公开(公告)号：US20140320148A1

公开(公告)日：2014-10-30

申请号：US13873326

申请日：2013-04-30

Applicant: EATON CORPORATION

Inventor： Santosh Kumar Sharma ,  Xin Zhou ,  Steven Andrew Dimino ,  Supriya Karnani ,  Snehal Kale ,  Rahul Choudhary ,  Debsubhra Chakraborty

IPC: G01R31/02

CPC classification number: G01R31/024 ,  G01R31/026 ,  G01R31/088 ,  G01R31/343 ,  H02H3/33 ,  H02H3/44 ,  H02H5/10 ,  H02H7/228

Abstract: A system and method for detecting excess voltage drop (EVD) in a three-phase electrical distribution circuit includes a diagnostic system comprising a processor that is programmed to receive three-phase voltages and currents provided to terminals of the electrical machine, determine fundamental components of the three-phase voltages and currents provided to the terminals, and compute positive, negative, and zero sequence currents from the fundamental components. The processor is also programmed to extract a compensated negative sequence current from the negative sequence current component, add the compensated negative sequence current to the positive sequence current to determine fault reference current phasors, determine a negative current reference phase angle for each phase based in part on a phase angle of the positive sequence current, and identify an EVD fault in the electrical distribution circuit based on the compensated negative sequence current, the fault reference current phasors, and the negative current reference phase angles.

Abstract translation: 用于检测三相配电电路中的过电压降（EVD）的系统和方法包括诊断系统，其包括被编程为接收提供给电机端子的三相电压和电流的处理器， 提供给端子的三相电压和电流，并从基本分量计算正，负和零序电流。 处理器还被编程为从负序电流分量提取补偿的负序电流，将补偿的负序电流加到正序电流以确定故障参考电流相量，部分地基于每个相确定负电流参考相位角 在正序电流的相位角上，基于补偿的负序电流，故障参考电流相量和负电流参考相位角来识别配电电路中的EVD故障。

公开(公告)号：US08963556B2

公开(公告)日：2015-02-24

申请号：US13873326

申请日：2013-04-30

Applicant: Eaton Corporation

Inventor： Santosh Kumar Sharma ,  Xin Zhou ,  Steven Andrew Dimino ,  Supriya Karnani ,  Snehal Kale ,  Rahul Choudhary ,  Debsubhra Chakraborty

IPC: G01R31/08 ,  G01R31/02 ,  H02H3/33

CPC classification number: G01R31/024 ,  G01R31/026 ,  G01R31/088 ,  G01R31/343 ,  H02H3/33 ,  H02H3/44 ,  H02H5/10 ,  H02H7/228

Abstract: A system and method for detecting excess voltage drop (EVD) in a three-phase electrical distribution circuit includes a diagnostic system comprising a processor that is programmed to receive three-phase voltages and currents provided to terminals of the electrical machine, determine fundamental components of the three-phase voltages and currents provided to the terminals, and compute positive, negative, and zero sequence currents from the fundamental components. The processor is also programmed to extract a compensated negative sequence current from the negative sequence current component, add the compensated negative sequence current to the positive sequence current to determine fault reference current phasors, determine a negative current reference phase angle for each phase based in part on a phase angle of the positive sequence current, and identify an EVD fault in the electrical distribution circuit based on the compensated negative sequence current, the fault reference current phasors, and the negative current reference phase angles.

Abstract translation: 用于检测三相配电电路中的过电压降（EVD）的系统和方法包括诊断系统，其包括被编程为接收提供给电机端子的三相电压和电流的处理器， 提供给端子的三相电压和电流，并从基本分量计算正，负和零序电流。 处理器还被编程为从负序电流分量提取补偿的负序电流，将补偿的负序电流加到正序电流以确定故障参考电流相量，部分地基于每个相确定负电流参考相位角 在正序电流的相位角上，基于补偿的负序电流，故障参考电流相量和负电流参考相位角来识别配电电路中的EVD故障。