HIERARCHICAL ENERGY MANAGEMENT FOR COMMUNITY MICROGRIDS WITH INTEGRATION OF SECOND-LIFE BATTERY ENERGY STORAGE SYSTEMS AND PHOTOVOLTAIC SOLAR ENERGY

    公开(公告)号:US20230070151A1

    公开(公告)日:2023-03-09

    申请号:US18056170

    申请日:2022-11-16

    Abstract: A second-life battery-based super multi-objective energy management method for a smart community microgrid, including: establishing a residual life decay model of the second-life battery based on a residual charge and discharge cycle number; establishing a super multi-objective energy management model based on residential energy consumption costs, the residual life decay model of the second-life battery, residential electricity consumption behaviors, and impacts of residential community load on an electricity distribution system; recording state information of the second-life battery in the smart community; collecting residential electricity consumption information in the smart community, and predicting a renewable energy output value of the smart community; and solving the super multi-objective energy management model by using a NSGA-III algorithm combining with the state information of the second-life battery and the renewable energy output value.

    Safe operation method for voltage reduction arc suppression of ground fault phase of non-effective ground system

    公开(公告)号:US11368017B2

    公开(公告)日:2022-06-21

    申请号:US16616975

    申请日:2018-07-04

    Inventor: Xiangjun Zeng

    Abstract: The present invention discloses a safe operation method for voltage reduction arc suppression of a ground fault phase of a non-effective ground system, for use in ground fault safety operation of a neutral point non-effective ground generator or distribution network. When a single-phase ground fault occurs, an external voltage source is applied at a non-effective ground system side between a bus and the ground, or between a line and the ground, or between a neutral point and the ground, or between a shunting tap of a non-effective ground system side winding of a transformer and the ground, to reduce the fault phase voltage to be lower than the continuous burning voltage of a ground arc, thereby meeting the requirements of long-term non-stop safe operation. The operation means and control method effectively prevent power outages, and improve the reliability and security of power supply.

    Large-span bulk material conveying system

    公开(公告)号:US10994935B1

    公开(公告)日:2021-05-04

    申请号:US17139563

    申请日:2020-12-31

    Abstract: Disclosed a large-span bulk material conveying system, including a folding arm conveyor and a dike-striding elevation-type feeding conveying device. The folding arm conveyor is mainly composed of an undercarriage mounted on the ground of a stockyard, a tower body mounted on the undercarriage and provided with a gyration apparatus and a hopper, a balance arm provided with a balance trolley, a conveying arm provided with a portal frame I, a portal frame II and an unloading trolley, a tower top and other main components, wherein the balance arm, the conveying arm and the tower top are mounted on the tower body. The folding arm conveyor can rotate horizontally, and the conveying arm can be folded and retracted by controlling the wire rope by the windlass, so that the folding arm conveyor can be prevented from colliding with other devices or buildings during the rotation.

    Anti-agglomeration device using ultrasonic waves for a nanofluid

    公开(公告)号:US10994249B1

    公开(公告)日:2021-05-04

    申请号:US17088058

    申请日:2020-11-03

    Abstract: An anti-agglomeration device for a nanofluid includes a support module, a motion module, a photoacoustic conversion module and a control module. The support module includes a frame and screws and is configured to support the photoacoustic conversion module and the motion module. The photoacoustic conversion module includes a nanosecond laser, a first clamp, a lens, a silica optical fiber, a second clamp, gold nanoparticles and a container and is configured to realize photoacoustic conversion to generate ultrasonic waves. The motion module includes a servo motor, a dovetailed rail, a guide screw, a fixed plate, a slider and a deep groove ball bearing. The motion module is configured to support the photoacoustic conversion module and realize the combined motions of the photoacoustic conversion module. The control module includes a support plate and a CCD camera and is configured to control the motion module in real time.

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