Data source end synchronization method for improving reliability of intelligent transformer substation

Abstract

The invention discloses a data source end synchronization method for improving the reliability of an intelligent transformer substation. In an SV networking mode, the synchronization method is improved from a data source, the relying of the whole intelligent transformer substation system on a time synchronization method is effectively reduced, the problems of whole station main protection exiting caused under the conditions of second loss, second hopping and the like during satellite signal receiving abnormality such as signal loss or low signal intensity and low signal-to-noise ratio are solved, and the operation reliability of a network sampling system is greatly improved. The improvement method has the advantages that the additional addition of the time synchronization system is not needed, the existing system structure is not changed, a time synchronization device and an MU need the improved design, and no requirement is required for a protection device, so that the applicability range is wider, and the large-area popularization condition is realized. The method is not applicable to the cross-transformer-substation application, such as wide area protection and optical fiber differential protection.

Description

technical field [0001] The invention belongs to the field of relay protection and automation in intelligent substations, and specifically relates to a method for solving the data synchronization problem in a networking mode, reducing dependence on a clock synchronization device, and improving system operation reliability. Background technique [0002] Foreign smart grid research focuses on the construction of distribution network, demand side, and new energy. In terms of smart substations, it is still mainly in the stage of theoretical function and structural design, and there is no systematic smart substation construction plan. [0003] Domestic research on intelligent substation technology has achieved initial results. Domestic manufacturers have been able to provide a full range of equipment for station control, bay and process levels in intelligent substations, including electronic transformers and merging units, digital interface intelligent terminals, A full range of d...

AI Technical Summary

Problems solved by technology

[0006] 2) There are disputes over networking and direct mining methods;

[0007] 3) Lack of testing methods and testing equipment for smart substations, and the legality of digital measurement has not been recognized;

[0008] 4) There is a lack of a unified data platform between the auxiliary systems and between the auxiliary systems and the automation system in the station

Once the network fails, the function of the secondary equipment will be seriously affected, or even fail, directly affecting the safe and stable operation of the power grid

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