Browsing by Author "Febin, J.L.F."

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An Integrated Onboard EV Charger With Wide Voltage Range Compatibility
(Institute of Electrical and Electronics Engineers Inc., 2025) Kumar, V.; Prabhakaran, P.; Reddy, B.D.; Febin, J.L.F.
Electric vehicles (EVs) typically employ separate onboard chargers and traction inverters for battery charging and motor operation, respectively. This paper proposes a bidirectional integrated onboard charger (BIOC) that utilizes a single power converter to perform both functions, thereby reducing cost, improving system compactness, and supporting fast charging. The proposed BIOC architecture is implemented using a totem-pole power factor correction (PFC) stage combined with an additional coupling unit. This configuration supports a wide range of battery voltages and is compatible with both AC and DC grid inputs. The BIOC incorporates active power decoupling (APD) to minimize voltage ripple at the battery terminals during high-voltage (HV) battery charging. Leakage current analysis of the totem-pole PFC stage confirms compliance with safety standards, and a detailed switch loss calculation procedure is presented. A comprehensive controller design is developed using State-Space Averaging (SSA) and Small Signal Modelling (SSM), followed by a K-factor method to ensure optimal performance across various operating modes. The proposed system is validated through simulations on a 2 kW Simulink model and experimental testing on a 400 W scaled-down prototype, demonstrating effective charging of an EV battery across a wide voltage range from both AC and DC grids. This work offers a unified, efficient, and cost-effective solution for integrated onboard EV charging. © 2013 IEEE.
Economic feasibility studies of simple and discounted payback periods for 1 MWp ground mounted solar PV plant at tirupati airport
(wiley, 2022) Mohan, K.S.; Mahapatra, S.; Febin, J.L.F.; Perumal, T.; Raj, S.; Prabhakaran, P.
Impending exhaustion of fossil fuels and concerns related to environmental pollution and climate changes have led to extensive usage of renewable energy sources in the utility grid. Among the renewable energy sources, solar photovoltaics (PVs) are gaining popularity and are considered a potential solution for future electrical energy crises. Despite the technical benefits of solar PV, an economic feasibility analysis is critical in assessing the viability of a long-term solar PV project. In this chapter, the economic feasibility of a ground-mounted solar PV system at Tirupati Airport, India, is carried out considering two leading economic indices-simple payback period (SPP) and discounted payback period (DPP). The performance analysis between the two payback periods and a comparison table is presented. Finally, better energy-efficient measures like replacing the existing CFLs with LEDs are highlighted in this chapter to reduce operational costs and energy consumption, resulting in direct monetary benefits. © 2022 Scrivener Publishing LLC. All rights reserved.
Smart grids and microgrids: Technology evolution
(wiley, 2022) Prabhakaran, P.; Subramaniam, U.; Mohan Krishna, S.M.; Febin, J.L.F.; Brijesh, P.V.
The power supply is one of the most important issues of our time. In every country, all over the world, from refrigerators to coffee makers to heating and cooling, almost everyone in the world needs to have access to power. As the global demand rises, new methods of delivering power, such as smart grids and microgrids, have, out of necessity or choice, been developed and researched. In this book, modern and advanced concepts of both microgrid and smart grid technology are introduced. Beginning from the brief fundamental concepts of microgrids and its various constituents this team of experts discusses different architectures, control issues, communication challenges, measurement, stability, power quality and mitigation, protection, and power electronic aspects of the microgrid system. Through this book, tools and techniques needed to design both microgrids and smart grids are discussed. Recent and developing topics like smart meter impact, remote data monitoring, communication protocols, cybersecurity, artificial intelligence, big data, IoT, and many others are covered. Furthermore, this new volume also covers simulation and stability analysis tools pertaining to microgrids and smart grids. Throughout the book, detailed examples of microgrid and smart grid design and development strategies are provided, based on different constraints and requirements. Case studies, numerical models, and design examples are also included. Whether for the veteran engineer or student, this is a must-have volume for any library. Audience: Engineers, scientists, industry professionals, students, and other lay people involved in the business of smart grids and microgrids. Â© 2022 Scrivener Publishing LLC. All rights reserved.