Time synchronization method for fault indicator of transient wave record type

Abstract

The invention discloses a time synchronization method for a fault indicator of a transient wave record type, and the method comprises the steps that a convergence unit broadcasts a synchronization beacon frame to each collection unit for synchronization; each collection unit transmits a data frame comprising a synchronization byte to other collection units and the convergence unit, and each collection unit monitors the data frames of other collection units, and marks the data frames with the synchronization bytes; two collection units which transmit the data frames at first carry out the synchronization of local time with the collection unit which transmits the data frame at last according to the relative time drift and relative initial time difference; the convergence unit carries out thesynchronization of all data frames according to the obtained time difference. The method achieves the local synchronization of the collection units, and achieves the post-synchronization of the dataframes in the convergence unit.

Description

technical field [0001] The invention belongs to the technical field of state monitoring and fault location of power system distribution network, and in particular relates to a time synchronization method applied to a fault indicator of a transient recording type. Background technique [0002] In the distribution network system, there are many branches and complex operation conditions. When a short circuit or ground fault occurs, it is difficult to determine the fault section, which brings great difficulties to the maintenance work, especially in remote areas, and it takes time and effort to find it. With the advancement of distribution automation and rural power grid transformation in my country, fault indicators, as one of the technical means of distribution fault location, have been put into use in large quantities. Due to the low accuracy of traditional two-remote fault indicators for single-phase ground faults, the State Grid began to implement transient recorder fault i...

AI Technical Summary

Problems solved by technology

According to the statistics of the State Grid, the time synchronization accuracy of the current transient recording type fault indicators of various manufacturers cannot reach the synchronization error of 100μs in the special detection, which will inevitably affect the accuracy of the synthesized transient zero-sequence current, resulting in single-phase The inaccurate judgment of the ground fault affects the application effect of the fault indicator of the transient recording type

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