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    • 2. 发明申请
    • SECURE ARC FLASH DETECTION
    • 安全闪光检测
    • WO2010033830A1
    • 2010-03-25
    • PCT/US2009/057520
    • 2009-09-18
    • SCHWEITZER ENGINEERING LABORATORIES, INC.SCHWEITZER, Edmund, O.
    • SCHWEITZER, Edmund, O.
    • H02H3/00
    • H02H1/0023G01J1/02G01J1/0228G01J2001/0276H02H3/04
    • An intelligent electronic device (IED) may be configured to detect arc flash events within a power system using stimulus measurements acquired by detection devices communicatively coupled to the power system. An arc flash event may be detected using a time-intensity comparison metric, such as an inverse time-over- stimulus metric, a cumulative stimulus metric, or the like. The stimulus may include electro-optical (EO) radiation produced in the vicinity of the power system, current measurements, or the like. The IED may detect an arc flash event if one or more of the stimulus types are indicative of an arc flash event. Responsive to detecting an arc flash event, the IED, or other protective element, may take one or more protective actions, such as issuing trip commands, or the like.
    • 智能电子设备(IED)可以被配置为使用通过通信耦合到电力系统的检测设备获取的刺激测量来检测电力系统内的电弧闪光事件。 可以使用诸如反超时刺激度量,累积刺激度量等的时间 - 强度比较度量来检测电弧闪光事件。 刺激可以包括在电力系统附近产生的电光(EO)辐射,电流测量等。 如果一个或多个刺激类型表示电弧闪光事件,则IED可以检测电弧闪光事件。 响应于检测电弧闪光事件,IED或其他保护元件可采取一个或多个保护动作,例如发出行程命令等。
    • 6. 发明申请
    • POWER ANGLE MONITOR
    • 动力角监视器
    • WO2009048970A1
    • 2009-04-16
    • PCT/US2008/079228
    • 2008-10-08
    • SCHWEITZER ENGINEERING LABORATORIES, INC.SCHWEITZER, Edmund, O.WHITEHEAD, David, E.
    • SCHWEITZER, Edmund, O.WHITEHEAD, David, E.
    • G01R23/00
    • G01D5/3473H02K11/22
    • A system and method for monitoring the rotation of a generator rotor and calculating a power angle using an optical rotor displacement monitor. The monitor uses a light beam directed toward the rotor to detect a marking thereon, and generates an electrical pulse when the marking is detected. The time between the pulse and a reference point (such as a zero crossing) of the signal waveform from the terminals of the generator is used to calculate the power angle of the generator. The system is adaptive in that it can account for new markings on the rotor. The system may be connected to a network so that power angles from various generators on the electrical network may be compared. The system may further be connected to a common time source such that a time stamp may be applied to the power angles from various generators.
    • 一种用于监测发电机转子的旋转并使用光学转子位移监测器计算功率角的系统和方法。 监视器使用指向转子的光束来检测其上的标记,并且当检测到标记时产生电脉冲。 来自发生器的端子的信号波形的脉冲和参考点(例如过零点)之间的时间用于计算发电机的功率角。 该系统是适应性的,因为它可以解释转子上的新标记。 该系统可以连接到网络,使得可以比较电网上来自各种发电机的功率角度。 系统还可以连接到公共时间源,使得可以将时间戳应用于来自各种发电机的功率角。