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A line optical difference synchronization method based on HSR

A line and message technology, applied in the field of line optical difference synchronization based on HSR, can solve the problems of multi-terminal data external interface mode and network topology to be studied, and achieve the effect of high synchronization accuracy, flexible engineering application and strong compatibility

Inactive Publication Date: 2019-05-31
NANJING DIANYAN ELECTRIC POWER AUTOMATION
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AI Technical Summary

Problems solved by technology

Therefore, the external interface mode and network topology suitable for multi-terminal data need to be studied

Method used

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Embodiment Construction

[0020] The present invention will be further described below. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0021] The invention adopts the network topology structure and communication mechanism of HSR, continues to use the message type and format of HSR, and other mature technologies, and realizes N (N≥2) end optical fiber differential protection. details as follows:

[0022] 1. Establish a two-way redundant double-ring network structure, and the two ring networks are independent of each other; in each ring network, nodes are connected end-to-end through Ethernet to form a two-way redundant ring. Each node in the ring is in a peer-to-peer relationship, and is responsible for forwarding and filtering messages in the ring and broadcasting the information of the node.

[0023] 2. Using HSR's ring network delay measurement technology, the path del...

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Abstract

The invention discloses a line optical difference synchronization method based on HSR. The line optical difference synchronization method comprises the following steps: establishing a bidirectional redundant double-ring network structure; performing looped network delay measurement; processing sampling data synchronously; performing ring network topology monitoring; reazlizing state quantity datatransfer. A mature HSR technology is utilized, a sampling synchronization scheme does not depend on a synchronous clock source, the synchronization precision is high, and N (N is larger than or equalto 2) end differential motion can be achieved. The channel delay is not considered, and when the number of the device nodes in the ring network is not more than 16, the delay time of the message in the ring network is not more than 1ms. The HSR network connection technology is utilized, the long-distance self-healing ring network can be achieved, and the network nodes are flexible in configurationand easy to maintain.

Description

technical field [0001] The invention relates to an HSR-based line optical difference synchronization method. Background technique [0002] For optical fiber differential protection, data synchronization is the core issue. At present, the time adjustment method and the sampling data adjustment method are mainly used. The former adopts the master-slave mode, the master is used as the reference terminal, and the slave is used as the synchronization terminal. The channel delay is calculated through the ping-pong algorithm, and the sampling time is adjusted according to the sampling time of the master terminal to achieve the purpose of data synchronization on both sides. During synchronization, the differential protection is automatically disengaged. Since only small step adjustments are made each time, the synchronization process takes a long time. Especially when the host has frequency adjustment. If the frequency adjustment is too large, it will cause a momentary loss of s...

Claims

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Application Information

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IPC IPC(8): H04B10/035H04L12/437H04B10/079H04L12/26
Inventor 韩晋孙琳沈军叶品勇吴银福
Owner NANJING DIANYAN ELECTRIC POWER AUTOMATION
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