公开(公告)号：US10416221B2

公开(公告)日：2019-09-17

申请号：US13982297

申请日：2011-03-17

申请人： Ying Yang ,  Youyi Li ,  G. Pradeep

发明人： Ying Yang ,  Youyi Li ,  G. Pradeep

IPC分类号： G01R31/00 ,  G01R31/02 ,  G01R31/08 ,  G01R27/00 ,  H02H3/06 ,  H02H7/26 ,  H02H3/08 ,  H02H3/40 ,  G06F19/00 ,  G01D21/00 ,  G06F17/40

摘要： The present invention provides a method for current for fault identification in a transmission line and an apparatus thereof. The method comprises the following steps: measuring the real-time values of the currents and the voltages of the other unbroken healthy phase conductors when a single-phase fault occurs; calculating the inductive voltage and the capacitive coupling voltage according to the measured currents and voltages respectively; comparing the capacitive coupling voltage with the inductive voltage multiplied by a factor, in which the multiplication result is used as a self-adjusted threshold based on the real time load condition of the transmission line; and identifying the fault type based on the maximum of the capacitive coupling voltage and the multiplication.

公开(公告)号：US10393810B2

公开(公告)日：2019-08-27

申请号：US14405292

申请日：2012-06-06

申请人： Youyi Li ,  Kai Liu ,  Bin Su

发明人： Youyi Li ,  Kai Liu ,  Bin Su

IPC分类号： G01R31/327 ,  H02H3/28

摘要： The present invention discloses a method for identifying the fault by current differential protection and a device thereof. The method comprises: measuring the full component currents of the two terminals of a two-terminal line system and calculating the corresponding fault component current vectors; obtaining an operate value by calculating a first difference between an absolute value of the sum of the fault component current vectors and Iset1; obtaining a restrain value by multiplying a second difference with a control factor, in which the second difference is calculated between the maximum of the absolute values of the fault component currents and Iset2 or between the absolute value of the difference of said fault component currents and Iset2; and identifying a fault as an external one or internal one by comparing the operate value with the restrain value. The solutions of the present invention achieve better reliability, sensitivity and faster speed than existing products.

公开(公告)号：US09042412B2

公开(公告)日：2015-05-26

申请号：US13390962

申请日：2009-12-31

申请人： Bin Su ,  Youyi Li ,  Torbjorn Einarsson

发明人： Bin Su ,  Youyi Li ,  Torbjorn Einarsson

IPC分类号： H04J3/06 ,  H02H1/00 ,  H02H3/30

CPC分类号： H04J3/0682 ,  H02H1/0061 ,  H02H3/30 ,  H04J3/065 ,  H04J3/0658

摘要： The invention provides a method and apparatus for detecting communication channel delay asymmetry between transmission line protection devices. The method comprises: calculating, repeatedly, clock disparity between clocks of the protection devices and communication delays at different paths of the communication channel; comparing the latest calculated clock disparity and communication delays with previously calculated clock disparities and communication delays, respectively; determining a channel switching has happened if a change of the calculated clock disparity exceeds a first threshold, or a change of the calculated communication delays for any path exceeds a second threshold; and determining the channel delays as asymmetrical if a difference between the calculated communication delays of the different paths after the channel switching exceeds a third threshold.

摘要翻译： 本发明提供一种用于检测传输线路保护装置之间的通信信道延迟不对称的方法和装置。 该方法包括：重复地计算保护装置的时钟之间的时钟差异和在通信信道的不同路径处的通信延迟; 将最新计算的时钟差异和通信延迟与先前计算的时钟差异和通信延迟进行比较; 如果所计算的时钟视差的改变超过第一阈值或者所计算的任何路径的通信延迟的改变超过第二阈值，则确定频道切换已经发生; 以及如果在频道切换之后所计算的不同路径的通信延迟之间的差超过第三阈值，则将所述信道延迟确定为不对称。

公开(公告)号：US20130057255A1

公开(公告)日：2013-03-07

申请号：US13578282

申请日：2011-04-25

申请人： Tiexin Hou ,  Zhengliang Bu ,  Shun Hu ,  Zhigui Xu ,  Youyi Li ,  Zhengtao Zhao ,  Leping Zhang

发明人： Tiexin Hou ,  Zhengliang Bu ,  Shun Hu ,  Zhigui Xu ,  Youyi Li ,  Zhengtao Zhao ,  Leping Zhang

IPC分类号： G01R1/20

CPC分类号： G01D4/002 ,  G01R21/006 ,  G01R21/06 ,  Y02B90/241 ,  Y02B90/246 ,  Y04S20/32 ,  Y04S20/42

摘要： An integrated device suspended at a high voltage potential for the metering and protection of a distribution network comprises a measurement current transformer (CT), a protective CT and a voltage sensor. The voltage signal is output from the voltage sensor to an electric energy metering module and first and second electric signal acquiring modules. The current signal acquired by the measurement CT is output to the electric energy metering module. The current signal acquired by the protective CT is output to the first and second electric signal acquiring modules. The electric energy metering module processes the current and voltage signals and sends the processed data to a comprehensive control module. The first and second electric signal acquiring modules send the voltage and current data to the comprehensive control module. The comprehensive control module comprehensively calculates the received data and sends the result to a low voltage terminal.

摘要翻译： 用于计量和保护配电网的高电压悬挂的集成装置包括测量电流互感器（CT），保护CT和电压传感器。 电压信号从电压传感器输出到电能计量模块和第一和第二电信号采集模块。 通过测量CT获取的当前信号被输出到电能计量模块。 由保护CT获取的电流信号被输出到第一和第二电信号采集模块。 电能计量模块处理电流和电压信号，并将处理的数据发送到综合控制模块。 第一和第二电信号采集模块将电压和电流数据发送到综合控制模块。 综合控制模块全面计算接收到的数据，并将结果发送到低压端子。

公开(公告)号：US20120206149A1

公开(公告)日：2012-08-16

申请号：US13503711

申请日：2009-11-18

申请人： Bin Su ,  Youyi Li ,  Ying Yang

发明人： Bin Su ,  Youyi Li ,  Ying Yang

IPC分类号： G01R31/12

CPC分类号： H02H3/402

摘要： The invention relates to a ground distance protection method, which comprises: measure local source impedance based on fault component at both ends (M, N) of the transmission line in the case of a ground distance fault has occurred. Send the measured local source impedance from a first end to a second end. Adjust a protection criterion at the second end based on the measured impedance. And, judge the ground fault as an internal fault or an external fault according to the adjusted protection criterion. The invention also relates to a controller, a piece of software and an apparatus for implementing the same function.

摘要翻译： 本发明涉及一种地面距离保护方法，其包括：在发生地面距离故障的情况下，基于传输线两端（M，N）的故障分量测量局部源阻抗。 将测量的本地源阻抗从第一端发送到第二端。 根据测量的阻抗调整第二端的保护标准。 并根据调整后的保护标准判断接地故障为内部故障或外部故障。 本发明还涉及一种用于实现相同功能的控制器，软件和装置。

公开(公告)号：US20120147941A1

公开(公告)日：2012-06-14

申请号：US13390962

申请日：2009-12-31

申请人： Bin Su ,  Youyi Li ,  Torbjorn Einarsson

发明人： Bin Su ,  Youyi Li ,  Torbjorn Einarsson

IPC分类号： H04B17/00

CPC分类号： H04J3/0682 ,  H02H1/0061 ,  H02H3/30 ,  H04J3/065 ,  H04J3/0658

摘要： The invention provides a method and apparatus for detecting communication channel delay asymmetry between transmission line protection devices. The method comprises: calculating, repeatedly, clock disparity between clocks of the protection devices and communication delays at different paths of the communication channel; comparing the latest calculated clock disparity and communication delays with previously calculated clock disparities and communication delays, respectively; determining a channel switching has happened if a change of the calculated clock disparity exceeds a first threshold, or a change of the calculated communication delays for any path exceeds a second threshold; and determining the channel delays as asymmetrical if a difference between the calculated communication delays of the different paths after the channel switching exceeds a third threshold.

摘要翻译： 本发明提供一种用于检测传输线路保护装置之间的通信信道延迟不对称的方法和装置。 该方法包括：重复地计算保护装置的时钟之间的时钟差异和在通信信道的不同路径处的通信延迟; 将最新计算的时钟差异和通信延迟与先前计算的时钟差异和通信延迟进行比较; 如果所计算的时钟视差的改变超过第一阈值或者所计算的任何路径的通信延迟的改变超过第二阈值，则确定频道切换已经发生; 以及如果在频道切换之后所计算的不同路径的通信延迟之间的差超过第三阈值，则将所述信道延迟确定为不对称。

公开(公告)号：US09018938B2

公开(公告)日：2015-04-28

申请号：US13578282

申请日：2011-04-25

申请人： Tiexin Hou ,  Zhengliang Bu ,  Shun Hu ,  Zhigui Xu ,  Youyi Li ,  Zhengtao Zhao ,  Leping Zhang

发明人： Tiexin Hou ,  Zhengliang Bu ,  Shun Hu ,  Zhigui Xu ,  Youyi Li ,  Zhengtao Zhao ,  Leping Zhang

IPC分类号： G01R1/00 ,  G01D4/00 ,  G01R21/00 ,  G01R21/06

CPC分类号： G01D4/002 ,  G01R21/006 ,  G01R21/06 ,  Y02B90/241 ,  Y02B90/246 ,  Y04S20/32 ,  Y04S20/42

摘要： An integrated device suspended at a high voltage potential for the metering and protection of a distribution network comprises a measurement current transformer (CT), a protective CT and a voltage sensor. The voltage signal is output from the voltage sensor to an electric energy metering module and first and second electric signal acquiring modules. The current signal acquired by the measurement CT is output to the electric energy metering module. The current signal acquired by the protective CT is output to the first and second electric signal acquiring modules. The electric energy metering module processes the current and voltage signals and sends the processed data to a comprehensive control module. The first and second electric signal acquiring modules send the voltage and current data to the comprehensive control module. The comprehensive control module comprehensively calculates the received data and sends the result to a low voltage terminal.

摘要翻译： 用于计量和保护配电网的高电压悬挂的集成装置包括测量电流互感器（CT），保护CT和电压传感器。 电压信号从电压传感器输出到电能计量模块和第一和第二电信号采集模块。 通过测量CT获取的当前信号被输出到电能计量模块。 由保护CT获取的电流信号被输出到第一和第二电信号采集模块。 电能计量模块处理电流和电压信号，并将处理的数据发送到综合控制模块。 第一和第二电信号采集模块将电压和电流数据发送到综合控制模块。 综合控制模块全面计算接收到的数据，并将结果发送到低压端子。

公开(公告)号：US20160006240A1

公开(公告)日：2016-01-07

申请号：US14770240

申请日：2013-04-07

申请人： YOUYI LI ,  KAI LIU ,  IVO BRNCIC ,  ZHANPENG SHI ,  ABB TECHNOLOGY LTD.

发明人： YOUYI LI ,  KAI LIU ,  IVO BRNCIC ,  ZHANPENG SHI

IPC分类号： H02H9/02

CPC分类号： H02H9/02 ,  H02H3/006 ,  H02H3/28 ,  H02H3/283 ,  H02H7/045

摘要： The present invention discloses a method for detecting a fault and a current differential protection system thereof. The method for detecting fault includes calculating fault component currents, calculating an operate current and a restraint current of all terminals, and adjusting an operate level by adapting an operate-restraint characteristic according to a fault component. The method has very small operating area for external faults, which makes the method very reliable even for the case with serious CT saturation. A very big operating area for internal faults makes the method very sensitive for internal faults even for a heavy load and high resistance fault.

摘要翻译： 本发明公开了一种故障检测方法及其电流差动保护系统。 检测故障的方法包括计算故障分量电流，计算所有终端的工作电流和约束电流，以及通过根据故障分量调整操作限制特性来调整操作电平。 该方法对外部故障的操作面积非常小，即使对于CT饱和严重的情况，该方法也非常可靠。 内部故障的非常大的操作区域使得该方法对于内部故障甚至对于重负载和高电阻故障也非常敏感。

公开(公告)号：US20150160297A1

公开(公告)日：2015-06-11

申请号：US14405292

申请日：2012-06-06

申请人： Youyi Li ,  Kai Lui ,  Bin Su

发明人： Youyi Li ,  Kai Lui ,  Bin Su

IPC分类号： G01R31/327

CPC分类号： G01R31/3278 ,  H02H3/28 ,  H02H3/283

摘要： The present invention discloses a method for identifying the fault by current differential protection and a device thereof. The method comprises: measuring the full component currents of the two terminals of a two-terminal line system and calculating the corresponding fault component current vectors; obtaining an operate value by calculating a first difference between an absolute value of the sum of the fault component current vectors and Iset1; obtaining a restrain value by multiplying a second difference with a control factor, in which the second difference is calculated between the maximum of the absolute values of the fault component currents and Iset2 or between the absolute value of the difference of said fault component currents and Iset2; and identifying a fault as an external one or internal one by comparing the operate value with the restrain value. The solutions of the present invention achieve better reliability, sensitivity and faster speed than existing products.

摘要翻译： 本发明公开了一种通过电流差动保护来识别故障的方法及其装置。 该方法包括：测量两端线路系统的两端的全分量电流，并计算相应的故障分量电流矢量; 通过计算故障分量电流矢量和Iset1的和的绝对值之间的第一差来获得操作值; 通过将第二差异与控制因子相乘获得抑制值，其中在故障分量电流的绝对值和Iset2的绝对值的最大值之间或在所述故障分量电流的差异的绝对值与Iset2之间计算第二差异 ; 并通过将操作值与限制值进行比较来识别故障为外部故障或外部故障。 与现有产品相比，本发明的解决方案具有更好的可靠性，灵敏度和更快的速度。

公开(公告)号：US20130317768A1

公开(公告)日：2013-11-28

申请号：US13982297

申请日：2011-03-17

申请人： Ying Yang ,  Youyi Li ,  G. Pradeep

发明人： Ying Yang ,  Youyi Li ,  G. Pradeep

IPC分类号： G01R31/02

CPC分类号： G01R31/025 ,  G01D21/00 ,  G01R27/00 ,  G01R31/021 ,  G01R31/08 ,  G06F17/40 ,  G06F19/00 ,  H02H3/06 ,  H02H3/083 ,  H02H3/402 ,  H02H3/405 ,  H02H7/26

摘要： The present invention provides a method for current for fault identification in a transmission line and an apparatus thereof. The method comprises the following steps: measuring the real-time values of the currents and the voltages of the other unbroken healthy phase conductors when a single-phase fault occurs; calculating the inductive voltage and the capacitive coupling voltage according to the measured currents and voltages respectively; comparing the capacitive coupling voltage with the inductive voltage multiplied by a factor, in which the multiplication result is used as a self-adjusted threshold based on the real time load condition of the transmission line; and identifying the fault type based on the maximum of the capacitive coupling voltage and the multiplication.

摘要翻译： 本发明提供一种用于传输线路中的故障识别电流的方法及其装置。 该方法包括以下步骤：当发生单相故障时，测量其他不间断健康相导体的电流和电压的实时值; 根据测量的电流和电压分别计算感应电压和电容耦合电压; 将电容耦合电压与乘以因子的感应电压进行比较，其中乘法结果用作基于传输线的实时负载条件的自调整阈值; 并基于电容耦合电压和乘法的最大值来识别故障类型。