APPARATUS AND METHOD FOR ADAPTIVE FAULT DETECTION IN MV DISTRIBUTION CIRCUITS
    3.
    发明申请
    APPARATUS AND METHOD FOR ADAPTIVE FAULT DETECTION IN MV DISTRIBUTION CIRCUITS 有权
    MV分配电路中自适应故障检测的装置和方法

    公开(公告)号:US20100066381A1

    公开(公告)日:2010-03-18

    申请号:US12554614

    申请日:2009-09-04

    IPC分类号: G01R31/00

    CPC分类号: H02H3/0935 H02H1/0015

    摘要: A method and a protective device operable to perform the method are provided, wherein the method is for detecting and analyzing faults in a first cable and one or more other cables, which convey power in a three phase feeder system. Current magnitude in the first cable is compared to a threshold level. If the current magnitude exceeds the threshold level, the duration of the condition is measured. If the duration falls within a predetermined duration range, a predetermined time interval is allowed to pass and then a determination is made whether a fault is detected in the one or more other cables. If a fault is not detected in the one or more other cables, then a determination is made that a single phase fault has occurred in the feeder system.

    摘要翻译: 提供了可操作以执行该方法的方法和保护装置,其中该方法用于检测和分析在三相馈线系统中传送功率的第一电缆和一个或多个其它电缆中的故障。 将第一条电缆中的电流幅值与阈值电平进行比较。 如果电流幅度超过阈值水平,则测量条件的持续时间。 如果持续时间在预定的持续时间范围内,则允许预定的时间间隔通过,然后确定在一个或多个其它电缆中是否检测到故障。 如果在一条或多条其他电缆中未检测到故障,则确定在馈电系统中发生单相故障。

    Apparatus and method for adaptive fault detection in MV distribution circuits
    4.
    发明授权
    Apparatus and method for adaptive fault detection in MV distribution circuits 有权
    中压配电电路自适应故障检测装置及方法

    公开(公告)号:US08390302B2

    公开(公告)日:2013-03-05

    申请号:US12554614

    申请日:2009-09-04

    IPC分类号: G01R31/02 H04B3/46

    CPC分类号: H02H3/0935 H02H1/0015

    摘要: A method and a protective device operable to perform the method are provided, wherein the method is for detecting and analyzing faults in a first cable and one or more other cables, which convey power in a three phase feeder system. Current magnitude in the first cable is compared to a threshold level. If the current magnitude exceeds the threshold level, the duration of the condition is measured. If the duration falls within a predetermined duration range, a predetermined time interval is allowed to pass and then a determination is made whether a fault is detected in the one or more other cables. If a fault is not detected in the one or more other cables, then a determination is made that a single phase fault has occurred in the feeder system.

    摘要翻译: 提供了可操作以执行该方法的方法和保护装置,其中该方法用于检测和分析在三相馈线系统中传送功率的第一电缆和一个或多个其它电缆中的故障。 将第一条电缆中的电流幅度与阈值电平进行比较。 如果电流幅度超过阈值水平,则测量条件的持续时间。 如果持续时间在预定的持续时间范围内,则允许预定的时间间隔通过,然后确定在一个或多个其它电缆中是否检测到故障。 如果在一条或多条其他电缆中未检测到故障,则确定在馈电系统中发生单相故障。