Secured fault detection in a power substation

    公开(公告)号:US10651645B2

    公开(公告)日:2020-05-12

    申请号:US15075845

    申请日:2016-03-21

    申请人: ABB Inc.

    摘要: Systems and methods for fault detection and protection in electric power systems that evaluates electromagnetic transients caused by faults. A fault can be detected using sampled data from a first monitored point in the power system. Detection of fault transients and associated characteristics, including transient direction, can also be extracted through evaluation of sample data from other monitored points in the power system. A monitoring device can evaluate whether to trip a switching device in response to the detection of the fault and based on confirmation of an indication of detection of fault transients at the other monitored points of the power system. The determination of whether to trip or activate the switching device can also be based on other factors, including the timing of receipt of an indication of the detection of the fault transients and/or an evaluation of the characteristics of the detected transients.

    Mobile access node channel selection within a mesh network
    6.
    发明授权
    Mobile access node channel selection within a mesh network 有权
    网状网络内的移动接入节点信道选择

    公开(公告)号:US09014102B2

    公开(公告)日:2015-04-21

    申请号:US11407801

    申请日:2006-04-20

    IPC分类号: H04W4/00 H04W72/02 H04W72/04

    CPC分类号: H04W72/02 H04W72/0406

    摘要: An apparatus and method of a mobile node selecting a transmission channel of a mesh network is disclosed. The method includes the mobile node detecting a quality of routing beacons received over a previously selected transmission channel. If the quality of the routing beacons is below a predetermined threshold, then the mobile node transmits probe requests on each of a plurality of available transmission channels. Responses to the probe request are collected from at least one upstream access nodes over at least one of the available transmission channels. A new transmission channel is selected based upon the responses received over the available transmission channels.

    摘要翻译: 公开了一种选择网状网络的传输信道的移动节点的装置和方法。 该方法包括移动节点检测在先前选择的传输信道上接收的路由信标的质量。 如果路由信标的质量低于预定阈值,则移动节点在多个可用传输信道中的每一个上发送探测请求。 通过至少一个可用传输信道从至少一个上游接入节点收集对探测请求的响应。 基于通过可用传输信道接收的响应来选择新的传输信道。

    OPEN FUSE DETECTION SYSTEM FOR A SOLAR INVERTER
    8.
    发明申请
    OPEN FUSE DETECTION SYSTEM FOR A SOLAR INVERTER 有权
    用于太阳能逆变器的开放式保险丝检测系统

    公开(公告)号:US20140091625A1

    公开(公告)日:2014-04-03

    申请号:US13629749

    申请日:2012-09-28

    申请人: ABB INC.

    IPC分类号: H02J1/00

    摘要: A photovoltaic power circuit is provided and includes a plurality of strings of connected photovoltaic panels operable to generate DC current from solar radiation. Each of the strings is connected to a solar inverter by a pair of fuses. A detection circuit is provided that is operable to detect when one of the fuses opens as a result of a fault, regardless whether the fault is temporary or continuing.

    摘要翻译: 提供光伏电力电路并且包括多个可连接的太阳能电池串,其可操作以从太阳辐射产生DC电流。 每根线通过一对保险丝连接到太阳能逆变器。 提供了一种检测电路,其可操作以检测何时一个保险丝作为故障的结果而打开,而不管故障是临时的还是继续的。

    Transformer enclosure having a drop-down sill gate
    10.
    发明授权
    Transformer enclosure having a drop-down sill gate 有权
    变压器外壳有一个下拉门槛

    公开(公告)号:US08581097B2

    公开(公告)日:2013-11-12

    申请号:US13362471

    申请日:2012-01-31

    IPC分类号: H02G3/14

    CPC分类号: H05K7/14 H01F27/02

    摘要: A transformer enclosure has a hood and sill attached to a tank. The hood is retractable upon hinges connected to the top face of the tank. The sill is attached to the front face of the tank near the base and has a gate that drops down to an expanded position. When the enclosure is in a closed position, the hood and sill meet with the sill gate fully retracted along a tamperproof interface. A tamperproof interface is formed at the side of the enclosure by a flange on the side panels of the sill and a baffle on the bottom edges of the hood. A tamperproof interface is formed at the front of the enclosure by a bend and lip formed in the front panel of the hood in cooperation with a recessed portion formed in the gate.

    摘要翻译: 变压器外壳具有连接到水箱的罩和门槛。 在连接到罐顶部的铰链上,罩可缩回。 门槛连接在靠近基座的坦克前面,并有一个下降到扩张位置的门。 当外壳处于关闭位置时,机罩和门槛与通过防撬界面完全缩回的门槛门相遇。 防护接口通过在门槛的侧板上的凸缘和罩的底部边缘上的挡板形成在外壳的侧面。 通过与形成在门中的凹部配合的在罩的前面板中形成的弯曲和唇缘,在外壳的前部形成防篡改接口。