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All Journal Scientific Journal of Engineering Research Methods in Science and Technology Studies
Emon, Asif Eakball
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Engineering

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Comparative Analysis and Modeling of Single and Three Phase Inverters for Efficient Renewable Energy Integration Emon, Asif Eakball; Molla, Sohan; Shawon, Md; Tabassum, Anika
Scientific Journal of Engineering Research Vol. 1 No. 4 (2025): December
Publisher : PT. Teknologi Futuristik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.64539/sjer.v1i4.2025.325

Abstract

This work details the hands-on design, simulation, and direct performance comparison of single-phase and three-phase grid-connected photovoltaic (PV) inverters, fully implemented and tested within the MATLAB/Simulink environment. Moving beyond theoretical descriptions, we constructed detailed models incorporating practical elements: a PV array, a DC-DC boost converter with Perturb and Observe (P&O) Maximum Power Point Tracking (MPPT) for real-world energy harvesting, and both single-phase H-bridge and three-phase two-level voltage source inverters (VSIs) feeding the grid through carefully designed LCL filters. We subjected both systems to identical, realistic solar irradiance profiles and rigorously analyzed critical performance metrics side-by-side, including output waveform quality (Total Harmonic Distortion - THD), power conversion efficiency, DC-link voltage stability, and MPPT effectiveness. Our simulation results clearly demonstrate distinct operational characteristics: the three-phase inverter consistently delivered superior efficiency (approximately 97.8% vs. 96.5%), significantly lower output current THD (below 2.0% vs. approximately 3.8%), and reduced DC-link voltage ripple. Conversely, the single-phase topology offers inherent simplicity and lower cost for lower-power applications. This comparative analysis provides concrete, simulation-backed insights into the fundamental trade-offs between complexity, cost, efficiency, and power quality, directly informing the optimal selection of inverter technology—single-phase for standard residential use or three-phase for commercial/industrial systems demanding higher performance.
A Novel Wavelet-Based Approach for Transmission Line Fault Detection and Protection Emon, Asif Eakball; Ahammad, Jalal
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 Emon, Asif Eakball; Tabassum, Anika
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.
Co-Authors Ahammad, Jalal Molla, Sohan Shawon, Md Tabassum, Anika