公开(公告)号：US20110187206A1

公开(公告)日：2011-08-04

申请号：US12696971

申请日：2010-01-29

申请人： David G. Hart ,  Charles H. Jones

发明人： David G. Hart ,  Charles H. Jones

IPC分类号： F16P3/00 ,  G06F19/00

CPC分类号： G01R22/061 ,  G01D4/02 ,  Y02B90/246 ,  Y04S20/42

摘要： Safety in an electricity metering environment is improved by providing an additional level of safety interlocking to disconnect switches and other control relays in electricity meters.

摘要翻译： 通过提供额外的安全联锁水平来改善电力计量环境中的安全性，以断开电表中的开关和其他控制继电器。

公开(公告)号：US06738719B2

公开(公告)日：2004-05-18

申请号：US09951925

申请日：2001-09-13

申请人： James D. Stoupis ,  David Lubkeman ,  Reto Buettner ,  David G. Hart

发明人： James D. Stoupis ,  David Lubkeman ,  Reto Buettner ,  David G. Hart

IPC分类号： G01R3100

CPC分类号： H02H1/00 ,  H02H3/385 ,  H02H7/267

摘要： The invention describes a method, system, device, and computer-readable medium having computer-executable instructions for classifying faults on an electrical power line. In particular, the invention permits the classification of crossover faults, using a local measurement technique. The inventive method includes providing a first electrical power transmission line and a second electrical power transmission line, and monitoring the first electrical power transmission line to identify a crossover fault occurring between the first and the second electrical power transmission lines.

公开(公告)号：US06707655B2

公开(公告)日：2004-03-16

申请号：US09749195

申请日：2000-12-27

申请人： Jeffrey L. McElray, Sr. ,  Carl J. LaPlace ,  David G. Hart ,  William M. Egolf ,  Graeme N. McClure

发明人： Jeffrey L. McElray, Sr. ,  Carl J. LaPlace ,  David G. Hart ,  William M. Egolf ,  Graeme N. McClure

IPC分类号： H02H300

CPC分类号： H02H3/06 ,  H02H3/006

摘要： A recloser is adaptively controlled so that it will operate in a manner responsive to prevailing conditions such as time of day, day of week, and/or load current. A protection setting group is stored in a memory accessible by the recloser controller, and contains a set of instructions for controlling the recloser based on the prevailing conditions. The prevailing conditions are continuously monitored, and the control of the recloser is based on the prevailing conditions and the protection setting group.

公开(公告)号：US06510436B1

公开(公告)日：2003-01-21

申请号：US09522200

申请日：2000-03-09

申请人： David G. Hart

发明人： David G. Hart

IPC分类号： G06F1730

CPC分类号： G06F17/30705 ,  Y10S707/99943

摘要： A system and method for clustering data from a server computer and sent to a client computer. The server computer obtains a requested cluster size for the client computer. The requested cluster size includes the optimal size cluster the client computer can handle and the largest manageable cluster size that can be handled by the client. Fuzzy logic computations are performed on the data to determine an optimal cluster size and an optimal point at which to split the data for the particular client. Part of the cluster computations are based upon the affinity of individual data items to adjacent data items in the clustered list. The server computer also checks the affinity between the item with the largest score and the first item in the next cluster. If this affinity is higher than other affinity scores within the cluster, the cluster split is moved accordingly. Once an optimal cluster is determined, the data is transmitted from the server computer to the client computer.

摘要翻译： 用于从服务器计算机聚集数据并发送到客户端计算机的系统和方法。 服务器计算机为客户端计算机获取所请求的群集大小。 所请求的群集大小包括客户端计算机可以处理的最佳大小群集以及可由客户端处理的最大可管理群集大小。 对数据执行模糊逻辑计算，以确定最佳的群集大小和为特定客户端分割数据的最佳点。 集群计算的一部分基于各个数据项与聚类列表中相邻数据项的亲和度。 服务器计算机还检查具有最大分数的项与下一个集群中的第一个项之间的关联性。 如果此亲和力高于群集中的其他亲和度分数，则相应地移动群集拆分。 一旦确定了最佳集群，数据就从服务器计算机发送到客户端计算机。

公开(公告)号：US6081768A

公开(公告)日：2000-06-27

申请号：US929927

申请日：1997-09-15

申请人： Yi Hu ,  David G. Hart ,  Joseph P. Benco ,  James D. Stoupis

发明人： Yi Hu ,  David G. Hart ,  Joseph P. Benco ,  James D. Stoupis

IPC分类号： G01R19/04 ,  H02H7/04 ,  H02H3/00

CPC分类号： G01R19/04 ,  H02H7/04

摘要： A method and system for detecting the peak of respective half-cycles of a sinusoidal waveform. The sinusoidal waveform is rectified and only sample points above a first threshold are analyzed. The peaks of each half-cycle are only accepted if they are above a second, greater threshold. Peaks below the second threshold are not accepted. The peaks themselves are detected by starting a counter at the first sample in the rectified waveform which is above the first threshold value. Once the rectified waveform descends below the first threshold, the counter is stopped and the maximum value of the previous k samples is the peak value, where k is the counter value for the successive samples above the first threshold. The peak value so determined is rejected if it is less than the second threshold value. On the other hand, when the peak value is above the second threshold, it is averaged with the last valid peak value (above the second threshold). Thus, the V/Hz value remains the same until a new, valid peak is determined. A preferred embodiment implements such a digital peak detector in a digital relay system for detecting overexcitation of a power system.

摘要翻译： 用于检测正弦波形的各个半周期的峰值的方法和系统。 正弦波形被整流，并且仅分析高于第一阈值的采样点。 每个半周期的峰值只有在高于第二个较大的阈值时才被接受。 低于第二个阈值的峰值不被接受。 通过在高于第一阈值的整流波形中的第一采样处启动计数器来检测峰值本身。 一旦整流波形下降到第一阈值以下，则停止计数器，并且先前k个采样的最大值是峰值，其中k是高于第一阈值的连续采样的计数器值。 如果确定的峰值小于第二阈值，则其被拒绝。 另一方面，当峰值高于第二阈值时，用最后的有效峰值（高于第二阈值）进行平均。 因此，在确定新的有效峰值之前，V / Hz值保持不变。 优选实施例在数字中继系统中实现这种数字峰值检测器，用于检测电力系统的过激励。

公开(公告)号：US07545285B2

公开(公告)日：2009-06-09

申请号：US11355690

申请日：2006-02-16

申请人： Kenneth C. Shuey ,  Andrew J. Borleske ,  Robert T. Mason, Jr. ,  David G. Hart

发明人： Kenneth C. Shuey ,  Andrew J. Borleske ,  Robert T. Mason, Jr. ,  David G. Hart

IPC分类号： G08C19/16

CPC分类号： G01D4/004 ,  Y02B90/242 ,  Y02B90/244 ,  Y02B90/246 ,  Y04S20/322 ,  Y04S20/327 ,  Y04S20/42

摘要： A load control system that communicates with existing automated meter reading communications systems to interrupt and shed loads at a customer location. The system includes a master controller that listens to communications between a utility meter and the reading system. The controller receives tier and/or pricing information and will instruct a load control unit to interrupt certain loads based on the information. In addition, the system may be employed as a load shedding system where a command may be forwarded to the master controller to disconnect loads based on action levels. The command may be sent via a TCP/IP communications system to a node in the reading system and the forwarded via a radio network to the master controller to reduce latency. Predictive shedding may be performed based on forecast loads.

摘要翻译： 与现有的自动抄表通信系统通信的负载控制系统，以在客户位置中断和流出负载。 该系统包括主控制器，用于监听公用事业电表和读取系统之间的通信。 控制器接收层和/或定价信息，并将指示负载控制单元根据该信息中断某些负载。 此外，该系统可以用作卸载系统，其中命令可以被转发到主控制器以基于动作级别断开负载。 该命令可以通过TCP / IP通信系统发送到读取系统中的节点，并通过无线电网络转发到主控制器以减少延迟。 预测脱落可以基于预测负荷进行。

公开(公告)号：US06867958B2

公开(公告)日：2005-03-15

申请号：US09749192

申请日：2000-12-27

申请人： Graeme N. McClure ,  Jeffrey L. McElray, Sr. ,  Robert A. Smith ,  Carl LaPlace ,  David G. Hart ,  William M. Egolf

发明人： Graeme N. McClure ,  Jeffrey L. McElray, Sr. ,  Robert A. Smith ,  Carl LaPlace ,  David G. Hart ,  William M. Egolf

IPC分类号： H02H3/06 ,  H02H7/26 ,  H02H3/00

CPC分类号： H02H7/266 ,  H02H3/063

摘要： A system and methods that enable a restoration scheme for power distribution systems that is independent of power distribution system component configuration, the number of power distribution system components, and component settings are provided. In a power distribution system, a number of intelligent reclosers having restoration control modules are deployed that execute a restoration scheme. The intelligent reclosers constantly poll cooperating power distribution lines to determine changes in current or voltage provided by the power distribution lines. In the event of a power distribution system fault, the reclosers act in accordance to a predefined restoration scheme to reanimate the unaffected portions of the failing power distribution system.

摘要翻译： 提供了独立于配电系统组件配置，配电系统组件数量和组件设置的配电系统的恢复方案的系统和方法。 在配电系统中，部署了具有执行恢复方案的具有恢复控制模块的多个智能重合器。 智能重合器不断轮询合作配电线路以确定配电线路提供的电流或电压的变化。 在发生配电系统故障的情况下，重合器根据预定义的恢复方案起作用以重新启动故障配电系统的未受影响部分。

公开(公告)号：US06747373B1

公开(公告)日：2004-06-08

申请号：US10034063

申请日：2001-12-26

申请人： Yi Hu ,  Luciano Di Maio ,  Fabio Gatelli ,  William M. Egolf ,  David G. Hart

发明人： Yi Hu ,  Luciano Di Maio ,  Fabio Gatelli ,  William M. Egolf ,  David G. Hart

IPC分类号： G05F300

CPC分类号： H02M1/12 ,  Y10T307/826

摘要： System and methods for coordinating the control system of a switched power capacitor with an integrated resonance protection function. The coordination system coordinates the function of a switched power capacitor's primary control system and resonance protection system to avoid duplication of tasks and on/off operation deadlock. The coordination system adjusting calculations made by the primary control system in response to a determination of a harmonic resonance condition by the resonance protection system.

摘要翻译： 用于协调具有集成谐振保护功能的开关式电力电容器的控制系统的系统和方法。 协调系统协调开关电源电容器的主控制系统和共振保护系统的功能，以避免重复任务和开/关操作死锁。 协调系统根据由谐振保护系统确定的谐波共振状态来调整主控系统进行的计算。

公开(公告)号：US06735534B2

公开(公告)日：2004-05-11

申请号：US09810810

申请日：2001-03-16

申请人： Graeme N. McClure ,  Carl J. LaPlace ,  David G. Hart ,  William M. Egolf

发明人： Graeme N. McClure ,  Carl J. LaPlace ,  David G. Hart ,  William M. Egolf

IPC分类号： G01R3100

CPC分类号： H02H3/06

摘要： A recloser trips on one phase for single-phase only fault conditions, or all phases for multi-phase fault conditions. During power delivery, the recloser monitors the three phases of a power line (e.g., phases A, B, and C). If a fault is detected on one phase, then a timer is started and subsequently decremented. If the timer finishes counting down while the fault is still present, then it is determined if any of the other two phases are timing a fault. If so, then all three phases are tripped; otherwise, only the faulted phase is tripped.

摘要翻译： 重合器在单相故障条件的一相中跳闸，或多相故障条件的所有相。 在电力输送期间，重合器监测电力线（例如，相A，B和C）的三相。 如果在一个相位上检测到故障，则启动定时器并随后递减。 如果定时器在故障仍然存在时完成倒计时，则确定其他两个相位中是否存在故障定时。 如果是这样，那么所有三个阶段都会跳闸; 否则，只有故障相位跳闸。

公开(公告)号：US06397156B1

公开(公告)日：2002-05-28

申请号：US09192851

申请日：1998-11-17

申请人： Bernhard Bachmann ,  David G. Hart ,  Yi Hu ,  Damir Novosel ,  Murari M. Saha

发明人： Bernhard Bachmann ,  David G. Hart ,  Yi Hu ,  Damir Novosel ,  Murari M. Saha

IPC分类号： G01R2500

CPC分类号： H02H3/40 ,  H02H1/04

摘要： An accurate impedance measurement method for a power system transmission line is disclosed for improving various protection functions, i.e., distance protection and/or fault location estimation. The method is less sensitive to harmonics and other transient problems introduced to power systems by series capacitance and the like, and is easily incorporated into existing protective relays. In the method, a number (n) of current and voltage samples (Ik, Vk) representative of values of current and voltage waveforms are measured, respectively, at successive instants of time on a conductor in a power system. The number n is an integer greater than I and the index k takes on values of 1 to n. Resistance (R) and inductance (L) values are computed in accordance with an equation in which R and L are related to sums of differences in values of successive current and voltage samples. A prescribed power system function is then performed based on the computed R and L values.

摘要翻译： 公开了一种用于电力系统传输线路的精确阻抗测量方法，用于改进各种保护功能，即距离保护和/或故障位置估计。 该方法对通过串联电容等引入电力系统的谐波和其他瞬态问题较不敏感，并且容易地并入现有的保护继电器中。 在该方法中，分别在电力系统中的导体上的连续时刻分别测量表示电流和电压波形值的电流和电压样本数（Ik，Vk）的数量（n）。 数字n是大于I的整数，索引k取值为1到n。 电阻（R）和电感（L）值根据其中R和L与连续电流和电压样本的值的差的和相关的方程式来计算。 然后根据计算的R和L值执行规定的电力系统功能。