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    Wyświetlanie 1-7 z 7
    Tytuł:
    A Hybrid Energy Storage System with Reconfigurability and Fast Equalisation
    Autorzy:
    Jiang, Bowen
    Liu, Yujing
    Powiązania:
    https://bibliotekanauki.pl/articles/2175944.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    energy storage system
    reconfiguration
    active balancing
    electric vehicle
    Opis:
    With the rapid growth of electric vehicles (EVs) in recent years, the research on their energy storage systems (ESSs) has also shown great popularity. A traditional ESS normally has a fixed configuration and uses a single type of energy storage unit. However, this traditional design has some limitations, such as low flexibility and high requirements to unit consistency. To solve these problems, a new hybrid energy storage system is proposed in this paper. The proposed ESS hybridises multiple lithium-ion battery modules and one supercapacitor module. By controlling the states of switches inside the ESS topology, module level reconfiguration can be achieved. Further, a DC/DC converter is also included in the ESS topology, which is connected to the supercapacitor module and can be used to ensure correct ESS output voltage. Reconfiguration and active balancing algorithms are also given based on the proposed ESS topology. Situations with and without bypassing the lithium-ion battery modules are both discussed in the algorithms. The proposed hybrid ESS is finally verified with simulations. The system model is built in the Simulink/MATLAB environment. Simulation results show that the lithium-ion modules with a lower state of charge values have higher priorities to be connected in parallel. Reconfiguration actions are able to balance all lithium-ion battery modules within one Worldwide Harmonised Light-Duty Vehicle Test Cycle (WLTC) simulation cycle while maintaining ESS output voltage within a correct range. Furthermore, the proposed hybrid ESS control algorithms remain valid when one lithium-ion battery module is manually bypassed during simulation.
    Źródło:
    Power Electronics and Drives; 2022, 7, 42; 68--83
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of hybrid energy storage system for electric vehicles
    Autorzy:
    Piriienko, S.
    Balakhontsev, A.
    Beshta, A.
    Albu, A.
    Khudoliy, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1193273.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    electric vehicle
    battery
    ultracapacitor
    hybrid storage system
    optimization
    DC/DC converter
    topology
    Opis:
    The paper deals with improvement of efficiency of energy storage devices for electric vehicles. The benefits and features of the hybrid energy storage system based on the batteries and ultracapacitors are described. The possible topologies and common schematics of bi-directional DC/DC converters for energy storage are analyzed in terms of efficiency, reliability and battery maintenance. An algorithm for optimization of its parameters is developed, analyzed, shown and explained in detail. The surfaces, which show the dependence between required battery and ultracapacitors’ capacities, energy storage cost and battery discharge ratio are obtained and analyzed. Conclusions are drawn concerning optimization strategy and results of optimization with possible further improvements.
    Źródło:
    Power Electronics and Drives; 2016, 1, 36/2; 97-111
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Coordination Control between Battery and Supercapacitor Energy Storage Systems to Segregate Power for On-Grid Application
    Autorzy:
    Sangiri, Jeemut Bahan
    Bhowmick, Supratik
    Maiti, Suman
    Chakraborty, Chandan
    Powiązania:
    https://bibliotekanauki.pl/articles/2175941.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    hybrid energy storage system
    battery control
    power segregation
    coordination control
    energy management
    Opis:
    The present work describes a control methodology for a hybrid energy storage system (HESS) to improve its transient performance under dynamic load conditions. The proposed coordination control enhanced life cycle performance by segregating the power between battery energy storage systems (BESS) and a supercapacitor (SC). The BESS and SC are connected parallel to each other, and two individual DC–DC bidirectional converters connect them to a common DC bus. The coordination control is established between the controllers of BESS and the SC of HESS, which helps to utilise the usable energy capacity of the HESS. The charging/discharging current of the BESS is controlled within the allowable safety range based on the slope and magnitude of the BESS current. The high-frequency power component is handled by the SC, which helps to reduce the extra exhaustion on the BESS during operation with a higher current. The proposed coordination control of HESS is validated through simulation and the results show the effectiveness of the proposed controller.
    Źródło:
    Power Electronics and Drives; 2022, 7, 42; 227--245
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Charging and Discharging Strategies for Clustered Regional Energy Storage System
    Autorzy:
    Li, Yang
    Janik, Przemysław
    Pfeiffer, Klaus
    Schwarz, Harald
    Powiązania:
    https://bibliotekanauki.pl/articles/2175940.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    charging strategy
    discharging strategy
    energy storage system
    energy-to-power ratio
    fuzzy logic control
    Opis:
    With the massive expansion of decentralised renewable energy in electricity grid networks, the power supply system has been changed from centralised to decentralised one and from directional to bi-directional one. However, due to the regional energy structure difference in the power imbalance between electricity generation and consumption is becoming more and more serious. A grid-scale energy storage system (ESS) can be one solution to balance the local difference. In this paper, two charging/discharging strategies for the grid-scale ESS were proposed to decide when and with how much power to charge/discharge the ESS. In order to realise the two strategies, this paper focuses on the application of fuzzy logic control system. The proposed strategies aim to reduce the peak power generation, consumption and the grid fluctuation. In particular, this paper analysis the ratio between energy-capacity and rated power of ESS. The performance of the proposed strategies is evaluated from two aspects, the normalised power of ESS itself and the influence on the power grid. Simulation studies were carried out on the rule-based control systems with different energy-to-power (e2p) ratios, and the results show that the proposed charging strategy with combination of extreme situation of power imbalance and the rest capacity of ESS provides a smooth load curve for the regional power grid system while the external power exchange is reduced effectively.
    Źródło:
    Power Electronics and Drives; 2022, 7, 42; 56--67
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sliding Mode Control of Hybrid Renewable Energy System Operating in Grid Connected and Stand-Alone Mode
    Autorzy:
    Benadli, Ridha
    Bjaoui, Marwen
    Khiari, Brahim
    Sellami, Anis
    Powiązania:
    https://bibliotekanauki.pl/articles/1955980.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    sliding mode control
    grid-connected mode
    stand-alone mode
    hybrid renewable energy system
    wind turbine
    photovoltaic
    battery energy storage system
    maximum power point tracking
    Opis:
    This paper studies innovative application of sliding mode control (SMC) for a Hybrid Renewable Energy System (HRES) in grid-connected and autonomous modes of operation. The considered HRES includes a photovoltaic (PV), wind turbine (WT) based on a Permanent Magnet Synchronous Generator (PMSG). The PV generator is coupled to the common DC bus via a DC/DC converter. The latter is controlled by an MPPT algorithm based on the Adaptive Perturbation and Observation Algorithm Method (APOAM) to search the optimum working of this source. A SMC is utilized to manage the PV voltage to achieve the Maximum Power Point (MPP) by altering the obligation duty cycle. The battery interfaced by a bidirectional buck-boost DC/DC converter can be charged or discharged depending on the production situation. On the one hand, the wind turbine conversion chain is equipped with a PMSG and a rectifier controlled to regulate the operating point of the wind turbine to its optimum value. During a Stand-Alone Mode (SAM) operation, the Voltage Source Converter (VSC) was used for controlling the output voltage in terms of amplitude and frequency delivered to the AC load. However, in Grid-Connected Mode (GCM) operation, the VSC was adapted to control the electrical parameters of the grid. To better appreciate the advantages of the proposed SMC approach, we have proposed a series of comparative tests with the conventional PI control in the operating modes GC and SA and under different scenarios. The proposed control strategy has undeniable advantages in terms of control performance and very low total harmonic distortion THD value compared with the conventional PI control. Finally, It is concluded that the proposed approach improves the quality and provides a stable operation of the HRES.
    Źródło:
    Power Electronics and Drives; 2021, 6, 41; 144-166
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Linear programming models for optimal workload and batching in pick-and-pass warehousing systems
    Autorzy:
    Tarczyński, Grzegorz
    Powiązania:
    https://bibliotekanauki.pl/articles/27315330.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    linear programming
    order picking
    optimal storage
    pick-and-pass system
    Opis:
    Pick-and-pass systems are a part of picker-to-parts order-picking systems and constitute a very common storage solution in cases where customer orders are usually small and need to be completed very quickly. As workers pick items in the zones connected by conveyors, their work needs to be coordinated. The paper presents MILP models that optimize the order-picking process. The first model uses information about the expected demand for items to solve the storage location problem and balance the workload across zones. The task of the next model is order-batching and sequencing – two concepts are presented that meet different assumptions. The results of the exemplary tasks solved with the use of the proposed MILP models show that the total picking time of a set of orders can be reduced by about 35-45% in comparison with random policies. The paper presents an equation for the lower bound of a makespan. Recommendations about the number of zones that guarantee the required system efficiency are also introduced.
    Źródło:
    Operations Research and Decisions; 2023, 33, 3; 141--158
    2081-8858
    2391-6060
    Pojawia się w:
    Operations Research and Decisions
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza i usprawnienie logistycznego systemu magazynowego poprzez zastosowanie składowania typowych jednostek paletowych w regale z odzyskiem energii
    Analysis and improvement of the logistic storage system by means of storing typical pallet units in a rack with energy recovery
    Autorzy:
    Goleń, Krystian
    Powiązania:
    https://bibliotekanauki.pl/articles/24200455.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    odzysk energii
    układ odzysku energii
    regał przepływowy
    regał grawitacyjny
    przemiennik częstotliwości
    składowanie
    energy recovery
    energy recovery system
    flow rack
    gravity flow rack
    frequency converter
    storage
    Opis:
    W artykule omówiono zagadnienia związane z zastosowaniem regału przepływowego z odzyskiem energii w procesie składowania typowych jednostek paletowych. Opracowano założenia układu, model obliczeniowy i przeprowadzono analizę przemian energii jednostki ładunkowej podczas procesu składowania. Na podstawie otrzymanych wyników zaproponowano kompletny moduł układu pozwalający na odzyskanie i ponowne wykorzystanie części energii jednostki ładunkowej. Dla zaproponowanego rozwiązania przeprowadzono analizę jego odpowiedniego umiejscowienia. Oszacowano także sprawność zaproponowanego układu i przeanalizowano jego opłacalność ekonomiczną.
    The paper describes the possibility of recovering a part of a pallet’s kinetic energy during storage on a flow rack. In order to develop the solution, it was necessary to make assumptions, create a computational model and analyse energy transformations during the storage process. The proposed solution, based on the results of the model and analysis, is able to recover energy from flow racks and transform it into a usable form. The paper analyses an appropriate localisation for the energy recovery system, describes its efficiency and defines its cost effectiveness.
    Źródło:
    Journal of TransLogistics; 2022, 8, 1; 41-60
    2450-5870
    Pojawia się w:
    Journal of TransLogistics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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