Double-channel data transmission method in optical fiber longitudinal differential protection

A data transmission method and channel data technology, applied in the direction of digital transmission system, transmission system, error prevention, etc., can solve the problem that the intermittent bit error of protection data has a great impact, the quality of channel transmission data does not improve much, and the main protection of channel switching Long exit time and other issues to achieve the effect of protecting real-time

Inactive Publication Date: 2008-10-29
XUJI GRP +2
View PDF0 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above methods have the following disadvantages: First, the switching time is long. It takes a long time from the failure of the main channel to the protection using the backup channel to establish a new data connection, so the channel switching takes a long time for the main protection to exit
The second is...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Double-channel data transmission method in optical fiber longitudinal differential protection
  • Double-channel data transmission method in optical fiber longitudinal differential protection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] Describe the detailed content of the present invention in detail below:

[0027] The dual-channel data transmission method in the optical fiber longitudinal difference protection of the present invention is to set a dual-channel data selection function module between the dual-channel data communication module and the protection calculation module, and the dual-channel data selection function module is independent of the protection calculation module, To provide reliable communication data for the protection calculation module, among them, the two channels work independently and send and receive protection data at the same time, each channel has an independent channel quality monitoring function, the two channels are not divided into masters and slaves, the status is exactly the same, and they work in parallel; The two-channel data selection of the channel data selection function module has an adaptive function, which is adaptive to the single-channel and dual-channel wor...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a double-channel data transmitting method in optical fiber differential protection. The method is characterized in that: when only one channel is functioning, a protection device carries out synchronous adjustment at the time of sampling according to the data of the functioning channel; when two channels are functioning and power is on, the channel (confirmed for 3 times) with less time delay is preferably chosen as the synchronous adjustment channel; when the two channels are functioning and the time delay of the two channels only differs a little (less than 0.6ms), the channel A is chosen as the synchronous adjustment channel; when the synchronous adjustment channel is disabled, the other normal functioning channel is chosen as the synchronous adjustment channel. When the time delay of the synchronous channel is larger than the time delay of the other channel (the difference is lager than 0.3ms) and the difference continues for 10s, the other channel is chosen as the synchronous adjustment channel.

Description

technical field [0001] The invention relates to the electrical field, in particular to a method for increasing the reliability of longitudinal differential protection through dual channels in optical fiber differential protection of high-voltage power grids. Background technique [0002] Current differential protection of transmission lines needs to transmit a large amount of data information from one side of the line to the other. When a transmission error occurs, it is difficult to reconstruct the information due to the real-time protection requirements and the limitation of channel capacity. This means that if one or more bit errors occur in a frame of hundreds of bits of information, the entire frame of information will be discarded. If the frequency of error codes is not high, it will have little impact on the protection performance, but if the frequency of errors is high, the differential protection will be blocked. If there is one bit error or multiple bit errors in ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04L1/22H04B1/74
Inventor 路光辉刘军商建华封晓东贺要锋桑仲庆吴双惠
Owner XUJI GRP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap