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    Wyświetlanie 1-4 z 4
    Tytuł:
    Energy Router for Emergency Energy Supply in Urban Cities: A Review
    Autorzy:
    Nie, Yu
    Xu, Hui
    Hu, Yihua
    Ye, Xianming
    Powiązania:
    https://bibliotekanauki.pl/articles/2175929.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    emergency electric power source
    emergency power supply method
    energy router
    Opis:
    The current emergency power supply (EPS) measures are not perfect and standardised in response to large-scale power failures, such as city-wide ones. This review paper focuses on reasonably using the emergency electric power source to supply power in case of an abnormal urban power grid, to ensure the regular operation of urban electrical equipment and the daily life of the people. This study first introduces the different kinds of main emergency electric power sources and analyses their advantages and disadvantages. The battery of an electric vehicle as a new potential emergency power source is introduced that can also avoid the loss caused by unexpected power failure. Finally, three different EPS methods are explained in detail for different emergency occasions. Among them, the energy router is reviewed comprehensively considering it is the most potential emergency power distribution approach in the future because of its various applications.
    Źródło:
    Power Electronics and Drives; 2022, 7, 42; 246--266
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bidirectional DC–AC Converter-Based Communication Solution for Microgrid
    Autorzy:
    Zhang, Yixuan
    Ni, Kai
    Wang, Yangang
    Hu, Yihua
    Powiązania:
    https://bibliotekanauki.pl/articles/1193849.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    bidirectional DC-AC converter
    frequency shift keying
    MATLAB simulation
    microgrid
    two-way communication
    Opis:
    The communication system of a microgrid can transfer the information of electricity price, power consumption and so on between users and the control centre. This capability is of great significance to improve the efficiency and sustainability of power facilities. In this paper, a bidirectional DC–AC converter topology is proposed to achieve the composite transmission of power and signals in microgrids. Since the transmitted signals are modulated by power switches of converters and integrated into the currents, the cost of signal couplers can be saved and the circuit structure can be simplified. In order to verify the feasibility of the proposed method, a simulation model of the proposed converter is implemented in MATLAB/Simulink. With the power supply frequency of 50 Hz, when the converter operates in the inverter mode and rectifier mode, the data transmission rate can reach 120 bit/s and 48 bit/s, respectively.
    Źródło:
    Power Electronics and Drives; 2020, 5, 40; 177-188
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Laser Power Transmission and Its Application in Laser-Powered Electrical Motor Drive: A Review
    Autorzy:
    Liu, Hongzuo
    Zhang, Yixuan
    Hu, Yihua
    Tse, Zion
    Wu, Jing
    Powiązania:
    https://bibliotekanauki.pl/articles/1955981.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    laser power transmission
    photovoltaic material
    laser diode
    optical fibre power transmission
    atmosphere transmission
    Opis:
    Laser power transmission (LPT) is considered a potentially efficient way for power delivery, especially in long-distance wireless applications and harsh hazardous environmental conditions. In contrast to other wireless power transmission (WPT) methods, LPT has many advantages such as lower device size, focused transmitting direction and high power density. With the development of technology, LPT has been widely adopted in several fields. In conservative industries, the utilisation of LPT can resolve the limitation problem in a wired connection. The adverse influence of electromagnetic interference (EMI) concerning application and high-temperature fields can be reduced. This paper will give a simple review of LPT and demonstrate the basic concept of a photoelectric emitter, transmission channel and receiver material. Based on the recent research about diode laser beam combining technology and high-efficiency multi-junction photovoltaics (PV) materials, the advised LPT devices for simple application as laser power motor will be simply discussed.
    Źródło:
    Power Electronics and Drives; 2021, 6, 41; 167-184
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Bidirectional Buck-Boost Converter-Based Switching Ripple Communication Strategy for Intelligent Street Lighting Systems
    Autorzy:
    Zhang, Yixuan
    Hu, Yihua
    Tse, Zion
    Liu, Yuwei
    Deng, Jiamei
    Xu, Hui
    Wang, Yangang
    Li, Wei
    Powiązania:
    https://bibliotekanauki.pl/articles/1955998.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    bidirectional switching ripple communication
    buck-boost converter
    intelligent street lighting system
    pulse width modulation
    smart city
    Opis:
    The light-emitting diode (LED) is an essential component of intelligent street lighting (ISL) systems. An efficient ISL system can not only reduce power consumption by planning LED illuminating time but also reduce maintenance costs through a high degree of automation. In this paper, a buck-boost converter is used to realise composite transmission of power and signals for an ISL system. The power is modulated by the pulse width modulation (PWM) approach, and the switching ripple generated in the PWM process is utilised as the carrier of the signals transmitted between the remote-control centre and the slave nodes. Moreover, the proposed model involves a ‘request to send (RTS)/confirm to send (CTS)’ mechanism to avoid signal conflicts. Compared with the conventional power line communication (PLC) approach, the proposed transmission scheme has the advantages of simple circuit structure and simple system wiring. Additionally, a simulation model built in MATLAB/Simulink proves the designed transmission method has strong anti-noise ability.
    Źródło:
    Power Electronics and Drives; 2021, 6, 41; 260-275
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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