Automatic-switching device system and method of standby power source

Abstract

The invention discloses an automatic-switching device system and method of a standby power source. According to the automatic-switching device system and method of the standby power source, the safety performance is high, faults of a bus are automatically judged, corresponding action strategies are executed according to fault point positions, the faults are isolated, and power supplying is recovered. The automatic-switching device system comprises an inlet wire M, an inlet wire N, the bus, a standby power source automatic-switching device and a segment combining unit, wherein the inlet wire M and the inlet wire N are connected with the bus, the bus is connected with the segment combining unit, the segment combining unit is connected with a collecting plate, and the collecting plate is connected with a protection plate and a management plate. The suitable running mode of an LBZT1 is that the inlet wire M serves as a standby, the inlet wire N runs and a segment switch serves as a standby. The suitable running mode of an FBZT is that the inlet wire M runs, the inlet wire N runs and the segment switch serves as a standby. By means of the automatic-switching device system and method, the safety performance of the device is improved, and power supplying can be recovered.

Description

technical field [0001] The invention relates to the field of electric power facilities, in particular to a backup power supply automatic switch-on device system and an automatic switch-on method thereof. Background technique [0002] When the traditional backup power self-injection device is applied to a 110kV single-bus segmented substation, when a permanent fault occurs on the bus, since the 110kV bus is generally not equipped with dedicated bus protection, the differential protection range of the main transformer does not include the 110kV bus. The bus failure will be cut off by the relay protection action on the power supply side of the power supply line. After the bus loses voltage, the backup power self-injection device will operate. Figure 5 Shown: [0003] (1) When the operation mode is that power supply 1 UL1 and power supply 2 UL2 supply power to mother I and mother II respectively, and the sub-section 3DL switch is used for backup, and the backup power self-injec...

AI Technical Summary

Problems solved by technology

"For traditional substations, due to the limited input channel of the analog quantity of the backup power self-injection device, 1DL and 2DL switches generally only introduce one-phase current for the identification of current blocking, and cannot identify bus faults, and the device does not have the ability to switch to the faulty bus The function of taking protective measures later.

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