公开(公告)号：US09478966B2

公开(公告)日：2016-10-25

申请号：US14136926

申请日：2013-12-20

Applicant: ABB Technology AG

Inventor： Kari Vanhala ,  Petri Koivula

IPC: H02H7/09 ,  G01R31/42 ,  H02H1/00 ,  H02J3/40 ,  H02J3/38

CPC classification number: H02H1/0007 ,  H02J3/40 ,  H02J2003/388

Abstract: A protection relay is provided for protection of an electric network. The protection relay measures an electric signal in the network, converts the measured signal to a frequency domain representation of the measured signal, and generates a measuring phasor based on the frequency domain representation, where the phase rotation of the measuring phasor is dependent on one or more frequency components present in the measured electric signal. The protection relay compares the measuring phasor to the reference phasor, where the phase rotation of the reference phasor is based on either a nominal or a measured frequency of the electric network, and launches protection if the comparison of the of the measuring phasor and the reference phasor fulfils a predetermined criterion.

Abstract translation: 提供保护继电器以保护电网。 保护继电器测量网络中的电信号，将测量的信号转换成测量信号的频域表示，并且基于频域表示产生测量相量，其中测量相量的相位旋转取决于一个或 在测量的电信号中存在更多的频率分量。 保护继电器将测量相量与参考相量进行比较，其中参考相量的相位旋转基于电网的标称或测量频率，并且如果测量相量与参考值的比较，则启动保护 相量达到预定的标准。

公开(公告)号：US20140104735A1

公开(公告)日：2014-04-17

申请号：US14136926

申请日：2013-12-20

Applicant: ABB Technology AG

Inventor： Kari VANHALA ,  Petri Koivula

IPC: H02H1/00

CPC classification number: H02H1/0007 ,  H02J3/40 ,  H02J2003/388

Abstract: A protection relay is provided for protection of an electric network. The protection relay measures an electric signal in the network, converts the measured signal to a frequency domain representation of the measured signal, and generates a measuring phasor based on the frequency domain representation, where the phase rotation of the measuring phasor is dependent on one or more frequency components present in the measured electric signal. The protection relay compares the measuring phasor to the reference phasor, where the phase rotation of the reference phasor is based on either a nominal or a measured frequency of the electric network, and launches protection if the comparison of the of the measuring phasor and the reference phasor fulfils a predetermined criterion.

Abstract translation: 提供保护继电器以保护电网。 保护继电器测量网络中的电信号，将测量的信号转换成测量信号的频域表示，并且基于频域表示产生测量相量，其中测量相量的相位旋转取决于一个或 在测量的电信号中存在更多的频率分量。 保护继电器将测量相量与参考相量进行比较，其中参考相量的相位旋转基于电网的标称或测量频率，并且如果测量相量与参考值的比较，则启动保护 相量达到预定的标准。