220kv spare power automatic switching system and judgment method for bus tie spare power automatic switching mode of spare power automatic switching device

Abstract

The invention relates to a 220kV spare power automatic switching system and a judgment method for a bus tie spare power automatic switching mode of a spare power automatic switching device. The judgment method for the bus tie spare power automatic switching mode of the spare power automatic switching device comprises the following steps of: 1) judging whether the spare power automatic switching device accords with a charging condition; 2) judging whether a main power supply circuit which has current before and does not have current now exists; 3) judging whether one bus does not have voltage, and the other bus has voltage; and 4) judging whether a knife switch of a spare power automatic switching circuit is closed on the bus with voltage loss, if so, tripping switches of all main power supply circuits which do not have current, and sending a closing command to a switch on the spare power automatic switching circuit of which the knife switch is closed on the bus with voltage loss, otherwise, tripping switches of all main power supply circuits which do not have current, and sending a closing command to a bus tie switch. By the judgment method for the bus tie spare power automatic switching mode of the spare power automatic switching device, the spare power automatic switching device can be comprehensively judged, and an action result is reasonable.

Description

technical field [0001] The present invention relates to a 220kV substation standby automatic switching system, which mainly includes a standby automatic switching device, a 220kV bus bar, a bus tie switch, a main supply line, a backup switching line, and a load line, and also relates to a standby automatic switching device suitable for the system method of judgment. Background technique [0002] Such as figure 1 As shown, the standby automatic switching system in the prior art includes the standby automatic switching device, 220kV bus bars 1 and 2, the main supply line 3, the backup switching line 4, the load line 5, and the bus tie switch 6, and the bus tie switch 6 is connected to the bus bar Between 1 and 2. The main supply line 3 is respectively connected to the bus 1 and the bus 2 through its switch 30 and two knife switches 31 and 32 . When the main power supply line 3 is in the power supply running state, the switch 30 is in the closed position, and the main power ...

AI Technical Summary

Problems solved by technology

[0018] 3) The load capacity of the backup line is idle: the bus-connection backup mode is started, and the voltage-free bus can be restored only by closing the bus-tie switch, and the power supply for the loss-of-voltage bus is realized without a combined backup line switch

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