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1. 发明授权

US06573726B1 Sensitive ground fault detection system for use in compensated electric power distribution networks 有权
标题翻译：用于补偿配电网络的敏感接地故障检测系统
公开(公告)号：US06573726B1
公开(公告)日：2003-06-03
申请号：US09563178
申请日：2000-05-02
申请人： Jeffrey B. Roberts , Daqing Hou , Hector Altuve-Ferrer
发明人： Jeffrey B. Roberts , Daqing Hou , Hector Altuve-Ferrer
IPC分类号： G01R3114
CPC分类号： H02H3/081 , H02H3/402 , H02H9/08
摘要： A system for detecting ground faults in a compensated electric power distribution network includes the determination of zero sequence voltage (V0) and zero sequence current (I0) on a power line and calculating the zero sequence conductance (G0) therefrom. The operation of the conductance calculation circuit occurs only under selected power line conditions involving minimum values of zero sequence voltage, zero sequence current and positive sequence voltage, to ensure the accuracy of a fault direction determination. The conductance values are processed on an adaptive basis in which the difference between the most recent conductance value and a conductance value from a selected previous point in time is determined and then compared against threshold values to make forward and reverse fault declarations.
摘要翻译：用于检测补偿配电网中的接地故障的系统包括确定电源线上的零序电压（V0）和零序电流（I0），并从其计算零序电导（G0）。电导计算电路的工作仅在包括零序电压，零序电流和正序电压的最小值的选定电力线条件下发生，以确保故障方向确定的精度。电导值在自适应基础上进行处理，其中确定最近电导值与选定的先前时间点之间的电导值之间的差值，然后与阈值进行比较以产生正向和反向故障声明。

2. 发明授权

US06518767B1 Line differential protection system for a power transmission line 有权
标题翻译：输电线路差动保护系统
公开(公告)号：US06518767B1
公开(公告)日：2003-02-11
申请号：US09693669
申请日：2000-10-19
申请人： Jeffrey B. Roberts , Gabriel Benmouyal , Hector Altuve-Ferrer , Ralph Folkers , Demetrios Tziouvaras
发明人： Jeffrey B. Roberts , Gabriel Benmouyal , Hector Altuve-Ferrer , Ralph Folkers , Demetrios Tziouvaras
IPC分类号： G01R3108
CPC分类号： H02H3/30 , H02H3/307
摘要： In a power line current differential protection system, all three phase current values (IA, IB and IC) are obtained from both the local end and the remote end of a power transmission line. The magnitude of the ratio of the remote current values to the local current values are calculated. Also, the angle difference between the local and the remote current values for each phase are calculated. Comparison elements then compare the ratio and angle values against preselected values which establish a restrain region in the current ratio plane. Current values which result in the ratio being within the region do not result in a tripping signal for the circuit breaker on the power transmission line, while current values which result in a ratio outside of the region result in a tripping of the circuit breaker. Similar circuitry is used for negative sequence current quantities, with the negative sequence preselected values being set substantially lower to produce a more sensitive response to possible faults in the line.
摘要翻译：在电力线电流差动保护系统中，所有三相电流值（IA，IB和IC）均从输电线的本端和远端获得。计算远程电流值与局部电流值的比值的大小。此外，计算每个相位的本地和远程电流值之间的角度差。然后比较元件将比值和角度值与在当前比例平面中建立约束区域的预选值进行比较。导致该比率在该区域内的电流值不会导致电力传输线路上的断路器的跳闸信号，而导致该区域之外的比率的电流值导致断路器跳闸。类似的电路用于负序电流量，其中负序预选值被设定为低得多，以对该线路中的可能故障产生更敏感的响应。

3. 发明授权

US5790418A Adaptive polarizing memory voltage time constant 失效
标题翻译：自适应极化记忆电压时间常数
公开(公告)号：US5790418A
公开(公告)日：1998-08-04
申请号：US544274
申请日：1995-10-17
申请人： Jeffrey B. Roberts , Daqing Hou
发明人： Jeffrey B. Roberts , Daqing Hou
IPC分类号： H02H3/00 , H02H3/40 , H02H3/26
CPC分类号： H02H3/402 , H02H3/006
摘要： At least two different time constants are used to produce the polarizing memory reference voltage which in turn is used in a protective relay for power transmission lines. For most conditions, a relative short time constant of 1.75 cycles is used, while under other specific conditions, determined automatically, a longer time constant of 15.75 cycles is used.
摘要翻译：使用至少两个不同的时间常数来产生极化存储器参考电压，其又用于输电线路的保护继电器。对于大多数条件，使用1.75个周期的相对短时间常数，而在其他特定条件下，自动确定，使用15.75个周期的较长时间常数。

4. 发明授权

US5731943A Protective relay having out-of-step logic capability 失效
标题翻译：具有超出逻辑能力的保护继电器
公开(公告)号：US5731943A
公开(公告)日：1998-03-24
申请号：US582770
申请日：1996-01-04
申请人： Jeffrey B. Roberts , Daqing Hou , Armando Guzman-Casillas
发明人： Jeffrey B. Roberts , Daqing Hou , Armando Guzman-Casillas
IPC分类号： H02H1/04 , H02H3/40 , H02H3/44 , H02H3/18
CPC分类号： H02H3/402 , H02H1/04 , H02H3/44
摘要： An out-of-step blocking circuit is established with two additional zones in the impedance plane, with the circuit determining the time that the positive sequence impedance takes to move between the two zones. The distance elements for selected zones of protection for the relay are blocked if the impedance moves between the two zones at a rate less than a first threshold. However, a trip signal results if the rate of change is greater than the first threshold but less than a second threshold, indicating an unstable swing. Further, an inner blinder zone is established in the impedance plane within the additional two zones of protection. If the positive sequence impedance entering that zone does not move from that zone within a certain time during an otherwise out-of-step condition, the blocking signals are terminated.
摘要翻译：在阻抗平面中建立了两个附加区域的失步阻塞电路，电路确定正序阻抗在两个区域之间移动的时间。如果阻抗以小于第一阈值的速率在两个区域之间移动，则继电器的所选保护区域的距离元件将被阻止。然而，如果变化率大于第一阈值但小于第二阈值，则表示不稳定的摆动，则产生跳闸信号。此外，在额外的两个保护区内的阻抗平面内建立内部阻挡区。如果进入该区域的正序阻抗在另外的不合格条件下在一定时间内不会从该区域移动，则阻塞信号被终止。

5. 发明授权

US5703745A System for detection of transients from a coupling capacitor voltage transformer used in a protective relay 失效
标题翻译：用于检测保护继电器中使用的耦合电容器电压互感器的瞬变的系统
公开(公告)号：US5703745A
公开(公告)日：1997-12-30
申请号：US546226
申请日：1995-10-20
申请人： Jeffrey B. Roberts , Daqing Hou
发明人： Jeffrey B. Roberts , Daqing Hou
IPC分类号： H02H1/00 , H02H1/04 , H02H3/04 , H02H3/40 , H02H3/38
CPC分类号： H02H3/40 , H02H1/0007 , H02H1/04 , H02H3/04
摘要： The voltage and current conditions on a power transmission line are monitored to determine the coincidence of a low voltage condition and a lack of a high current condition. The coincidence of those two conditions is indicative of a CCVT transient, and the tripping action from zone 1 distance elements is delayed for a period of 1.375 cycles. The tripping delay is supervised by a fault impedance determination, which, if a threshold is exceeded, the remaining portion of the time delay is eliminated, so that a trip is allowed if the time delay period has not expired.
摘要翻译：监测输电线路上的电压和电流状况，以确定低电压条件与缺乏高电流条件的一致性。这两个条件的一致性表示CCVT瞬态，并且来自区域1距离元件的跳闸动作延迟了1.375个周期。通过故障阻抗确定来监视跳闸延迟，如果超过阈值，则消除了延时的剩余部分，使得如果延迟时间没有期满则允许跳闸。

6. 发明授权

US6101075A System for improving protective relay coordination with other protective elements in power system 有权
标题翻译：用于改善与电力系统中其他保护元件的保护继电器配合的系统
公开(公告)号：US6101075A
公开(公告)日：2000-08-08
申请号：US150556
申请日：1998-09-10
申请人： Jeffrey B. Roberts
发明人： Jeffrey B. Roberts
IPC分类号： H02H7/30 , H02H3/00
CPC分类号： H02H7/30
摘要： The system first identifies the existence of a fault involving ground using the phase angle difference between negative sequence and zero sequence current on the power line. Phase angle differences within three specific ranges provide an indication of the presence of particular faults. Once a particular fault has been identified, such as a BC-to-ground fault, the fault condition is monitored to determine if the fault evolves, such as to a C-to-ground fault from the BC-to-ground fault. If an evolution is recognized, the protective relay is reset so as to coordinate its operation with downstream protective elements for the evolved fault.
摘要翻译：系统首先利用电力线上的负序和零序电流之间的相位角差来识别涉及地面的故障。三个特定范围内的相位角差异表示特定故障的存在。一旦识别出特定的故障，例如BC对地故障，则监视故障状况以确定故障是否发生，例如从BC到地故障的C对地故障。如果识别出演进，则保护继电器被复位，以便协调其与用于演化故障的下游保护元件的操作。

7. 发明授权

US6028754A System for preventing undesired protective relay tripping actions due to coupling capacitor voltage transformer transients 失效
标题翻译：用于防止由于耦合电容器电压互感器瞬变引起的不期望的保护继电器跳闸动作的系统
公开(公告)号：US6028754A
公开(公告)日：2000-02-22
申请号：US953310
申请日：1997-10-17
申请人： Armando Guzman-Casillas , Jeffrey B. Roberts
发明人： Armando Guzman-Casillas , Jeffrey B. Roberts
IPC分类号： H02H1/00 , H02H1/04 , H02H3/04 , H02H3/40 , H02H3/00
CPC分类号： H02H3/40 , H02H1/0007 , H02H1/04 , H02H3/04
摘要： The system impedance ratio (SIR) is determined for the original zone 1 distance element reach of a protective relay. The reduction in the original zone 1 reach is then determined, using the SIR value and a known table of reduced values. When a fault is recognized the minimum reach to just detect the fault is determined. A trip signal is provided without any delay if the minimum reach is less than or equal to the reduced reach. The trip is delayed for a selected time if the minimum reach is greater than the reduced reach but not greater than the original reach.
摘要翻译：对于保护继电器的原始区域1距离元件到达，确定系统阻抗比（SIR）。然后使用SIR值和已知的减小值来确定原始区域1达到的减小。当识别故障时，确定刚刚检测到故障的最小范围。如果最小距离小于或等于减小的距离，则提供跳闸信号而没有任何延迟。如果最小距离大于缩小的距离但不大于原来的距离，则该行程延迟选定的时间。

8. 发明授权

US6011480A Protection quality capability for protective relays used in an electric power system 失效
标题翻译：电力系统中使用的保护继电器的保护质量能力
公开(公告)号：US6011480A
公开(公告)日：2000-01-04
申请号：US898793
申请日：1997-07-23
申请人： Edmund O. Schweitzer, III , Jeffrey B. Roberts
发明人： Edmund O. Schweitzer, III , Jeffrey B. Roberts
IPC分类号： H02H3/04 , G08B21/00
CPC分类号： H02H3/04
摘要： The system for determining protection quality of a protective relay and related functions of the protection system include obtaining information concerning the output status of the various protective elements in the relay. The status of various operations in the protective element are also evaluated against specific standards. The operation of supervisory and control elements affecting the action protective elements are also evaluated. Other aspects of the relay, including the availability of the relay and the operation of the voltage and current transformers are also evaluated. In addition, associated aspects such as the status of the communication channels, the station voltage availability and the condition of the trip and close circuits are monitored. All of the above is analyzed in a summary report to provide an indication of protection quality for the relay and associated protection system functions.
摘要翻译：用于确定保护继电器的保护质量的系统和保护系统的相关功能包括获得关于继电器中各种保护元件的输出状态的信息。保护要素中各种作业的状况也按照具体标准进行评估。还对影响行动保护要素的监督和控制要素的运行情况进行了评估。还评估了继电器的其他方面，包括继电器的可用性和电压和电流互感器的操作。此外，监视诸如通信信道的状态，站电压可用性以及跳闸和关闭电路的状况等相关方面。所有上述内容都在总结报告中进行分析，以提供继电器和相关保护系统功能的保护质量指示。

9. 发明授权

US5041737A Programmable bus-tie relay having a plurality of selectable setting groups 失效
标题翻译：具有多个可选设置组的可编程总线中继继电器
公开(公告)号：US5041737A
公开(公告)日：1991-08-20
申请号：US470061
申请日：1990-01-25
申请人： Edmund O. Schweitzer, III , Jeffrey B. Roberts
发明人： Edmund O. Schweitzer, III , Jeffrey B. Roberts
IPC分类号： H02H3/00
CPC分类号： H02H3/006 , Y10T307/74 , Y10T307/826
摘要： A bus-tie relay apparatus which includes a multi-position mechanical switch (54) and a logic circuit (56) responsive to the position of the mechanical switch (54) for producing digital signals on five digital lines (58), wherein a valid digital signal comprises the presence of high conditions on two, and two only, of said digital lines (58). A sensor (80) senses the condition of the digital lines (58) and retrieves the values of a relay element setting group from memory associated with that digital signal. A plurality of such relay element setting groups are stored in the apparatus, each one of which comprises values corresponding to the characteristics of an inplace relay associated with a particular one transmission line in a group thereof.
摘要翻译：一种汇流中继装置，包括多位机械开关（54）和响应于机械开关（54）的位置的逻辑电路（56），用于在五个数字线路（58）上产生数字信号，其中有效数字信号包括在所述数字线路（58）的两个且仅两个上存在高条件。传感器（80）感测数字线（58）的状态，并且从与该数字信号相关联的存储器中检索中继元件设置组的值。多个这样的中继元件设置组被存储在该装置中，每一个包括与其组中的特定一个传输线相关联的内置继电器的特性对应的值。

10. 发明申请

US20100014198A1 Method, Apparatus and Computer Program Product for Fault Protection 失效
标题翻译：方法，仪器和计算机程序产品故障保护
公开(公告)号：US20100014198A1
公开(公告)日：2010-01-21
申请号：US12245180
申请日：2008-10-03
申请人： Louis V. Dusang, JR. , Jeffrey B. Roberts
发明人： Louis V. Dusang, JR. , Jeffrey B. Roberts
IPC分类号： H02H9/08
CPC分类号： H02H7/26 , H02H3/165
摘要： An apparatus is provided for fault protection. The apparatus may include one or more electronic components configured to receive a single phase-to-ground fault signal and a double phase-to-ground fault signal subsequent to receiving the single phase-to-ground fault signal. The one or more of electronic components may be further configured to provide for a delay while the single phase-to-ground fault signal indicates that a single phase-to-ground fault is present on the ungrounded power system and the double phase-to-ground fault signal indicates that the double phase-to-ground fault is present on the ungrounded power system. The delay may allow for an opportunity to isolate a phase-to-ground fault on a first phase from a phase-to-ground fault on a second phase. Associated methods and computer program products are also provided.
摘要翻译：提供了用于故障保护的装置。该装置可以包括一个或多个电子部件，其被配置为在接收单个相对地故障信号之后接收单个相对地故障信号和双相对地故障信号。电子部件中的一个或多个可以被进一步配置为提供延迟，而单相对地故障信号指示在未接地的电力系统上存在单个相对地故障，并且双相 - 接地故障信号表示未接地电源系统存在双相接地故障。延迟可以允许将第一相上的相对地故障与第二相上的相对地故障隔离开的机会。还提供了相关方法和计算机程序产品。

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