Conference Papers
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Item Battery-ultracapacitor storage devices to mitigate power fluctuations for grid connected PV system(Institute of Electrical and Electronics Engineers Inc., 2016) Sabhahit, N.S.; Gaonkar, D.N.; Jhunjhunwala, J.V.; Karthik, R.P.This paper presents a control strategy based on energy storage systems to minimize the output power fluctuations for a PV system. Solar energy is naturally intermittent with stochastic fluctuations, by virtue of which, stability and power quality of grid operation are affected. This makes grid integration of PV system cumbersome. The aim of this study is to develop a control strategy to deliver smoothened power to the grid, using battery and ultracapacitors for a grid connected hybrid system. The fluctuating power is absorbed by a battery and ultracapacitors during erratic solar power variation, thus being able to mitigate the power fluctuations to the grid. Bidirectional converters are used in tandem with a battery and ultracapacitors to ensure active energy flow between the grid and the storage systems. The inverter control strategy is implemented such that it will maintain a constant DC link voltage. The PV power system is controlled to extract maximum power. Dynamic modeling and simulation study are accomplished using MATLAB/Simulink. © 2015 IEEE.Item Performance of wind system with battery-UC in grid connected mode(Institute of Electrical and Electronics Engineers Inc., 2017) Kumar, A.S.; Gaonkar, D.N.In this paper the performance analysis of wind system connected to grid along with battery and Ultracapacitor (UC) is presented. The variation in battery discharge rate for varying wind speed has been shown. The battery-UC combination is used to smooth wind power output and to control battery discharge rate. The control schemes are employed for controlling and operating the wind based power generation system with storage in grid connected mode. The system performance for different wind speeds, load change is given. The charging of battery and ultracapacitor using wind power is presented. The dispatchable ability of wind system with storage is shown in this work. The power sharing between grid and inverter is also shown with simulation results. © 2016 IEEE.Item Frequency Filtering in Ultracapacitor-Battery Energy Storage System in Electric Vehicles(Institute of Electrical and Electronics Engineers Inc., 2022) Raikar, S.B.; Saha, A.; Vittal, K.P.The Energy Storage System (ESS) of an Electric Vehicle (EV) needs to have both high-power density and high-energy density to fulfil the transient power requirement during vehicle accelerating and decelerating and also to have better driving range. Both of these goals can be achieved through the hybridization of energy sources. In this study, a battery and an Ultracapacitor (UC) combination is used to construct a fully-active Hybrid Energy Storage System (HESS). The HESS architecture is built using two bidirectional DC-DC converters, each one for the two energy sources, respectively, and a DC bus. HESS is sized using vehicle dynamic modelling considering the New European Driving Cycle (NEDC). A rule-based power sharing strategy is employed for the HESS. Further, two frequency filtering-based approaches, namely the Low Pass Filtering (LPF) approach and the Wavelet multilevel Haar Transform, have been developed to control the power flow between the energy sources of HESS and reduce overall battery stress during high transient power demand. For the same driving cycle, different power management strategies are compared in terms of battery status (current, SOC, energy) as well as the UC status (current, energy) followed by battery lifetime extension. The main goal of this study is to investigate the performance of an UC-battery HESS for EVs using the MATLAB/Simulink environment. © 2022 IEEE.Item A Two Switch Multiport Non-Isolated DC-DC Converter for On-Board EV Charging Application(Institute of Electrical and Electronics Engineers Inc., 2024) Vinusha, B.; Kishan, D.; Kalpana, R.This paper proposes multiport DC-DC converter for on-board charger (OBC) EV applications with simultaneous charging of high voltage (HV) battery and low voltage (LV) battery. The evolution of this converter involves replacing the switch found in a conventional step-up converter with a pair of series-connected switches. This arrangement allows for an additional switch node that generates a LV output. the proposed converter has benefits of high voltage gain for HV side, continuous input current, a reduced switching count, regulation of two battery voltages with two switches. Moreover, the inherent shoot-through protection enhances the converter's reliability. The proposed converter exhibits same working principle as that of conventional boost and buck converters. Consequently, the control system methodology remains consistent with that of separate converters, ensuring precise regulation of each output. The working principle, design analysis is discussed. To validate the theoretical analysis, detailed simulation results are presented. © 2024 IEEE.Item Comparative Analysis of Multi-Port DC-DC Converters for Electric Vehicle Applications(Institute of Electrical and Electronics Engineers Inc., 2024) Naik, S.; Shetty, L.G.; Jena, D.; Moger, T.To provide an adequate energy infrastructure for electric vehicles. Multi-port converters offer superior design and execution capabilities than single-port converters, making them particularly advantageous for Electric Vehicles(EVs), The non isolated multi-port dc-dc converter(MPC) topologies are employed in regulating the power distribution across various modules, including photovoltaic (PV) systems, fuel cells (FC), batteries, energy storage systems (ESS), and loads. In this paper few topologies, Multiinput Multioutput (MIMO) boost converter, Dualinput Dualoutput (DIDO) converter, Dualinput hybrid step-up converter(DIHDC), and Four-port converter(FPC), are studied. This will give a thorough analysis of each topology and a detailed performance comparison to aid in the complete under-standing of the benefits and downsides. This study compares a number of components, modes of operation, direction of power flow capability, and design aspects. The simulations study are carried out in MATLAB/Simulink, and are validated with OPAL-RT. © 2024 IEEE.