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Concentrator accurate time synchronization method based on quadratic iterative algorithm

A secondary iteration and concentrator technology, applied in the direction of time division multiplexing system, electrical components, multiplexing communication, etc., can solve the problems of large timing error and unavoidable communication link delay, etc., and achieve accurate Stable work, avoid confusion, and ensure the effect of precise execution

Pending Publication Date: 2020-12-18
JIANGSU ELECTRIC POWER CO +1
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Problems solved by technology

[0002] The time synchronization system of the power consumption information collection system mainly uses the NTP network clock or GPS clock as the clock source, which synchronizes the time with the main station and server of the power consumption information collection system every day, and the collection terminal uses the main station of the collection system The clock of the station is used as the reference for time synchronization, and the concentrator is used for time synchronization by the acquisition master station. GPRS is used as the communication link. The clock deviation mainly comes from the GPRS communication delay, but the delay of the communication link is inevitable. At present, the time synchronization error larger

Method used

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Embodiment 1

[0031] A concentrator accurate time synchronization method based on the second iteration algorithm of the present embodiment includes the following steps:

[0032] A, master station and concentrator two-way connection, simultaneously, concentrator requests time synchronization to master station; In described step A, time synchronization algorithm is:

[0033] make but

[0034] when t 1

[0035] when t 1 When >T,

[0036] Among them, t1: the concentrator requests the time synchronization command from the master station; T1: the master station receives the time synchronization request command time clock from the concentrator; T2: the master station sends the time synchronization command time clock to the concentrator; t2: the master station Send the time synchronization command transmission time to the concentrator; t: the time synchronization clock of the concentrator.

[0037] B, carry out NTP server time synchronization afterwards; Synchronization method is as f...

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Abstract

The invention relates to a concentrator accurate time synchronization method based on a quadratic iterative algorithm, which comprises the following steps that: A, bidirectionally connecting a masterstation with a concentrator, and meanwhile, requesting time synchronization from the master station by the concentrator; B, performing NTP server time synchronization; C, performing synchronization maintenance; and D, finally, carrying out timing filtering. The concentrator clock is ensured to be consistent with the master station standard clock, the time synchronization precision is improved, thetime calibration precision can be controlled within 1 second, and the overall time calibration precision requirement of a power utilization information acquisition system can be completely met.

Description

technical field [0001] The invention relates to a time synchronization system, in particular to an accurate time synchronization method for a concentrator based on a second iteration algorithm. Background technique [0002] The time synchronization system of the power consumption information collection system mainly uses the NTP network clock or GPS clock as the clock source, which synchronizes the time with the main station and server of the power consumption information collection system every day, and the collection terminal uses the main station of the collection system The clock of the station is used as the reference for time synchronization, and the concentrator is used for time synchronization by the acquisition master station. GPRS is used as the communication link. The clock deviation mainly comes from the GPRS communication delay, but the delay of the communication link is inevitable. At present, the time synchronization error larger. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06
CPCH04J3/0667
Inventor 冯承超李铭潘阳邱星高健
Owner JIANGSU ELECTRIC POWER CO
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