公开(公告)号：US10120012B2

公开(公告)日：2018-11-06

申请号：US15569900

申请日：2015-05-05

Applicant: ABB Schweiz AG

Inventor： Arkadiusz Burek ,  Jianping Wang ,  Jiuping Pan ,  Reynaldo Nuqui ,  YouYi Li

IPC: G01R31/08 ,  G01R31/11 ,  H02H3/06 ,  H02H7/26 ,  H02H3/087 ,  H02H3/20

Abstract: 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：US20180143238A1

公开(公告)日：2018-05-24

申请号：US15570493

申请日：2015-05-28

Applicant: ABB Schweiz AG

Inventor： YouYi Li ,  Jianping Wang ,  Kai Liu

IPC: G01R31/08 ,  G01R31/327

CPC classification number: G01R31/085 ,  G01R31/088 ,  G01R31/3274 ,  G01R31/3275 ,  H02H7/263 ,  H02H7/265

Abstract: A mechanism for travelling wave pilot protection of a transmission line and method for receiving indications of a travelling wave from two terminals of a transmission line, wherein two terminals are time synchronized. The method includes making a trip decision based on the indications using a short trip window. An arrangement is configured to perform the disclosed method.

公开(公告)号：US20180364293A1

公开(公告)日：2018-12-20

申请号：US16060680

申请日：2016-01-20

Applicant: ABB Schweiz AG

Inventor： YouYi Li ,  Kai Liu ,  Jianping Wang

IPC: G01R31/08 ,  H02H7/26

CPC classification number: G01R31/085 ,  G01R31/08 ,  H02H7/22 ,  H02H7/265

Abstract: There is provided mechanisms for detecting a fault of a transmission line (20) in a power system (10) comprising at least one of an extreme weak system (10a) and an extreme strong system (10b). A method comprises obtaining travelling wave polarities from two terminals (21a, 21b) of the transmission line during occurrence of the fault, the travelling wave polarities being defined by two current polarities and two voltage polarities. The method comprises determining the obtained travelling wave polarities to be detectable and the obtained travelling wave polarities to be non-detectable. The method comprises detecting the fault to be internal based on the detectable travelling wave polarities and the non-detectable travelling wave polarities. There is also provided an arrangement configured to perform such a method.

公开(公告)号：US10074969B2

公开(公告)日：2018-09-11

申请号：US15558894

申请日：2015-03-30

Applicant: ABB Schweiz AG

Inventor： Kai Liu ,  Jianping Wang ,  YouYi Li

IPC: H02H3/00 ,  H02H3/28 ,  H02H7/26 ,  G01R31/08

CPC classification number: H02H3/28 ,  G01R31/08 ,  G01R31/085 ,  H02H7/262 ,  H02H7/263 ,  H02H7/265

Abstract: 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.

公开(公告)号：US10295586B2

公开(公告)日：2019-05-21

申请号：US16060680

申请日：2016-01-20

Applicant: ABB Schweiz AG

Inventor： YouYi Li ,  Kai Liu ,  Jianping Wang

IPC: G01R1/00 ,  H02H7/22 ,  H02J1/00 ,  G01R31/08 ,  H02H7/26 ,  H02M1/00

Abstract: There is provided mechanisms for detecting a fault of a transmission line (20) in a power system (10) comprising at least one of an extreme weak system (10a) and an extreme strong system (10b). A method comprises obtaining travelling wave polarities from two terminals (21a, 21b) of the transmission line during occurrence of the fault, the travelling wave polarities being defined by two current polarities and two voltage polarities. The method comprises determining the obtained travelling wave polarities to be detectable and the obtained travelling wave polarities to be non-detectable. The method comprises detecting the fault to be internal based on the detectable travelling wave polarities and the non-detectable travelling wave polarities. There is also provided an arrangement configured to perform such a method.