In-put control method for standby powers of transformer substations

Abstract

The invention provides an in-put control method for standby powers of transformer substations. The method comprises the following steps: determining the connection form of a busbar according to a set logic two-dimensional table; determining the states of a circuit and a busbar tie / section switch before and after an automatic bus transfer device is logically started; under the condition of normal operation, when the circuit or the busbar tie / section switch in a standby supply station exists, permitting the automatic bus transfer device to charge; in the charging state, if starting conditions are met, starting the automatic bus transfer device after a delay; after the automatic bus transfer device is started in the charging state, performing corresponding actions according to action logic. The method can be suitable for different connection forms of transformer substations, can cover the connection form of the current transformer substation, and is not limited by any running way of the transformer substations. The method selects a standby switch which can be closed to transfer according to the determined automatic bus transfer priority order for the circuit and the busbar tie / section switch, and restores power supply of a no-voltage busbar to enable the no-voltage busbar to adapt to the demand of the current power grid.

Description

technical field [0001] The invention relates to the technical field of power grids, in particular to a method for controlling input of a backup power source in a substation. Background technique [0002] Traditional substation standby power input control methods, such as 220kV or 110kV substations, are divided into line standby automatic switching and bus tie (section) standby automatic switching according to the different operation modes of the substation. Line standby self-injection mainly considers that when the busbars of each section are running in parallel, some lines are used as the main power supply, and the other part is used as the backup power supply. When the failure of the main power supply line causes the substation to lose voltage, the fault should be isolated first, and then the backup power supply line should be put into operation. , to restore the power supply of the entire voltage-loss substation; the bus-connection (section) standby automatic switch mainl...

AI Technical Summary

Problems solved by technology

When there is a line backup power supply and the busbars are running separately, the backup power input control must consider the existence of both the line backup automatic switching and the bus coupler (section) backup automatic switching, and they cannot operate at the same time; while the backup power input of the traditional substation The control method cannot handle the relationship between the line standby automatic switching or the bus coupler (section) standby automatic switching, resulting in the use of the standby automatic switching device being limited by the limitations of the wiring type and operation mode of the substation busbar, making it difficult to adapt Current grid needs

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