公开(公告)号：US20180106849A1

公开(公告)日：2018-04-19

申请号：US15569900

申请日：2015-05-05

申请人： ABB Schweiz AG

发明人： Arkadiusz BUREK ,  Jianping WANG ,  Jiuping PAN ,  Reynaldo NUQUI ,  YouYi LI

IPC分类号： G01R31/08 ,  H02H3/087 ,  H02H3/20 ,  H02H3/06 ,  H02H7/26

CPC分类号： G01R31/085 ,  G01R31/11 ,  H02H3/06 ,  H02H3/087 ,  H02H3/202 ,  H02H7/265 ,  H02H7/268

摘要： A method and an apparatus for fault detection in a mixed configuration power transmission line including a plurality of sections arranged between one end of the transmission line and the other end of the transmission line and including at least one overhead line section and at least one cable section are disclosed. Based on a comparison travelling wave voltage or current time derivatives at the one end and the other end of the power transmission line with selected threshold values, it is determined if there is a fault occurring in at least one cable section of the power transmission line. Embodiments utilize amplification of travelling wave voltages and/or currents which may occur at junctions between a cable section and an adjacent overhead line section in determining if the fault occurs in a cable section of the power transmission line.

公开(公告)号：US20190391191A1

公开(公告)日：2019-12-26

申请号：US16315665

申请日：2016-07-08

申请人： ABB Schweiz AG

发明人： Naidu OBBALAREDDI DEMUDU ,  Amit PUROHIT ,  Sachin SRIVASTAVA ,  Jianping WANG

IPC分类号： G01R27/16 ,  G01R31/08 ,  H02H7/26

摘要： A method and system is provided for locating a fault in a mixed power transmission line. The method is implemented by an Intelligent Electronic Device (IED) of the mixed line. The IED detects a travelling wave from one or more signals received from one or more measurement equipment. Thereafter, the IED identifies a line section with the fault, and generates two or more estimates for the location of the fault based on a time difference between arrival of two peaks of the travelling wave, a velocity of propagation of the travelling wave in the line section identified with the fault, and a length of one or more line sections. The IED determines the location of the fault based on a comparison of each estimate with a threshold, wherein the threshold is estimated based on the one or more signals, equivalent source impedance of each source and total line impedance.

公开(公告)号：US20180145505A1

公开(公告)日：2018-05-24

申请号：US15574390

申请日：2015-05-26

申请人： ABB SCHWEIZ AG

发明人： YouYi LI ,  Kai LIU ,  Jianping WANG

IPC分类号： H02H7/26 ,  H02H1/00 ,  H02H3/44 ,  G01R31/11 ,  G01R23/167

摘要： There is provided mechanisms for travelling wave protection of a transmission line. A method includes performing high-pass filtering of a current and/or voltage measurement of a transmission line so as to detect fault-caused high-frequency components of the current and/or voltage measurement. The method includes providing a result of the high-pass filtering as input to a trip decision maker performing travelling wave detection.

公开(公告)号：US20180034265A1

公开(公告)日：2018-02-01

申请号：US15549198

申请日：2016-03-03

申请人： ABB Schweiz AG

发明人： Obbalareddi Demudu NAIDU ,  Amit PUROHIT ,  Vinay KARIWALA ,  Jianping WANG

IPC分类号： H02H7/26 ,  H02H3/06 ,  G01R31/08 ,  H02H1/00

CPC分类号： H02H7/26 ,  G01R31/085 ,  H02H1/0007 ,  H02H3/06 ,  H02H7/265

摘要： A method is provided for protection in a mixed power transmission line by controlling a switching device connected thereto through an Intelligent Electronic Device (IED). The mixed line has two or more sections with at least one overhead section (10A) and at least one underground section (10B), wherein every two consecutive sections are connected at a junction (10C). The method is implemented by the IED (14), which receives a signal from a measurement equipment. The IED detects a travelling wave from the signal, and determines a first peak of the travelling wave and at least one a peak width, a rise time and a discharge time of the first peak. The IED identifies the section with the fault based on a comparison of at least one of the peak width, the rise time and the discharge time with a corresponding threshold value of each junction, and controls the switching device based on the comparison.

公开(公告)号：US20180069391A1

公开(公告)日：2018-03-08

申请号：US15558894

申请日：2015-03-30

申请人： ABB Schweiz AG

发明人： Kai LIU ,  Jianping WANG ,  YouYi LI

IPC分类号： H02H3/28 ,  H02H7/26

CPC分类号： H02H3/28 ,  G01R31/08 ,  G01R31/085 ,  H02H7/262 ,  H02H7/263 ,  H02H7/265

摘要： A mechanism for travelling wave protection of a transmission line and a method for acquiring information of both voltage and current polarities from two ends of a transmission line. The method includes comparing the voltage and current polarities of both ends of the transmission line to each other. The method also includes making a trip decision based on the comparison.