A Data Source-End Synchronization Method for Improving the Reliability of Smart Substation

Abstract

The invention discloses a data source synchronization method for improving the reliability of an intelligent substation. The synchronization method is improved from the data source in the SV networking mode, effectively reducing the dependence of the entire intelligent substation system on the time synchronization system, and solving the problem of abnormal reception of satellite signals. Such as signal loss or weak signal strength, low signal-to-noise ratio, etc., the main protection of the whole station exits due to lost seconds, skipped seconds, etc., which greatly improves the operational reliability of the network sampling system. Since the improved method does not need to add an additional time synchronization system, there is no change to the existing system structure, the time synchronization device and MU need to be improved, and there is no requirement for the protection device, so it has wide applicability and has the conditions for large-scale promotion. This method is not suitable for applications across substations, 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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