Faculty Publications
Permanent URI for this communityhttps://idr.nitk.ac.in/handle/123456789/18736
Publications by NITK Faculty
Browse
17 results
Search Results
Item Energy storage system in microgrid(wiley, 2022) Ahmad, M.W.; Raushan, R.The energy storage systems (ESS) integrated microgrid have grown attention and acceptance because it has power reliability and sustainable energy utilization capability. Several ESS has been introduced with significant characteristics such as performance, size, life cycle, charging/discharging, safety, reliability, capacity, and cost. This chapter comprehensively reviews the types of ESS technologies, configurations, classifications, features, energy conversion, life cycle, and advantages and disadvantages. Moreover, the power electronics converter interfacing the microgrid has also been briefly studied. The present review critically demonstrates the interfacing circuits of ESS to microgrids. The mathematical modeling of bidirectional DC-DC converter interfacing the ESS to DC microgrid is presented developed. Moreover, the modeling and control of VSI interfacing the BESS to a three-phase grid is also demonstrated. The simulation model for both systems is also developed in MATLAB-Simulink. A critical review of the obtained simulation results is presented to show the ability of the DC-DC converter and VSI system for charging the BESS and delivering the power to the microgrid as per the requirement assigned by the higher-level controller of the microgrid. © 2022 Scrivener Publishing LLC. All rights reserved.Item Recent advancements in switched capacitor-based multilevel inverters(River Publishers, 2025) Kumar, D.; Raushan, R.; Kumari, D.; Bhushan, R.This chapter comprehensively reviews recent advances in switched capacitorbased multilevel inverters (SCMLIs) within the realm of power electronics. It outlines the fundamental principles of multilevel inverters, underscoring the role of switched capacitors in achieving higher voltage levels and refined waveform quality. The chapter critically examines the challenges in switched capacitor-based multilevel inverter designs, emphasizing recent research on circuit topologies and modulation strategies, including aspects like voltage balancing. Moreover, it discusses the integration of SCMLIs in electric vehicles and renewable energy systems and highlights their potential to enhance efficiency, improve power quality, and seamlessly integrate with modern power grids. The chapter succinctly captures the forefront of SCMLI technology, offering insights into its transformative impact on ongoing innovation to address evolving challenges in inverter topologies. © 2025 River Publishers. All rights reserved.Item PV Array Dynamic Reconfiguration by leveling the Solar Irradiance under Partial Shading Conditions(Institute of Electrical and Electronics Engineers Inc., 2022) Kumar, D.; Raushan, R.Solar photovoitaic (PV) energy generation system is the major part of renewable energy that can full-fill the growing demands and reduction in conventional energy at negligible op-erating cost with nil greenhouse gas emission. However, efficiency of Solar PV needs to be enhanced, and it can be achieved by PV array reconfiguration along with maximum power point tracking (MPPT). However, the reconfiguration based on physical relocation of the modules is time consuming and limited to known shading patterns and small PV energy generation systems. Therefore, PV Array Dynamic Reconfiguration by leveling the solar irradiance is proposed in this paper. After reconfiguration, the global maximum power point is tracked by the P and O optimization technique. The main advantage of the proposed technique is the reduction of the number of switches applied for the reconfiguration under partial shading conditions. © 2022 IEEE.Item A Novel Common Neutral Line Thirteen-Level Switched Capacitor Boost Inverter with Inductive load ability(Institute of Electrical and Electronics Engineers Inc., 2023) Kumar, D.; Raushan, R.In recent times, researchers have been trying to reduce the number of switches and boost the voltage gain in the multilevel inverter (MLI). It can be accomplished easily in mid-point switched capacitor MLI. However, while doing so, the voltage stress on the semiconductor devices increases significantly, which reduces the inverter's reliability. In addition, it is unable to reduce the leakage current in solar photovoltaic applications. Therefore, A novel single-source common neutral line thirteen-level switched capacitor boost inverter is proposed in this paper. It has lesser voltage stress on semiconductor devices, a sixfold voltage-boosting ability, and good reliability. Moreover, its common neutral line provides the features of a common grounding, which allows it to be used in solar PV systems, as it reduces leakage current significantly. To operate the proposed inverter, the nearest level control technique has been implemented in MATLAB/Simulink. The results have been analyzed and discussed to show the goodness of the inverter. The comparison analysis has also been included to strengthen the effectiveness of the proposed inverter. © 2023 IEEE.Item Neural Network-Based Sensorless Control of Flyback Converter for Cell Balancing(Institute of Electrical and Electronics Engineers Inc., 2025) Premarajan, P.; Raushan, R.; Bhushan, R.A conventional control system with an active clamp flyback converter uses a feedforward method that involves feeding the input to a mathematical model beforehand to adjust the duty cycle accordingly. The feedforward method uses a mathematical model that involves a lot of calculations to obtain an efficiency alike feedback system. Integrating a neural network trained with a feedback system data output can be used as a replacement for the mathematical model to have performance as par with the feedback system. Sensors are used to measure the voltages for the feedback circuit to work. This work investigates the potential of utilizing a neural network to enable sensorless operation within a feedforward control system to regulate the voltage input to the cell balancina system. © 2025 IEEE.Item Renewable Power Integration for Electric Vehicle Charging System: A Review(Institute of Electrical and Electronics Engineers Inc., 2025) Nirala, P.K.; Barik, A.K.; Bhushan, R.; Jagtap, K.M.; Raushan, R.This review paper accentuates on the conceivable integration of renewable based generations to the charging stations of Electric Vehicles (EVs) towards restraining the carbon emissions. The intensifying global demand for EVs in recent days puts stress on conventional grid with existing infrastructure, which could be relaxed by integration of renewable based power generations with ecological balance. The importance and feasibility of renewable integrations to charge the EVs are reviewed in this paper and suitable applications are reported to develop charging infrastructures for EVs. The importance of vehicle to grid (V2G) concept is also reviewed to facilitate ancillary support to future grid integrated with renewables. © 2025 IEEE.Item Digital Control System Based Isolated Totem Pole Converter for Electric Vehicle Onboard Chargers(Institute of Electrical and Electronics Engineers Inc., 2025) Das, A.K.; Raushan, R.; Kumar, P.The Totem-Pole converter is well-suited for lowpowered electric vehicle (EV) applications. The isolated configurations of such converters provide single-stage power conversion that overcomes the more conversion stages. A robust controller can satisfy the converter operations efficiently for on-board charging applications. In this paper, a modified digital control method for totem-pole PFC cascaded active flyback DC-DC converters functioning in discontinuous conduction mode (DCM) is proposed. The auxiliary switch and clamp capacitor are used to recycle the stored energy in the transformer to reduce the spike voltage. The main purpose of adding PFC is to obtain the input current in phase with the input voltage, keeping total harmonic distortion (THD) low to improve the efficiency of the converter. © 2025 IEEE.Item Five-Level Switched Capacitor Inverter for Photovoltaic Applications(Taylor and Francis Ltd., 2022) Singh, A.K.; Mandal, R.K.; Raushan, R.; Anand, R.This paper proposes a switched-capacitor based single-phase five-level inverter configuration that operates under boost operation and generates a voltage that is more than the DC source voltage. The proposed five-level inverter uses a capacitor and boots the output voltage. In this proposed inverter, capacitor gets charged in parallel while it discharges in series connections so that output voltage may attain higher magnitude than the DC source voltage. Sinusoidal Pulse Width Modulation-based techniques are considered to produce the required gate pulses for operating the switching devices of the inverter. The five-level switched-capacitor inverter is combined with the PV system via DC–DC boost converters to extract the maximum power using MPPT algorithm. To verify its capability, the PV-based system is further integrated to the utility grid. The operation and performance of the suggested switched-capacitor inverter coupled with the grid-connected PV system are also analyzed by developing its model in MATLAB/Simulink environment. © 2022 IETE.Item A New Single-Source Nine-Level Quadruple Boost Inverter (NQBI) for PV Application(Institute of Electrical and Electronics Engineers Inc., 2022) Singh, A.K.; Raushan, R.; Mandal, R.K.; Ahmad, M.W.Multi-level inverters (MLIs) with switched capacitors are becoming popular due to their utilization in AC high-voltage applications as well as in the field of renewable energy. To achieve the required magnitude of output voltage, the switched capacitor (SC) technique employs a lesser number of DC sources in accordance with the voltage across the capacitor. Designing an efficient high-gain MLI with fewer sources and switches needs a rigorous effort. This paper introduces a prototype of a nine-level quadruple boost inverter (NQBI) topology powered by one solar photo-voltaic source using fewer capacitors, switches, and diodes when compared to the other SC-MLIs topology. The suggested NQB inverter produces nine levels of voltage in its output by efficiently balancing the voltages of the two capacitors. The various SC-MLIs are compared in order to highlight the benefits and drawbacks of the proposed nine-level quadruple boost inverter (NQBI) topology. To validate the efficacy of the proposed solar photovoltaic based NQBI without grid connection, detailed experimental results are presented in a laboratory setting under various test conditions. © 2013 IEEE.Item Comparative Analysis of Maximum Power Point Tracking Algorithms for Standalone PV System Under Variable Weather Conditions(River Publishers, 2022) Ghatak, A.; Pandit, T.; Kishan, D.; Raushan, R.Renewable energy systems are becoming increasingly predominant in the current scenario, and Photovoltaic (PV) arrays are one of the most widely used renewable energy generation sources. The current-voltage characteristics of PV arrays are non-linear, necessitating the need for supervisory techniques in order to ensure that the array functions at maximum efficiency, which is performed by Maximum Power Point Tracking (MPPT) techniques. These techniques are categorized into classical, intelligent and optimization algorithms. This paper performs a comparative analysis between five different MPPT techniques belonging to these categories – Perturb and Observe (P&O), Incremental Conductance (IC), Fuzzy Logic Control (FLC), Particle Swarm Optimization (PSO) and Cuckoo Search Algorithm (CSA). A standalone PV system interfaced with a Boost converter is simulated on MATLAB Simulink for the performance evaluation of the MPPT techniques. Solar energy is extremely susceptible to changes in local weather conditions, mainly variations in solar insolation levels. The designed system is tested against a varying insolation profile in order to examine the robustness of the MPPT techniques, with their operation efficiencies showcased. © 2022 River Publishers.