公开(公告)号：US20240339836A1

公开(公告)日：2024-10-10

申请号：US18298040

申请日：2023-04-10

Applicant: Vermillion Power Technologies Inc.

Inventor： Raymond Kenneth Orr ,  Kelly Hall ,  Philip Craine

IPC: H02J3/06 ,  H02J3/00

CPC classification number: H02J3/06 ,  H02J3/0012 ,  H02J3/381

Abstract: The present disclosure relates to prevention of reverse power flow into an electrical utility grid. An electrical circuit connector is for connection to an electrical circuit that includes one or more electrical loads and one or more electrical power sources to provide electrical power to the electrical load(s). An electrical grid connector is for connection to an electrical utility grid. A connection state between the electrical grid connector and the electrical circuit connector is controlled based on respective voltages, at the electrical circuit connector and at the electrical grid connector, and a state of power flow between the electrical grid connector and the electrical circuit connector.

公开(公告)号：US20240213776A1

公开(公告)日：2024-06-27

申请号：US18538149

申请日：2023-12-13

Applicant: STATE GRID ZHEJIANG ELECTRIC POWER CO., LTD ,  Zhejiang University

Inventor： Lei CHEN ,  Shufeng DONG ,  Qiang YANG ,  Jun LYU ,  Weiwei XU ,  Yihui SUN ,  Chongyou XU ,  Jingen SONG ,  Weifeng XU ,  Jun HUANG

IPC: H02J3/06

CPC classification number: H02J3/06 ,  H02J2203/20

Abstract: A method and device for optimal power flow calculation in power systems based on generalized Nash equilibrium are disclosed. The method comprises: determining first optimal power flow model corresponding to distribution network and second optimal power flow model corresponding to each microgrid; constructing a third optimal power flow model based on the first optimal power flow model, each second optimal power flow model and boundary coupling constraint condition; determining generalized Nash equilibrium solution corresponding to the third optimal power flow model; determining generalized Nash equilibrium constraint condition corresponding to collaborative objective function and the Nash equilibrium solution; determining fourth optimal power flow model corresponding to the collaborative objective function, with constraint condition including the generalized Nash equilibrium constraint condition; determining Pareto optimal solution corresponding to the fourth optimal power flow model to determine an optimal power flow. Accordingly, effectiveness of optimization management is improved.

公开(公告)号：US20230420986A1

公开(公告)日：2023-12-28

申请号：US18465789

申请日：2023-09-12

Applicant: Smart Wires Inc.

Inventor： Wooyoung Choi ,  Adeel Ahmad Khan ,  Haroon Inam

IPC: H02J13/00 ,  G05B13/02 ,  H02J3/18 ,  H02J3/00 ,  H02J3/20

CPC classification number: H02J13/00034 ,  G05B13/0255 ,  H02J3/1835 ,  H02J3/00 ,  H02J13/00004 ,  H02J13/00016 ,  H02J3/1814 ,  H02J3/20 ,  H02J3/06

Abstract: In an impedance injection module in which multiple converter units are placed in series to realize a high level of impedance injection, switches, preferably vacuum interrupters, are connected to short the input and the output terminals of each individual unit. Unlike the fault-protecting switch across the entire module, these switches at the individual converter unit level serve several purposes, overload and surge protection of a unit, insertion loss minimization of an idle unit when the required impedance injection is small, and electrically removing a defective injection unit from the power flow to increase the overall reliability of the impedance injection module in the face of the failure of one unit or a few units. For more rapid response, particularly in response to faults, the vacuum interrupter at the unit level may be accompanied by an SCR switch in parallel with it.

公开(公告)号：US11843247B2

公开(公告)日：2023-12-12

申请号：US17445802

申请日：2021-08-24

Applicant: Smart Wires Inc.

Inventor： Antonio Ginart ,  Michael T. Garrison Stuber ,  Haroon Inam ,  Shreesha Adiga Manoor

IPC: H02J13/00 ,  G05B13/02 ,  H02J3/18 ,  H02J3/00 ,  H02J3/20 ,  H02J3/06 ,  H02J3/24

CPC classification number: H02J13/00034 ,  G05B13/0255 ,  H02J3/00 ,  H02J3/1814 ,  H02J3/1835 ,  H02J3/20 ,  H02J13/00004 ,  H02J13/00016 ,  H02J3/06 ,  H02J3/242

Abstract: In prior art grid systems, power-line control is done by substation based large systems that use high-voltage (HV) circuits to get injectable impedance waveforms that can create oscillations on the HV power lines. Intelligent impedance injection modules (IIMs) are currently being proposed for interactive power line control and line balancing. These IIMs distributed over the high-voltage lines or installed on mobile platforms and connected to the HV power lines locally generate and inject waveforms in an intelligent fashion to provide interactive response capability to commands from utility for power line control. These IIMs typically comprise a plurality of impedance-injection units (IIUs) that are transformer-less flexible alternating current transmission systems interconnected in a series-parallel connection and output pulses that are additive and time synchronized to generate appropriate waveforms that when injected into HV transmission lines are able to accomplish the desired response and provide interactive power flow control.

公开(公告)号：US20230385919A1

公开(公告)日：2023-11-30

申请号：US18232189

申请日：2023-08-09

Applicant: eBay Inc.

Inventor： Dane Glasgow

IPC: G06Q30/0601 ,  H02B1/48 ,  H01R9/24 ,  H05K7/14 ,  H01R33/94 ,  H04N23/80 ,  H04N13/106 ,  H04N23/60 ,  H02J3/06

CPC classification number: G06Q30/0643 ,  H02B1/48 ,  H01R9/24 ,  H05K7/1492 ,  H02J3/06 ,  H04N23/80 ,  G06Q30/0601 ,  H04N13/106 ,  H04N23/64 ,  H01R33/94

Abstract: 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.

公开(公告)号：US11763377B2

公开(公告)日：2023-09-19

申请号：US17869652

申请日：2022-07-20

Applicant: eBay Inc.

Inventor： Dane Glasgow

IPC: G06Q30/06 ,  H04N13/106 ,  H04N5/232 ,  H01R9/24 ,  H01R33/94 ,  H02B1/48 ,  H02J3/06 ,  H05K7/14 ,  G06Q30/0601 ,  H04N23/60 ,  H04N23/80

CPC classification number: G06Q30/0643 ,  G06Q30/0601 ,  H01R9/24 ,  H01R33/94 ,  H02B1/48 ,  H02J3/06 ,  H04N13/106 ,  H04N23/64 ,  H04N23/80 ,  H05K7/1492

Abstract: 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.

公开(公告)号：US20230223755A1

公开(公告)日：2023-07-13

申请号：US18102408

申请日：2023-01-27

Applicant: SINGULARITY ENERGY, INC.

Inventor： Wenbo Shi ,  Xin Chen ,  Na Li

IPC: H02J3/06 ,  H02J3/38 ,  G06Q50/06

CPC classification number: H02J3/06 ,  H02J3/381 ,  G06Q50/06 ,  H02J2203/20 ,  H02J2203/10

Abstract: Method and apparatus configured to receive a plurality of power flow data from at least a grid monitoring device connected to a grid network including a plurality of nodes, generate a power flow allocation for at least a node in the network as a function of the at least a power consumption datum and the at least a generation datum, determine a carbon flow as a function of the power flow allocation and a first set of stored relational rules, generate an objective function of a carbon flow and a second set of stored relational rules, minimize the objective function of a carbon flow as a function of the carbon optimization model and an optimization algorithm, generate a grid modification as a function of the minimization; and modify a grid parameter of the grid network as a function of the grid modification.

公开(公告)号：US10074979B2

公开(公告)日：2018-09-11

申请号：US15122895

申请日：2015-08-26

Applicant: INCHEON UNIVERSITY INDUSTRY ACADEMIC COOPERATION FOUNDATION

Inventor： Hak-Man Kim ,  Hyeong Jun Yoo

IPC: H02J3/06 ,  H02J3/02 ,  G05F1/70 ,  H02J3/38

CPC classification number: H02J3/06 ,  G05F1/70 ,  H02J3/02 ,  H02J3/38 ,  H02J3/382 ,  Y02P80/14

Abstract: The present invention relates to a voltage source converter based DC connection method and a control method for implementing a system for maintaining respective different frequencies (multi-frequencies) by reflecting load quality levels of respective microgrids when multiple stand-alone microgrids are connected to each other in which voltage source converters (VSCs) installed at connection points of the microgrids for effectively controlling respective microgrids having different frequency control ranges present an effective control method based on a concept using normalizing frequencies of unit microgrids to be similarly applied in an islanded operation mode of multiple grid-connected microgrids as well as multiple stand-alone microgrids to avoid the same frequency criterion and enable an economic operation to which the load power quality level of the microgrid is reflected, thereby minimizing a transient to stably operate a microgrid system.

公开(公告)号：US20180175739A1

公开(公告)日：2018-06-21

申请号：US15735204

申请日：2017-01-19

Applicant: NR ELECTRIC CO., LTD ,  NR ENGINEERING CO., LTD

Inventor： Nannan WANG ,  Wenqiang ZHAO ,  Yongping WANG

IPC: H02M5/45 ,  H02J3/36 ,  H02M5/458

CPC classification number: H02M5/4505 ,  H02H7/26 ,  H02J3/06 ,  H02J3/36 ,  H02M5/4585 ,  Y02E60/60

Abstract: Disclosed in the present invention is a hybrid back-to-back direct current transmission system. The system comprises an LCC converter and a VSC converter in a back-to-back connection, and a first changeover switch, a second changeover switch, a third changeover switch and a fourth changeover switch. The first changeover switch is connected to a first alternating current system and the LCC converter; the second changeover switch is connected to the first alternating current system and the VSC converter; the third changeover switch is connected to a second alternating current system and the VSC converter; and the fourth changeover switch is connected to the second alternating current system and the LCC converter. In forward power delivery, the first changeover switch and the third changeover switch are closed; and in reverse power delivery, the second changeover switch and the fourth changeover switch are closed. Thereby, it is ensured that the VSC converter always performs inversion operation in any power direction, so as to avoid the problem of potential commutation failure for the LCC converter when being in inversion operation. Also provided is a fast power flow reversal control method of the hybrid back-to-back direct current transmission system.

公开(公告)号：US09912163B2

公开(公告)日：2018-03-06

申请号：US14649784

申请日：2013-11-19

Applicant: PHILIPS LIGHTING HOLDING B.V.

Inventor： Priya Ranjan Mishra ,  Rakeshbabu Panguloori ,  Arup Dalal ,  Sagar Goel

IPC: H02J3/46 ,  H02J3/00 ,  H02J3/38 ,  H02J1/00 ,  H02J3/06 ,  H02M7/5387

CPC classification number: H02J3/46 ,  H02J1/00 ,  H02J3/00 ,  H02J3/06 ,  H02J3/38 ,  H02J3/383 ,  H02M7/5387 ,  Y02B10/14

Abstract: The present invention relates to a circuit arrangement for mitigating power quality issues. It offers protection to sensitive devices against, for example, voltage sags and swells. The system introduces, for loads connected to an AC power source (e.g. a TV in a home connected to the power grid) a DC power source coupled to a controllable inverter and a controllable switching mechanism. By switching to a series configuration, the DC power source (e.g. a photovoltaic power source) can either draw or supply power in order to mitigate a power quality issue. In normal operation, by switching to a parallel configuration the DC power source can feed the load.