| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a digital protective relay system by which the time signal based on a time code format of an IRIG standard is surely received, without being affected by the characteristics and variations in the component devices. <P>SOLUTION: The digital protective relay system includes a demodulation means 1 for demodulating the analog time signal based on the time code format of the IRIG standard as time data, wherein the demodulation means 1 includes a peak value detecting means 4 for detecting a maximum peak value of the time signal received; a threshold setting means 2 for setting a predetermined threshold, based on the maximum peak value detected by the peak value detecting means 4; a level-separating means 5 for separating the level of the time signal based on the threshold set by the threshold-setting means 2, and a square-wave shaping means 6 for generating a square-wave signal based on the signal which is separated in level by the level separating means 5. <P>COPYRIGHT: (C)2007,JPO&INPIT |
