公开(公告)号：US20170016960A1

公开(公告)日：2017-01-19

申请号：US15124948

申请日：2015-03-04

Applicant: ABB SCHWEIZ AG

Inventor： Pedro Rodriguez ,  Subrat Sahoo

IPC: G01R31/34

CPC classification number: G01R31/34 ,  G01R31/343 ,  H02P29/0241

Abstract: A method of determining a fault condition in a synchronous machine. The method includes a) obtaining a field current signal and a shaft voltage signal of the synchronous machine, b) transforming the field current signal and the shaft voltage signal to obtain a field current frequency spectrum and a shaft voltage frequency spectrum, and c) determining whether a fault condition is present, and in case a fault condition is present identifying a type of the fault condition, based on harmonic content of the field current frequency spectrum and harmonic content of the shaft voltage frequency spectrum, wherein c) includes comparing the harmonic content of the field current frequency spectrum with fault condition field current signature spectra and comparing the harmonic content of the shaft voltage frequency spectrum with fault condition shaft voltage signature spectra.

Abstract translation: 一种确定同步电机故障状态的方法。 该方法包括a）获得同步电机的励磁电流信号和轴电压信号，b）转换励磁电流信号和轴电压信号，获得励磁电流频谱和轴电压频谱，c）确定 根据场电压频谱的谐波含量和轴电压频谱的谐波含量，确定是否存在故障状况，以及在存在故障状况的情况下识别故障状况的类型，其中c）包括比较谐波 将现场频谱的内容与故障状态场电流特征谱进行比较，并将轴电压频谱的谐波含量与故障状态轴电压特征谱进行比较。