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Clock synchronization method and system of power distribution terminal

A power distribution terminal and clock synchronization technology, applied in the field of electric power, can solve problems such as low precision

Inactive Publication Date: 2014-01-29
AEROSPACE SCI & IND SHENZHEN GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in order to realize the clock synchronization of each power distribution terminal, the main clock device adopts time synchronization based on the Network Time Protocol (NTP / SNTP) to control the clock of each power distribution terminal to achieve clock synchronization. Usually, the accuracy of clock synchronization can reach 50ms, the accuracy is not high

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  • Clock synchronization method and system of power distribution terminal
  • Clock synchronization method and system of power distribution terminal
  • Clock synchronization method and system of power distribution terminal

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Embodiment 1

[0020] figure 1 The implementation process of the clock synchronization method for power distribution terminals provided in this embodiment is shown. For the convenience of description, only the parts related to the embodiment of the present invention are shown. The implementation process is described in detail as follows:

[0021] S11. When the main clock device sends the first message to the power distribution terminal, the power distribution terminal receives the first hardware time stamp and acquires the second hardware time stamp when receiving the first message, and the first hardware time stamp is the hardware time stamp when the master clock device obtains and sends the first message, and when the power distribution terminal sends the third message to the master clock device, the power distribution terminal obtains and sends the The third hardware time stamp when the third message is described and the fourth hardware time stamp is received, and the fourth hardware time...

Embodiment 2

[0055] figure 2 The system architecture of the clock synchronization system of the first power distribution terminal provided by the second embodiment of the present invention is shown, and for the convenience of description, only the parts related to the embodiment of the present invention are shown. It should be noted that the clock synchronization system for power distribution terminals provided in Embodiment 2 and the clock synchronization method for power distribution terminals provided in Embodiment 1 are applicable to each other.

[0056] A clock synchronization system for a power distribution terminal, the clock synchronization system for a power distribution terminal comprising:

[0057] master clock device 1, and one or more power distribution terminals 2;

[0058] The power distribution terminal 2, when the master clock device 1 sends a first message to the power distribution terminal 2, receives a first hardware time stamp and obtains a second hardware time stamp...

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Abstract

The invention belongs to the field of electric power, and provides a clock synchronization method and system of a power distribution terminal. The clock synchronization method of the power distribution terminal comprises the steps that when main clock equipment sends a first message to the power distribution terminal, the power distribution terminal receives a first hardware timestamp and obtains a second hardware timestamp while receiving the first message, and when sending a third message to the main clock equipment, the power distribution terminal obtains a third hardware timestamp while sending the third message and receives a fourth hardware timestamp; the power distribution terminal determines synchronous clock difference between the clock of the power distribution terminal and the clock of the main clock equipment, and the clock of the power distribution terminal is corrected according to the synchronous clock difference; correct receiving of interactive data between the main clock equipment and the power distribution terminal or among the power distribution terminals is guaranteed.

Description

technical field [0001] The invention belongs to the field of electric power, and in particular relates to a clock synchronization method and system for power distribution terminals. Background technique [0002] The power system is a time-dependent system, and electrical parameters such as voltage, current, and phase angle change based on time. The safe and stable operation of the power grid puts forward new requirements for power distribution terminals, especially for time synchronization, requiring power distribution terminals such as relay protection devices, automation devices, measurement and monitoring devices, energy management systems, and production information management systems to be based on a unified time reference To meet the time consistency requirements of synchronous sampling, system stability judgment, line fault location, fault recording, fault analysis and accident inversion. [0003] At present, in order to realize the clock synchronization of each powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L7/00H04L29/06
Inventor 汪诚王庆海
Owner AEROSPACE SCI & IND SHENZHEN GROUP
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