| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a protection relay system capable of shortening the accident duration time and also capable of narrowing the power outage range for easy restoration of a system. <P>SOLUTION: The current of a line connected to the bus line of a power grid is detected. To a protection equipment for detecting a bus line accident, a function for preferentially selecting and shielding the line seems to be having an accident by various methods is added when the accident continues (that is, at post-provided protection). <P>COPYRIGHT: (C)2005,JPO&NCIPI |
