| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a digital current differential protective relay wherein even when a transmitted bit error occurs, the time for which a protective function is locked for recovery can be shortened. <P>SOLUTION: A transmission control unit 9 transmits all the end data required for differential computation by a computation unit 11 at the other end in one transmission cycle. At this time, the transmission control unit uses a transmission format for high-speed communication with which multiple pieces of data can be transmitted in one transmission cycle, for example, a transmission format used in transmission paths with a transmission rate of 2,048 kbps, as a transmission format used in the transmission path provided between both ends. Therefore, when data in the transmission cycle of this time is normal, the following can be implemented: even if a transmitted bit error occurs in any other preceding transmission cycle, only data in the transmission cycle of this time can be used to carry out differential computation without waiting for a data re-accumulation time. <P>COPYRIGHT: (C)2009,JPO&INPIT |
