发明授权
- 专利标题： VERFAHREN UND ANORDNUNG ZUM ÜBERWACHEN VON STROMVERSORGUNGSNETZEN
- 专利标题（英）： Method and device for monitoring power-supply networks
- 专利标题（中）： 方法和监测系统的电源供应网络
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申请号： EP95927651.0申请日： 1995-08-09
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公开(公告)号： EP0776478B1公开(公告)日： 1999-05-12
- 发明人: KÖCK, Gerd
- 申请人： SIEMENS AKTIENGESELLSCHAFT
- 申请人地址： Wittelsbacherplatz 2 80333 München DE
- 专利权人： SIEMENS AKTIENGESELLSCHAFT
- 当前专利权人： SIEMENS AKTIENGESELLSCHAFT
- 当前专利权人地址： Wittelsbacherplatz 2 80333 München DE
- 优先权： DE4430246 19940825
- 国际公布： WO9606360 19960229
- 主分类号： G01R23/16
- IPC分类号： G01R23/16 ; G01R31/42
摘要：
In the method proposed, spectral values are calculated from sampled network-voltage or network-current values by discrete Fourier transform techniques. Of these spectral values, only those which are greater than a given threshold value (SW) are transmitted further or stored. In order to reconstruct the sampled values, the missing spectral values are assumed to be zero. In general, only those spectral values are transmitted further or stored which are associated with a fault and a previous and subsequent history of several seconds. The invention is suitable for use in fault recorders.
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