公开(公告)号：US09425609B2

公开(公告)日：2016-08-23

申请号：US13648813

申请日：2012-10-10

Applicant: ABB Technology AG

Inventor： Ari Wahlroos ,  Janne Altonen

IPC: H02H3/28 ,  G01R31/08 ,  G01R31/327 ,  H02H3/38 ,  H02H7/045

CPC classification number: H02H3/286 ,  G01R31/086 ,  G01R31/3275 ,  H02H3/385 ,  H02H7/045

Abstract: A method and apparatus are provided for differential protection of a three phase electric connection of an electric system. The apparatus includes means for determining a value of an operate quantity, which operate quantity is based on a difference between current quantities at a first point and a second point of the electric connection, and means for detecting a fault in the electric connection between the first point and the second point if the value of the operate quantity exceeds a value of a predetermined threshold quantity. The operate quantity is based on a difference of residual currents at the first point and the second point, or a quantity indicative thereof, and a coefficient indicative of an angle between a residual voltage of the electric connection and the difference of residual currents at the first point and the second point.

Abstract translation: 提供了用于电气系统的三相电连接的差动保护的方法和装置。 该装置包括用于确定操作量的值的装置，其操作量基于电连接的第一点和第二点处的电流量之差，以及用于检测第一和第二点之间的电连接中的故障的装置 点和第二点，如果操作量的值超过预定阈值的值。 操作量基于第一点和第二点处的残余电流的差异，或者指示其的量，以及表示电连接的残余电压与第一点和第二点的剩余电流的差之间的角度的系数 点和第二点。

公开(公告)号：US08838402B2

公开(公告)日：2014-09-16

申请号：US13647548

申请日：2012-10-09

Applicant: ABB Technology AG

Inventor： Ari Wahlroos ,  Janne Altonen ,  Pentti Mähönen

IPC: G01R19/00 ,  G06F11/30

CPC classification number: G01R15/183 ,  G01R19/0084

Abstract: A method and an arrangement for voltage measurement with a transformer configuration comprising three single pole voltage transformers having tertiary windings open-delta connected with each other. The arrangement is configured to apply a correction to measured secondary voltages on the basis of one or more parameters of the voltage transformers and/or one or more quantities in a known relation to one or more parameters of the voltage transformers, one or more parameters of a circuit connected to the secondary windings and/or one or more quantities in a known relation to one or more parameters of the circuit connected to the secondary windings, and one or more parameters of a circuit connected to the tertiary windings and/or one or more quantities in a known relation to one or more parameters of the circuit connected to the tertiary windings.

Abstract translation: 一种用于具有变压器配置的电压测量的方法和装置，包括具有相互连接的三级绕组开放三角形的三个单极电压互感器。 该布置被配置为基于电压互感器的一个或多个参数和/或与电压互感器的一个或多个参数已知关系的一个或多个量来对所测量的次级电压进行校正，一个或多个参数 连接到次级绕组的电路和/或以已知关系连接到次级绕组的电路的一个或多个参数的一个或多个量以及连接到第三绕组的电路的一个或多个参数和/或一个或多个 与已连接到三级绕组的电路的一个或多个参数有已知关系的更多量。

公开(公告)号：US20130035882A1

公开(公告)日：2013-02-07

申请号：US13648813

申请日：2012-10-10

Applicant: ABB Technology AG

Inventor： Ari WAHLROOS ,  Janne Altonen

IPC: G01R31/08 ,  G06F19/00

CPC classification number: H02H3/286 ,  G01R31/086 ,  G01R31/3275 ,  H02H3/385 ,  H02H7/045

Abstract: A method and apparatus are provided for differential protection of a three phase electric connection of an electric system. The apparatus includes means for determining a value of an operate quantity, which operate quantity is based on a difference between current quantities at a first point and a second point of the electric connection, and means for detecting a fault in the electric connection between the first point and the second point if the value of the operate quantity exceeds a value of a predetermined threshold quantity. The operate quantity is based on a difference of residual currents at the first point and the second point, or a quantity indicative thereof, and a coefficient indicative of an angle between a residual voltage of the electric connection and the difference of residual currents at the first point and the second point.

Abstract translation: 提供了用于电气系统的三相电连接的差动保护的方法和装置。 该装置包括用于确定操作量的值的装置，其操作量基于电连接的第一点和第二点处的电流量之间的差异，以及用于检测第一和第二点之间的电连接中的故障的装置 点和第二点，如果操作量的值超过预定阈值的值。 操作量基于第一点和第二点处的残余电流的差异或其指示的量，以及指示电连接的残余电压与第一点和第二点的剩余电流的差之间的角度的系数 点和第二点。