Multi-source dynamic self-adaptation clock synchronization method and device

Abstract

The invention discloses a multi-source dynamic self-adaptation clock synchronization method and device. The multi-source dynamic self-adaptation clock synchronization method includes the following steps that (a) roll poling is carried out on reference sources and whether the reference sources are valid or not is judged; (b) when the reference sources in the step (a) are valid, the total priority score M of each valid reference source is calculated, and when a certain reference source in the step (a) is invalid, the total priority score of the invalid reference source is N, wherein M is larger than N; (c) the total priority scores, obtained in the step (b), of the reference sources are sequenced, and the reference source with the highest priority score is taken as an automatic source selection result; (d) whether an automatic source selection switch is turned on or not is judged, and when the automatic source selection switch is turned on, the current reference source is the automatic source selection result obtained in the step (c). Due to the facts that the reference source with highest time service accuracy is obtained from the multiple reference sources and is taken as the current reference source, time service accuracy is improved, and use safety and reliability of a power grid and a transformer substation are guaranteed.

Description

technical field [0001] The invention relates to the technical field of substation time synchronization devices, in particular to a multi-source dynamic adaptive clock synchronization method and device. Background technique [0002] In substations of different levels, there are many equipments that require accurate timing of time synchronization devices, such as safety automatic devices, electric energy collection devices, line traveling wave fault distance measurement devices, synchrophasor measurement devices, fault recorders, etc. Therefore, the time Synchronization devices are of great significance to the safe and reliable operation of substations and power grids. [0003] The traditional time synchronization device uses the GPS signal as the reference source. When in use, the GPS signal is sometimes blocked, and the GPS signal receiver may malfunction, resulting in insufficient timing accuracy of the time synchronization device in the substation, or even a timing error. ...

AI Technical Summary

Problems solved by technology

[0003] The traditional time synchronization device uses the GPS signal as the reference source. When in use, the GPS signal is sometimes blocked, and the GPS signal receiver may malfunction, resulting in insufficient timing accuracy of the time synchronization device in the substation, or even a timing error. And the safety and reliability of substations have brought great hidden dangers

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