Synchronous sampling method based on short-frequency wireless in transient recording fault indicator

Abstract

The invention belongs to the field of intelligent distribution networks, and relates to a related communication technology in a recording fault indicator, in particular to a synchronous sampling method based on short-frequency wireless in a transient recording fault indicator. A collecting unit in a three-phase line is started, a gathering unit sends a synchronous timing command to the collectingunit, the timing command includes a timing label, and the gathering unit can find the corresponding absolute time according to the label; the collecting unit receives the timing command, and performssupplementation point and zero clearing processing through timing collection of values of a counter to allow the counter to eliminate the error caused by the crystal oscillator and maintain the three-phase synchronous collection. The method adopts the wireless communication technology and the synchronous command to achieve the interaction between the line gathering unit and the collecting unit toreduce the power consumption of the device, save the hardware cost, reduce the requirements for accuracy and stability of the crystal oscillator, and ensure the simultaneous sampling between line status monitors.

Description

technical field [0001] The invention belongs to the field of intelligent distribution network, and relates to a communication technology related to a wave-recording fault indicator, in particular to a short-frequency wireless-based synchronous sampling method in a transient wave-recording fault indicator. Background technique [0002] With the development of smart distribution network, the intelligent distribution network line status monitoring system can accurately judge and locate line faults through effective monitoring of the line, so as to improve the efficiency of operation and maintenance, which is the development trend of smart distribution network. [0003] At present, the fault indicators of transient recording type in smart distribution network generally require synchronous real-time monitoring and sampling of three-phase power, which is of great significance to the effectiveness of monitoring and the judgment and location of line faults. There are currently two c...

AI Technical Summary

Problems solved by technology

The advantage of this solution is that it can eliminate the cumulative error caused by the crystal oscillator. Compared with the first solution, the amount of transmitted data is relatively small; the disadvantage is that the power consumption of GPS time synchronization is relatively large, and each phase line status monitor must have a GPS The receiving device also needs a high-precision crystal oscillator, which increases the hardware cost

Images