Method for synchronizing clocks of secondary devices on basis of double time correction

A technology for secondary equipment and clock synchronization, which is applied in time-division multiplexing systems, electrical components, multiplexing communications, etc. effect of loss

Active Publication Date: 2018-01-09
POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD
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Problems solved by technology

[0003] The present invention overcomes the above-mentioned technical defect of inaccurate time of the existing secondary equipment, provides a secondary equipment clock synchronization method based on dual time correction, and realizes the clock synchronization of secondary equipment based on the dual time correction mechanism

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  • Method for synchronizing clocks of secondary devices on basis of double time correction
  • Method for synchronizing clocks of secondary devices on basis of double time correction
  • Method for synchronizing clocks of secondary devices on basis of double time correction

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Embodiment Construction

[0037] The accompanying drawings are for illustrative purposes only and cannot be construed as limiting the patent;

[0038] For those skilled in the art, it is understandable that some well-known structures and descriptions thereof may be omitted in the drawings.

[0039] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0040] Such as figure 1 As shown, a secondary device clock synchronization method based on dual time correction includes the following steps:

[0041] S1. Such as figure 2 As shown, record the time difference Δt1 between the Baoxin master station and the Baoxin sub-station: the Baoxin master station actively initiates network time synchronization with each Baoxin sub-station, and the Baoxin master station sends a message with the time stamp t1 of the device to the Baoxin sub-station; When the Baoxin sub-station receives the message from the Baoxin master stati...

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Abstract

The invention discloses a secondary equipment clock synchronization method based on double time correction, which records the time difference between the main station and the sub-station through the network time synchronization between the sub-station and the sub-station; For the network time synchronization of the secondary equipment, record the time difference between the Baoxin sub-station and the secondary equipment in the station; the Baoxin main station forms a rough second level of each secondary equipment based on the time difference between the Baoxin sub-station and the Baoxin sub-station, and the time difference between the Baoxin sub-station and the equipment in the station Time correction value; when a fault occurs in the power grid, the Baoxin master station performs corrections according to the rough time correction value at the second level to complete the rough synchronization of the fault data; the Baoxin master station uses the fault data to obtain an accurate time correction value at the millisecond level and performs corrections , to achieve precise synchronization of the secondary device clock. The invention provides a reference basis for dispatching decision-making, helps to quickly restore power supply, reduces failure losses, and provides a strong guarantee for power grid operation monitoring.

Description

technical field [0001] The present invention relates to the field of clock synchronization, and more specifically, to a clock synchronization method for secondary equipment based on dual time correction. Background technique [0002] The existing fault information system has problems such as inaccurate or even missing protection information upload, untimely information upload, slow command response, slow acquisition of wave recording files, low normal rate of protection communication, and poor practicability of fault analysis, etc., which seriously restrict the fault information system. function application. Among them, the problem of poor practicability of fault analysis is mainly due to the inaccuracy of the clock of the secondary equipment in the substation. Baoxin master station cannot judge the accuracy of the information according to the time of the equipment information when sorting out the fault data, which makes the user unable to directly analyze Fault data, inacc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06
Inventor 焦邵麟曾耿晖李一泉刘玮屠卿瑞张智锐
Owner POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD
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