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    • 3. 发明申请
    • Power Angle Monitor
    • 功率角度监视器
    • US20120313490A1
    • 2012-12-13
    • US13550287
    • 2012-07-16
    • Edmund O. Schweitzer, IIIDavid E. Whitehead
    • Edmund O. Schweitzer, IIIDavid E. Whitehead
    • H02K11/00
    • G01D5/3473H02K11/22
    • A system and method for monitoring the rotation of a generator rotor. 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 may be 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, allowing for more accurate comparison of the power angles.
    • 一种用于监测发电机转子旋转的系统和方法。 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。 可以使用来自发电机的端子的信号波形的脉冲与参考点(例如过零点)之间的时间来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。 该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,从而允许对功率角进行更准确的比较。
    • 6. 发明申请
    • ELECTRIC POWER SYSTEM CONTROL SYSTEM WITH SELECTIVE ENCLOSURE
    • 具有选择性外壳的电力系统控制系统
    • US20100201230A1
    • 2010-08-12
    • US12697614
    • 2010-02-01
    • Edmund O. Schweitzer, IIIVictor Hugo Barrangan GonzalezRichard A. Shulz
    • Edmund O. Schweitzer, IIIVictor Hugo Barrangan GonzalezRichard A. Shulz
    • A47B87/00A47B96/00F16M13/00H05K5/02
    • H02B7/06H02B1/50H02B3/00
    • An enclosure for electric power system control, monitoring, protection, and automation access devices, which includes a selective workspace enclosure. The enclosure includes a workspace enclosure for enclosing a workspace adjacent to a device for controlling, protecting, monitoring, and/or monitoring an electric power system, thereby providing a shelter or barrier to the elements for personnel accessing the device. Generally, the enclosure may be partitioned to include a number of cabinets, in each of which a number of devices may be installed. The enclosure may further include a platform, guide members, protective barriers and cover members (when retracted housed in a cover cabinet) to provide a shelter or barrier to the elements for personnel accessing the devices from a select workspace. The enclosure may be modular in that multiple modules, each of which may include its own protective cover member, may be installed adjacent to each other, such that enclosed workspaces may be selectively extended to provide enclosed workspaces only as needed.
    • 用于电力系统控制,监控,保护和自动化访问设备的机箱,其中包括选择性工作区。 外壳包括用于围绕与用于控制,保护,监视和/或监视电力系统的设备相邻的工作空间的工作空间外壳,从而为访问设备的人员提供对元件的遮蔽物或屏障。 通常,外壳可以被分隔成包括多个机柜,每个机柜可以安装多个设备。 外壳还可以包括平台,引导构件,保护屏障和盖构件(当缩回容纳在盖柜中时),以便为从用户选择的工作空间访问设备的人员的元件提供遮蔽物或屏障。 外壳可以是模块化的,其中每个模块可以包括其自己的保护盖构件可以彼此相邻地安装,使得封闭的工作空间可以被选择性地延伸以仅根据需要提供封闭的工作空间。
    • 8. 发明授权
    • Protective relay for power systems having fault distance measurement filter logic
    • 具有故障距离测量滤波器逻辑的电力系统的保护继电器
    • US07345862B2
    • 2008-03-18
    • US10695978
    • 2003-10-29
    • Edmund O. Schweitzer, IIIJoseph B. Mooney
    • Edmund O. Schweitzer, IIIJoseph B. Mooney
    • H02H3/42
    • H02H3/40
    • The system is used in a distance-type protective relay which includes a calculation circuit responsive to voltage and current values from a power line to produce a quantity which is analogous to the distance between the relay and a fault on the line, referred to as an m quantity. This quantity is then applied to a distance element/circuit for comparison of said quantity with a setting reach value for a zone one distance protection to determine whether the fault is within zone one protection. The system includes a filter circuit which filters the quantity before it reaches the distance element, resulting in a smoothing of said quantity and rejection of noise therefrom. The system further includes a control circuit which determines whether the filter is to be used in the system in a particular situation, depending upon whether when the value of the quantity is above a selected percentage of the setting reach value.
    • 该系统用于距离型保护继电器,其包括响应于来自电力线的电压和电流值的计算电路,以产生类似于继电器与线路上的故障之间的距离的量,称为 数量。 然后将该数量应用于距离元件/电路,用于将所述数量与区域一距离保护的设定到达值进行比较,以确定故障是否在区域一保护范围内。 该系统包括一个过滤器电路,它在到达距离元件之前对其进行过滤,导致所述数量的平滑化和噪音的抑制。 该系统还包括控制电路,该控制电路根据该数量的值是否在设定达到值的选定百分比以上来确定是否在特定情况下在系统中使用该滤波器。
    • 10. 发明授权
    • Negative sequence directional element for a relay useful in protecting
power transmission lines
    • 用于保护输电线路的继电器的负序定向元件
    • US5365396A
    • 1994-11-15
    • US83454
    • 1993-06-28
    • Jeffrey B. RobertsEdmund O. Schweitzer, III
    • Jeffrey B. RobertsEdmund O. Schweitzer, III
    • H02H3/08H02H3/40H02H7/26H02H3/26
    • H02H3/402H02H3/081H02H7/26
    • A directional element measures the negative sequence voltage and the negative sequence current and from those quantities produces a scalar quantity related to the negative sequence impedance of a power transmission line relative to the location of the directional element. The magnitude of the negative sequence impedance is calculated from the magnitude of the negative sequence voltage and magnitude of the negative sequence current. The scalar quantity is then compared against two threshold quantity settings, one to determine a forward fault and the other to determine a reverse fault. The threshold quantity settings include, respectively, a selected fraction of preselected basic threshold values and a selected fraction of the magnitude of the negative sequence impedance. The scalar quantity must be less than the forward threshold quantity for a forward fault and greater than the reverse threshold quantity for a reverse fault.
    • 方向元件测量负序电压和负序电流,并且从那些量产生与电力传输线相对于方向元件的位置的负序阻抗相关的标量。 负序阻抗的大小根据负序电压的大小和负序电流的大小计算。 然后将标量与两个阈值设置进行比较,一个用于确定正向故障,另一个用于确定反向故障。 阈值设置分别包括预选基本阈值的选定分数和负序阻抗幅度的选定分数。 标量必须小于正向故障的正向阈值,大于反向故障的反向阈值。