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A clock synchronization method for secondary equipment based on double time correction

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

Active Publication Date: 2019-02-22
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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  • A clock synchronization method for secondary equipment based on double time correction
  • A clock synchronization method for secondary equipment based on double time correction
  • A clock synchronization method for secondary equipment based on 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] like figure 1 As shown, a secondary device clock synchronization method based on dual time correction includes the following steps:

[0041] S1. like 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 station, ad...

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Abstract

The invention discloses a method for synchronizing clocks of secondary devices on the basis of double time correction. The method includes allowing information protection master stations to actively initiate network time synchronization with information protection substations and recording time difference between the information protection master stations and the information protection substations; allowing the information protection substations to initiate network time synchronization with the in-station secondary devices and recording time difference between the information protection substations and the in-station secondary devices; forming second-level rough time amendment values of each secondary device by the information protection master stations according to the time difference between the information protection master stations and the information protection substations and the time difference between the information protection substations and the in-station secondary devices;carrying out correction by the information protection master stations according to the second-level rough time amendment values when power grids fail and roughly synchronizing failure data; acquiringmillisecond-level precise time amendment values by the information protection master stations by the aid of the failure data and carrying out correction to precisely synchronize the clocks of the secondary devices. The method has the advantages that reference bases can be provided for dispatching decision making, the method is beneficial to quickly restoring power supply, loss due to failure can be reduced, and power grid operation monitoring can be powerfully guaranteed.

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 Patents(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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