Synchronous Sampling Method Based on Short-Frequency Wireless in Transient Recording Type Fault Indicator

Abstract

The invention belongs to the field of intelligent distribution network, relates to the relevant communication technology in the wave-recording type fault indicator, in particular to a synchronous sampling method based on short-frequency wireless in the transient wave-recording type fault indicator, which can start the three-phase line The collection unit, the collection unit sends a synchronous time synchronization command to the collection unit, and the time synchronization command contains a time synchronization label, and the collection unit can find the corresponding absolute time according to this label; the collection unit receives the time synchronization command and collects the counter value according to the timing Do supplementary and zero-clearing processing to eliminate the error caused by the crystal oscillator and maintain three-phase synchronous acquisition. The inventive solution uses wireless communication technology and synchronous commands to realize the interaction between the line collection unit and the acquisition unit, which not only reduces the power consumption of the equipment, saves hardware costs, but also relaxes the requirements on the precision and stability of the crystal oscillator. And it ensures the synchronous sampling among the line state 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

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