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Wyszukujesz frazę "topology" wg kryterium: Temat

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    Wyświetlanie 1-8 z 8
    Tytuł:
    Boosting resonant switched-capacitor voltage tripler
    Autorzy:
    Chojowski, Maciej
    Sosnowski, Robert
    Baszyński, Marcin
    Powiązania:
    https://bibliotekanauki.pl/articles/24202737.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    boost topology
    DC–DC converters
    switched capacitor converter
    Opis:
    This elaboration presents the concept of a unidirectional DC–DC switchedcapacitor converter operating as a voltage tripler. The system consists of two resonant cells with switched capacitors and chokes. This proposed converter topology achieves low voltages on semiconductor switches (diodes and transistors) compared to the classic SC series-parallel converter or the boost topology. The output voltage on the capacitors is reduced in the proposed converter because it is divided into two series-connected capacitors with asymmetric distribution. The presented results describe the analytical description of the system operation and the analytical equation for semiconductor currents. A simulation and experimental results have been performed. The system efficiency and three voltage gain values were measured in the experimental setup. The efficiency measured was also compared with the analytical determination curve for loss analysis and further converter optimization.
    Źródło:
    Archives of Electrical Engineering; 2023, 72, 2; 373--389
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A discrete variable based methodology for topology optimization considering spatially uneven manufacturing errors
    Autorzy:
    Xia, Meng
    Li, Jing
    Powiązania:
    https://bibliotekanauki.pl/articles/27309953.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    interval field
    manufacturing errors
    morphological operations
    topology optimization
    Opis:
    Manufacturing errors (MEs) are unavoidable in product fabrication. The omnipresence of manufacturing errors (MEs) in product engineering necessitates the development of robust optimization methodologies. In this research, a novel approach based on the morphological operations and interval field (MOIF) theory is proposed to address MEs in the discrete-variable-based topology optimization procedures. On the basis of a methodology for deterministic topology optimization (TO) based on the Min-Cut, MOIF introduces morphological operations to generate geometrical variations, while the dimension of the structuring element is dynamically set by the interval field function’s output. The effectiveness of the proposed approach as a powerful tool for accounting for spatially uneven ME in the TOs has been demonstrated.
    Źródło:
    Archives of Electrical Engineering; 2023, 72, 4; 1121--1133
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A power electronics controlled current source based on a double-converter topology
    Autorzy:
    Gwóźdź, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/141165.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    controlled source
    converter control
    converter topology
    PWM
    simulation model
    Opis:
    The paper presents a conception of power electronics voltage controlled current source (VCCS) which is able much more precise mapping of its an output current in a reference signal, compared to a typical converter solution. It can be achieved by means of such interconnection of two separate converters that one of them corrects a total output current towards a reference signal. An output power of auxiliary converter is much smaller than an output power of main one. Thanks to continuous work of this converter also pulse modulation components in this current are minimized. These benefits are paid for by a relatively small increase in the complexity and the cost of the system. This conception of a converter has been called the double-converter topology (DCT). In the author opinion presented solution of the system can find application in many power electronics equipment and, therefore, will be developed. In the paper DCT basics, simulation experiments, and possible practical arrangement of the DCT are presented.
    Źródło:
    Archives of Electrical Engineering; 2014, 63, 3; 335-344
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on topology of a novel three-phase four-leg fault-tolerant NPC inverter
    Autorzy:
    Zhang, Baoge
    Ping, Shanyan
    Long, Yyi
    Jiao, Yyuemin
    Wu, Bboxiang
    Powiązania:
    https://bibliotekanauki.pl/articles/2086722.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fault tolerant operation
    midpoint potential equilibrium
    NPC inverter
    topology reconstruction
    Opis:
    Diode neutral point clamped (NPC) three-level converters have been widely used in recent years. Aiming at the problems of the high device failure rate and unstable neutral point potential of NPC three-level converters, an NPC three-level circuit with fourth bridge arm redundancy is proposed based on the traditional NPC three-level converter. The redundant fourth bridge arm is used to realize the function of stabilizing voltage when there is no fault and replacing the fault half-bridge arm to maintain the continuous operation of the converter when there is a fault. By analyzing the working principle of space vector pulse width modulation (SVPWM) and the power loss of the switch, it is of particular significance to the design and control of NPC three-level converters in the future. Matlab/Simulink verifies the feasibility of the fault-tolerant circuit structure.
    Źródło:
    Archives of Electrical Engineering; 2022, 71, 2; 489--506
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Topology analysis and parameter design of three-level multi-input DC/DC converter based on multi-source access
    Autorzy:
    Tian, Jingjing
    Qu, Jiaoping
    Zhao, Feng
    Chen, Xiaoqiang
    Wang, Ying
    Gan, Yang
    Powiązania:
    https://bibliotekanauki.pl/articles/2202547.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    multi-input converter
    parameter design
    power sharing
    three-level
    topology analysis
    Opis:
    A three-level multi-input DC/DC converter is proposed to solve the problems of complex interface circuit structure and high economic cost for multi-source access to the joint power supply distribution system. In this structure, multiple dc sources are integrated into a three-level DC/DC converter. In comparison with the two-stage counterpart, two active switches and boost diodes are eliminated, while two blocking diodes are added to block the reverse current from the dc-link capacitors. In addition, when the input inductors work in the discontinuous conduction mode, power sharing among different input sources can be achieved by properly selecting the inductance value. The working principle of the converter is analyzed by introducing nine working modes in detail and deriving the steady-state relationship expressions. The parameter range of the element is determined and the design process of a group of dynamic parameter values is shown. Finally, the power electronics real-time simulation platform is built based on StarSim HIL and the corresponding experimental waveforms are given to verify the topology and analysis.
    Źródło:
    Archives of Electrical Engineering; 2023, 72, 1; 59--80
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Overview on topology identification technologies for a low-voltage distribution network
    Autorzy:
    Haotian, Ge
    Jiuming, Zhong
    Powiązania:
    https://bibliotekanauki.pl/articles/27309955.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    data driven method
    low-voltage distribution network
    signal injection method
    topology identification
    Opis:
    The topology identification of low-voltage distribution networks is an important foundation for the intelligence of low-voltage distribution networks. Its accuracy fundamentally determines the effectiveness of functions such as power system state estimation, operational control, optimization planning, and intelligent electricity consumption. The low-voltage distribution network is composed of transformers, lines, and end users. The key task of topology identification is to distinguish the connection relationship between distribution transformers, low-voltage lines, and phase sequence with end users, which can be divided into transformer user relationship, line user relationship, and phase user relationship. At present, the main methods of low-voltage network topology identification can be divided into signal injection method and data analysis method. The signal injection method requires a large number of additional terminal devices and is difficult to promote. The data analysis method combines the characteristics of switch state, voltage, current, electrical energy, and other data to perform topology analysis. The commonly used methods include correlation analysis and feature learning. Finally, typical problems that urgently need to be solved in topology recognition and representation were proposed, providing a reference for the research and development of low-voltage distribution network topology automatic recognition technology.
    Źródło:
    Archives of Electrical Engineering; 2023, 72, 4; 1017--1034
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Topology identification of low voltage distribution network based on current injection method
    Autorzy:
    Ge, Haotian
    Xu, Bingyin
    Chen, Wengyin
    Zhang, Xinhui
    Bi, Yongjian
    Powiązania:
    https://bibliotekanauki.pl/articles/1841282.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    current injection
    low-voltage distribution network
    topology identification
    prąd wtrysku
    sieć dystrybucyjna niskiego napięcia
    identyfikacja topologii
    Opis:
    The structure of the low-voltage distribution network often changes. The change of topology will affect fault detection, fault location, line loss calculation, etc. It leads to fault detection error, inaccurate positioning and abnormal line loss calculation. This paper presents a new method to automatically identify the topology of a low-voltage power grid by using the injection current signal. When the disturbance current signal is injected into the low-voltage line, the current upstream of the injection point will change, and the current downstream of the injection point will not be affected. It is proved theoretically by using the superposition principle. With this method, the disturbance current signal can be injected into the line in turn, and the topology can be identified by observing the change of the current in line. The correctness of the method is proved by Matlab simulation and laboratory verification.
    Źródło:
    Archives of Electrical Engineering; 2021, 70, 2; 297-306
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Low-voltage overhead lines topology identification method based on high-frequency signal injection
    Autorzy:
    Ge, Haotian
    Xu, Bingyin
    Zhang, Xinhui
    Bi, Yongjian
    Powiązania:
    https://bibliotekanauki.pl/articles/1955180.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    high-frequency signal injection
    low voltage overhead lines
    topology identification
    wtrysk sygnału wysokiej częstotliwości
    linie napowietrzne niskiego napięcia
    identyfikacja topologii
    Opis:
    The topology of low-voltage distribution systems changes with the load or the on/off position of the circuit switch. This will affect power flows, losses, and so on. This paper submits a new method to identify the topology of a low-voltage feeder using the injection high-frequency signal. An inductor can block the high-frequency signal. It can change the propagation direction of the injected high-frequency signal to make it propagate unidirectionally along the low-voltage feeder. By injecting a 5 MHz sinusoidal signal from the upstream direction of the low-voltage feeder, all the line segments and devices on the feeder can be identified. The wavelength of the high-frequency signal is short. The wavelength of the 5 MHz signal is 60 meters. Through the delay of different observation points on the feeder, the length of the line section can be roughly calculated. The high- frequency signal has an obvious reflection on the feeder. Using this feature, we can roughly calculate the length of the line segment. The correctness of the method is demonstrated by MATLAB simulation verification.
    Źródło:
    Archives of Electrical Engineering; 2021, 70, 4; 791-800
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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