公开(公告)号：US20090147414A1

公开(公告)日：2009-06-11

申请号：US12104273

申请日：2008-04-16

申请人： DAVID LAZAROVICH ,  Srinivasa Rao Dangeti ,  Subodh Keshri ,  Ileana Rusan ,  Sanjay Kumar Chaudhary

发明人： DAVID LAZAROVICH ,  Srinivasa Rao Dangeti ,  Subodh Keshri ,  Ileana Rusan ,  Sanjay Kumar Chaudhary

IPC分类号： H02H9/08 ,  G01R31/14

CPC分类号： H02H9/08 ,  G01R31/025

摘要： An ungrounded electrical power distribution system may experience a single line to ground fault. Such a fault may not disrupt operation of the system, but its presence may raise a risk of additional problems if left uncorrected. A system for progressively grounding the ungrounded system may be initiated when a line to ground fault is suspected. As grounding through successively lower impedance proceeds, fault current may increase and detection of severity of the line to ground fault may be more readily achieved, thus facilitating localization of the fault.

摘要翻译： 未接地的配电系统可能会遇到单线对地故障。 这样的错误可能不会扰乱系统的运行，但是如果未经校正，其存在可能会导致其他问题的风险。 当怀疑线对地故障时，可以启动用于逐渐接地未接地系统的系统。 由于通过连续较低的阻抗进行接地，故障电流可能增加，并且可以更容易地实现线对地故障的严重性的检测，从而有助于故障的定位。

公开(公告)号：US07986500B2

公开(公告)日：2011-07-26

申请号：US12104273

申请日：2008-04-16

申请人： David Lazarovich ,  Srinivasa Rao Dangeti ,  Subodh Keshri ,  Ileana Rusan ,  Sanjay Kumar Chaudhary

发明人： David Lazarovich ,  Srinivasa Rao Dangeti ,  Subodh Keshri ,  Ileana Rusan ,  Sanjay Kumar Chaudhary

IPC分类号： H02H3/00 ,  H02H9/08

CPC分类号： H02H9/08 ,  G01R31/025

摘要： An ungrounded electrical power distribution system may experience a single line to ground fault. Such a fault may not disrupt operation of the system, but its presence may raise a risk of additional problems if left uncorrected. A system for progressively grounding the ungrounded system may be initiated when a line to ground fault is suspected. As grounding through successively lower impedance proceeds, fault current may increase and detection of severity of the line to ground fault may be more readily achieved, thus facilitating localization of the fault.

摘要翻译： 未接地的配电系统可能会遇到单线对地故障。 这样的错误可能不会扰乱系统的运行，但是如果未经校正，其存在可能会导致其他问题的风险。 当怀疑线对地故障时，可以启动用于逐渐接地未接地系统的系统。 由于通过连续较低的阻抗进行接地，故障电流可能增加，并且可以更容易地实现线对地故障的严重性的检测，从而有助于故障的定位。

公开(公告)号：US20100259859A1

公开(公告)日：2010-10-14

申请号：US12422126

申请日：2009-04-10

申请人： Prashant Purushotham Prabhu K ,  Sanjay Kumar Chaudhary ,  Zhenning Liu

发明人： Prashant Purushotham Prabhu K ,  Sanjay Kumar Chaudhary ,  Zhenning Liu

IPC分类号： H02H7/26

CPC分类号： H02H7/30 ,  H02H1/0015

摘要： A coordinated arc fault protection scheme in a hierarchical power distribution system is disclosed. The methods according to embodiments of the present invention may be considered an “event and time graded” analysis. In event and time based analysis, the number of confirmed arc signature may be monitored with respect to time in the main feeder line as well as the branched feeders. The confirmed arc signature in the branched feeder, as well as in the main feeder, may be captured and time stamped. A trip command may be issued first in the intended branched feeder if the branched feeder experiences a minimum number of events within a given time. During the same time period, the main feeder also monitors similar arcing events. If the tripping of the branched feeder occurs and the main feeder still detects arcing events, the main feeder may be tripped after a certain period of time or a certain number of confirmed arc signature. If there is no arc in the branched feeder and the main feeder itself experiences the arc, then the main feeder may be tripped after a predetermined period of time so that the current to all the branched feeders may be cut and the main feeder may be protected.

摘要翻译： 公开了一种分层配电系统中的协调电弧故障保护方案。 根据本发明的实施例的方法可以被认为是“事件和时间分级”分析。 在事件和时间分析中，可以相对于主馈线中的时间以及分支馈线来监视确认的电弧签名的数量。 分支进料器以及主进料器中的确认的电弧特征可以被捕获和时间戳。 如果分支馈线在给定时间内经历最少数量的事件，则可以在预期的分支馈线中首先发出跳闸命令。 在同一时间段内，主馈线还监控类似的电弧事件。 如果分支式进料器发生跳闸并且主进料器仍然检测到电弧事件，则主进料器可能在一定时间段或一定数量的确认的电弧特征之后被跳闸。 如果分支进料器中没有电弧，主进料器本身经历电弧，则主进料器可能在预定时间段后跳闸，从而可以切割到所有分支进料器的电流，并且可以保护主进料器 。

公开(公告)号：US08233254B2

公开(公告)日：2012-07-31

申请号：US12422126

申请日：2009-04-10

申请人： Prashant Purushotham Prabhu K ,  Sanjay Kumar Chaudhary ,  Zhenning Liu

发明人： Prashant Purushotham Prabhu K ,  Sanjay Kumar Chaudhary ,  Zhenning Liu

IPC分类号： H02H3/00 ,  H02H7/00

CPC分类号： H02H7/30 ,  H02H1/0015

摘要： A coordinated arc fault protection scheme in a hierarchical power distribution system is disclosed. The methods according to embodiments of the present invention may be considered an “event and time graded” analysis. In event and time based analysis, the number of confirmed arc signature may be monitored with respect to time in the main feeder line as well as the branched feeders. The confirmed arc signature in the branched feeder, as well as in the main feeder, may be captured and time stamped. A trip command may be issued first in the intended branched feeder if the branched feeder experiences a minimum number of events within a given time. During the same time period, the main feeder also monitors similar arcing events. If the tripping of the branched feeder occurs and the main feeder still detects arcing events, the main feeder may be tripped after a certain period of time or a certain number of confirmed arc signature. If there is no arc in the branched feeder and the main feeder itself experiences the arc, then the main feeder may be tripped after a predetermined period of time so that the current to all the branched feeders may be cut and the main feeder may be protected.

摘要翻译： 公开了一种分层配电系统中的协调电弧故障保护方案。 根据本发明的实施例的方法可以被认为是“事件和时间分级”分析。 在事件和时间分析中，可以相对于主馈线中的时间以及分支馈线来监视确认的电弧签名的数量。 分支进料器以及主进料器中的确认的电弧特征可以被捕获和时间戳。 如果分支馈线在给定时间内经历最少数量的事件，则可以在预期的分支馈线中首先发出跳闸命令。 在同一时间段内，主馈线还监控类似的电弧事件。 如果分支式进料器发生跳闸并且主进料器仍然检测到电弧事件，则主进料器可能在一定时间段或一定数量的确认的电弧特征之后被跳闸。 如果分支进料器中没有电弧，主进料器本身经历电弧，则主进料器可能在预定时间段后跳闸，从而可以切割到所有分支进料器的电流，并且可以保护主进料器 。

公开(公告)号：US08004287B2

公开(公告)日：2011-08-23

申请号：US12395402

申请日：2009-02-27

申请人： Prashant Purushotham Prabhu K ,  Sanjay Kumar Chaudhary ,  Zhenning Liu

发明人： Prashant Purushotham Prabhu K ,  Sanjay Kumar Chaudhary ,  Zhenning Liu

IPC分类号： G01R31/08

CPC分类号： G01R31/1272 ,  G01R31/008 ,  G01R31/021 ,  H02H1/0015

摘要： Methods for detecting wet arc faults are based on the direct current (DC) signature analysis and pattern matching pertaining to wet arc characteristics. While magnifying some wet arc fault signatures, it may be found that the wet arc current signal itself resembles a normal current signal in both time and frequency domains. The change in magnitude or high frequency behavior found may not be enough to distinguish a wet arc fault signature from a normal signature. Embodiments of the present invention may look at the magnitude change in the DC content per cycle of the wet arc current signal, which may be more positive in one cycle while, in the next cycle, it may be negative in a relative manner. A particular number of these changes may be determinative of a wet arc fault.

摘要翻译： 用于检测湿弧故障的方法是基于直流（DC）特征分析和湿电弧特性的模式匹配。 当放大一些湿电弧故障签名时，可以发现湿电弧电流信号本身类似于时域和频域中的正常电流信号。 发现的幅度或高频特性的变化可能不足以区分湿电弧故障签名与正常签名。 本发明的实施例可以观察湿式电弧电流信号的每个循环的直流含量的幅度变化，其在一个周期中可以更正，而在下一个周期中，它可以以相对的方式为负。 这些变化的特定数量可能决定湿电弧故障。

公开(公告)号：US07969696B2

公开(公告)日：2011-06-28

申请号：US12104298

申请日：2008-04-16

申请人： David Lazarovich ,  Srinivasa Rao Dangeti ,  Subodh Keshri ,  Ileana Rusan ,  Sanjay Kumar Chaudhary

发明人： David Lazarovich ,  Srinivasa Rao Dangeti ,  Subodh Keshri ,  Ileana Rusan ,  Sanjay Kumar Chaudhary

IPC分类号： H02H3/16 ,  H02H9/08

CPC分类号： H02H9/08 ,  G01R31/025

摘要： An ungrounded or floating DC electrical power distribution system may experience a single line to ground fault. Such a fault may not disrupt operation of the system, but its presence may raise a risk of additional problems if left uncorrected. A system for progressively grounding the ungrounded system may be initiated when a line to ground fault is suspected based on the voltage difference measured to a common chassis point. As grounding through successively lower impedance proceeds, fault current may increase and detection of severity of the line to ground fault may be more readily achieved, thus facilitating localization of the fault. Localization may be achieved through an analysis of direction of capacitive currents in isolatable zones of the system.

摘要翻译： 未接地或浮动的直流配电系统可能会遇到单线对地故障。 这样的错误可能不会扰乱系统的运行，但是如果未经校正，其存在可能会导致其他问题的风险。 当基于测量到公共底盘点的电压差，怀疑线对地故障时，可以启动用于逐渐接地未接地系统的系统。 由于通过连续较低的阻抗进行接地，故障电流可能增加，并且可以更容易地实现线对地故障的严重性的检测，从而有助于故障的定位。 可以通过分析系统可隔离区域中的电容电流方向来实现本地化。

公开(公告)号：US20100219838A1

公开(公告)日：2010-09-02

申请号：US12395402

申请日：2009-02-27

申请人： Prashant Purushotham Prabhu K ,  Sanjay Kumar Chaudhary ,  Zhenning Liu

发明人： Prashant Purushotham Prabhu K ,  Sanjay Kumar Chaudhary ,  Zhenning Liu

IPC分类号： G01R31/12

CPC分类号： G01R31/1272 ,  G01R31/008 ,  G01R31/021 ,  H02H1/0015

摘要： Methods for detecting wet arc faults are based on the direct current (DC) signature analysis and pattern matching pertaining to wet arc characteristics. While magnifying some wet arc fault signatures, it may be found that the wet arc current signal itself resembles a normal current signal in both time and frequency domains. The change in magnitude or high frequency behavior found may not be enough to distinguish a wet arc fault signature from a normal signature. Embodiments of the present invention may look at the magnitude change in the DC content per cycle of the wet arc current signal, which may be more positive in one cycle while, in the next cycle, it may be negative in a relative manner. A particular number of these changes may be determinative of a wet arc fault.

摘要翻译： 用于检测湿弧故障的方法是基于直流（DC）特征分析和湿电弧特性的模式匹配。 当放大一些湿电弧故障签名时，可以发现湿电弧电流信号本身类似于时域和频域中的正常电流信号。 发现的幅度或高频特性的变化可能不足以区分湿电弧故障签名与正常签名。 本发明的实施例可以观察湿式电弧电流信号的每个循环的直流含量的幅度变化，其在一个周期中可以更正，而在下一个周期中，它可以以相对的方式为负。 这些变化的特定数量可能决定湿电弧故障。

公开(公告)号：US20090147415A1

公开(公告)日：2009-06-11

申请号：US12104298

申请日：2008-04-16

申请人： DAVID LAZAROVICH ,  Srinivasa Rao Dangeti ,  Subodh Keshri ,  Ileana Rusan ,  Sanjay Kumar Chaudhary

发明人： DAVID LAZAROVICH ,  Srinivasa Rao Dangeti ,  Subodh Keshri ,  Ileana Rusan ,  Sanjay Kumar Chaudhary

IPC分类号： H02H9/08 ,  G01R31/14

CPC分类号： H02H9/08 ,  G01R31/025

摘要： An ungrounded or floating DC electrical power distribution system may experience a single line to ground fault. Such a fault may not disrupt operation of the system, but its presence may raise a risk of additional problems if left uncorrected. A system for progressively grounding the ungrounded system may be initiated when a line to ground fault is suspected based on the voltage difference measured to a common chassis point. As grounding through successively lower impedance proceeds, fault current may increase and detection of severity of the line to ground fault may be more readily achieved, thus facilitating localization of the fault. Localization may be achieved through an analysis of direction of capacitive currents in isolatable zones of the system.

摘要翻译： 未接地或浮动的直流配电系统可能会遇到单线对地故障。 这样的错误可能不会扰乱系统的运行，但是如果未经校正，其存在可能会导致其他问题的风险。 当基于测量到公共底盘点的电压差，怀疑线对地故障时，可以启动用于逐渐接地未接地系统的系统。 由于通过连续较低的阻抗进行接地，故障电流可能增加，并且可以更容易地实现线对地故障的严重性的检测，从而有助于故障的定位。 可以通过分析系统可隔离区域中的电容电流方向来实现本地化。