公开(公告)号：US10041985B2

公开(公告)日：2018-08-07

申请号：US15097067

申请日：2016-04-12

Applicant: ABB Technology AG

Inventor： Frej Suomi

IPC: G01R23/165 ,  G01R23/02 ,  H02H3/34 ,  H02H3/353 ,  G01R19/25 ,  H02J3/38 ,  H02J13/00

CPC classification number: G01R23/165 ,  G01R19/2513 ,  G01R23/02 ,  H02H3/343 ,  H02H3/353 ,  H02J13/0006 ,  H02J2003/388

Abstract: A method and an apparatus for detecting a vector shift in an AC power system, the apparatus comprising frequency measuring means adapted to determine a frequency of the AC power system, derivation means adapted to determine a time derivative of the frequency, filtering means adapted to filter the time derivative of the frequency, and detection means adapted to calculate time derivatives for the filtered time derivatives of the frequency over a time period having the length of the fundamental period of the AC power system, to determine a number of positive and negative time derivatives among the calculated time derivatives, and to detect a vector shift in the AC power system in response to an absolute value of a difference between the determined number of positive time derivatives and negative time derivatives exceeding a predetermined threshold value.

公开(公告)号：US20160334446A1

公开(公告)日：2016-11-17

申请号：US15097067

申请日：2016-04-12

Applicant: ABB Technology AG

Inventor： Frej Suomi

IPC: G01R23/165 ,  G01R23/02

CPC classification number: G01R23/165 ,  G01R19/2513 ,  G01R23/02 ,  H02H3/343 ,  H02H3/353 ,  H02J13/0006 ,  H02J2003/388

Abstract: A method and an apparatus for detecting a vector shift in an AC power system, the apparatus comprising frequency measuring means (10) adapted to determine a frequency of the AC power system, derivation means (20) adapted to determine a time derivative of the frequency, filtering means (30) adapted to filter the time derivative of the frequency, and detection means (40, 50, 60, 70) adapted to calculate time derivatives for the filtered time derivatives of the frequency over a time period having the length of the fundamental period of the AC power system, to determine a number of positive and negative time derivatives among the calculated time derivatives, and to detect a vector shift in the AC power system in response to an absolute value of a difference between the determined number of positive time derivatives and negative time derivatives exceeding a predetermined threshold value.

Abstract translation: 一种用于检测AC电力系统中的矢量移位的方法和装置，所述装置包括适于确定AC电力系统的频率的频率测量装置（10），适于确定频率的时间导数的导出装置（20） ，适于对频率的时间导数进行滤波的滤波装置（30）以及适于计算具有长度为的时间段内的频率的滤波时间导数的时间导数的检测装置（40,50,60,70） 确定交流电力系统的基本周期，以确定所计算的时间导数之间的正数和负时间导数的数量，并且响应于确定的正数之间的差的绝对值来检测交流电力系统中的向量偏移 时间导数和负时间导数超过预定阈值。