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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS)
Dewan Ashikur Rahaman
University of Asia Pacific
Control & Systems Engineering Electrical & Electronics Engineering

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Integrated reliability assessment of medium voltage networks incorporating voltage and reactive power performance indices Dewan Ashikur Rahaman; Md. Minhaj Pathan; Aive Alamgir; Md. Masum Howlader; Kazi Mahtab Kadir; Md. Shazzad Dewan; Md. Yakub Hassan
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 17, No 2: June 2026
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v17.i2.pp1243-1253

Abstract

Energy system operation relies on synchronous protection and safety, with stable networks able to handle disruptions without abrupt changes. Due to the complexity of modern electrical systems, contingency analysis is essential for addressing issues in power system analysis. This study presents a comprehensive method for identifying the initial causes of cascading system failures in power systems. Case studies utilizing IEEE test systems with various cascade models demonstrate the effectiveness of this approach. The analysis aids in evaluating the possible impacts on the system and informs preventive strategies to avoid failures. This study integrates voltage stability and reactive power performance indices to create a framework for assessing the reliability of a medium-voltage power network operating at 33 kV. It evaluates N-1 and N-2 contingencies due to line and generator outages to identify and rank critical network components. In contrast to traditional reliability evaluations, the approach identifies weaknesses connected to voltage that impact system resilience. The proposed approach enables improved ranking of severe contingencies beyond conventional methods, supporting targeted reinforcement and enhancing voltage stability and overall system reliability.
THD reduction in a 13-level multilevel inverter using the angle control technique Dewan Ashikur Rahaman; Aive Alamgir; Md Ashraf Hossain; Tapan Kumar Chakraborty; Raisul Islam Rafi; Raiyan Rahman Zihad; Md. Abdullah Al Mahmud; Samia Sarkar
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 17, No 3: September 2026
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v17.i3.pp1982-1993

Abstract

When compared to a traditional multilevel inverter, multilevel inverters can produce switched waveforms with lower amounts of harmonic distortion. Due to their capacity to provide excellent output waveforms at lower switching frequencies and without distortion, multilevel inverters have recently attracted more attention. The dynamic voltage restorer's multilevel topology reduces the output waveform's harmonic distortion without causing inverter power output losses. This study examines the most widely used topologies to determine how the sinusoidal switching angle affects total harmonic distortion (THD%). Among the crucial multilevel topologies, the cascaded H-bridge was selected. Because it needed fewer parts than the others. Asymmetric was selected for observation and simulations of output voltages up to Fifteen levels for equal and sinusoidal angles using PSIM software after a review of the literature. Appropriate switching angles were maintained in this research. With fewer H-bridges, higher-level multilevel inverters have been manufactured.
Co-Authors Aive Alamgir Kazi Mahtab Kadir Md Ashraf Hossain Md. Abdullah Al Mahmud Md. Masum Howlader Md. Minhaj Pathan Md. Shazzad Dewan Md. Yakub Hassan Raisul Islam Rafi Raiyan Rahman Zihad Samia Sarkar Tapan Kumar Chakraborty