fault resistance, ground resistance and fault location. Keywords: Fault detection, fault classification, series capacitor compensated double circuit transmission line, wavelet transform

Protection of Series Capacitor Compensated Double Circuit Transmission Line Using Wavelet Transform

Abstract: In this research paper, wavelet transform based technique has been used for fault detection and faulty phase identification in a series capacitor compensated double circuit transmission line (SCCDCTL). The proposed technique has been extensively tested using the MATLAB/SIMULINK test system of a SCCDCTL. The fault data in the current signals of both circuits has been captured using wavelet transform, which aspires at fault detection and identifying the faulty phase. Capability of the proposed technique is evaluated under a wide variation of fault parameters such as fault type, fault inception time, fault location, fault resistance and ground resistance. The main benefit of the proposed technique is that it offers primary protection to the complete transmission line length using single terminal fault current data only. The simulation results of the wavelet transform based proposed technique specifies that it correctly detects the fault and identify the faulty phase.

Protection technique for series capacitor compensated three phase transmission line connected with distributed generation using discrete Walsh Hadamard transform

Abstract: This study proposes a discrete Walsh Hadamard transform (DWHT) based protection technique for the detection of fault and identification of faulty phase in series capacitor compensated three phase transmission line connected with distributed generation (DG). DWHT has been used for processing of the three phase current signals. To recognize the reliability of the proposed protection technique, it is tested for variation in fault type, fault location, fault resistance, ground resistance and fault inception time. Simulation results of DWHT-based proposed technique exemplify that the proposed technique correctly detects the faults and identifies the faulty phase accurately. Keywords: Discrete Walsh Hadamard transform, distributed generation connected series capacitor compensated three phase transmission line, fault detection, faulty phase identification