Method for controlling multi-terminal backup power supply input of substation

Abstract

The invention provides a method for controlling multi-terminal backup power supply input of a substation, which comprises the steps of 1, automatically identifying and distinguishing a main power supply and multiple backup power supplies when the substation is in operation; 2, setting different priorities for the identified multiple backup power supplies; 3, when the main power supply of the substation breaks down, automatically isolating the failure power supply; 4, sequentially calling the multiple backup power supplies to serves as a new main power supply to supply power to the substation according to the priority from high to low; 5, judging whether normal power supply of the substation is recovered or not when each backup power supply is used to serve as the new main power supply, returning back to the step 4 to continuously call the backup power supply of the next priority if the normal power supply is not recovered, and executing a step 6 if the normal power supply is recovered;and 6, suspending the continuous calling if the backup power supply is successfully input. The method meets a requirement that each power supply of the substation serves as a backup power supply in respectively different modes to supply power to the substation when there is a failure, and adopts an isolation mode to avoid closed loop operation at the same time, thereby not only improving the working efficiency of a power grid, but also reducing the operation risk.

Description

technical field [0001] The invention relates to the technical field of power grids, in particular to a method for controlling the input of multi-terminal backup power sources in substations. Background technique [0002] With the development of the economy, the reliability of power supply is required to be higher and higher, so the construction scale of some important substations is also getting larger and larger. The power of the same substation often comes from three or more power points. Due to the short-circuit current exceeding the standard and other reasons, the power of a substation normally comes from only one power point, and other power points are used as backup. Therefore, when the main power supply fails, how to ensure that the normal backup power supply is put into operation is very critical. [0003] At present, the backup power input device of the substation generally only considers one main power supply and one backup power supply, which cannot meet the situ...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for controlling the input of multi-terminal backup power sources in substations. Large-scale power outages, solving the problem that traditional methods cannot restore power supply by investing in other backup power sources

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