公开(公告)号：US09851390B2

公开(公告)日：2017-12-26

申请号：US14530627

申请日：2014-10-31

申请人： Shanghai Jiao Tong University

发明人： Yadong Liu ,  Gehao Sheng ,  Jiejie Dai ,  Jiamei Liu ,  Yun Hu ,  Xiaolei Xie ,  Yong Qian ,  Yue Hu ,  Xiuchen Jiang

IPC分类号： G01R31/00 ,  G01R31/02 ,  G01R31/08 ,  H02H7/26 ,  H02H7/28

CPC分类号： G01R31/025 ,  G01R31/088 ,  H02H7/261 ,  H02H7/28

摘要： A method for detecting and locating faulty line on the distribution network circuit based on full waveform information, which uses the current data on the fault occurrence and whole-process operation of the compensation device to effectively solve such common problems as low fault current, poor reliability and low sensitivity in case of single-phase grounding fault to the low-current system through precise GPS synchronization. It improves the sensitivity and reliability of the grounding fault detection, which does not interfere with the system and is applicable to high-resistance grounding.

公开(公告)号：US09979423B2

公开(公告)日：2018-05-22

申请号：US14654571

申请日：2014-12-14

申请人： SHANGHAI JIAO TONG UNIVERSITY

发明人： Yue Hu ,  Xiuchen Jiang ,  Gehao Sheng ,  Lingyu Cao

IPC分类号： H04B1/04 ,  G01R31/14 ,  G01R31/12

CPC分类号： H04B1/0483 ,  G01R31/1209 ,  G01R31/14 ,  H04B1/0475

摘要： A parallel connection method and a device for multi-channel partial discharge (PD) signals have input sources of pre-processed and amplified signals received by multiple PD sensors. Then isolation and processing are provided to the signals to ensure that each signal is able to be self-triggered and unidirectional transmitted. Finally, processed signals of each channel are outputted. For ultra-high frequency (UHF) PD signal, the delay transmission is realized by a surface acoustic wave (SAW) delay line method. The present invention makes the amplified multi-channel PD signals self-trigger and unidirectional transmit though isolation processing and then realizes parallel connection without interference. The method also decreases signal transmission loss. Meanwhile, all the detected PD signals transmit on one signal bus through parallel connection method, so as to use only one set of acquisition unit to monitor and acquire the signals received by multiple sensors, which obviously lowers the system cost.

公开(公告)号：US20160187406A1

公开(公告)日：2016-06-30

申请号：US14659603

申请日：2015-03-16

申请人： Shanghai Jiao Tong University

发明人： Yadong LIU ,  Gehao Sheng ,  Yong Qian ,  Yue Hu ,  Xiuchen Jiang

IPC分类号： G01R31/02 ,  G01R31/12

CPC分类号： G01R31/021 ,  G01R29/0842 ,  G01R31/085 ,  G01R31/1272

摘要： A method for identifying a lightning fault of an overhead transmission line (OTL) comprising determining a polarity of a travelling wave of each of three ABC phases subsequent to a single phase outage of the OTL. If the polarity of each phase is the same, the outage is a lightning fault and its type a back flashover; if not the same, proceed to the second step to determine a current change rate R of the fault phase. If R is larger than a threshold value, the outage is a lightning fault and its type a shielding failure; otherwise, the outage is a single-phase grounding fault. A system for identifying the lightning fault which comprises successively at least a group of fault detectors, a wireless communication module, a remote monitoring master station which adopts the above method to determine the fault type of the overhead transmission line.

摘要翻译： 一种用于识别架空传输线（OTL）的雷电故障的方法，包括在所述OTL的单相中断之后确定三个ABC相中的每一个的行波的极性。 如果每相的极性相同，则断电是闪电故障，其类型为反闪电; 如果不相同，则继续进行第二步以确定故障阶段的当前变化率R. 如果R大于阈值，则中断是闪电故障，其类型为屏蔽故障; 否则，中断是单相接地故障。 一种用于识别闪电故障的系统，其包括连续至少一组故障检测器，无线通信模块，远程监控主站，其采用上述方法来确定架空传输线路的故障类型。

公开(公告)号：US20150349818A1

公开(公告)日：2015-12-03

申请号：US14654571

申请日：2014-12-14

申请人： SHANGHAI JIAO TONG UNIVERSITY

发明人： Yue Hu ,  Xiuchen Jiang ,  Gejap Sheng ,  Lingyu Cao

IPC分类号： H04B1/04

CPC分类号： H04B1/0483 ,  G01R31/1209 ,  G01R31/14 ,  H04B1/0475

摘要： A parallel connection method and a device for multi-channel partial discharge (PD) signals have input sources of pre-processed and amplified signals received by multiple PD sensors. Then isolation and processing are provided to the signals to ensure that each signal is able to be self-triggered and unidirectional transmitted. Finally, processed signals of each channel are outputted. For ultra-high frequency (UHF) PD signal, the delay transmission is realized by a surface acoustic wave (SAW) delay line method. The present invention makes the amplified multi-channel PD signals self-trigger and unidirectional transmit though isolation processing and then realizes parallel connection without interference. The method also decreases signal transmission loss. Meanwhile, all the detected PD signals transmit on one signal bus through parallel connection method, so as to use only one set of acquisition unit to monitor and acquire the signals received by multiple sensors, which obviously lowers the system cost.

摘要翻译： 并行连接方法和用于多通道局部放电（PD）信号的器件具有由多个PD传感器接收的预处理和放大信号的输入源。 然后为信号提供隔离和处理，以确保每个信号能够自我触发和单向传输。 最后，输出每个通道的处理信号。 对于超高频（UHF）PD信号，延迟传输通过表面声波（SAW）延迟线法实现。 本发明通过隔离处理使放大的多通道PD信号自触发和单向传输，然后实现并行连接而不受干扰。 该方法也降低信号传输损耗。 同时，所有检测到的PD信号通过并行连接方式在一条信号总线上传输，从而仅使用一组采集单元监测和获取多个传感器接收的信号，这显然降低了系统成本。