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1. 发明申请

WO2015118163A1 DIRECTION DETECTING OF A GROUND FAULT IN A MULTIPHASE NETWORK 审中-公开
标题翻译：在多个网络中的地面故障的方向检测
公开(公告)号：WO2015118163A1
公开(公告)日：2015-08-13
申请号：PCT/EP2015/052719
申请日：2015-02-10
申请人： KATHOLIEKE UNIVERSITEIT LEUVEN , GAS NATURAL SDG, SA
发明人： GONZALEZ DE MIGUEL, Carlos , ALVAREZ GONZALEZ, Eva , GARCIA LOBO, Miguel
IPC分类号： H02H3/08 , H02H3/42 , G01R31/08 , H02H3/347 , H02H3/16 , G01R31/02
CPC分类号： G01R31/086 , G01R31/025 , G01R31/088 , H02H3/105 , H02H3/162 , H02H3/165
摘要： The present invention provides a method and corresponding device for detecting a direction of a ground fault in a multiphase grid whereby said grid comprises at least one means for measuring a current, the method comprising: - receiving at least one signal (lo) from said at least one means for measuring a current; - extracting a fundamental grid frequency component from said at least one received signal; - determining a representative value of the magnitude of said fundamental grid frequency component; - providing at least a first and a second threshold, whereby said first threshold comprises a current threshold (Idirection) and whereby said second threshold comprises a detection time (Tfault) period; - comparing said representative value of the magnitude of said fundamental grid frequency component to the current threshold (Idirection) during or longer than said detection time (Tfault) period, whereby said comparison provides a direction detection of a ground forward fault.
摘要翻译：本发明提供了一种用于检测多相电网中的接地故障方向的方法和相应的装置，其中所述电网包括至少一个用于测量电流的装置，所述方法包括： - 接收来自所述电网的至少一个信号（lo）至少一种测量电流的方法; - 从所述至少一个接收信号中提取基本电网频率分量; - 确定所述基本电网频率分量的幅度的代表值; - 提供至少第一和第二阈值，由此所述第一阈值包括当前阈值（Idirection），并且由此所述第二阈值包括检测时间（Tfault）周期; - 在所述检测时间（Tfault）期间或更长时间内比较所述基本电网频率分量的幅度的所述代表值与所述当前阈值（方向），由此所述比较提供了接地前向故障的方向检测。

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