DEVICE FOR DISCONNECTION DETECTION AND METHOD THEREFOR

PROBLEM TO BE SOLVED: To provide a device for disconnection detection that detects one-line disconnection in a transmission line for connecting power supplies at both terminals with each other and can surely detect the disconnection without increasing facilities, and provide a method therefor.SOLUTION: A device 10 for disconnection detection detects one-line disconnection in a transmission line 101 in a state where two electric power stations respectively provided with power-generating facilities are connected to both end terminals of a three-phase power line and where power generators 111 and 121 of internal combustion power plants B and C are operating, and the device comprises a processing part 12 that is provided in at least one of the internal combustion power plants B and C and checks power to be transmitted to the opposed internal combustion power plant. The processing part 12 determines that the one-line disconnection occurs in the transmission line 101 on the basis of: a first requirement that a three-phase line voltage value is unchanged; and a second requirement that the power to be transmitted to the opposed internal combustion power plant is changed from a value showing three-phase power to a value showing single-phase power.SELECTED DRAWING: Figure 1 【課題】 両端電源を結ぶ送電線の１線断線を検出し、設備の増加を伴うことがなく、確実に断線を検出することができる断線検出装置およびその方法を提供する。【解決手段】 発電設備をそれぞれ備える２つの電気所が三相用電線の両端に接続され、かつ、内燃力発電所Ｂ、Ｃの発電装置１１１、１２１が稼動している状態で送電線１０１の１線断線を検出する断線検出装置１０であって、内燃力発電所Ｂ、Ｃの少なくとも１つに設けられ、対向する内燃力発電所に送られる電力を調べる処理部１２を備え、処理部１２は、三相の線間電圧の値が変化していないという第１の要件と、対向する内燃力発電所に送られる電力が三相電力を表す値から単相電力を表す値に変わったという第２の要件とにより、送電線１０１に１線断線が発生したと判定する。【選択図】 図１