CN114374645A - Inter-station communication data roundabout method for multiple converter stations - Google Patents
Inter-station communication data roundabout method for multiple converter stations Download PDFInfo
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- CN114374645A CN114374645A CN202011093323.1A CN202011093323A CN114374645A CN 114374645 A CN114374645 A CN 114374645A CN 202011093323 A CN202011093323 A CN 202011093323A CN 114374645 A CN114374645 A CN 114374645A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/22—Alternate routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/104—Peer-to-peer [P2P] networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
Abstract
The invention discloses an inter-station communication data roundabout method for multiple converter stations. The method does not change the hardware structure of point-to-point redundant communication and only adjusts the transmission content. The components of the communication data are defined in detail, and a combination method of the roundabout data is given. When the direct connection channel is normal, the direct connection channel data is preferentially selected; and when the direct connection channel is abnormal and the detour channel is normal, selecting detour channel data. By adopting the method and the device, the inter-station communication reliability of the multiple converter stations is greatly improved, and the realization mode is simple and economical.
Description
Technical Field
The invention relates to the technical field of direct current transmission, in particular to an inter-station communication data roundabout method for multiple converter stations.
Background
With the development of direct current transmission, more and more multi-terminal direct current transmission projects are put into operation and built successively. The coordination control function among multiple converter stations is an important function of multi-terminal direct current, and particularly has more coordination requirements among the converter stations in the conventional direct current or mixed direct current engineering containing a thyristor valve. A stable and reliable inter-station communication scheme is the basis of a multi-station coordination control function.
The design of the inter-station communication scheme has two directions: one is point-to-point redundancy and the other is networking redundancy. In the point-to-point mode, the control and protection device is in direct point-to-point communication with the control and protection devices of other stations, channels between the stations are independent and special, the transmitted data volume is small, and the communication between the station and other stations cannot be influenced by the fault of a single channel of the station. The networking mode is that channel data of each station is sent to a control and protection device after being networked at a receiving end, the data sent by the control and protection device is distributed to each station after being networked at a sending end, a ring network or a point-to-point network is formed among the stations, the transmitted data volume is large, and faults of an optical fiber or a networking switch and the like at the sending end of the station directly influence the communication between the station and other stations. After redundancy is added on the basis of the point-to-point scheme and the networking scheme, the fault of a single device does not cause the interruption of communication between stations. However, for long-distance inter-station communication, the optical fiber channel has multiple switching, and the fault risk is exponentially changed along with the switching times, so that the probability of inter-station communication interruption caused by N-2 is greatly increased. On the basis of the existing communication scheme structure, it is necessary to further research a method for improving the communication reliability.
Disclosure of Invention
The invention aims to provide an inter-station communication data roundabout method for multiple converter stations so as to improve the reliability of inter-station communication of the multiple converter stations.
In order to achieve the above purpose, the solution of the invention is: a method for roundabout communication data among stations of multiple converter stations comprises the following steps:
the stations adopt point-to-point communication;
the inter-station communication data comprises: each station channel state, each station general packet and each station to other station orientation packet;
the other stations: all stations except the station;
all other third stations: all the stations except the station and a certain station;
the communication data sent by the station to the station comprises: the channel state of the station and other stations, the general packet of the station, the directional packet of the station to other stations, the general packet of all other third stations forwarded by the station and the directional packet of all other third stations forwarded by the station to the station;
the station communication data received by the station comprises: the channel state of a certain station and other stations, a general packet of the certain station, a directional packet of the certain station to other stations, general packets of all other third stations forwarded by the certain station and directional packets from all other third stations forwarded by the certain station to the local station; the directional packet of the certain station to other stations comprises: a directional packet of a station to the station and directional packets of the station to all other third stations; the general packet of a certain station and the directional packet of the station to the station form direct communication data from the station to the station; the general packets forwarded by a certain station from all other third stations and the directional packets forwarded by a certain station from all other third stations to the local station form circuitous communication data forwarded by a certain station from all other third stations to the local station.
Further, when the direct connection channel is normal, the direct connection channel data is preferentially selected; and when the direct connection channel is abnormal and the detour channel is normal, selecting detour channel data.
Further, the scheme for the station to select the communication data of the station is as follows:
i) when the channel state from a certain station to the local station is normal, selecting direct communication data from the certain station to the local station;
ii) when the channel state from a certain station to the station is abnormal, the channel state from a third station to the station is normal and the channel state from the third station to the station is normal, selecting the roundabout communication data from the certain station to the station forwarded by the third station;
and iii) in other cases, the communication between a station and the local station is interrupted, and the communication data before interruption is kept unchanged.
Further, when more than three converter stations and a plurality of third stations forward the detour communication data are available, the detour communication data with the shortest total transmission path delay time is preferably selected.
After the scheme is adopted, the invention adds roundabout communication on the basis of point-to-point redundant communication. When the direct connection channel is normal, the direct connection channel data is preferentially selected; when the direct connection channel is abnormal and the alternative channel is normal, the alternative channel data is selected, and single station communication interruption in the N-2 process is avoided. The method does not change the hardware structure of point-to-point redundant communication and only adjusts the transmission content. The components of the communication data are defined in detail, and a combination method of the roundabout data is given. By adopting the method and the device, the inter-station communication reliability of the multiple converter stations is greatly improved, and the realization mode is simple and economical.
Drawings
FIG. 1 is a schematic diagram of a three-terminal inter-station communication hardware connection according to the present invention;
FIG. 2 is a schematic diagram of a data packet received by communication between three terminals according to the present invention;
fig. 3 is a schematic diagram illustrating a data packet composition for communication transmission between three terminals according to the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
The first embodiment of the inter-station communication data detouring method for multiple converter stations in the application comprises the following steps:
and the stations adopt point-to-point communication.
The inter-station communication data comprises: the channel state of each station, the general packet of each station and the direction packet of each station to other stations.
The other stations: all stations except the own station.
All other third stations: all stations except the own station and a certain station.
The communication data sent by the station to the station comprises: the channel state of the station and other stations, the general packet of the station, the directional packet of the station to other stations, the general packet of all other third stations forwarded by the station and the directional packet of all other third stations forwarded by the station to the station.
The station communication data received by the station comprises: the channel state of a certain station and other stations, a general packet of the certain station, a directional packet of the certain station to other stations, general packets of all other third stations forwarded by the certain station and directional packets from all other third stations forwarded by the certain station to the local station; the directional packet of the certain station to other stations comprises: a directional packet of a station to the station and directional packets of the station to all other third stations; the general packet of a certain station and the directional packet of the station to the station form direct communication data from the station to the station; the general packets forwarded by a certain station from all other third stations and the directional packets forwarded by a certain station from all other third stations to the local station form circuitous communication data forwarded by a certain station from all other third stations to the local station.
When the direct connection channel is normal, the direct connection channel data is preferentially selected; and when the direct connection channel is abnormal and the detour channel is normal, selecting detour channel data.
In a preferred embodiment, the scheme for the station to select the communication data of the station is as follows:
1. when the channel state from a certain station to the local station is normal, selecting direct communication data from the certain station to the local station;
2. when the channel state from a certain station to the station is abnormal, the channel state from a third station to the station is normal and the channel state from the third station to the station is received by the third station is normal, selecting the roundabout communication data from the certain station to the station forwarded by the third station;
3. otherwise, the communication between a station and the local station is interrupted, and the communication data before interruption is kept unchanged.
In a preferred embodiment, when selecting the detour channel data, if more than three converter stations and a plurality of third stations forward detour communication data are available, the detour communication data with the shortest total transmission path delay is preferentially selected.
Another embodiment of the communication data detouring method between stations of multiple converter stations according to the present application is described below with reference to fig. 1 to 3. Fig. 1 is a schematic diagram of inter-station communication in an embodiment of three-terminal direct current engineering, where communication between a converter station 1 and a converter station 2 is a redundant communication channel 11, communication between the converter station 2 and the converter station 3 is a redundant communication channel 12, and communication between the converter station 1 and the converter station 3 is a redundant communication channel 13. The inter-station communication data consists of channel states of all stations, general packets of all stations and directional packets of all stations to other stations.
The communication data sent by the station to the station comprises: the channel state of the station and other stations, the general packet of the station, the directional packet of the station to other stations, the general packet of all other third stations forwarded by the station and the directional packet of all other third stations forwarded by the station to the station. As shown in fig. 3, taking station 1 as an example, the data transmitted by station 1 to station 2 includes: the channel status of station 1 with other stations, station 1 general packet, station 1 to station 2 directional packet, station 1 to station 3 directional packet, station 3 general packet, station 3 to station 2 directional packet. The data transmitted by station 1 to station 3 includes: the channel status of station 1 with other stations, station 1 general packet, station 1 to station 2 directional packet, station 1 to station 3 directional packet, station 2 general packet, station 2 to station 3 directional packet.
The station communication data received by the station comprises: the channel state of a certain station and other stations, a general packet of the certain station, a directional packet of the certain station to other stations, general packets of all other third stations forwarded by the certain station and directional packets from all other third stations forwarded by the certain station to the local station; the directional packet of the certain station to other stations comprises: a directional packet of a station to the station and directional packets of the station to all other third stations; the general packet of a certain station and the directional packet of the station to the station form direct communication data from the station to the station; the general packets forwarded by a certain station from all other third stations and the directional packets forwarded by a certain station from all other third stations to the local station form circuitous communication data forwarded by a certain station from all other third stations to the local station. As shown in fig. 2, taking station 1 as an example, station 1 receives data to station 2, which includes: the channel status of station 2 with other stations, station 2 general packet, station 2 to station 1 directional packet, station 2 to station 3 directional packet, station 3 general packet, station 3 to station 1 directional packet. Wherein the station 2 general packet and the station 2 to station 1 directional packet form the direct communication data of the station 2 to the station 1. Station 3 general packet, station 3 to station 1 directional packet, constitutes station 3 to station 1 detour communication data. The selection scheme for the station to receive the communication data of a certain station is as follows:
1. when the channel state from a certain station to the local station is normal, selecting direct communication data from the certain station to the local station;
2. when the channel state from a certain station to the station is abnormal, the channel state from a third station to the station is normal and the channel state from the third station to the station is received by the third station is normal, selecting the roundabout communication data from the certain station to the station forwarded by the third station;
3. otherwise, the communication between a station and the local station is interrupted, and the communication data before interruption is kept unchanged.
After the scheme is adopted, the invention adds roundabout communication on the basis of point-to-point redundant communication. When the direct connection channel is normal, the direct connection channel data is preferentially selected; when the direct connection channel is abnormal and the alternative channel is normal, the alternative channel data is selected, and single station communication interruption in the N-2 process is avoided. The method does not change the hardware structure of point-to-point redundant communication and only adjusts the transmission content. The components of the communication data are defined in detail, and a combination method of the roundabout data is given. By adopting the method and the device, the inter-station communication reliability of the multiple converter stations is greatly improved, and the realization mode is simple and economical.
Finally, it should be noted that: the technical solutions of the present invention are only illustrated in conjunction with the above-mentioned embodiments, and not limited thereto. Those of ordinary skill in the art will understand that: modifications and equivalents may be made to the embodiments of the invention by those skilled in the art, which modifications and equivalents are within the scope of the claims appended hereto.
Claims (4)
1. An inter-station communication data roundabout method for multiple converter stations is characterized in that:
the stations adopt point-to-point communication;
the inter-station communication data comprises: each station channel state, each station general packet and each station to other station orientation packet;
the other stations: all stations except the station;
all other third stations: all the stations except the station and a certain station;
the communication data sent by the station to the station comprises: the channel state of the station and other stations, the general packet of the station, the directional packet of the station to other stations, the general packet of all other third stations forwarded by the station and the directional packet of all other third stations forwarded by the station to the station;
the station communication data received by the station comprises: the channel state of a certain station and other stations, a general packet of the certain station, a directional packet of the certain station to other stations, general packets of all other third stations forwarded by the certain station and directional packets from all other third stations forwarded by the certain station to the local station; the directional packet of the certain station to other stations comprises: a directional packet of a station to the station and directional packets of the station to all other third stations; the general packet of a certain station and the directional packet of the station to the station form direct communication data from the station to the station; the general packets forwarded by a certain station from all other third stations and the directional packets forwarded by a certain station from all other third stations to the local station form circuitous communication data forwarded by a certain station from all other third stations to the local station.
2. The method for bypassing communication data between stations of multiple converter stations according to claim 1, wherein when the direct channel is normal, the direct channel data is preferentially selected; and when the direct connection channel is abnormal and the detour channel is normal, selecting detour channel data.
3. The method for bypassing communication data between stations of multiple converter stations as claimed in claim 2, wherein the scheme selected by the station for the communication data of a certain station is as follows:
i) when the channel state from a certain station to the local station is normal, selecting direct communication data from the certain station to the local station;
ii) when the channel state from a certain station to the station is abnormal, the channel state from a third station to the station is normal and the channel state from the third station to the station is normal, selecting the roundabout communication data from the certain station to the station forwarded by the third station;
and iii) in other cases, the communication between a station and the local station is interrupted, and the communication data before interruption is kept unchanged.
4. A method for detouring communication data between stations of multiple converter stations as claimed in any one of claims 2 or 3, wherein: when more than three converter stations and a plurality of third stations transmit alternative communication data, the alternative communication data with the shortest total transmission path delay is preferentially selected.
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| CN202011093323.1A CN114374645A (en) | 2020-10-14 | 2020-10-14 | Inter-station communication data roundabout method for multiple converter stations |
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