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。

公开(公告)号：US09933487B2

公开(公告)日：2018-04-03

申请号：US14230260

申请日：2014-03-31

Applicant: Eaton Corporation

Inventor： Santosh Kumar Sharma ,  Rahul Choudhary ,  Steven Andrew Dimino

IPC: G01R31/06 ,  G01R31/34 ,  G01R19/00 ,  H02P29/024

CPC classification number: G01R31/346 ,  G01R19/0046 ,  H02P29/0243 ,  H02P2207/01

Abstract: A system and method for detecting, localizing and quantifying stator winding faults in AC electrical machines is disclosed. A diagnostic system configured to detect a stator winding fault in an AC electrical machine includes a processor programmed to receive measurements of three-phase voltages and currents provided to the AC electrical machine from voltage and current sensors associated with the electrical distribution circuit, compute positive, negative and zero sequence components of voltage and current from the three-phase voltages and currents, and calculate a fault severity index (FSI) based on at least a portion of the positive, negative and zero sequence components of voltage and current, wherein calculating the FSI further comprises identifying a voltage gain in one or more phases of the AC electrical machine due to a stator winding fault and localizing the stator winding fault to one or more phases in the AC electrical machine.

公开(公告)号：US20150276827A1

公开(公告)日：2015-10-01

申请号：US14230238

申请日：2014-03-31

Applicant: Eaton Corporation

Inventor： Santosh Kumar Sharma ,  Rahul Choudhary ,  Xin Zhou ,  Steven Andrew Dimino

IPC: G01R21/00 ,  G01R25/00

CPC classification number: G01R31/086 ,  G01R31/088 ,  H02H3/253 ,  H02H3/382 ,  H02J3/26 ,  Y02E40/50 ,  Y04S10/522

Abstract: A system and method for detecting and localizing excess voltage drop in single or multiple phases of three-phase AC circuits is disclosed. An electrical distribution circuit is provided that includes an input connectable to an AC source, an output connectable to terminals of an electrical machine, the output configured to provide three-phase voltages and currents to the electrical machine, and a diagnostic system configured to detect an excess voltage drop (EVD) in the electrical distribution circuit. The diagnostic system includes a processor that is programmed to receive measurements of the three-phase voltages and currents provided to the electrical machine, compute a negative sequence voltage from the three-phase voltages and currents, determine a localization reference phase angle for each phase based in part on the three-phase voltages and currents, and calculate an EVD in the electrical distribution circuit based on the negative sequence voltage and the localization reference phase angles.

Abstract translation: 公开了用于检测和定位三相AC电路的单相或多相过剩电压降的系统和方法。 提供了一种配电电路，其包括可连接到AC电源的输入端，可连接到电机端子的输出端，所述输出被配置为向所述电机提供三相电压和电流;以及诊断系统，被配置为检测 配电电路中的过电压降（EVD）。 诊断系统包括处理器，其被编程为接收提供给电机的三相电压和电流的测量值，从三相电压和电流计算负序电压，确定每相基于的定位参考相位角 部分地基于三相电压和电流，并且基于负序电压和定位参考相位角计算配电电路中的EVD。

公开(公告)号：US09791496B2

公开(公告)日：2017-10-17

申请号：US14230238

申请日：2014-03-31

Applicant: Eaton Corporation

Inventor： Santosh Kumar Sharma ,  Rahul Choudhary ,  Xin Zhou ,  Steven Andrew Dimino

IPC: G01R31/08 ,  H02H3/253 ,  H02J3/26 ,  H02H3/38

CPC classification number: G01R31/086 ,  G01R31/088 ,  H02H3/253 ,  H02H3/382 ,  H02J3/26 ,  Y02E40/50 ,  Y04S10/522

Abstract: A system and method for detecting and localizing excess voltage drop in single or multiple phases of three-phase AC circuits is disclosed. An electrical distribution circuit is provided that includes an input connectable to an AC source, an output connectable to terminals of an electrical machine, the output configured to provide three-phase voltages and currents to the electrical machine, and a diagnostic system configured to detect an excess voltage drop (EVD) in the electrical distribution circuit. The diagnostic system includes a processor that is programmed to receive measurements of the three-phase voltages and currents provided to the electrical machine, compute a negative sequence voltage from the three-phase voltages and currents, determine a localization reference phase angle for each phase based in part on the three-phase voltages and currents, and calculate an EVD in the electrical distribution circuit based on the negative sequence voltage and the localization reference phase angles.

公开(公告)号：US20150276880A1

公开(公告)日：2015-10-01

申请号：US14230260

申请日：2014-03-31

Applicant: Eaton Corporation

Inventor： Santosh Kumar Sharma ,  Rahul Choudhary ,  Steven Andrew Dimino

IPC: G01R31/34 ,  G01R19/00

CPC classification number: G01R31/346 ,  G01R19/0046 ,  H02P29/0243 ,  H02P2207/01

Abstract: A system and method for detecting, localizing and quantifying stator winding faults in AC electrical machines is disclosed. A diagnostic system configured to detect a stator winding fault in an AC electrical machine includes a processor programmed to receive measurements of three-phase voltages and currents provided to the AC electrical machine from voltage and current sensors associated with the electrical distribution circuit, compute positive, negative and zero sequence components of voltage and current from the three-phase voltages and currents, and calculate a fault severity index (FSI) based on at least a portion of the positive, negative and zero sequence components of voltage and current, wherein calculating the FSI further comprises identifying a voltage gain in one or more phases of the AC electrical machine due to a stator winding fault and localizing the stator winding fault to one or more phases in the AC electrical machine.

Abstract translation: 公开了一种用于检测，定位和定量交流电机定子绕组故障的系统和方法。 配置为检测AC电机中的定子绕组故障的诊断系统包括被编程为接收从与配电电路相关联的电压和电流传感器提供给AC电机的三相电压和电流的测量的处理器， 基于三相电压和电流的电压和电流的负序和零序分量，并且基于电压和电流的正，负和零序分量的至少一部分来计算故障严重度指数（FSI），其中计算 FSI进一步包括由于定子绕组故障在AC电机的一个或多个相中识别电压增益，并将定子绕组故障定位到AC电机中的一个或多个相位。

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。