知搜-全球专利检索

  1. Login
  2. Sign Up

Search Results

5 records (took 0.011 seconds)

    Clock synchronization for line differential protection
    2.
    发明授权
    Clock synchronization for line differential protection 有权

    公开(公告)号：US09614577B2

    公开(公告)日：2017-04-04

    申请号：US13949442

    申请日：2013-07-24

    Applicant: ABB RESEARCH LTD

    Inventor： Dacfey Dzung

    IPC: H02H3/28 ,  G06F11/16 ,  H04B1/7073 ,  H02J3/08 ,  H04J3/06

    CPC classification number: H04B1/7073 ,  G06F11/1658 ,  H02H3/28 ,  H02J3/08 ,  H04J3/0667

    Abstract: A method and arrangement are provided for time synchronization between two geographically separated stationary clocks, such as first and second clocks located respectively at first and second ends of an AC power line. A first representation of an oscillating power line quantity is produced by measuring or recording the power line quantity at the first end of the power line, and time-stamping the first representation by the first clock. A second representation of the same oscillating power line quantity is produced by measuring the power line quantity at the second end of the power line, and time-stamping the second representation by the second clock. The first and second representations are compared to determine a clock offset between the first and second clocks. Based on the comparison, one or both of the first and second clocks are adjusted to reduce the determined clock offset.

    Link selection in lossy communication networks
    4.
    发明授权
    Link selection in lossy communication networks 有权

    公开(公告)号：US09769728B2

    公开(公告)日：2017-09-19

    申请号：US14633619

    申请日：2015-02-27

    Applicant: ABB RESEARCH LTD

    Inventor： Dacfey Dzung ,  Yvonne-Anne Pignolet

    IPC: H04L12/707 ,  H04W40/12 ,  H04W76/02 ,  H04L12/721

    CPC classification number: H04W40/12 ,  H04L45/124 ,  H04L45/22 ,  H04W76/10 ,  Y02D70/22 ,  Y02D70/34

    Abstract: The present disclosure encompasses establishing and maintaining a routing protocol based on a measured link metric p, such as for a smart grid communication system. A link between a first node such as a router A and a neighbouring second node B of a communication path from a source to a destination in a packet oriented communication network is selected wherein the two nodes are connected via first and second communication links. An updated link metric p(t+1) at a point in time t+1 of the first communication link is determined. The first or the second communication link is selected for transmitting a further packet from node A to node B by comparing the updated link metric p(t+1) to a threshold pthr.

    COMMUNICATION SYSTEM FOR POWER ELECTRONIC CONVERTERS
    5.
    发明申请
    COMMUNICATION SYSTEM FOR POWER ELECTRONIC CONVERTERS 审中-公开
    电力电子转换器通信系统

    公开(公告)号：US20140050488A1

    公开(公告)日：2014-02-20

    申请号：US14057628

    申请日：2013-10-18

    Applicant: ABB RESEARCH LTD

    Inventor： Dacfey Dzung ,  Didier Cottet ,  Anne Vallestad ,  Lars Kalland

    IPC: H04B10/11

    CPC classification number: H04B10/11 ,  H02M2001/0003

    Abstract: Exemplary embodiments of a communication system for a power electronic converter with a plurality of converter modules includes controllable power semiconductor switches and individually mountable onto a converter cabinet or frame. The communication system includes unguided transmission of optical signals between optical elements arranged on a converter module and on the converter cabinet, respectively. The communication system provides a free-space optical signal transmission between two distinct parts of the converter that combines the flexibility offered by radio transmission and the data rate and reliability of optical communication, while at the same time avoiding the complex and expensive cabling of optical fiber solutions.

    Abstract translation: 具有多个转换器模块的电力电子转换器的通信系统的示例性实施例包括可控功率半导体开关，并且可单独安装到转换器柜或框架上。 通信系统包括分别在布置在转换器模块和转换器柜上的光学元件之间的光信号的非指导传输。 通信系统在转换器的两个不同部分之间提供自由空间光信号传输，其将无线电传输提供的灵活性与光通信的数据速率和可靠性相结合，同时避免光纤的复杂和昂贵的布线 解决方案

Patent Agency Ranking