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p-Index From 2021 - 2026
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All Journal Journal of Applied Science and Advanced Engineering Scientific Journal of Engineering Research Methods in Science and Technology Studies
Asif Eakball Emon
Bangladesh University of Business and Technology
Computer Science & IT Electrical & Electronics Engineering Engineering Mechanical Engineering Physics

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 1 
A Novel Wavelet-Based Approach for Transmission Line Fault Detection and Protection Asif Eakball Emon; Jalal Ahammad
Scientific Journal of Engineering Research Vol. 2 No. 1 (2026): March
Publisher : PT. Teknologi Futuristik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.64539/sjer.v2i1.2026.374

Abstract

The reliable operation of modern power systems is critically dependent on the rapid and accurate isolation of transmission line faults, as failures can trigger cascading outages with severe socioeconomic consequences. While conventional protection schemes like overcurrent and distance relays are widely deployed, they exhibit limitations in speed, selectivity, and performance under high-impedance or evolving fault conditions, representing a significant gap in ensuring grid resilience. To address this, the objective of this research is to design and validate a novel Wavelet Transform Analysis with traditional relaying to enhance fault detection and classification. Through comprehensive modeling and simulation in MATLAB/Simulink, the proposed system demonstrated a mean fault detection time of 11.4 milliseconds and an accuracy of 99.8%, significantly outperforming conventional methods, particularly in challenging scenarios such as high-impedance and intermittent faults. These findings imply that the wavelet-enhanced framework offers a robust, adaptive solution for modern and future power networks, contributing directly to improved system stability, reduced outage times, and a foundational step toward intelligent, self-securing grid infrastructure.
An Iterative Modeling and Validation Study of a Low-Cost Thyristor-Based Controlled Half-Wave Rectifier Asif Eakball Emon; Anika Tabassum
Methods in Science and Technology Studies Vol. 1 No. 2 (2025): December
Publisher : PT. Teknologi Futuristik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.64539/msts.v1i2.2025.354

Abstract

The effective teaching of power electronics is critical for developing engineers capable of addressing global energy challenges, yet a persistent gap exists between idealized theoretical models and the non-ideal behavior of physical systems. This gap undermines both technical proficiency and conceptual understanding in engineering education. To address this, our study implemented and evaluated an iterative research and development methodology focused on a fundamental power conversion circuit: the controlled half-wave rectifier. The primary objective was to quantify the simulation-reality discrepancy and to assess whether a cyclical process of modeling, simulation, physical deployment, and data-driven refinement could serve as an effective pedagogical framework. Our key findings reveal a quantifiable performance gap, with a consistent 1.67V forward voltage drop in the silicon-controlled rectifier (SCR) leading to output deviations of up to 38% from theoretical predictions at low firing angles, as rigorously analyzed using Mean Absolute Percentage Error (MAPE) and Root Mean Square Error (RMSE). Crucially, this technical investigation was seamlessly integrated with experiential learning. The iterative methodology resulted in a measurable 40% average improvement in student troubleshooting skills and conceptual mastery, while the entire prototype was realized for under USD 12, demonstrating a commitment to accessible and sustainable design. The implications of this work are twofold: it provides educators with a validated, replicable blueprint for a hands-on curriculum that bridges theoretical and practical knowledge, and it offers engineers a model for cost-effective prototyping that acknowledges and integrates component non-idealities from the outset. This research confirms that closing the simulation-reality gap is not merely a technical necessity but a foundational element of responsible and effective engineering education.
A Novel Cascaded-Clamping Technique for Reliable High-Gain Discrete Boost Converters Asif Eakball Emon
Journal of Applied Science and Advanced Engineering Vol. 4 No. 2 (2026): JASAE: September 2026
Publisher : Master Program in Mechanical Engineering, Gunadarma University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59097/jasae.v4i2.90

Abstract

Discrete boost converters are still very important for power applications that need to be cheap, easy to change, and educational. However, it has a big problem when trying to get high voltage gain from low input sources. Conventional designs often don't work well below 5V because of IC oscillator thresholds, and single-transistor switching stages are not very efficient and put a lot of stress on the circuit. This work fills in these gaps by creating a new architecture that focuses on reliability and includes a discrete astable multivibrator, a cascaded BJT driver network, and an active Zener clamping-regulation circuit. The proposed converter clearly works well with an input voltage as low as 1V, has a voltage gain of more than 2.5, and reaches a peak efficiency of 94.6%, all while keeping great line/load regulation and transient response. These important results, which were confirmed by simulation and experimental prototyping, show that the design is better than most IC-based converters in terms of input range and light-load efficiency. The study presents a thoroughly characterized, reproducible framework that revitalizes the practical application of discrete BJT-based power electronics, presenting a resilient alternative for low-voltage energy harvesting, prototyping, and educational initiatives.
Co-Authors Anika Tabassum Jalal Ahammad