专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US07812615B2 Method and device for fault detection in transformers or power lines 有权
标题翻译：变压器或电力线路故障检测方法和装置
公开(公告)号：US07812615B2
公开(公告)日：2010-10-12
申请号：US10585123
申请日：2004-12-22
申请人： Zoran Gajic , Ivo Brncic
发明人： Zoran Gajic , Ivo Brncic
IPC分类号： G01R31/06 , G01R31/08 , H02H7/04 , H02H3/26
CPC分类号： H02H7/045 , G01R31/027 , H02H3/286
摘要： A method for fault detection in a power transformer/autotransformer and/or interconnected power lines, which are within the zone protected by the differential protection, and particularly suitable for detecting turn-to-turn faults in power transformer/autotransformer windings. All individual instantaneous phase currents of the protected object are measured, individual phase currents as fundamental frequency phasors are calculated, the contributions of the individual protected object sides negative sequence currents to the total negative sequence differential current are calculated by compensating for the phase shift of an eventual power transformer within the protected zone, the relative positions of the compensated individual sides negative sequence currents in the complex plane are compared, in order to determine whether the source of the negative sequence currents, i.e. the fault position, is within the protected zone or outside of the protected zone, delimited with current transformer locations, the protected object is disconnected if determined that the source of the negative sequence currents is within the protected zone.
摘要翻译：一种用于电力变压器/自耦变压器和/或互连电力线路中的故障检测的方法，该电力变压器/互连电力线路在由差动保护器保护的区域内，并且特别适用于检测电力变压器/自耦变压器绕组中的匝间故障。测量受保护物体的所有单个瞬时相电流，计算作为基频相位的单相电流，通过补偿相对于相位偏移的相移来计算单个受保护对象侧负序电流对总负序差动电流的贡献比较保护区内最终的电源变压器，比较复平面中补偿的各个侧负序电流的相对位置，以便确定负序电流的源，即故障位置是否在保护区内，或在受保护区之外，用当前的变压器位置定界，如果确定负序电流的源在保护区内，受保护物体将断开。

2. 发明申请

US20160006240A1 A METHOD FOR DETECTING FAULT AND CURRENT DIFFERENTIAL PROTECTION SYSTEM THEREOF 有权
标题翻译：一种用于检测故障和电流差动保护系统的方法
公开(公告)号：US20160006240A1
公开(公告)日：2016-01-07
申请号：US14770240
申请日：2013-04-07
申请人： YOUYI LI , KAI LIU , IVO BRNCIC , ZHANPENG SHI , ABB TECHNOLOGY LTD.
发明人： YOUYI LI , KAI LIU , IVO BRNCIC , ZHANPENG SHI
IPC分类号： H02H9/02
CPC分类号： H02H9/02 , H02H3/006 , H02H3/28 , H02H3/283 , H02H7/045
摘要： The present invention discloses a method for detecting a fault and a current differential protection system thereof. The method for detecting fault includes calculating fault component currents, calculating an operate current and a restraint current of all terminals, and adjusting an operate level by adapting an operate-restraint characteristic according to a fault component. The method has very small operating area for external faults, which makes the method very reliable even for the case with serious CT saturation. A very big operating area for internal faults makes the method very sensitive for internal faults even for a heavy load and high resistance fault.
摘要翻译：本发明公开了一种故障检测方法及其电流差动保护系统。检测故障的方法包括计算故障分量电流，计算所有终端的工作电流和约束电流，以及通过根据故障分量调整操作限制特性来调整操作电平。该方法对外部故障的操作面积非常小，即使对于CT饱和严重的情况，该方法也非常可靠。内部故障的非常大的操作区域使得该方法对于内部故障甚至对于重负载和高电阻故障也非常敏感。

3. 发明申请

US20080130179A1 Method And Device For Fault Detection In Transformers Or Power Lines 有权
标题翻译：变压器或电力线路故障检测方法与装置
公开(公告)号：US20080130179A1
公开(公告)日：2008-06-05
申请号：US10585123
申请日：2004-12-22
申请人： Zoran Gajic , Ivo Brncic
发明人： Zoran Gajic , Ivo Brncic
IPC分类号： H02H7/045 , G01R31/08
CPC分类号： H02H7/045 , G01R31/027 , H02H3/286
摘要： A method for fault detection in a power transformer/autotransformer and/or interconnected power lines, which are within the zone protected by the differential protection, and particularly suitable for detecting turn-to-turn faults in power transformer/autotransformer windings. All individual instantaneous phase currents of the protected object are measured, individual phase currents as fundamental frequency phasors are calculated, the contributions of the individual protected object sides negative sequence currents to the total negative sequence differential current are calculated by compensating for the phase shift of an eventual power transformer within the protected zone, the relative positions of the compensated individual sides negative sequence currents in the complex plane are compared, in order to determine whether the source of the negative sequence currents, i.e. the fault position, is within the protected zone or outside of the protected zone, delimited with current transformer locations, the protected object is disconnected if determined that the source of the negative sequence currents is within the protected zone.
摘要翻译：一种用于电力变压器/自耦变压器和/或互连电力线路中的故障检测的方法，该电力变压器/互连电力线路在由差动保护器保护的区域内，并且特别适用于检测电力变压器/自耦变压器绕组中的匝间故障。测量受保护物体的所有单个瞬时相电流，计算作为基频相位的单相电流，通过补偿相对于相位偏移的相移来计算单个受保护对象侧负序电流对总负序差动电流的贡献比较保护区内最终的电源变压器，比较复平面中补偿的各个侧负序电流的相对位置，以便确定负序电流的源，即故障位置是否在保护区内，或在受保护区之外，用当前的变压器位置定界，如果确定负序电流的源在保护区内，受保护物体将断开。

4. 发明授权

US08970071B2 Method and system for disconnecting a generator from a power system 有权
标题翻译：将发电机与电力系统断开的方法和系统
公开(公告)号：US08970071B2
公开(公告)日：2015-03-03
申请号：US13788642
申请日：2013-03-07
申请人： Ivo Brncic , Soren Forsman
发明人： Ivo Brncic , Soren Forsman
IPC分类号： H01H47/00 , H02H3/02 , H02H3/48 , H02H7/06 , H02J3/38
CPC分类号： H02H3/021 , H02H3/48 , H02H7/06 , H02J3/38 , H02J2003/388 , Y10T307/826
摘要： A method for disconnecting a generator from a power system when the generator and the thereto connected power system are non-synchronized. The method includes the steps of: determining that there is a loss of synchronization between the generator and the power system, which loss of synchronization provides an amplitude variation of an electrical parameter associated with the generator. The method further includes determining when a minimum amplitude of the electrical parameter will occur, wherein when the occurrence of the minimum amplitude has been predicted, providing a command signal for disconnecting the generator from the power system, wherein the command signal is provided prior to the minimum amplitude of the electrical parameter is attained, and disconnecting the generator from the power system approximately when the determined minimum amplitude of the electrical parameter occurs. It is also presented a protection system for a generator in a power system.
摘要翻译：一种当发电机和其连接的电力系统不同步时，将发电机与电力系统断开的方法。该方法包括以下步骤：确定发电机和电力系统之间存在同步丢失，同步丢失提供与发电机相关联的电参数的幅度变化。该方法还包括确定何时将发生电参数的最小幅度，其中当已经预测出最小幅度的出现时，提供用于将发生器与电力系统断开的命令信号，其中，命令信号在达到电参数的最小幅度，并且在发生电参数的确定的最小幅度时，近似地将发电机与电力系统断开。它还提供了电力系统中发电机的保护系统。

5. 发明申请

US20130257178A1 Method And System For Disconnecting A Generator From A Power System 有权
标题翻译：从电力系统断开发电机的方法和系统
公开(公告)号：US20130257178A1
公开(公告)日：2013-10-03
申请号：US13788642
申请日：2013-03-07
申请人： Ivo Brncic , Soren Forsman
发明人： Ivo Brncic , Soren Forsman
IPC分类号： H02H3/02
CPC分类号： H02H3/021 , H02H3/48 , H02H7/06 , H02J3/38 , H02J2003/388 , Y10T307/826
摘要： A method for disconnecting a generator from a power system when the generator and the thereto connected power system are non-synchronized. The method includes the steps of: determining that there is a loss of synchronization between the generator and the power system, which loss of synchronization provides an amplitude variation of an electrical parameter associated with the generator. The method further includes determining when a minimum amplitude of the electrical parameter will occur, wherein when the occurrence of the minimum amplitude has been predicted, providing a command signal for disconnecting the generator from the power system, wherein the command signal is provided prior to the minimum amplitude of the electrical parameter is attained, and disconnecting the generator from the power system approximately when the determined minimum amplitude of the electrical parameter occurs. It is also presented a protection system for a generator in a power system.
摘要翻译：一种当发电机和其连接的电力系统不同步时，将发电机与电力系统断开的方法。该方法包括以下步骤：确定发电机和电力系统之间存在同步丢失，同步丢失提供与发电机相关联的电参数的幅度变化。该方法还包括确定何时将发生电参数的最小幅度，其中当已经预测出最小幅度的出现时，提供用于将发生器与电力系统断开的命令信号，其中，命令信号在达到电参数的最小幅度，并且在发生电参数的确定的最小幅度时，近似地断开发电机与电力系统的连接。它还提供了电力系统中发电机的保护系统。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式