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Добірка наукової літератури з теми "SPLIT VOLTAGE CONVERTER"

Автор: Grafiati

Опубліковано: 11 вересня 2023

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Статті в журналах з теми "SPLIT VOLTAGE CONVERTER"

Sharan, Bibhuti, and Ashish Malik. "Soft Switching Technique in Bidirectional Dc-Dc Converter for Hybrid Electric Vehicle." Journal of Futuristic Sciences and Applications 4, no. 1 (2021): 36–39. http://dx.doi.org/10.51976/jfsa.412106.

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The voltage at halfway should be equal for optimum voltage gain and energy transfer in order to achieve gentle switching in the bidirectional converter. Both from the side of high voltage to the side of low voltage. But,It is challenging to charge the battery during soft switching. Due to the same voltage level but a larger charging current in the middle. The battery split that is feasible for grid-to-vehicle (G2V) mode of operation when a vehicle's battery splits in two equal voltage part by using relay or breaker circuit configuration. [The forward converter is based on buck topology, the flyback converter is based on buck-boost topology, and both full-bridge and half-bridge converters can be formed from buck and boost topologies. In addition, converter types can be divided into using transformer cores . A net DC current flows in the forward and flyback topologies.

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Leite, Rafael, João Afonso, and Vítor Monteiro. "A Novel Multilevel Bidirectional Topology for On-Board EV Battery Chargers in Smart Grids." Energies 11, no. 12 (December 10, 2018): 3453. http://dx.doi.org/10.3390/en11123453.

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This paper proposes a novel on-board electric vehicle (EV) battery charger (EVBC) based on a bidirectional multilevel topology. The proposed topology is formed by an AC-DC converter for the grid-side interface and by a DC-DC converter for the battery-side interface. Both converters are interfaced by a split DC-link used to achieve distinct voltage levels in both converters. Characteristically, the proposed EVBC operates with sinusoidal grid-side current, unitary power factor, controlled battery-side current or voltage, and controlled DC-link voltages. The grid-side converter operates with five voltage levels, while the battery-side operates with three voltage levels. An assessment, for comparison with classical multilevel converters for EVBCs is considered along the paper, illustrating the key benefits of the proposed topology. As the proposed EVBC is controlled in bidirectional mode, targeting the EV incorporation into smart grids, the grid-to-vehicle (G2V) and vehicle-to-grid (V2G) operation modes are discussed and evaluated. Both converters of the proposed EVBC use discrete-time predictive control algorithms, which are described in the paper. An experimental validation was performed under real operating conditions, employing a developed laboratory prototype.

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Luna, Massimiliano, Antonino Sferlazza, Angelo Accetta, Maria Carmela Di Piazza, Giuseppe La Tona, and Marcello Pucci. "Modeling and Performance Assessment of the Split-Pi Used as a Storage Converter in All the Possible DC Microgrid Scenarios. Part II: Simulation and Experimental Results." Energies 14, no. 18 (September 7, 2021): 5616. http://dx.doi.org/10.3390/en14185616.

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Bidirectional DC/DC converters such as the Split-pi can be used to integrate an energy storage system (ESS) into a DC microgrid providing manifold benefits. However, this integration deserves careful design because the ESS converter must behave like a stiff voltage generator, a non-stiff voltage generator, or a current generator depending on the microgrid configuration. Part I of this work presented a comprehensive theoretical analysis of the Split-pi used as an ESS converter in all the possible DC microgrid scenarios. Five typical microgrid scenarios were identified. Each of them required a specific state-space model of the Split-pi and a suitable control scheme. The present paper completes the study validating the theoretical analysis based on simulations and experimental tests. The chosen case study encompassed a 48 V, 750 W storage system interfaced with a 180 V DC microgrid using a Split-pi converter. It can represent a reduced-power prototype of terrestrial and marine microgrids. A prototypal Split-pi converter was realized in the lab, and several experimental tests were performed to assess the performance in each scenario. The results obtained from the experimental tests were coherent with the simulations and validated the study.

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Dwivedi, Dewang, Arun Kumar Maurya, Ayush Gangwar, Anas Ahmad, Ayush Pratap Maury, and Hemant Ahuja. "Performance analysis of solar PV system for different converter configurations." Journal of Physics: Conference Series 2570, no. 1 (August 1, 2023): 012009. http://dx.doi.org/10.1088/1742-6596/2570/1/012009.

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Abstract In present scenario power electronic converters are of great usage. Almost every electronic industry uses converters in one way or the other. If the converters are integrated with solar PV system, then their various parameters could be thoroughly studied and the most suitable converter could be chosen on the results obtained asper the performance parameters. This research work presents the thorough analysis of a PV system under different converter configurations. Mainly 6 converters are used in this entire research work Buck converter (Step down chopper), Boost converter (Step up chopper), Buck-Boost converter, Split-pi converter, Flyback converter and Linear voltage regulator. Simulations were done on MATLAB/Simulink and on the basis of it results were obtained graphically.

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Luna, Massimiliano, Antonino Sferlazza, Angelo Accetta, Maria Carmela Di Piazza, Giuseppe La Tona, and Marcello Pucci. "Modeling and Experimental Validation of a Voltage-Controlled Split-Pi Converter Interfacing a High-Voltage ESS with a DC Microgrid." Energies 16, no. 4 (February 6, 2023): 1612. http://dx.doi.org/10.3390/en16041612.

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The Split-pi converter can suitably interface an energy storage system (ESS) with a DC microgrid when galvanic isolation is not needed. Usually, the ESS voltage is lower than the grid-side voltage. However, limitations in terms of the ESS current make the use of a high-voltage ESS unavoidable when high power levels are required. In such cases, the ESS voltage can be higher than the microgrid voltage, especially with low microgrid voltages such as 48 V. Despite its bidirectionality and symmetry, the Split-pi exhibits a completely different dynamic behavior if its input and output ports are exchanged. Thus, the present work aims to model the Split-pi converter operating with an ESS voltage higher than the grid-side voltage in three typical microgrid scenarios where the controlled variable is the converter’s output voltage. The devised state-space model considers the parasitic elements and the correct load model for each scenario. Furthermore, it is shown that the presence of the input LC filter can make the design of the loop controllers more complicated than in the case of a lower ESS voltage than the grid-side voltage. Finally, the study is validated through simulations and experimental tests on a lab prototype, and a robustness analysis is performed.

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Ali, Salman, Santiago Bogarra, Muhammad Mansooor Khan, Ahmad Taha, Pyae Pyae Phyo, and Yung-Cheol Byun. "Prospective Submodule Topologies for MMC-BESS and Its Control Analysis with HBSM." Electronics 12, no. 1 (December 21, 2022): 20. http://dx.doi.org/10.3390/electronics12010020.

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Battery energy storage systems and multilevel converters are the most essential constituents of modern medium voltage networks. In this regard, the modular multilevel converter offers numerous advantages over other multilevel converters. The key feature of modular multilevel converter is its capability to integrate small battery packs in a split manner, given the opportunity to submodules to operate at considerably low voltages. In this paper, we focus on study of potential SMs for modular multilevel converter based battery energy storage system while, keeping in view the inconsistency of secondary batteries. Although, selecting a submodule for modular multilevel converter based battery energy storage system, the state of charge control complexity is a key concern, which increases as the voltage levels increase. This study suggests that the half-bridge, clamped single, and full-bridge submodules are the most suitable submodules for modular multilevel converter based battery energy storage system since, they provide simplest state of charge control due to integration of one battery pack along with other advantages among all 24 submodule topologies. Depending on submodules analysis, the modular multilevel converter based battery energy storage system based on half-bridge submodules is investigated by splitting it into AC and DC equivalent circuits to acquire the AC and DC side power controls along with an state of charge control. Subsequently, to validate different control modes, a downscaled laboratory prototype has been developed.

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Siton, Yarden, Vladimir Yuhimenko, Dmitry Baimel, and Alon Kuperman. "Baseline for Split DC Link Design in Three-Phase Three-Level Converters Operating with Unity Power Factor Based on Low-Frequency Partial Voltage Oscillations." Machines 10, no. 9 (August 24, 2022): 722. http://dx.doi.org/10.3390/machines10090722.

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The study sets a baseline for split DC link capacitance values and voltage set points in three-phase three-level AC/DC (or DC/AC) converters operating with unity power factor. In order to equalize the average values of partial DC link voltages, the controller generates a zero-sequence containing DC components only while employing neither dedicated DC link capacitance balancing hardware nor high-order zero-sequence component injection. Such a baseline is required in order to evaluate the effectiveness of different DC link capacitance reduction methods proposed in the literature. Unlike most previous works, utilizing neutral point current based on cumbersome analytical expressions to determine neutral point potential oscillations, the instantaneous power balance-based approach is employed in this paper, resulting in greatly simplified and more intuitive expressions. It is demonstrated that while the total DC link voltage is low-frequency ripple-free under unity power factor balanced AC-side operation, split DC link capacitors absorb triple-fundamental frequency power components with one-sixth load power magnitude. This yields significant opposite phase partial voltage ripples. In such a case, selection of DC link capacitances and voltage set points must take into account the expected values of AC-side phase voltage magnitude and split DC link capacitor voltage and current ratings. Simulation and experimental results validate the proposed methodology by application to a 10 kVA T-type converter prototype.

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De Kooning, Jeroen D. M., Dimitar Bozalakov, and Lieven Vandevelde. "Discrete Time Domain Modeling and Control of a Grid-Connected Four-Wire Split-Link Converter." Electronics 10, no. 4 (February 21, 2021): 506. http://dx.doi.org/10.3390/electronics10040506.

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Distributed generation (DG) allows the production of renewable energy where it is consumed, avoiding transport losses. It is envisioned that future DG units will become more intelligent, not just injecting power into the grid but also actively improving the power quality by means of active power filtering techniques. In this manner, voltage and current harmonics, voltage unbalance or over-voltages can be mitigated. To achieve such a smart DG unit, an appropriate multi-functional converter topology is required, with full control over the currents exchanged with the grid, including the neutral-wire current. For this purpose, this article studies the three-phase four-wire split-link converter. A known problem of the split-link converter is voltage unbalance of the bus capacitors. This mid-point can be balanced either by injecting additional zero-sequence currents into the grid, which return through the neutral wire, or by injecting a compensating current into the mid-point with an additional half-bridge chopper. For both methods, this article presents a discrete time domain model to allow controller design and implementation in digital control. Both techniques are validated and compared by means of simulation results and experiments on a test setup.

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Rao, S. Nagaraja, D. V. Ashok Kumar, and Ch Sai Babu. "Grid Connected Distributed Generation System with High Voltage Gain Cascaded DC-DC Converter Fed Asymmetric Multilevel Inverter Topology." International Journal of Electrical and Computer Engineering (IJECE) 8, no. 6 (December 1, 2018): 4047. http://dx.doi.org/10.11591/ijece.v8i6.pp4047-4059.

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The paper presents distributed generation (DG) system in grid connected mode of operation with asymmetric multi-level inverter (AMLI) topology. Cascaded type DC-DC converter is employed to feed proposed AMLI topology. The DG output voltage (generally low voltage) is stepped up to the required level of voltage using high-gain DC-DC converter. Proposed AMLI topology consists of capacitors at the primary side. The output of high-gain DC-DC converter is fed to split voltage balance single-input multi-output (SIMO) circuit to maintain voltage balance across capacitors of AMLI topology. Cascaded DC-DC converters (both high-gain converter and SIMO circuit) are operated in closed-loop mode. The proposed AMLI feeds active power to grid converting DC type of power generated from DG to AC type to feed the grid. PWM pattern to trigger power switches of AMLI is also presented. The inverting circuit of MLI topology is controlled using simplified Id-Iq control strategy in this paper. With the proposed control theory, the active power fed to grid from DG is controlled and power factor is maintained at unity. The proposed system of DG integration to grid through cascaded DC-DC converters and AMLI structure is validated from fixed active power to grid from DG condition. The proposed system is developed and results are obtained using MATLAB/SIMULINK software.

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Lin, Bor-Ren. "Soft Switching DC Converter for Medium Voltage Applications." Electronics 7, no. 12 (December 18, 2018): 449. http://dx.doi.org/10.3390/electronics7120449.

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A dc-dc converter with asymmetric pulse-width modulation is presented for medium voltage applications, such as three-phase ac-dc converters, dc microgrid systems, or dc traction systems. To overcome high voltage stress on primary side and high current rating on secondary side, three dc-dc circuits with primary-series secondary-parallel structure are employed in the proposed converter. Current doubler rectifiers are used on the secondary side to achieve low ripple current on output side. Asymmetric pulse-width modulation is adopted to realize soft switching operation for power switches for wide load current operation and achieve high circuit efficiency. Current balancing cells with magnetic component are used on the primary side to achieve current balance in each circuit cell. The voltage balance capacitors are also adopted on primary side to realize voltage balance of input split capacitors. Finally, the circuit performance is confirmed and verified from the experiments with a 1.44 kW prototype.

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Більше джерел

Дисертації з теми "SPLIT VOLTAGE CONVERTER"

KUMAR, AMRITESH. "GRID/OFF-GRID MULTILEVEL SPLIT VOLTAGE CONVERTER FOR PHOTOVOLTAIC SYSTEM FEEDING VARIETY OF LOADS." Thesis, 2017. http://dspace.dtu.ac.in:8080/jspui/handle/repository/16168.

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With growing pressure on depleting fossil fuels reserves, the focus has been shifted for harnessing more and more energy from renewable sources for sustainable growth. Photovoltaic system has emerged as a most appropriate solution due to proximity to the load centers and more or less predictable nature of intermittency. Conventional centralized photovoltaic (PV) grid tie inverters suffer from the problem of lower efficiency, high filter size, and limited depth of operation for remaining in connection with the grid, particularly under lower insolation/partial shading condition. The effect is reported to be more pronounced for single stage inverters integrating with weak distribution systems. Further with the advancement of technology the residential loads have witnessed a paradigm shift from linear loads to nonlinear, dynamic and constant power loads which are customizable and configurable to cater specific application. To avoid multiplicity of AC – DC through DC-DC or DC-AC conversions, the concept of DC nanogrids have also evolved to cater the need of a variety of such loads. Investigation of a multirole bidirectional cascaded multilevel converter (CMC) configuration in which a single phase supply is split into 3 different DC links enabling staggered PV connections and possibility of feeding variety of loads have been carried out. The considered configuration is also utilized to feed isolated single phase loads in an off-grid mode using appropriate modulation technique. Considered loads include dynamic, constant power and passive loads in addition to open-end winding induction motor drive (OEIM), battery charging/discharging etc. The connectivity of the load is considered on DC buses while in off-grid/grid connected mode and on AC side too while in off-grid modes. The proposed system configuration and the considered control algorithm suits to the majority of the residential loads while enabling it to act smartly for stabilizing the grid in case of the need. Further investigation on algorithm involved the DC bus balancing embedded in the control to ensure balanced voltage operation or operation at different voltages dictated by individual MPPT controller across the DC links. The control scheme is further explored for bidirectional power transfer with smartly charging/discharging control of the split battery stacks at customized rates depending on the SoC’s of battery stacks and on feeder loading conditions, without disturbing the DC bus voltages. The exploration has been extended for operation during under-voltage grid condition where the customization in proposed algorithm enables the rotating charge control algorithm which helps the grid to stabilize its voltage in conjunction with maintaining life cycle of the battery. The proposed configuration and control enjoys the advantage of 3 separate DC buses having both voltage and power level 1/3rd of the total DC voltage and power, which enables the reduction in the voltage rating of capacitor; making system more modular and compact and deriving power from AC is with reduced voltage THD and providing immunity against unbalanced DC link voltages across the H-bridges. The complete model of the CMC with a variety of loads and their embedded control is analytically derived and simulated in MATLAB Simulink environment before testing on hardware prototype for its validation. A detailed stability analysis is also presented in the d-q frame for the control design to access the feasibility of operation with a variety of loads. The effectiveness of the control algorithm under low grid frequency and dip in voltage conditions are clearly demonstrated through results. The results clearly show derived current from the grid at unity power factor ensuring improved power quality operation. Further, keeping the entire voltages on the DC buses constant or at voltage dictated by MPPT controller ensures immunity against disturbance both from AC or DC side. A comparative analysis is also done for the operation of PV under partial shading condition for a conventional 2 –level PV inverter vis-à-vis proposed CMC-based approach. Further PV-CMC system for enhanced performance under voltage sag is studied to demonstrate the LVRT capability. The d-q based control provides efficient independent and smartly control with active/reactive or both power support depending on the voltage sag and PV panel power condition. The thesis also proposes control techniques for off-grid mode, which will match the utilization and storage of power provided by the PV panels of the same capacity and same size of the battery connected at each level. The control method utilizes rotation policy for the operation of each bridge at each level in three fundamental cycles, to enhance both the lifetime of the battery, the operation of H bridges and PV panels used. Same scale hardware prototype using open end induction motor, passive loads and battery loads (charging/discharging) on different DC links is developed and experimentally validated using requisite hardware and DSP controllers (dSPACE 1104 and dspic33FJ16GS502). The development of hardware including fabrication of various control cards, interface card, voltage and current measurement cards etc. have been indigenously done. Both simulation and experimental results are presented which always show good agreement with theoretical analysis.

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Тези доповідей конференцій з теми "SPLIT VOLTAGE CONVERTER"

Veerachary, Mummadi, and M. Vidyasagar Reddy. "Digital voltage-mode controller design for fourth order split-inductor converter." In 2010 India International Conference on Power Electronics (IICPE). IEEE, 2011. http://dx.doi.org/10.1109/iicpe.2011.5728085.

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Veerachary, M. "Robust digital voltage-mode controller design for split-inductor SEPIC converter." In 2011 Annual IEEE India Conference (INDICON). IEEE, 2011. http://dx.doi.org/10.1109/indcon.2011.6139542.

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Soares and Verdelho. "Voltage regulation system design for the four-wire voltage-converter with split DC link capacitor." In Proceedings of the IEEE International Symposium on Industrial Electronics ISIE-02. IEEE, 2002. http://dx.doi.org/10.1109/isie.2002.1025940.

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Bui, Dai-Van, and Honnyong Cha. "Split-Phase Boost PWM AC-AC Converter with Inherent Output Voltage Balancing." In 2021 24th International Conference on Electrical Machines and Systems (ICEMS). IEEE, 2021. http://dx.doi.org/10.23919/icems52562.2021.9634419.

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Kim, Yejoong, Yoonmyung Lee, Dennis Sylvester, and David Blaauw. "SLC: Split-control Level Converter for dense and stable wide-range voltage conversion." In ESSCIRC 2012 - 38th European Solid State Circuits Conference. IEEE, 2012. http://dx.doi.org/10.1109/esscirc.2012.6341359.

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Silveira, George Cajazeiras, Luiz Daniel Santos Bezerra, Rene Pastor Torrico-Bascope, and Fernando Lessa Tofoli. "DC-DC nonisolated boost converter with high voltage gain adequate for split-capacitor inverter applications." In 2013 Brazilian Power Electronics Conference (COBEP 2013). IEEE, 2013. http://dx.doi.org/10.1109/cobep.2013.6785095.

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Jin, Nan, Chongyan Zhao, and Leilei Guo. "Model Predictive Fault Tolerant Control of Bidirectional AC/DC Converter with Voltage Balance of Split Capacitor." In 2018 International Power Electronics Conference (IPEC-Niigata 2018-ECCE Asia). IEEE, 2018. http://dx.doi.org/10.23919/ipec.2018.8507868.

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Gehrke, Bruna S., Cursino B. Jacobina, Italo R. F. M. P. da Silva, and Reuben P. R. Sousa. "Hybrid Converter with Reduced DC-link Voltage Using an H-Bridge Cell for Split-Phase Power System." In 2020 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE, 2020. http://dx.doi.org/10.1109/ecce44975.2020.9236018.

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Chen, Zhengge, Bochen Liu, Pooya Davari, and Huai Wang. "Efficiency Enhancement of Bridgeless Buck-Boost PFC Converter with Unity PF and DC Split to Reduce Voltage Stresses." In IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society. IEEE, 2018. http://dx.doi.org/10.1109/iecon.2018.8591725.

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Ding, Wenlong, Jiajun Liu, Bin Duan, Xiangyang Xing, and Chenghui Zhang. "Voltage independence control of split-DC bus for a three-phase/level T-type converter with unbalanced loads." In 2017 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE, 2017. http://dx.doi.org/10.1109/ecce.2017.8096523.

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