Title:
【発明の名称】電力供給系統の監視方法および装置
Document Type and Number:
Japanese Patent JP3414746
Kind Code:
B2
Abstract:
PCT No. PCT/DE95/01051 Sec. 371 Date Apr. 30, 1997 Sec. 102(e) Date Apr. 30, 1997 PCT Filed Aug. 9, 1995 PCT Pub. No. WO96/06360 PCT Pub. Date Feb. 29, 1996Spectral values are calculated from sampling values of the network voltage or current using the discrete Fourier transformation. Of these values, only those that are greater than a predefined threshold value (SW) are transmitted or stored. The missing spectral values are assumed to be equal to zero to reconstruct the sampling values. In general only those spectral values are transmitted or stored that pertain to a fault and its previous and subsequent history of a few seconds.
Inventors:
Keck, Gerd
Application Number:
JP50768896A
Publication Date:
June 09, 2003
Filing Date:
August 09, 1995
Export Citation:
Assignee:
Siemens Aktiengesellschaft
International Classes:
G01R19/25; G01R31/00; G01R31/08; G01R31/42; G08C19/00; H02J13/00; H04Q9/00; G01R23/16; (IPC1-7): G01R23/16; G01R31/00; G01R31/02; G01R31/08; G08C19/00; H02J13/00; H04Q9/00
Domestic Patent References:
| JP6165263A |
Other References:
【文献】欧州特許出願公開477690(EP,A1)
【文献】国際公開93/03530(WO,A1)
【文献】国際公開93/03530(WO,A1)