公开(公告)号：US20110085272A1

公开(公告)日：2011-04-14

申请号：US12903104

申请日：2010-10-12

申请人： Edmund O. Schweitzer, III ,  Veselin Skendzic ,  Gabriel Benmouyal ,  Bruce A. Hall ,  Rogerio Scharlach

发明人： Edmund O. Schweitzer, III ,  Veselin Skendzic ,  Gabriel Benmouyal ,  Bruce A. Hall ,  Rogerio Scharlach

IPC分类号： H02H3/16

CPC分类号： H02H3/17 ,  H02H7/06

摘要： A generator winding-to-ground fault detection system is disclosed that includes a signal injection source in electrical communication with a winding of an electric power generator via an injection transformer. The winding may be coupled to ground via a winding-to-ground path and the signal generation source may generate an injection signal capable of being injected to the winding using the injection transformer. The disclosed system may further include a protection module in communication with the signal injection source and the electric power generator configured to receive the injection signal and a signal relating to the current through the winding-to-ground path, and to determine the occurrence of a winding-to-ground fault condition based at least in part on the injection signal and the signal relating to the current through the winding-to-ground path.

摘要翻译： 公开了一种发电机绕组到地面故障检测系统，其包括经由注入变压器与发电机的绕组电连通的信号注入源。 绕组可以经由绕线对地路径耦合到地，并且信号发生源可以产生能够使用注入变压器注入到绕组的注入信号。 所公开的系统还可以包括与信号注入源通信的保护模块和被配置为接收注入信号的电力发生器和与通过绕组对地路径的电流相关的信号，并且确定 至少部分地基于注入信号和与通过绕线对地路径的电流相关的信号的绕组到地的故障条件。

公开(公告)号：US08405940B2

公开(公告)日：2013-03-26

申请号：US12903104

申请日：2010-10-12

申请人： Edmund O. Schweitzer, III ,  Veselin Skendzic ,  Gabriel Benmouyal ,  Bruce A. Hall ,  Rogerio Scharlach

发明人： Edmund O. Schweitzer, III ,  Veselin Skendzic ,  Gabriel Benmouyal ,  Bruce A. Hall ,  Rogerio Scharlach

IPC分类号： H02H3/00

CPC分类号： H02H3/17 ,  H02H7/06

摘要： A generator winding-to-ground fault detection system is disclosed that includes a signal injection source in electrical communication with a winding of an electric power generator via an injection transformer. The winding may be coupled to ground via a winding-to-ground path and the signal generation source may generate an injection signal capable of being injected to the winding using the injection transformer. The disclosed system may further include a protection module in communication with the signal injection source and the electric power generator configured to receive the injection signal and a signal relating to the current through the winding-to-ground path, and to determine the occurrence of a winding-to-ground fault condition based at least in part on the injection signal and the signal relating to the current through the winding-to-ground path.

摘要翻译： 公开了一种发电机绕组到地面故障检测系统，其包括经由注入变压器与发电机的绕组电连通的信号注入源。 绕组可以经由绕线对地路径耦合到地，并且信号发生源可以产生能够使用注入变压器注入到绕组的注入信号。 所公开的系统还可以包括与信号注入源通信的保护模块和被配置为接收注入信号的电力发生器和与通过绕组对地路径的电流相关的信号，并且确定 至少部分地基于注入信号和与通过绕线对地路径的电流相关的信号的绕组到地的故障条件。

公开(公告)号：US06744391B2

公开(公告)日：2004-06-01

申请号：US10147641

申请日：2002-05-16

申请人： Travis L. Mooney ,  Tony J. Lee ,  Bruce A. Hall

发明人： Travis L. Mooney ,  Tony J. Lee ,  Bruce A. Hall

IPC分类号： H03M100

CPC分类号： H02H1/0007 ,  G01R19/2509 ,  H02H3/38

摘要： The system includes a unipolar A/D converter, which samples analog signal inputs thereto, the A/D converter being used in a protective relay for electric power systems. The unipolar A/D converter is responsive to input voltage values and current values from the power line to produce corresponding digital signals. The A/D converter has a ground pin voltage reference at least as negative as the most negative point of the input signal to be processed.

摘要翻译： 该系统包括单模A / D转换器，其对模拟信号输入进行采样，该A / D转换器用于电力系统的保护继电器。 单极A / D转换器响应来自电源线的输入电压值和电流值，产生相应的数字信号。 A / D转换器的接地引脚电压基准至少与要处理的输入信号的最大负点一样负。