TRANSMISSION LINE AUTOMATIC RESTORATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a transmission line automatic restoration system capable of reducing risk such as shock given to a power system by trial charge.

SOLUTION: An automatic restoration device with a FL function 20 installed on the power reception end side of a transmission line L comprises: a fault point impedance calculation circuit 21 for calculating fault point impedance Z on the basis of second bus line voltage V2of a power reception end bus line B1and second line current I2flowing on the power reception end side of the transmission line L; a fault point determination circuit 22 for determining whether or not a fault point of a transmission line fault is at a position farther than the intermediate point of the transmission line L, on the basis of the calculated fault point impedance Z; and a breaker insertion signal generation circuit 23 and breaker insertion signal output circuit 24 for performing trial charge into the transmission line L earlier than an automatic restoration device 10 installed on the power transmission end side of the transmission line L, when it is determined by the fault point determination circuit 22 that the fault point is at the position farther than the intermediate point of the transmission line.

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