A Redundant Channel Seamless Switching Method for Master-Substation Communication in Power System
A redundant channel and seamless switching technology, applied in transmission systems, digital transmission systems, electrical components, etc., can solve problems such as data discarding, achieve the effects of reducing the judgment process, solving data discarding, and improving anti-disturbance performance
Inactive Publication Date: 2021-04-20
NR ELECTRIC CO LTD +1
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is to overcome the defects of the prior art, provide a redundant channel seamless switching method for communication between the main and substations of the power system, solve the problems of data discarding and long channel interruption time caused by redundant channel switching, and improve Anti-disturbance Performance of Master-Substation Communication
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[0027] 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.
[0028] The redundant channel seamless switching method of the power system master-substation communication of the present invention comprises the following steps:
[0029] Step 1: The main station side initializes multiple physical links that are mutually standby according to the actual communication situation, and shares the link status flag; the corresponding sub-station side also needs to initialize multiple physical links that are mutually standby, and share the link Status flags; link status flags include link reset status, link process flags, etc.
[0030] The link state flag has different manifestations in different communication protocols.
[0031] Taking IEC101 as an example, the master and sub-stations control data transmission ...
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The invention discloses a redundant channel seamless switching method for communication between master and sub-stations in a power system, comprising: initializing physical links that are mutually standby on the side of the main station and sub-stations and sharing link status flags; performing communication protocol level on the main station side The link initialization operation of the master station and the slave station select the main channel and initialize the global link status flag; the master station side starts the application data query from the main channel link; the slave station side receives the message from the master station side and updates the global link status flag , and respond to the application data; the master station side receives the response data from the slave station side, and updates the global link status flag; when the main channel is abnormal, the master station switches the channel to the backup link and uses it to re-call the application data; the slave station side also Switch the main channel, and resend the last application data when the link flag of the detection query command is the same as last time, otherwise continue to respond to new application data. The invention can avoid problems such as data discarding, long communication interruption time and the like in the channel switching process of the main substation.
Description
technical field [0001] The invention relates to a redundant channel seamless switching method for communication between master and sub-stations in a power system, and belongs to the technical field of communication in the field of power systems. Background technique [0002] At present, the power system field has relatively high requirements for data real-time performance and security. In order to ensure the normal transmission of data, there will be multiple redundant channel links between the master station and the slave station to ensure When a problem occurs in one of the channels, it can switch to other backup channels and perform normal data transmission. [0003] The redundant channel switching scheme actually adopted at present is to use multiple independent channel links as cold standby for each other. After detecting that the communication between the main channel link between the main station and the sub-station has timed out, it is judged that the communication o...
Claims
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IPC IPC(8): H04L12/24H04L12/26
CPCH04L41/0668H04L43/0811
Inventor 杨梅强胡绍谦汤震宇尤小明曹翔宋林川王仁斌
Owner NR ELECTRIC CO LTD