| 摘要 |
PROBLEM TO BE SOLVED: To obtain a protection system for power system in which detail data can be utilized quickly even at a remote control station upon occurrence of fault in a digital protective relay. SOLUTION: Upon delivery of a circuit breaker trip command from a protective relay 21, system information before and after delivery of the trip command is stored in a memory 212 and data is delivered to the slave station 11 of a relevant electric station in case of continuous fault. A data collector 112 in the slave station 11 picks up data required for fault analysis from data delivered from each protective relay and transmits the data to the control section while sorting in time series.
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