Control method and system for substation bus from independent operation to parallel operation

Abstract

The invention discloses a control method and system for a substation bus from an independent operation to a parallel operation. When a substation meets an execution condition of a switching instruction, a transformer low switch which is connected with a main transformer which needs to be transferred into maintenance is controlled to turn off and power supply is not carried out; a bus-bar switch between the main transformer which needs to transferred into maintenance and an adjacent main transformer which does not need to be transferred into maintenance is controlled to turn on; and a bus corresponding to the maintained main transformer is powered by the adjacent main transformer which does not need to be transferred into maintenance. Switching from the independent operation to the parallel operation is carried out according to the switching instruction and switch states; manual operation from the independent operation to the parallel operation and manual intervention into judgment are not needed; the parallel operation of the bus is achieved; the operation safety is ensured; the operation time is shortened; the power interruption time is reduced to the minimum as much as possible; the requirements on the safety and the reliability are met; the transformer low switch is firstly turned off and then the bus-bar switch is turned on; in a substation of which a short-circuit current exceeds the standard, the condition of fault explosion of the switch can be effectively avoided; and the power supply safety is ensured.

Description

technical field [0001] The invention relates to the field of power system control, in particular to a control method and system for converting substation busbars from parallel operation to parallel operation. Background technique [0002] At present, the domestic substation operation generally adopts the method of manual operation. The operator performs manual operation according to the content of the operation ticket by singing and repeating, one by one. This method has a long operation time, and the correctness of the operation depends on the experience, responsibility and There are human factors such as mental state, and there are problems of misjudgment and misoperation. [0003] Such as figure 1 As shown, in a double-bus substation, it includes the first main transformer, the second main transformer, the first low-voltage switch, the second low-voltage switch, the bus tie switch, the first bus, the second bus, the first power switch and the second Two power switches, ...

AI Technical Summary

Problems solved by technology

[0005] Based on this, it is necessary to solve the problem of low power supply reliability due to the long time-consuming operation of split-to-parallel operation, and provide a control method and system for substation busbars that can shorten the operation time and improve power supply reliability.

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