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11. 发明授权

US5365396A Negative sequence directional element for a relay useful in protecting power transmission lines 失效
标题翻译：用于保护输电线路的继电器的负序定向元件
公开(公告)号：US5365396A
公开(公告)日：1994-11-15
申请号：US83454
申请日：1993-06-28
申请人： Jeffrey B. Roberts , Edmund O. Schweitzer, III
发明人： Jeffrey B. Roberts , Edmund O. Schweitzer, III
IPC分类号： H02H3/08 , H02H3/40 , H02H7/26 , H02H3/26
CPC分类号： H02H3/402 , H02H3/081 , H02H7/26
摘要： 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.
摘要翻译：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。

12. 发明授权

US5262679A Polarizing potential transfer switch circuit for use with power transmission lines 失效
标题翻译：用于输电线路的极化电位转换开关电路
公开(公告)号：US5262679A
公开(公告)日：1993-11-16
申请号：US737373
申请日：1991-07-29
申请人： Edmund O. Schweitzer, III , Jeffrey B. Roberts , William D. Hawbaker
发明人： Edmund O. Schweitzer, III , Jeffrey B. Roberts , William D. Hawbaker
IPC分类号： H02B1/24 , H02H1/04 , H02J3/04
CPC分类号： H02J3/04 , H02B1/24 , H02H1/04 , Y10T307/826 , Y10T307/839
摘要： The polarizing potential transfer switch system takes advantage of an existing loss-of-potential (LOP) circuit (32) in a power transmission line protective system to differentiate between a trip signal produced by the distance elements in a protective relay (22) due to the operation of the transfer switch and a true fault condition. This is accomplished by a logic circuit (40) which includes a first timer (58) which permits the operator of the transfer switch (10) five seconds to complete the potential transfer operation between two buses (14 and 16) and a second timer (68) which gives the LOP circuit (32) a selected number of cycles in which to block a trip signal produced by the distance elements in the relay (22).
摘要翻译：极化电位转移开关系统利用电力传输线路保护系统中的现有的电位（LOP）电路（32）来区分由于保护继电器（22）中的距离元件产生的跳闸信号，由此转换开关的操作和真实的故障状态。这是通过逻辑电路（40）实现的，逻辑电路（40）包括第一定时器（58），其允许转换开关（10）的操作者五秒钟以完成两条总线（14和16）和第二计时器（14和16）之间的潜在转移操作 68）给LOP电路（32）选择数量的周期，以阻止由继电器（22）中的距离元件产生的跳闸信号。

13. 发明授权

US4998098A Overvoltage detector to indicate voltage to a remote monitor 失效
标题翻译：过电压检测器，用于指示远程监视器的电压
公开(公告)号：US4998098A
公开(公告)日：1991-03-05
申请号：US302398
申请日：1989-01-26
申请人： Edmund O. Schweitzer, III
发明人： Edmund O. Schweitzer, III
IPC分类号： G01R19/165
CPC分类号： G01R19/16547
摘要： An voltage monitoring system including means for providing a voltage from a current and for reducing the voltage. The system also includes means for integrating the current. The integrating means provides an output which increases from an initial condition at a rate proportional to the voltage. The system further includes means for sensing when the output of the integrating means is above a predetermined level and for resetting the integrating means to the initial condition. Additionally, the system includes means for indicating when the output of the integrating means exceeds the predetermined level.
摘要翻译：一种电压监视系统，包括用于从电流提供电压并用于降低电压的装置。该系统还包括用于整合电流的装置。积分装置提供以与电压成比例的速率从初始条件增加的输出。该系统还包括用于感测积分装置的输出何时高于预定水平并用于将积分装置重置为初始状态的装置。此外，该系统包括用于指示积分装置的输出何时超过预定水平的装置。

14. 发明授权

US08706309B2 Systems and method for obtaining a load model and related parameters based on load dynamics 有权
标题翻译：基于负载动力学获得负载模型和相关参数的系统和方法
公开(公告)号：US08706309B2
公开(公告)日：2014-04-22
申请号：US12757995
申请日：2010-04-10
申请人： Edmund O. Schweitzer, III , Marcos A. Donolo , David E. Whitehead
发明人： Edmund O. Schweitzer, III , Marcos A. Donolo , David E. Whitehead
IPC分类号： G06G7/62
CPC分类号： H02J3/12 , H02J3/14 , H02J13/0013 , H02J2003/003 , H02J2003/007 , Y02E60/724 , Y02E60/76 , Y04S10/18 , Y04S10/54 , Y04S40/22
摘要： Disclosed are systems and methods for calculating load models and associated tunable parameters that may be used to describe the behavior of loads connected to an electric power distribution system. The load models may be utilized to predict variations in demand caused by changes in the supply voltage, and may be utilized in determining an optimized control strategy based on load dynamics. Any action which causes a disruption to the electric power distribution system may provide information regarding the composition or dynamics of connected loads. Such actions may be referred to as modeling events. Modeling events may occur with some frequency in electric power distribution systems, and accordingly, a number of data sets may be acquired under a variety of conditions and at a variety of times. Load models may include static load models, dynamic load models, or a combination of static and dynamic load models.
摘要翻译：公开了用于计算负载模型和相关联的可调参数的系统和方法，其可以用于描述连接到配电系统的负载的行为。可以利用负载模型来预测由电源电压变化引起的需求变化，并且可以用于基于负载动力学来确定优化的控制策略。导致电力分配系统中断的任何动作可以提供关于所连接负载的组成或动力学的信息。这种动作可以被称为建模事件。建模事件可能在电力分配系统中发生一些频率，因此，可以在各种条件和各种时间获取多个数据集。负载模型可能包括静态负载模型，动态负载模型或静态和动态负载模型的组合。

15. 发明授权

US08674683B2 Power angle monitor 有权
标题翻译：功率角度监视器
公开(公告)号：US08674683B2
公开(公告)日：2014-03-18
申请号：US13550287
申请日：2012-07-16
申请人： Edmund O. Schweitzer, III , David E. Whitehead
发明人： Edmund O. Schweitzer, III , David E. Whitehead
IPC分类号： G01P3/42
CPC分类号： G01D5/3473 , H02K11/22
摘要： 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.
摘要翻译：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。

16. 发明授权

US08581723B2 Fault detection using phase comparison 有权
标题翻译：故障检测采用相位比较
公开(公告)号：US08581723B2
公开(公告)日：2013-11-12
申请号：US12906813
申请日：2010-10-18
申请人： Edmund O. Schweitzer, III , David E. Whitehead
发明人： Edmund O. Schweitzer, III , David E. Whitehead
IPC分类号： G08B1/08
CPC分类号： H02G1/02 , G01R31/085 , H02J13/0075 , H04Q9/00 , H04Q2209/40 , H04Q2209/75 , H04Q2209/883 , Y02E60/74 , Y04S10/30
摘要： A system for communicating information between a detection device and a wireless device is provided. The system generally includes a detection device adapted to monitor a condition related to a power system. A radio interface unit is in communication with the detection device via a communication member. A wireless device is further provided which is in radio communication with the radio interface unit such that the detection device communicates information to the wireless device through a radio interface unit. The system's components are further adapted to endure harsh conditions (e.g., prolonged exposure to water).
摘要翻译：提供了一种用于在检测设备和无线设备之间传送信息的系统。该系统通常包括适于监视与电力系统有关的状况的检测装置。无线接口单元经由通信部件与检测装置通信。还提供一种与无线接口单元进行无线电通信的无线设备，使得检测设备通过无线接口单元向无线设备传送信息。系统的部件进一步适应于忍受恶劣条件（例如长时间暴露在水中）。

17. 发明授权

US08405940B2 Systems and methods for generator ground fault protection 有权
标题翻译：发电机接地故障保护的系统和方法
公开(公告)号：US08405940B2
公开(公告)日：2013-03-26
申请号：US12903104
申请日：2010-10-12
申请人： Edmund O. Schweitzer, III , Veselin Skendzic , Gabriel Benmouyal , Bruce A. Hall , Rogerio Scharlach
发明人： Edmund O. Schweitzer, III , Veselin Skendzic , Gabriel Benmouyal , Bruce A. Hall , Rogerio Scharlach
IPC分类号： H02H3/00
CPC分类号： H02H3/17 , H02H7/06
摘要： A generator winding-to-ground fault detection system is disclosed that includes a signal injection source in electrical communication with a winding of an electric power generator via an injection transformer. The winding may be coupled to ground via a winding-to-ground path and the signal generation source may generate an injection signal capable of being injected to the winding using the injection transformer. The disclosed system may further include a protection module in communication with the signal injection source and the electric power generator configured to receive the injection signal and a signal relating to the current through the winding-to-ground path, and to determine the occurrence of a winding-to-ground fault condition based at least in part on the injection signal and the signal relating to the current through the winding-to-ground path.
摘要翻译：公开了一种发电机绕组到地面故障检测系统，其包括经由注入变压器与发电机的绕组电连通的信号注入源。绕组可以经由绕线对地路径耦合到地，并且信号发生源可以产生能够使用注入变压器注入到绕组的注入信号。所公开的系统还可以包括与信号注入源通信的保护模块和被配置为接收注入信号的电力发生器和与通过绕组对地路径的电流相关的信号，并且确定至少部分地基于注入信号和与通过绕线对地路径的电流相关的信号的绕组到地的故障条件。

18. 发明授权

US08319628B2 Three-phase faulted circuit indicator 有权
标题翻译：三相故障电路指示灯
公开(公告)号：US08319628B2
公开(公告)日：2012-11-27
申请号：US12417893
申请日：2009-04-03
申请人： Edmund O. Schweitzer, III , Laurence V. Feight , James Manely Duros , Joseph Robert Rauch
发明人： Edmund O. Schweitzer, III , Laurence V. Feight , James Manely Duros , Joseph Robert Rauch
IPC分类号： G08B1/08
CPC分类号： G01R31/025 , G01R1/22 , G01R15/20 , G01R19/16571
摘要： A three-phase faulted circuit indicator adjustable to accommodate a variety of three-phase power cables is disclosed. In one embodiment, faulted circuit indicator comprises a flexible holder that encircles the monitored conductor slightly more than one time. The flexible holder includes a plurality of magnetic sensors for monitoring the current within the internal conductors of the power cable, a logic circuit for determining the occurrence of a fault, and an output device for providing an indication of a fault. In a second embodiment, the faulted circuit indicator comprises a plurality of sensor compartments, each disposed about a central point, and each coupled to two other sensor compartments.
摘要翻译：公开了可调节以适应各种三相电力电缆的三相故障电路指示器。在一个实施例中，故障电路指示器包括柔性保持器，其稍微超过一次地围绕被监视的导体。柔性保持器包括用于监测电力电缆的内部导体内的电流的多个磁性传感器，用于确定故障发生的逻辑电路以及用于提供故障指示的输出装置。在第二实施例中，故障电路指示器包括多个传感器隔间，每个传感器隔间围绕中心点设置，并且每个传感器隔间耦合到另外两个传感器隔间。

19. 发明授权

US08248060B2 Power angle monitor 有权
公开(公告)号：US08248060B2
公开(公告)日：2012-08-21
申请号：US12247866
申请日：2008-10-08
申请人： Edmund O. Schweitzer, III , David E. Whitehead
发明人： Edmund O. Schweitzer, III , David E. Whitehead
IPC分类号： G01P3/42
CPC分类号： G01D5/3473 , H02K11/22
摘要： 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, allowing for more accurate comparison of the power angles.

20. 发明申请

US20110260042A1 Power Angle Monitor 有权
标题翻译：功率角度监视器
公开(公告)号：US20110260042A1
公开(公告)日：2011-10-27
申请号：US13177392
申请日：2011-07-06
申请人： Edmund O. Schweitzer, III , David E. Whitehead
发明人： Edmund O. Schweitzer, III , David E. Whitehead
IPC分类号： G01D5/36
CPC分类号： G01D5/3473 , H02K11/22
摘要： 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, allowing for more accurate comparison of the power angles.
摘要翻译：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。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。

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