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公开(公告)号：US5731943A
公开(公告)日：1998-03-24
申请号：US582770
申请日：1996-01-04
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。
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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
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。
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3.发明授权公开(公告)号：US06573726B1
公开(公告)日：2003-06-03
申请号：US09563178
申请日：2000-05-02
IPC分类号： G01R3114
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。
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4.发明授权System for detection of transients from a coupling capacitor voltage transformer used in a protective relay 失效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
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。
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5.发明申请System for maintaining fault-type selection during an out-of-step condition 审中-公开用于在失步状态下维护故障类型选择的系统公开(公告)号：US20060152866A1
公开(公告)日：2006-07-13
申请号：US11036863
申请日：2005-01-13
申请人： Gabriel Benmouyal , Daqing Hou
发明人： Gabriel Benmouyal , Daqing Hou
IPC分类号： H02H3/00
CPC分类号： H02H3/402
摘要： A system for maintaining fault-type selection during an out-of-step condition is provided comprising an element for calculating the element reach M; an element for fault type selection; an element for out-of-step detection and blocking; and an element for distinguishing between single-phase-to-ground faults and double-phase-to-ground faults. Single-phase-to-ground faults are distinguished from double-phase-to-ground faults through either a derivative or integration element.
摘要翻译： 提供了一种用于在失步状态期间维持故障类型选择的系统，包括用于计算元素到达M的元素; 故障类型选择要素; 用于失步检测和阻塞的元素; 以及用于区分单相对地故障和双相到地故障的元件。 单相接地故障通过导数或积分元件与双相接地故障区分开来。
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6.发明授权Systems and methods for detecting high-impedance faults in a multi-grounded power distribution system 有权用于检测多接地配电系统中的高阻抗故障的系统和方法公开(公告)号：US07720619B2
公开(公告)日：2010-05-18
申请号：US11499620
申请日：2006-08-04
申请人： Daqing Hou
发明人： Daqing Hou
IPC分类号： G01R31/00
CPC分类号： H02H1/0015
摘要： The apparatus and methods calculate a plurality of sum of differences for a power distribution system quantity with a sum of difference filter, provide a set of predetermined blocking conditions, provide a trending and memory with an output, generate a set threshold with an adaptive tuning algorithm; establish a reference based upon the plurality of power distribution quantities differences from the one-cycle difference filter and the set threshold, calculate a ratio of the difference between the plurality of sum of differences from the sum of difference filter and the reference, memorize a time and form a trend output if the ratio of the difference exceeds the set threshold, and determine the existence of a high-impedance fault with decision logic based on the trend output and the set of predetermined blocking conditions.
摘要翻译： 该装置和方法使用差分滤波器的和来计算配电系统数量的多个差和，提供一组预定的阻塞条件，向趋势和存储器提供输出，使用自适应调谐算法生成设定的阈值 ; 基于来自一周期差分滤波器和设定阈值的多个功率分配量差建立参考，计算出差分和之差与差分滤波器和参考的和之间的差的比率，记住时间 并且如果差值的比率超过设定的阈值，则形成趋势输出，并且基于趋势输出和预定的阻塞条件的集合来确定具有决策逻辑的高阻抗故障的存在。
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7.发明申请Systems and methods for detecting high-impedance faults in a multi-grounded power distribution system 有权用于检测多接地配电系统中的高阻抗故障的系统和方法公开(公告)号：US20080031520A1
公开(公告)日：2008-02-07
申请号：US11803386
申请日：2007-05-14
申请人： Daqing Hou
发明人： Daqing Hou
IPC分类号： G06K9/00
CPC分类号： H02H1/0015
摘要： The system and methods monitor odd harmonics within a power distribution system quantity using a special digital filter. A normal level of odd harmonics for the monitored quantity is established. Over predetermined time periods, the odd harmonics within the power distribution quantity are compared to the normal level, and a determination of whether a high-impedance fault is present in the monitored power distribution system is made.
摘要翻译： 该系统和方法使用专用数字滤波器监测配电系统数量内的奇次谐波。 建立监测量的奇次谐波正常水平。 在预定的时间周期内，将功率分配量内的奇次谐波与正常电平进行比较，并且确定是否在监视的配电系统中存在高阻抗故障。
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公开(公告)号：US12105782B2
公开(公告)日：2024-10-01
申请号：US17591385
申请日：2022-02-02
申请人： Daqing Hou , Stephanie Schuckers , Mahesh Banavar , Blaine Ayotte
发明人： Daqing Hou , Stephanie Schuckers , Mahesh Banavar , Blaine Ayotte
CPC分类号： G06F21/32 , G06F11/3438
摘要： A system and method to authenticate users on a computing system using a free text behavioral biometric method by recording on the computer system a dataset for each user to be authenticated to create a user profile for each user to be authenticated, each data set comprising a plurality of free-text keystrokes entered by a respective user on a computer that is part of the computing system, and storing each user profile in the memory, subsequently collecting the keystrokes of a user to be authenticated as the user enters text on a keyboard connected to the computing system, creating a plurality of graphs based on the collection of keystrokes entered by the user and calculating n instance based tail area density (ITAD) metric, and then combining the ITAD metric for each graph duration into a single similarity score.
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9.发明授权Systems and methods for detecting high-impedance faults in a multi-grounded power distribution system 有权用于检测多接地配电系统中的高阻抗故障的系统和方法公开(公告)号：US07945400B2
公开(公告)日：2011-05-17
申请号：US11803386
申请日：2007-05-14
申请人： Daqing Hou
发明人： Daqing Hou
IPC分类号： G01R31/00
CPC分类号： H02H1/0015
摘要： The system and methods monitor odd harmonics within a power distribution system quantity using a special digital filter. A normal level of odd harmonics for the monitored quantity is established. Over predetermined time periods, the odd harmonics within the power distribution quantity are compared to the normal level, and a determination of whether a high-impedance fault is present in the monitored power distribution system is made.
摘要翻译： 该系统和方法使用专用数字滤波器监测配电系统数量内的奇次谐波。 建立监测量的奇次谐波正常水平。 在预定的时间周期内，将功率分配量内的奇次谐波与正常电平进行比较，并且确定是否在监视的配电系统中存在高阻抗故障。
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公开(公告)号：US20060067095A1
公开(公告)日：2006-03-30
申请号：US11236352
申请日：2005-09-27
IPC分类号： H02M1/00
CPC分类号： H02J3/24
摘要： A system and method for accomplishing power swing blocking and unstable power swing tripping schemes during disturbances of electrical networks is disclosed. The disclosed system and method eliminates the requirement of stability studies. The no-setting scheme utilizes the swing center voltage of the electrical network to carry out its functions.
摘要翻译： 公开了一种用于在电网干扰期间实现功率摆动阻塞和不稳定功率摆幅跳闸方案的系统和方法。 所公开的系统和方法消除了稳定性研究的要求。 无设定方案利用电网的摆动中心电压来实现其功能。
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