A high-voltage current monitoring time synchronization system and time synchronization method

Abstract

The invention relates to a high-voltage current monitoring time synchronization system and a time synchronization method. A collector sends a time synchronization command to each high-voltage current monitoring device; The compensation value includes the time synchronization preparation time of the collector, the time synchronization command frame transmission time of the collector, and the time synchronization response time of the high-voltage current monitoring device. The present invention has undergone theoretical calculation and experimental verification. Under the premise of software and hardware guarantees, the scheme can repeatedly calculate the average value. The average value of the delay time of ΔT is 260uS, which can ensure the dispersion of 45uS. After 260uS of synchronous compensation for time calibration, the dispersion of 45uS meets the deviation requirement of the three-phase current clock less than 100μs. The present invention does not use a professional time service system such as Beidou, but uses an ordinary real-time clock chip, and has low cost, and the time service system is simple and effective.

Description

technical field [0001] The invention relates to the technical field of passive high-voltage current monitoring, in particular to a high-voltage current monitoring time synchronization system and a time synchronization method. Background technique [0002] High-voltage lines are an important part of the power transmission system. By deploying current monitoring devices at different branches or nodes of the line, it is possible to monitor and analyze line loss, abnormal power consumption or fault analysis, which greatly shortens the time to find the faulty section and provides anti-theft wire Loss analysis, rapid troubleshooting, and restoration of normal power supply provide a strong guarantee. [0003] Passive current monitoring device is a small device for long-term monitoring of current. It consists of a self-power supply unit, a current measurement unit, a storage unit, a communication unit, and a real-time clock unit. It has the functions of real-time monitoring of bra...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of realizing the synchronization of high-voltage current monitoring devices in a low-cost manner, the present invention provides a high-voltage current monitoring time synchronization system and a time synchronization method. Based on the acquisition system of the existing high-voltage current monitoring devices, the collector provides each high-voltage current monitoring The device sends the time synchronization command to ensure the consistency of the delay of each time synchronization command; each high-voltage current monitoring device, after receiving the same time calibration command, makes the same synchronization compensation value, and realizes the high-voltage current monitoring device in a low-cost way. High-precision synchronization

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