Faculty Publications
Permanent URI for this communityhttps://idr.nitk.ac.in/handle/123456789/18736
Publications by NITK Faculty
Browse
52 results
Search Results
Item 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. © 2022 Scrivener Publishing LLC. All rights reserved.Item Power Electronics for Electric Vehicles and Energy Storage: Emerging Technologies and Developments(CRC Press, 2023) Kishan, D.; Kannan, R.; Dastagiri Reddy, B.D.; Prabhakaran, P.This text will help readers to gain knowledge about designing power electronic converters and their control for electric vehicles. It discusses the ways in which power from electric vehicle batteries is transferred to an electric motor, the technology used for charging electric vehicle batteries, and energy storage. The text covers case studies and real-life examples related to electric vehicles. The book • Discusses the latest advances and developments in the field of electric vehicles • Examines the challenges associated with the integration of renewable energy sources with electric vehicles • Highlights basic understanding of the charging infrastructure for electric vehicles • Covers concepts including the reliability of power converters in electric vehicles, and battery management systems. This book discusses the challenges, emerging technologies, and recent development of power electronics for electric vehicles. It will serve as an ideal reference text for graduate students and academic researchers in the fields of electrical engineering, electronics and communication engineering, environmental engineering, automotive engineering, and computer science. © 2023 selection and editorial matter, Dharavath Kishan, Ramani Kannan, B Dastagiri Reddy and Prajof Prabhakaran; individual chapters, the contributors.Item 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.Item A Novel PR Controller with Improved Performance for Single-Phase UPS Inverter(Institute of Electrical and Electronics Engineers Inc., 2021) Prabhakaran, P.; Mohan Krishna, S.M.; Febin, F.D.; Perumal, T.Modern uninterrupted power supplies (UPS) are gaining popularity as they can deliver clean and high-quality power under extreme load condition for sensitive devices (like medical, military and communication equipment). Traditional proportional-integral (PI) based control for UPS system provides high-quality output but suffers from the poor dynamic response. In this paper, a novel proportional resonant (PR) controller is proposed for controlling the output voltage of a single-phase inverter. The proposed controller provides a fast-dynamic response, low or zero steady-state error, and reduced total harmonic distortion (THD). A detailed step by step procedure to design the novel controller is presented based on the specific criteria (like steady-state error, overshoot, etc.). Due to the fast response, the proposed PR controller is also suitable for EV charging applications (specifically to the vehicle to load charging). Simulation and experimental results are presented to validate the feasibility and efficacy of the proposed controller. © 2021 IEEE.Item A Novel Single-Pulse Operated SRM Drive with Improved Performance and Integrated On-board Charging Capability for EVs(Institute of Electrical and Electronics Engineers Inc., 2022) Faheemali, T.; Arun Dominic, D.; Prabhakaran, P.In this paper, a novel single-pulse operated SRM drive with integrated on-board charging capability is proposed. The proposed drive is designed for three modes of operation: motoring (driving), regenerative braking, and grid-to-vehicle (G2V) charging. For motoring and regenerative braking mode, single-pulse control (SPC) is utilized to reduce the switching frequency to fundamental value giving the advantage of re-duced switching losses and core losses. To reduce the torque ripple and improve the efficiency of the drive, modifications in the conventional SPC are incorporated and presented. In the proposed SRM drive, the Cuk converter is utilized as a front-end converter to provide a higher demagnetization voltage, eliminating negative torque production and hence improving the torque-ampere ratio. Furthermore, the bidirectional Cuk converter is utilized to provide variable magnetization voltage for speed control and to achieve power factor correction (PFC) operation during charging mode (G2V mode). As the proposed SRM drive supports integrated on-board charger functionality, it reduces the cost and improves the overall power density of the EV. Detailed analysis and MATLAB simulation results are presented to validate the efficacy of the proposed integrated SRM drive and control scheme. © 2022 IEEE.Item A Novel Non-Isolated DC-DC Converter with Active Switched-Inductor for High Voltage Gain Applications(Institute of Electrical and Electronics Engineers Inc., 2022) Mandal, S.; Prabhakaran, P.A Novel, Transformer-less DC-DC Converter for high voltage gain (HVG) applications is proposed in this paper. The proposed converter consists of an active switched inductor for HVG with reduced voltage and current stress across the components. The proposed converter has a voltage gain of (3D+1) times than that of the conventional boost converter. The proposed converter uses fewer components and provides HVG with relatively small duty ratios. A good feature of the proposed topology is all the switches and intermediate capacitors have equal voltage stress. The proposed converter can support bidirectional operation with wide duty ratio variations. The working principle and steady-state analysis of this converter is explained in detail. Dynamic modelling of the converter is presented, and both voltage and current control operations can be carried out. To validate the theoretical analysis, detailed simulation results are presented. © 2022 IEEE.Item Novel Power Converters for Reconfiguration and Voltage Balancing of Dual Battery Pack Based EV(Institute of Electrical and Electronics Engineers Inc., 2022) Kumar, V.; Prabhakaran, P.; Raj, N.Battery Electric Vehicles predominantly come with a single battery pack. Reliability and limited driving range are the main obstacles to EV market growth. To overcome these, dual battery pack-based EVs are seen as a promising alternative for the future. This paper presents two novel power converters suitable for dual battery pack-based Electric Vehicles. The proposed converters can configure and connect two battery packs in series or parallel or operate with a single battery pack. The output terminals of the proposed converters can be connected directly to the charger terminal during charging or to the motor drive inverter during traction. When the EV is neither in charging mode nor in traction mode, and if there is a voltage imbalance between the two battery packs, proposed converters can transfer power from the battery pack with a higher terminal voltage to the other one. The converters' transfer function is derived using state-space averaging and small-signal modeling to design the converter's controller in the voltage balancing mode. The controller is designed using the K-factor approach. Detailed MATLAB simulations and hardware experiments are presented to validate the efficacy of proposed converters in different operating modes. © 2022 IEEE.Item Single-Phase Single Stage High Gain Six Switch Four-Port Converter(Institute of Electrical and Electronics Engineers Inc., 2022) Reddy, M.R.; Dastagiri Reddy, B.D.; Prabhakaran, P.; Kishan, D.This paper proposes a single-phase single-stage high gain six switch four-port (6S4P) converter with a novel modulation scheme. The four ports are 1) a low voltage DC port 2) a high voltage DC port, 3) AC port1 and 4) AC port2. For effective operation of the proposed converter, novel Rectified Inverse Level-shifted Sinusoidal Pulse Width Modulation (RILSPWM) and Phase-shifted Rectified Level-shifted Sinusoidal Pulse Width Modulation (PRLSPWM) schemes are proposed and employed. The proposed converter along with the modulation scheme achieves high voltage gain for both DC and AC ports, and also the ac ports are operated with different magnitudes and frequencies. Thus, improving the power density and reliability of the proposed converter with reduced cost. The performance of the proposed converter is evaluated in the MATLAB/Simulink environment, and the results are presented. © 2022 IEEE.Item A Novel Bidirectional Modified Zeta Converter with Wide Voltage Conversion Ratio(Institute of Electrical and Electronics Engineers Inc., 2023) Mandal, S.; Prabhakaran, P.A Novel, transformer-less, bidirectional and high-gain DC-DC converter is proposed in this paper, which is apt for the interface between two DC voltage levels in various applications, including microgrids. This converter achieves a wide voltage gain with reduced voltage and current stress across the components. The proposed converter supports bidirectional capability with low components. The proposed converter's operating principle and steady-state analysis are explained in detail for continuous conduction mode (CCM). Dynamic modelling of the converter is presented, and closed-loop controllers are designed. The proposed converter operates in both current and voltage control modes. The design of voltage and current compensators are elaborated. Detailed analysis and simulation results are presented in this paper to validate the theoretical analysis and performance of the proposed converter. © 2023 IEEE.Item A Novel Bidirectional Modified SEPIC Converter with Wide Voltage Conversion Ratio(Institute of Electrical and Electronics Engineers Inc., 2023) Mandal, S.; Prabhakaran, P.A Novel, transformer-less, bidirectional DC-DC Converter based on modified SEPIC topology is proposed in this paper. In the proposed converter, an active switched inductor configuration is incorporated in the conventional SEPIC converter to achieve a wide voltage conversion ratio with reduced voltage and current stress across the components. The proposed converter supports bidirectional buck-boost (BBB) capability with low components. The proposed converter's operating principle and steady-state analysis are explained in detail for continuous conduction mode (CCM). Dynamic modelling of the converter is presented and closed-loop controllers are designed. The proposed converter operates in both current and voltage control modes. The design of voltage and current compensators are detailed in this paper. Detailed analysis and simulation results are presented to validate the theoretical analysis and performance of the proposed converter. © 2023 IEEE.