Conference Papers
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Item Power management of a hybrid PEMFC-PV and ultracapacitor for stand-alone and grid connected applications(2012) Naik, A.; Yaragatti, R.Y.; Kole, V.This paper presents the integration of photovoltaic (PV), fuel cell (FC) and energy storage systems for reliable power generation. In this system FC is used as main power source and power from PV whenever available is harvested completely with storage system compensating for power fluctuations. This topology has high efficiency, modularity and fuel flexibility. The sources in this hybrid system complement each other very well against environmental variations and load variations. Of the many storage systems the use of ultracapacitor gives advantage of absorbing and contributing to power transients quickly and efficiently. The aim of this study is to design an effective power management system for PV/FC/storage hybrid system thus to give high quality reliable power. MPPT for PV system is used for maximum power extraction. Finally the structure of hybrid system with control strategies for power management is discussed. The proposed hybrid system is modeled, simulated and verified by MATLAB/Simulink simulations for standalone and grid connected systems. © 2012 IEEE.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 Software-in-the-loop based MPPT enabled realtime solar photovoltaics simulator in FPGA platform for academic appreciation(Institute of Electrical and Electronics Engineers Inc., 2017) Singh, S.V.; Shubhanga, K.N.Non-linear solar photovoltaic (SPV) system characteristics and its dependency on meteorological variables of irradiance and temperature; renders this energy source rather involved to visualize. In this paper a low power realtime SPV module simulator is realized in field programmable gate array (FPGA) XCS100E platform for classroom teaching. FPGA platform is used due to its parallel computing nature and lucid hardware description languages (HDL) available. Output of FPGA being high frequency PWM (pulse width modulated) signals, can be used to upgrade the realized simulator at actual power levels through power electronics interfacing. SPV module with MPPT enabling feature is included, which can be used for testing and deployment of various MPPT techniques. © 2017 IEEE.Item Design and analysis of solar photovoltaic array fed modular full-bridge DC-DC converter for 12 kW SMPC(Institute of Electrical and Electronics Engineers Inc., 2018) P, P.S.; Kalpana, R.; Singh, B.This paper discusses the solar photovoltaic (SPV) array fed switched mode power converter (SMPC) using a modular full-bridge dc-dc converter as an intermediate converter. Among the different types of dc-dc converters, the straightforward and uncomplicated boost converter is selected in order to obtain the maximal power from the SPV array. The straightforward boost converter with reduced part count has inherent features of minimizing the output current ripples and possessing an unbounded region for maximum power point extraction. The improved efficiency of the converter is achieved by designing the SPV array to deliver maximum power at rated dc voltage and maximum switch utilization of the boost converter. The design, analysis and operating modes are explained for the proposed converter and the performance is validated through MATLAB/Simulink based simulation. © 2017 IEEE.Item Single stage PV fed reduced inverter based PMSM for standalone water pumping application(Institute of Electrical and Electronics Engineers Inc., 2018) Karthikeyan, A.; Koothu Kesavan, K.K.; Varsha, S.; Venkatesa Perumal, B.; Mishra, S.This paper proposes a standalone PV fed PMSM drive for water pumping. The proposed system aims at reducing the switching losses and overall cost by using reduced switch inverter. The proposed system comprises of a PMSM drive, fed by PV source through an inverter employing reduced number of switches. The inverter uses only four switches whereas the conventional VSI utilizes six switches. Field oriented control scheme is employed to control the PMSM drive. Perturb and Observe (PO) MPPT technique is used to generate a speed reference to PMSM drive. Simulation studies for the proposed PV fed 400 W PMSM driven water pumping system are performed using MATLAB platform and respective results are presented to show the efficacy of the system. © 2018 IEEE.Item Solar Photovoltaic Array fed Push-Pull Buck DC-DC Converter for Telecom Load(Institute of Electrical and Electronics Engineers Inc., 2018) P, P.; Kalpana, R.; Singh, B.This paper discusses the solar photovoltaic (SPV) array fed telecom load using modular push-pull buck dc-dc converter as an intermediate converter. The straightforward boost converter with lesser number of components and single switch device has inherent features of reducing the ripples in its output current. Also, the proposed front-end structure extracts maximum power in the boundless region. The SPV array is designed such that the power at rated dc voltage is supplied to the telecon load and maximum switch utilization of boost converter is achieved which results in improved efficiency of the converter. The design and analysis are carried out for the proposed converter and the performance of the proposed system is validated using MATLAB based simulation. © 2017 IEEE.Item PV fed Hybrid Power Converter for rural home applications(Institute of Electrical and Electronics Engineers Inc., 2019) Karthikeyan, A.; Praneeth, C.V.S.; Koothu Kesavan, K.K.This paper proposes a standalone PV fed hybrid power converter for rural home applications. The aim of the proposed system is to simultaneously deliver the power extracted from PV panels to DC and AC home loads using the proposed hybrid converter topology. The system operates in either MPP or Non-MPP mode depending on the total power demanded by the loads. Modified Perturb and Observe (PO) MPPT algorithm is used to extract maximum power from PV panels. SPWM based modified PWM technique is used for converter operation. In the MPP mode the power distribution to DC load and AC load is in accordance with the duty generated by modified MPPT. In Non MPP mode, power distribution is in accordance with the duty generated by the single loop voltage control for DC load. The simulation studies for the proposed system are carried out in MATLAB/SIMULINK environment. © 2019 The Korean Institute of Power Electronics (KIPE).Item Implementation of Perturbation-Based MPPT Technique Using Model-Based Design(Springer Science and Business Media Deutschland GmbH, 2020) Angadi, S.; Yaragatti, U.R.; Yellasiri, Y.; Raju, A.B.Maximum Power Point Tracking (MPPT) algorithms are imperative in solar Photovoltaic (PV) systems. This paper presents a simple approach for real-time implementation of perturbation-based MPPT algorithms employing model-based design (MBD) and Rapid Control Prototyping (RCP). To validate the proposed approach, classic Perturb and Observe (P&O) algorithm is tested. Altair’s Embed software and low-cost Texas Instruments (TI) DSP controller is used for implementation. All the fundamental blocks required for the implementation of perturbation-based MPPT algorithms are discussed in detail. Hardware-in-Loop (HIL) simulation using Altair Embed for selection of appropriate sampling time and perturbation step size is demonstrated. The readers will also be presented with details of fundamental fixed point blocks of Altair Embed software for the implementation of other MPPT algorithms using low-cost controllers. © 2020, The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.Item Hardware Prototype for Portable Automatic MPPT Solar Charger Using Buck Converter and PSO Technique(Institute of Electrical and Electronics Engineers Inc., 2022) Parandhaman, M.; Annambhotla, L.T.S.; Parthiban, P.This paper presents hardware construction and testing of portable Maximum Power Point Tracking ((MPPT) devices. MPPT implementations utilize algorithms that read panel voltages and currents, and then calculate the maximum power available at that particular time. The Perturb and Observe (P& O) method needs a periodic sweep along the power curve to detect the maxima( can be local or global). The time taken to converge at MPP is significant, and thus the efficiency of conversion is drastically reduced. This work incorporates Particle Swarm Optimization (PSO) technique in replacement with the traditional P& O method to enhance the tracking speed and ensure the global maxima is achieved. In PSO technique, multiple search elements are introduced and a quantitative decision is evaluated among these search elements, and thus the convergence speed is increased by a factor of the number of elements used in the search. The hardware construction is compact and reliable, enhancing its application in various fields like unmanned aerial vehicles for long endurance The simulation studies were conducted on MATLAB / Simulink, and hardware design of the same was implemented. Contributions were made in finding practical testing and validation procedures for customized MPPT devices. © 2022 IEEE.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.