A method of automatic switching operation of 10kv standby substation

Abstract

The invention relates to a 10kV standby automatic switching operation method of a substation, which is realized based on the following wiring structure: a first main transformer, a first busbar connected to the first main transformer through a first low-voltage switch, a second main transformer, through the second transformer The low switch is connected to the second bus of the second main transformer, the third bus of the second main transformer is connected through the third low switch, the third bus is connected to the fourth bus of the third main transformer through the fourth low switch, and the The first grounding switch connected to the first busbar, the second grounding switch connected to the second busbar, the third grounding switch connected to the fourth busbar, the first segment switch connecting the first busbar to the second busbar, and the The second segment switch of the four busbars and the third busbar; the method includes detecting that any busbar loses voltage, the lowering switch of the busbar has no current, the position of the lowering switch is 1 after closing, and the other normal busbars have voltage, then The time delay trips the low switch and the grounding switch on the voltage loss bus again. The invention can realize the self-cutting of the grounding transformer after the 10kV backup is switched on automatically.

Description

technical field [0001] The invention relates to the technical field of automatic switching of substation backup, in particular to a 10kV backup automatic switching operation method of a transformer substation. Background technique [0002] Electricity consumption has a symbolic role as an economic barometer. As a high-quality energy source, electric energy plays an indispensable role in the rapid economic development of various regions. Therefore, the safety and reliability of the power supply system of substations has become the focus of attention. In order to ensure the operation stability of the power grid and reduce the short-circuit current when the fault occurs, the 10kV low-voltage side of the main transformer in the 220kV and 110kV substations is usually operated in split operation. In the split operation mode, the failure of the line or equipment will easily lead to the 10kV low voltage of the substation. When the side busbar loses voltage and the working power supp...

AI Technical Summary

Problems solved by technology

When the 110kV main transformer fails and the faulty equipment is removed, the 10kV bus bar powered by the faulty main transformer loses the power supply, causing users on the 10kV feeder line to be unable to use electricity normally. At this time, the backup self-inverting action is required to restore the normal power supply of the voltage-loss bus bar

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