Time synchronizing method and system thereof

Abstract

The invention discloses a time synchronizing method and a system thereof. The method comprises the steps of when data collecting equipment detects a fact that a receiving time window of a time synchronizing pulse signal is effective, receiving a time synchronizing pulse signal; generating a time synchronizing data packet based on the time synchronizing pulse signal and transmitting to data acquisition equipment; when the data acquisition equipment receives the time synchronizing data packet which is transmitted by the data collecting equipment in a wireless communication manner, recording a clock counting value; based on two adjacent clock counting value which are recorded, calculating a local time interval; subtracting a preset standard time interval from the local time interval for obtaining a time interval error; determining whether the time interval error is larger than an error threshold; if yes, adjusting a sampling parameter of the data acquisition equipment, and otherwise, preventing adjustment of the sampling parameter. The time synchronizing method and the system thereof greatly reduces time delay of the time synchronizing data packet and furthermore controls the time delay in a predictable range.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a time synchronization method and system. Background technique [0002] The global power backbone network is a three-phase AC power system with a frequency of 50Hz or 60Hz. In order to ensure the stable operation of the power system, it is necessary to accurately measure the voltage and current of the three-phase AC. Modern mainstream measurement technologies are all computer-based digital measurement technologies. First, the high-voltage and high-current signals (that is, the primary signal of the power system) are converted into small-amplitude signals suitable for measurement through voltage and current sensors (or transformers). The voltage or current signal (that is, the secondary signal of the power system) is then sent to the ADC (Analog-to-Digital Converter) to be quantized and converted into a digital signal, and the collected signal is converted and calc...

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a time synchronization method and system. The present invention solves the problem that the transmission of time synchronization information in the prior art will introduce additional and uncertain delays. The present invention uses a time synchronization module instead of the CPU to perform Time synchronization, the time synchronization module only receives time synchronization data packets when the time window is valid, which greatly reduces the delay of time synchronization data packets and controls the delay within a predictable range

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