Method, device and equipment of inter-tripping small power supplies for reclosing, and storage medium

Abstract

The invention discloses a method, device and equipment of inter-tripping small power supplies for reclosing, and a storage medium. Whether an outlet line is directly connected with a small power supply is determined by searching for the small power supply line flag bit of the outlet line connected with a substation. If the outlet line is directly connected with a small power supply, there is onlythe need to disconnect the circuit breaker of the outlet line and send an updated small power supply inter-tripping instruction to an adjacent substation. If the outlet line is not directly connectedwith a small power supply, the circuit breaker of the outlet line does not need action. If the small power supply line flag bit of the outlet line of the adjacent substation is directly connected witha small power supply, the circuit breaker of the outlet line of the adjacent substation is disconnected. The line connection between the substation and the adjacent substation is intact, and the blackout scope is reduced. If we want to realize the function of inter-tripping small power supplies, we can only remove all lines connected with the substation and containing small power supplies. Amongall the lines, the lines connected to the substation but not containing small power supplies must be removed together, which will easily lead to a larger blackout scope. The technical problem is solved by using the technical scheme of the invention.

Description

technical field [0001] The invention relates to the technical field of relay protection control, in particular to a method, device and storage medium for reclosing and switching off a small power supply. Background technique [0002] In order to improve the reliability of power supply, reclosing is required when the transmission line fails and the line protection trips. However, when there are many small hydropower stations or new energy power stations in the area, there will be a problem that the backup power supply and the small power supply will run in parallel during the reclosing operation, so it is necessary to cut off the small power supply before reclosing. [0003] At present, after the line protection operates, one side of the circuit breaker is connected to the system, and the other side is connected to a small power supply through a branch circuit. In this case, only when the frequency of the power supply on both sides is stable and the angle difference is small...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method, device, and storage medium for reclosing and switching small power sources, which solves the problem that in a substation, if you want to realize the function of switching small power sources, you can only cut off the substation connected to the substation and contain small power sources. All lines, among all lines, the lines connected to the station but not containing small power sources must also be cut off together, which will easily cause technical problems such as expanding the scope of power outages

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