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公开(公告)号：US20230132007A1
公开(公告)日：2023-04-27
申请号：US17758528
申请日：2020-01-10
申请人： ABB Schweiz AG
发明人： Bertil Berggren , Ritwik Majumder , Lidong Zhang
IPC分类号： H02J3/06
摘要： A method for transfer of power between medium voltage, MV, feeders via a MV direct current, MVDC, link in a power distribution network is presented. The method is performed in a controller in the power distribution network and includes setting an iteration step value for each of a set of power reference quantities of the MVDC link, and setting an initial value of each of the set of power reference quantities, iteratively changing values of each of the set of power reference quantities, and selecting one changed value of the set of power reference quantities by: changing a present value of each of the set of power reference quantities, one at a time, with the set iteration step value, respectively, into a new value, and measuring a total active power at a substation of the power distribution network for each of the new value, one at a time, and selecting the new value of the one of the set of power reference quantities that provides the lowest measured total active power at the substation, wherein a next iteration is performed with the selected new value as present value for the one of the set of power reference quantities and with the present value for the other of the set of power reference quantities. A controller for transfer of power between MV feeders via a MVDC link in a power distribution network is also presented.
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公开(公告)号：US11594889B2
公开(公告)日：2023-02-28
申请号：US17043731
申请日：2018-11-02
发明人： Hongbo Li , Zhixue Zhang , Zihao Huang , Yilong Duan , Wenguang Luo , Wenqing Mei
摘要： Disclosed is an optimized energy interconnection system for an urban railway train in the technical field of urban railway transportation power supply, for addressing the technical problem that distribution of regenerative braking energy flows cannot be accurately determined. The system includes a DC intermediate bus and a multi-port flow controllable energy router. The multi-port flow controllable energy router can comprehensively control a source and a load connected in parallel on the DC intermediate bus and thus can accurately determine the distribution of regenerative braking energy flows, thereby forming a well-developed system for evaluating usage of the braking energy.
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公开(公告)号：US11588331B2
公开(公告)日：2023-02-21
申请号：US16987864
申请日：2020-08-07
申请人： STATE GRID JIANGSU ELECTRIC POWER CO., LTD. , STATE GRID SUZHOU POWER SUPPLY COMPANY , STATE GRID JIANGSU ELECTRIC POWER CO., LTD. MARKETING CENTER
发明人： Yunfeng Cai , Chong Tong , Ning Wang , Yang Xu , Huiwen Lu , Kang Dai , Wei Yin , Bowen Wu , Liang Wang , Jianqiang Miao
摘要： Provided are a load transfer method and system in thunder and lightning weather. The method includes: detecting lightning and predicting a position and time of a lightning strike to obtain a lightning prediction result; determining a transmission line possibly struck by lightning in a power grid according to the lightning prediction result; determining a load transfer scheme; and before the lightning occurs, transferring at least part of loads on the transmission line possibly struck by lightning according to the load transfer scheme.
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公开(公告)号：US11573545B2
公开(公告)日：2023-02-07
申请号：US16777518
申请日：2020-01-30
IPC分类号： G05B19/042 , G06F3/0488 , G06F3/048 , H02J3/06 , H02J50/00
摘要： A system, method and apparatus for an interactive dynamic interface for wireless distributed capacitor control that comprises a touchscreen display that eliminates the conventional dials and switches that are part of a conventional control, and with these efficiencies can locally, remotely or autonomously implement “personality” settings for the capacitor control that speeds and simplifies custom configurations and recovery in relation to user, electrical and environmental input that meets certain operating criteria, including after a shut-down event, thereby improving the of the capacitor control system to function more appropriately, effectively, and efficiently under a greater range of parameters.
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公开(公告)号：US20220405830A1
公开(公告)日：2022-12-22
申请号：US17869652
申请日：2022-07-20
申请人： eBay Inc.
发明人： Dane Glasgow
摘要： In an example embodiment, an item listing process is run in an item listing application. Upon reaching a specified point in the item listing process, a camera application on the user device is triggered (or the camera directly accessed by the item listing application) to enable a user to capture images using the camera, wherein the triggering includes providing an overlay informing the user as to an angle at which to capture images from the camera.
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公开(公告)号：US11509137B2
公开(公告)日：2022-11-22
申请号：US17083223
申请日：2020-10-28
申请人： Enphase Energy, Inc.
摘要： A method and apparatus for secondary control in a power network. In one embodiment, the method comprises determining a frequency area controller error (ACE) equation for an area and a voltage ACE for the area; decomposing the frequency ACE equation and the voltage ACE equation to generate a first set of symmetric sequences for the frequency ACE equation and a second set of symmetric sequences for the voltage ACE equation, respectively, wherein the first and second sets of symmetric sequences represent positive and negative sequences; and implementing, by an area controller for the area, secondary control on each sequence in the first and second sets of symmetric sequences separately.
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公开(公告)号：US11355937B2
公开(公告)日：2022-06-07
申请号：US17028445
申请日：2020-09-22
申请人： EnergyHub, Inc.
摘要： Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for determining controls to be applied to a population of devices. In one aspect, a method comprises: determining a plurality of simulated load curves, wherein each simulated load curve simulates load generated by a respective device from a population of devices based on application of a respective control from a set of controls; adjusting values of a plurality of weights during a plurality of optimization iterations using an optimization technique to optimize a loss function, wherein each weight corresponds to a respective simulated load curve, wherein the loss function measures: a sparsity of the values of the plurality of weights, and an error between: (i) an aggregate load curve that is defined by combining the simulated load curves in accordance with the values of the plurality of weights, and (ii) a target load curve.
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公开(公告)号：US20220173596A1
公开(公告)日：2022-06-02
申请号：US17538111
申请日：2021-11-30
发明人： Isabel BLAAK , Johannes BROMBACH
摘要： A method for controlling an electrical distribution grid, comprising the following steps: determining at least one variable which describes a state of the electrical distribution grid; combining a plurality of electrical installations, in particular a plurality of regenerative generating units, of the electrical distribution grid to form a virtual power plant, in particular taking into consideration the variable; establishing a control area within the electrical distribution grid for the virtual power plant; establishing a control unit of an electrical installation of the virtual power plant as main control unit; controlling the control area using the main control unit of the virtual power plant.
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公开(公告)号：US11159018B2
公开(公告)日：2021-10-26
申请号：US16348190
申请日：2018-09-29
申请人： SHANDONG UNIVERSITY
发明人： Yutian Liu , Runjia Sun
IPC分类号： H02J3/06 , G05B19/042 , G06N3/08
摘要： A method and system for online decision making of generator start-up, determining the lines to be restored step by step based on the real-time power system data to guide the initial stage. The black-start unit is determined, and the units waiting to be restored are selected from all units. The training set including labeled samples to establish a value network. During generator start-up, the blackout area is judged, the state of power system is identified, the availability of equipment is judged, and the characteristics of generators are collected. The total generation capability is used as search objective for Monte Carlo tree search. Based on the value network, Monte Carlo is applied to search the next line to be restored during generator start-up. Parallel computation adopted to check the constraints for the restoration of alternative lines. The results of Monte Carlo are summarized to determine the line to be restored next.
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公开(公告)号：US20210296893A1
公开(公告)日：2021-09-23
申请号：US17340664
申请日：2021-06-07
申请人： LANCIUM LLC
摘要： Systems include one or more critical datacenter connected to behind-the-meter flexible datacenters. The critical datacenter is powered by grid power and not necessarily collocated with the flexboxes, which are powered “behind the meter.” When a computational operation to be performed at the critical datacenter is identified and determined that it can be performed at a lower cost at a flexible datacenter, the computational operation is instead routed to the flexible datacenters for performance. The critical datacenter and flexible datacenters preferably shared a dedicated communication pathway to enable high-bandwidth, low-latency, secure data transmissions.
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