公开(公告)号：US08022709B2

公开(公告)日：2011-09-20

申请号：US12441678

申请日：2006-09-19

申请人： Ari Wahlroos ,  Janne Altonen

发明人： Ari Wahlroos ,  Janne Altonen

IPC分类号： G01R31/08

CPC分类号： H02H3/402

摘要： A method and a system for determining a circular characteristic for distance protection of a three-phase electric line, the system comprising means for detecting a fault on the electric line, means for identifying a faulted phase or phases of the electric line, means for determining, at a measuring point, a first fault loop impedance by using voltage(s) of the faulted phase(s), a second fault loop impedance by using a polarization voltage and a third fault loop impedance by using predetermined line parameters, and means for determining a radius and midpoint of the circular characteristic.

摘要翻译： 一种用于确定三相电线的距离保护的圆形特性的方法和系统，所述系统包括用于检测电线上的故障的装置，用于识别电线的故障相或相的装置，用于确定 在测量点，通过使用故障相位的电压，第一故障回路阻抗，通过使用预定线路参数使用极化电压和第三故障回路阻抗的第二故障回路阻抗，以及用于 确定圆形特征的半径和中点。

公开(公告)号：US20090267611A1

公开(公告)日：2009-10-29

申请号：US12421171

申请日：2009-04-09

申请人： Ari Wahlroos ,  Janne Altonen

发明人： Ari Wahlroos ,  Janne Altonen

IPC分类号： G01R31/08

CPC分类号： G01R31/088 ,  G01R31/085

摘要： A method and apparatus for determining a distance of a phase-to-phase fault or a three-phase fault on a three-phase electric line, the apparatus (40) being configured to determine a first estimate value for a distance between the measuring point (40) and a point (F) of fault on the basis of a first equation based on a fault loop model in which the point of fault is located between the measuring point and load of the electric line, and a second estimate value for the distance on the basis of a second equation based on a fault loop model in which the load of the electric line is located between the measuring point and the point of fault, and to select according to predetermined criteria one of the determined two estimate values as the distance between the measuring point (40) and the point of fault (F).

摘要翻译： 一种用于确定三相电线上的相间故障或三相故障的距离的方法和装置，所述装置（40）被配置为确定所述测量点之间的距离的第一估计值 基于故障点位于测量点和电线的负载之间的故障回路模型，基于第一方程（40）和故障点（F），以及第二估计值 基于其中电线的负载位于测量点和故障点之间的故障循环模型的第二等式的距离，并且根据预定标准来选择所确定的两个估计值之一作为 测量点（40）和故障点（F）之间的距离。

公开(公告)号：US20080174316A1

公开(公告)日：2008-07-24

申请号：US12003621

申请日：2007-12-28

申请人： Ari Wahlroos ,  Janne Altonen

发明人： Ari Wahlroos ,  Janne Altonen

IPC分类号： G01R31/08

CPC分类号： G01R31/088 ,  G01R31/086

摘要： A method, system and apparatus for determining a distance of a phase-to-earth fault on a three-phase electric line (30), the apparatus (40) being configured to determine a first estimate value for a distance between the measuring point (40) and a point of fault (F) on the basis of a first equation based on a fault loop model of the electric line, in which model the load of the electric line is located between the measuring point and the point of fault; determine a second estimate value for the distance on the basis of a second equation based on a fault loop model of the electric line, in which model the point of fault is located between the measuring point and load of the electric line; and select, according to predetermined criteria, one of the determined two estimate values as the distance between the measuring point and the point of fault.

摘要翻译： 一种用于确定三相电线（30）上的相对地故障的距离的方法，系统和装置，所述装置（40）被配置为确定测量点之间的距离的第一估计值 基于电线的故障回路模型的第一方程式（40）和故障点（F），其中电线的负载位于测量点和故障点之间; 基于电线的故障回路模型，基于第二方程确定距离的第二估计值，其中，故障点位于测量点和电线负载之间; 并且根据预定标准，将所确定的两个估计值中的一个作为测量点与故障点之间的距离进行选择。

公开(公告)号：US08981785B2

公开(公告)日：2015-03-17

申请号：US13371112

申请日：2012-02-10

申请人： Ari Wahlroos ,  Janne Altonen

发明人： Ari Wahlroos ,  Janne Altonen

IPC分类号： G01R31/14 ,  G01R31/00 ,  G01R31/08 ,  H02H3/40 ,  H02H1/00

CPC分类号： H02H3/402 ,  H02H1/0092

摘要： A method and an apparatus for detecting an earth fault on a three-phase electric line are provided. The apparatus includes means for determining a neutral admittance on the basis of a residual current and a residual voltage, means for comparing the determined neutral admittance to a predetermined operation characteristic to detect an earth fault on the three-phase electric line, and means for determining one or more harmonic components of the residual current and one or more harmonic components of the residual voltage. The harmonic components have frequencies n*fn such that n≧2 and fn is a fundamental frequency. The means for determining a neutral admittance are configured to use at least one of the determined one or more harmonic components of the residual current and at least one of the determined one or more harmonic components of the residual voltage for determining the neutral admittance.

摘要翻译： 提供了一种用于检测三相电线上的接地故障的方法和装置。 该装置包括用于基于剩余电流和剩余电压确定中性导纳的装置，用于将所确定的中性导纳与预定操作特性进行比较以检测三相电线路上的接地故障的装置，以及用于确定 剩余电流的一个或多个谐波分量和剩余电压的一个或多个谐波分量。 谐波分量具有频率n * fn，使得n≥2，fn是基频。 用于确定中性导纳的装置被配置为使用所确定的剩余电流的一个或多个谐波分量中的至少一个和所确定的残余电压的一个或多个谐波分量中的至少一个来确定中性导纳。

公开(公告)号：US20070014059A1

公开(公告)日：2007-01-18

申请号：US11476547

申请日：2006-06-29

申请人： Janne Altonen ,  Ari Wahlroos

发明人： Janne Altonen ,  Ari Wahlroos

IPC分类号： H02H3/00

CPC分类号： G01R31/086 ,  G01R31/088

摘要： A method and system for determining a location of a phase-to-earth fault in a line of an electric network, the electric line comprising two or more sections (30a, 30b, 30c), the system being configured to determine, at a measuring point, a reactance of a fault loop; determine a faulted section of the electric line to be a section closest to the measurement point of all such sections for which a sum of a positive sequence reactance and an earth return path reactance of the section in question and positive sequence reactances and an earth return path reactances of sections, if any, between the measurement point and the section in question is greater than or equal to the determined reactance of the fault loop; and calculate a distance between the measuring point and a point of fault on the basis of the reactance values.

公开(公告)号：US20110298468A1

公开(公告)日：2011-12-08

申请号：US13113708

申请日：2011-05-23

申请人： Ari WAHLROOS ,  Janne Altonen

发明人： Ari WAHLROOS ,  Janne Altonen

IPC分类号： G01R31/14

CPC分类号： H02H3/165 ,  G01R31/025 ,  G01R31/086 ,  H02H5/105

摘要： A method and an apparatus for detecting a phase-to-earth fault on a three-phase electric line of an electric network, the apparatus determining a neutral admittance based on a ratio of a difference between zero sequence currents on the three-phase electric line and a difference between zero sequence voltages in the electric network before an earth fault and during the earth fault. The apparatus also compares the determined neutral admittance, to a predetermined operation characteristic to detect a phase-to-earth fault on the three-phase electric line. The predetermined operation characteristic, when presented on an admittance plane, defines a closed area such that the center of the closed area is offset from the origin of the admittance plane towards a negative susceptance direction and/or towards a negative conductance direction.

摘要翻译： 一种用于检测电网三相电线上的相对地故障的方法和装置，该装置基于三相电力线路上的零序电流之差的比值来确定中性导纳 以及接地故障之前和接地故障期间电网中的零序电压之间的差异。 该装置还将确定的中性导纳与预定的操作特性进行比较，以检测三相电线上的相对地故障。 当在导纳平面上呈现时，预定的操作特性限定了闭合区域，使得闭合区域的中心偏离导纳平面的原点朝向负的电纳方向和/或朝向负的电导方向。

公开(公告)号：US20090309612A1

公开(公告)日：2009-12-17

申请号：US12441678

申请日：2006-09-19

申请人： Ari Wahlroos ,  Janne Altonen

发明人： Ari Wahlroos ,  Janne Altonen

IPC分类号： G01R27/28 ,  G01R25/00 ,  G01R21/06

CPC分类号： H02H3/402

摘要： A method and a system for determining a circular characteristic for distance protection of a three-phase electric line, the system comprising means for detecting a fault on the electric line, means for identifying a faulted phase or phases of the electric line, means for determining, at a measuring point, a first fault loop impedance by using voltage(s) of the faulted phase(s), a second fault loop impedance by using a polarization voltage and a third fault loop impedance by using predetermined line parameters, and means for determining a radius and midpoint of the circular characteristic.

摘要翻译： 一种用于确定三相电线的距离保护的圆形特性的方法和系统，所述系统包括用于检测电线上的故障的装置，用于识别电线的故障相或相的装置，用于确定 在测量点，通过使用故障相位的电压，第一故障回路阻抗，通过使用预定线路参数使用极化电压和第三故障回路阻抗的第二故障回路阻抗，以及用于 确定圆形特征的半径和中点。

公开(公告)号：US07514933B2

公开(公告)日：2009-04-07

申请号：US11429956

申请日：2006-05-09

申请人： Janne Altonen ,  Ari Wahlroos

发明人： Janne Altonen ,  Ari Wahlroos

IPC分类号： G01R31/08

CPC分类号： G01R31/088 ,  G01R31/086

摘要： A method and system for determining a location of a phase-to-earth fault in a three-phase electric line of an electric network, the system being configured to monitor current and voltage quantities of the three-phase electric line at a measuring point and calculate a distance (d) between the measuring point and a point of fault (F) using an equation relating the current and voltage quantities to the distance, wherein the system is further configured to calculate load-compensated zero and negative sequence currents, calculate a load-compensated phase voltage of the faulted phase by using the compensated zero sequence current; and use the compensated negative sequence current and the compensated phase voltage for calculating the distance (d) between the measuring point and a point of fault (F).

摘要翻译： 一种用于确定电网三相电线中的相对地故障位置的方法和系统，该系统被配置为监测测量点处三相电线的电流和电压量， 使用将电流和电压量与距离相关联的方程计算测量点和故障点之间的距离（d），其中系统还被配置为计算负载补偿的零和负序电流，计算一个 通过使用补偿的零序电流对故障相的负载补偿相电压; 并使用补偿的负序电流和补偿相电压来计算测量点和故障点之间的距离（D）（F）。

公开(公告)号：US20130043879A1

公开(公告)日：2013-02-21

申请号：US13371112

申请日：2012-02-10

申请人： Ari WAHLROOS ,  Janne ALTONEN

发明人： Ari WAHLROOS ,  Janne ALTONEN

IPC分类号： G01R31/14

CPC分类号： H02H3/402 ,  H02H1/0092

摘要： A method and an apparatus for detecting an earth fault on a three-phase electric line are provided. The apparatus includes means for determining a neutral admittance on the basis of a residual current and a residual voltage, means for comparing the determined neutral admittance to a predetermined operation characteristic to detect an earth fault on the three-phase electric line, and means for determining one or more harmonic components of the residual current and one or more harmonic components of the residual voltage. The harmonic components have frequencies n*fn such that n≧2 and fn is a fundamental frequency. The means for determining a neutral admittance are configured to use at least one of the determined one or more harmonic components of the residual current and at least one of the determined one or more harmonic components of the residual voltage for determining the neutral admittance.

摘要翻译： 提供了一种用于检测三相电线上的接地故障的方法和装置。 该装置包括用于基于剩余电流和剩余电压确定中性导纳的装置，用于将所确定的中性导纳与预定操作特性进行比较以检测三相电线路上的接地故障的装置，以及用于确定 剩余电流的一个或多个谐波分量和剩余电压的一个或多个谐波分量。 谐波分量具有频率n * fn，使得n≥2，fn是基频。 用于确定中性导纳的装置被配置为使用所确定的剩余电流的一个或多个谐波分量中的至少一个和所确定的残余电压的一个或多个谐波分量中的至少一个来确定中性导纳。

公开(公告)号：US07728600B2

公开(公告)日：2010-06-01

申请号：US12003621

申请日：2007-12-28

申请人： Ari Wahlroos ,  Janne Altonen

发明人： Ari Wahlroos ,  Janne Altonen

IPC分类号： G01R31/00 ,  H02H5/04

CPC分类号： G01R31/088 ,  G01R31/086

摘要： A method, system and apparatus for determining a distance of a phase-to-earth fault on a three-phase electric line (30), the apparatus (40) being configured to determine a first estimate value for a distance between the measuring point (40) and a point of fault (F) on the basis of a first equation based on a fault loop model of the electric line, in which model the load of the electric line is located between the measuring point and the point of fault; determine a second estimate value for the distance on the basis of a second equation based on a fault loop model of the electric line, in which model the point of fault is located between the measuring point and load of the electric line; and select, according to predetermined criteria, one of the determined two estimate values as the distance between the measuring point and the point of fault.

摘要翻译： 一种用于确定三相电线（30）上的相对地故障的距离的方法，系统和装置，所述装置（40）被配置为确定测量点之间的距离的第一估计值 基于电线的故障回路模型的第一方程式（40）和故障点（F），其中电线的负载位于测量点和故障点之间; 基于电线的故障回路模型，基于第二方程确定距离的第二估计值，其中，故障点位于测量点和电线负载之间; 并且根据预定标准，将所确定的两个估计值中的一个作为测量点与故障点之间的距离进行选择。