CN108964984A - A kind of redundant channel seamless handover method of electric system boss station communication - Google Patents
A kind of redundant channel seamless handover method of electric system boss station communication Download PDFInfo
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- CN108964984A CN108964984A CN201810605702.0A CN201810605702A CN108964984A CN 108964984 A CN108964984 A CN 108964984A CN 201810605702 A CN201810605702 A CN 201810605702A CN 108964984 A CN108964984 A CN 108964984A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0668—Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
- H04L43/0811—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking connectivity
Abstract
The invention discloses a kind of redundant channel seamless handover methods of electric system boss station communication, comprising: the physical link and shared link Status Flag of main website side and substation side initialization mutual backup；Main website side carries out the link initialization operation of communications protocol level, and main website and substation choose main channel and initialize global link Status Flag；Main website side is from main channel link startup application data query；Substation, which flanks, receives main website side message, updates global link Status Flag, and response application data；Main website flanks the response data for receiving substation side, updates global link Status Flag；When main channel occurs abnormal, channel is switched to reserve link by main website, and applies data with calling again；Substation side equally switches main channel, and the application data of last time are retransmitted when the Link Flags for detecting querying command are identical as last time, otherwise proceed to respond to new opplication data.The present invention can to avoid boss stand channel handoff procedure in occur data abandon, the communicating interrupt time is long the problems such as.
Description
Technical field
The present invention relates to a kind of redundant channel seamless handover methods of electric system boss station communication, belong to power train commander
Domain communication technique field.
Background technique
Currently, field of power system has relatively high requirement to real-time property, safety, in order to guarantee data just
Often transmission, can have the redundant channel link of multiple mutual backup between main website and substation, to guarantee a channel wherein
When something goes wrong, other alternate channels can be switched to and carry out normal data transmission.
The redundant channel handover scheme that actually uses at present is by multiple independent channel links cold standby each other, even
It is judged to main channel communicating interrupt after continuous repeated detection to main website and substation main channel link communication time-out, hereafter switches main channel
To reserve link, and re-start link initialization operation and calling data.Since each link is mutually only in communication process
It is vertical, thus switching channel will appear the problems such as data abandon, the communicating interrupt time is long, generate to normal communication process bigger
Disturbance.
Therefore, it is badly in need of a kind of redundant channel seamless Handoff Scheme of suitable power system boss station communication, to avoid channel
Occurs the problems such as data abandon, the communicating interrupt time is long in handoff procedure.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies of existing technologies, it is logical to provide a kind of electric system boss station
The problems such as redundant channel seamless handover method of news solves data caused by redundant channel switches and abandons, and the channel interrupt time is long,
Improve the performance of noiseproof of boss station communication.
In order to achieve the above objectives, The technical solution adopted by the invention is as follows:
A kind of redundant channel seamless Handoff Scheme of electric system boss station communication, comprising the following steps:
1) physical link of main website lateral root factually border communication condition initialization mutual backup, and shared link Status Flag；Relatively
Substation side is answered to be also required to the physical link of initialization mutual backup, and shared link Status Flag；
2) main website side carries out the link initialization operation of communications protocol level, and order is handed down to substation side by defaulting link, this
Afterwards by this default link as main channel；
3) substation, which is flanked, is operated and is confirmed by the protocol layer link initialization of main website side, by the link of main website side transmitting order to lower levels
As main channel, global link Status Flag is initialized, and clears up and carries out the preparation that data are applied in processing using data buffer storage；
4) main website flank receive substation side response after, initialize global link Status Flag；
5) main website side is from main channel link startup application data query；
6) substation, which flanks, receives the message that data query is applied in main website side, updates global link Status Flag, and organizations data
From main channel, link is responded；
7) main website flanks the application data for receiving the response of substation side, updates global link Status Flag, inquiry next time substation side application
When data, query message is issued according to the global link Status Flag of update；
8) when main website side main channel link inquires data time-out, channel is switched to reserve link by main website side, and with currently
Global link Status Flag is called again using data；
9) substation, which flanks, receives inquiry using after data command, and cut-in stand-by link is main channel, when inquiry life is detected in substation side
When the global link Status Flag of order is identical as upper subcommand, the application data of last time are retransmitted, new application is otherwise proceeded to respond to
Data.
In step 1) above-mentioned, the physical link of main website side and the initialization of substation side is two or more.
In step 1) above-mentioned, the physical link of main website side and the initialization of substation side is serial ports link or network connection.
In step 1) above-mentioned, the link state mark includes link reset state and link process mark, according to not
Link state mark is arranged in same communications protocol.
Link state mark above-mentioned is that agreement is defaulted or confirmed by the negotiation of boss station both sides.
In step 6) above-mentioned, the application data are in each link sharing in substation side.
Boss above-mentioned stands the redundant channel seamless switching communicated suitable for IEC101 specification, IEC103 specification and DNP3 rule
About.
The beneficial effects obtained by the present invention are as follows are as follows:
The deterministic process that channel interrupt can be effectively reduced using the present invention reinitializes the mistake of link after avoiding channel from switching
The problems such as journey abandons to can effectively solve data caused by channel switches, and the channel interrupt time is long, improves the communication of boss station
Performance of noiseproof.
Detailed description of the invention
Fig. 1 is existing redundant channel handover scheme flow diagram.
Fig. 2 is redundant channel switching method flow chart of the invention.
Specific embodiment
The invention will be further described below.Following embodiment is only used for clearly illustrating technical side of the invention
Case, and not intended to limit the protection scope of the present invention.
The redundant channel seamless handover method of electric system boss station communication of the invention, includes the following steps:
Step 1: factually border communication condition initializes the physical links of multiple mutual backup, and shared link state mark to main website lateral root
Will；Corresponding substation side is also required to initialize the physical link of multiple mutual backup, and shared link Status Flag；Link state
Mark includes link reset state, link process mark etc..
Link state mark has the different forms of expression in different communications protocol.
By taking IEC101 as an example, boss station be by the continuous overturning of main website query message FCB (become 1 by 0, by 1 become 0) Lai
Control data transmission.That is: the FCB overturning of main website downward message represents main website and receives and confirmed substation to the sound of last time calling
It answers, otherwise main website does not receive the response message of substation, will continue to inquire data to substation again with identical FCB；For son
For standing, indicate that main website is recognized last response and can carry out this with new data when receiving main website query message FCB overturning
Secondary response, the FCB for otherwise receiving message are not overturn, and are indicated that main website does not receive message or do not approve, are needed to retransmit one
Secondary response message.Thus, boss station needs independently to record the state of FCB, belongs to link process mark.When link is in just
When beginning or occurring abnormal, the link process mark stood by the link reset operation of protocol level to boss is needed to carry out same
Step, i.e. link reset state, when link is initial or occurs abnormal, link is non-reset state.Link process mark and link
Reset state constitutes link state mark together.
The setting of link process mark can be defaulted with agreement, and the negotiation for the both sides that can also be stood by boss confirms.
Step 2: main website side carries out the link initialization operation of communications protocol level, and order is handed down to son by defaulting link
It stands, hereafter by this default link as main channel.
Step 3: substation, which is flanked, to be operated and is confirmed by the protocol layer link initialization of main website, by main website transmitting order to lower levels
Link initializes global link Status Flag, that is, the Status Flag of all links as main channel, and carries out processing application
Data buffer storage is applied in the preparation of data, i.e. cleaning, can respond the application data of main website inquiry substation.
Step 4: main website flank receive substation response after, initialize global link Status Flag.
Step 5: main website side is from main channel link startup application data query.
Step 6: substation, which flanks, receives main website side message, updates global link Status Flag, and organizations data are led to from main
Road link is responded；Using data in each link sharing in substation side in the present invention, using data after avoiding channel from switching
It loses, guarantees the continuity using data transmission.
Renewal process is by taking IEC101 specification as an example, after substation receives the querying command of main website, can with the FCB that locally saves into
Row compares, and thinks if FCB is overturn compared with upper subcommand effectively if this subcommand, and save new FCB state.
Step 7: main website flanks the application data for receiving the response of substation side, updates global link Status Flag, inquiry next time
Stand side data when, query message is issued according to the global link Status Flag of update.
Renewal process are as follows: by taking IEC101 specification as an example, after main website receives the response data of substation, will be updated local FCB
State, next time can issue query message according to FCB state when inquiring substation data.
Comparison and the prior art, what the present invention updated is global link Status Flag, i.e., the Status Flag of all links,
It shares link state mark in the link being mutually redundant, guarantees still maintain to switch after channel is switched to reserve link
Preceding link communication state reaches the smooth transition of link state after switching.And it is updated in existing redundant channel handover scheme
Be only A link in single link i.e. Fig. 1 Status Flag, referring to (3)-step (8) the step of Fig. 1.
Step 8: when main website side main channel link inquiry data time-out, as substation side does not receive the inquiry report that main website side issues
Text or main website side do not receive the response of substation side, then channel is switched to reserve link by main website side, and with current global link
Status Flag is called again using data.
By taking IEC101 specification as an example, main website calling is using the information in the message of data including FCB, and each FCB state is more
It can be embodied in query message next time after new.
Comparison and the prior art, the present invention carry out being directly switch into reserve link when link switching is abnormal, and existing
Scheme needs the multiple query timeout of main website, just judges link A communicating interrupt, is switched to link B, referring to (12) the step of Fig. 1.
Step 9: substation, which flanks, receives inquiry using after data command, and cut-in stand-by link is main channel, when substation is detected
When the global link Status Flag of querying command is identical as upper subcommand, the application data of last time are retransmitted, are otherwise proceeded to respond to new
Application data.
Comparison and the prior art can be called directly using data after link switching of the present invention, and existing link switching side
Case needs to re-start after link switching protocol layer link initialization and the initialization of link state mark, the step of referring to Fig. 1
(13) ~ (15).
Further, the present invention in step 1 physical link either serial ports link, is also possible to be connected to the network.
The redundant channel handover scheme of main website and substation of the invention is suitable for IEC101 specification, IEC103 specification, DNP3
Specification etc. has the communications protocol of retransmission mechanism.
By taking the link of two mutual backup of Fig. 2 as an example, the present invention is described in detail, includes the following steps:
Step 1: main website side initializes link A and link B, and shared link Status Flag in physical layer；Corresponding substation side exists
Physical layer initializes link A and link B, and shared link Status Flag；
Step 2: main website side carries out the link initialization operation of communications protocol level, and order is handed down to substation by link A, by chain
Road A is as main channel；
Step 3: substation, which is flanked, to be operated and is confirmed by the link initialization of main website, by corresponding link A as main channel, just
Beginningization global link Status Flag, and carry out the preparation that data are applied in processing；
Step 4: main website, which flanks, receives substation response, initializes global link Status Flag；
Step 5: applying data query from link A starting in main website side；
Step 6: substation, which flanks, receives main website side message, updates global link Status Flag, and organizations data are carried out from link A
Response, this is shared for substation sidelinks B using data；
Step 7: main website flanks the response data for receiving substation side, updates global link Status Flag；
Step 8: when link A occurs that substation does not receive order or when main website does not receive response, it is super that main website sidelinks A inquires data
When, channel is switched to link B by main website, and data are applied in inquiry again；
Step 9: after substation sidelinks B receives inquiry data command, handoff links B is main channel；When inquiry life is detected in substation
The application data that last time is retransmitted when the Link Flags of order are identical as upper subcommand, otherwise proceed to respond to new opplication data.
The embodiment is merely illustrative of the invention's technical idea, when being related to multiple link channels, channel switch instances
It is consistent with this.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (7)
- The redundant channel seamless handover method of communication 1. a kind of electric system boss stands, which comprises the following steps:1) physical link of main website lateral root factually border communication condition initialization mutual backup, and shared link Status Flag；Relatively Substation side is answered to be also required to the physical link of initialization mutual backup, and shared link Status Flag；2) main website side carries out the link initialization operation of communications protocol level, and order is handed down to substation side by defaulting link, this Afterwards by this default link as main channel；3) substation, which is flanked, is operated and is confirmed by the protocol layer link initialization of main website side, by the link of main website side transmitting order to lower levels As main channel, global link Status Flag is initialized, and clears up and carries out the preparation that data are applied in processing using data buffer storage；4) main website flank receive substation side response after, initialize global link Status Flag；5) main website side is from main channel link startup application data query；6) substation, which flanks, receives the message that data query is applied in main website side, updates global link Status Flag, and organizations data From main channel, link is responded；7) main website flanks the application data for receiving the response of substation side, updates global link Status Flag, inquiry next time substation side application When data, query message is issued according to the global link Status Flag of update；8) when main website side main channel link inquires data time-out, channel is switched to reserve link by main website side, and with currently Global link Status Flag is called again using data；9) substation, which flanks, receives inquiry using after data command, and cut-in stand-by link is main channel, when inquiry life is detected in substation side When the global link Status Flag of order is identical as upper subcommand, the application data of last time are retransmitted, new application is otherwise proceeded to respond to Data.
- The redundant channel seamless handover method of communication 2. a kind of electric system boss according to claim 1 stands, feature It is, in the step 1), the physical link of main website side and the initialization of substation side is two or more.
- The redundant channel seamless handover method of communication 3. a kind of electric system boss according to claim 1 stands, feature It is, in the step 1), the physical link of main website side and the initialization of substation side is serial ports link or network connection.
- The redundant channel seamless handover method of communication 4. a kind of electric system boss according to claim 1 stands, feature It is, in the step 1), the link state mark includes link reset state and link process mark, is led to according to different It interrogates agreement and link state mark is set.
- The redundant channel seamless handover method of communication 5. a kind of electric system boss according to claim 4 stands, feature It is, the link state mark is that agreement is defaulted or confirmed by the negotiation of boss station both sides.
- The redundant channel seamless handover method of communication 6. a kind of electric system boss according to claim 1 stands, feature It is, in the step 6), the application data are in each link sharing in substation side.
- The redundant channel seamless handover method of communication 7. a kind of electric system boss according to claim 1 stands, feature It is, the boss stands the redundant channel seamless switching communicated suitable for IEC101 specification, IEC103 specification and DNP3 specification.
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| CN201810605702.0A CN108964984B (en) | 2018-06-13 | 2018-06-13 | Seamless switching method for redundant channel of power system main station and sub station communication |
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| CN201810605702.0A CN108964984B (en) | 2018-06-13 | 2018-06-13 | Seamless switching method for redundant channel of power system main station and sub station communication |
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Cited By (2)
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| CN116366496A (en) * | 2023-05-26 | 2023-06-30 | 广东宏大欣电子科技有限公司 | 104 protocol data receiving processing uploading method and system |
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