CN107370537B - A kind of detection method of Fibre-optical Pilot Protection - Google Patents
A kind of detection method of Fibre-optical Pilot Protection Download PDFInfo
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- CN107370537B CN107370537B CN201710474063.4A CN201710474063A CN107370537B CN 107370537 B CN107370537 B CN 107370537B CN 201710474063 A CN201710474063 A CN 201710474063A CN 107370537 B CN107370537 B CN 107370537B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0793—Network aspects, e.g. central monitoring of transmission parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/03—Arrangements for fault recovery
- H04B10/032—Arrangements for fault recovery using working and protection systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07953—Monitoring or measuring OSNR, BER or Q
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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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
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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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
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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
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
- H04L1/0083—Formatting with frames or packets; Protocol or part of protocol for error control
Abstract
The invention discloses a kind of detection method of Fibre-optical Pilot Protection, from sender and recipient together with complete, the two respectively detects Fibre-optical Pilot Protection in physical layer, data link layer, application layer.The present invention has preferable detection completeness, and classification considers all kinds of channel failures, good with existing design specification compliance；Entire scheme realizes the unique identification in channel, solves the problems, such as that principal and subordinate channel cannot be distinguished in existing scheme under the premise of no increase user's definite value；The detection scheme can be automatically performed the verification of two sides protective device program version, it is ensured that the consistency of two sides program version eliminates operation risk existing for artificial check and correction version；Information coding is high-efficient, and an information word contains gap marker, 2 category information of program version simultaneously, only increases the transmission quantity of 2 bytes, the influence to protective program is minimum.
Description
Technical field
The present invention relates to relay protection detection field, especially a kind of detection method of Fibre-optical Pilot Protection.
Background technique
On high pressure, extra high voltage network, the optical fiber pilot protection of duplicate system retrofit is widely used.Optical fiber pilot protection
It is to judge fault type by comparing the characteristic quantity of two sides information by the information of optical-fibre channel exchange two sides route protection
(troubles inside the sample space, external area error), to decide whether to cut off protected circuit.As the carrier of protection information, optical fiber indulges UNPROFOR
Shield channel plays huge effect in the whole series protection, and the quality of optical-fibre channel directly affects the action behavior of protective device.
Common Fibre-optical Pilot Protection abnormal conditions have channel interrupt, channel from ring, channel intersection, data packetloss, channel step-out
Deng.Detect channel abnormal fast and reliablely, to start corresponding counter-measure as early as possible, this for enhance electric system peace
Full stable operation has great realistic meaning.
Currently, the monitoring for Fibre-optical Pilot Protection is usually realized by protective device, basic principle are as follows:
Protective device passes through real-time detection optical-fibre channel physical layer parameter (such as light sends out power, light receives power), link layer parameter (such as channel
The bit error rate), application layer message (such as two sides channel recognition code), when above-mentioned parameter be unsatisfactory for setting definite value threshold when, device
It alerts and is latched pilot protection.Above-mentioned way is able to detect most of channel abnormal, but for following problems there has been no than
More perfect solution: (1) the interconnection detection in principal and subordinate channel；(2) consistency detection of two sides protective program version.
About problem (1), common channel interconnection situation has: the interconnection (such as Fig. 1) of adjacent lines, double loop
The interconnection (such as Fig. 2) on road, the interconnection (such as Fig. 3) in principal and subordinate channel.In above-mentioned figure, correct connection side a) is indicated
Formula, b) indicate wrong connection type.For channel interconnection, general way are as follows: in protective device definite value, respectively
This side, contralateral approach set a unique identification code, judge channel by the information of identification code of real-time detection transceiver channel
Whether intersect.This scheme can be sentenced schemes single channel cross faults shown in (1), figure (2) out；But scheme principal and subordinate channel shown in (3)
Identification code is identical, because channel recognition code is configured by protective device, the corresponding identification code of a device, and the master of a device
An identification code is shared from channel, therefore principal and subordinate channel cross faults out can not be sentenced.Due to principal and subordinate channel cross faults concealment pole
By force, very big workload is increased to service personnel.
About problem (2), conventional way is that the consistency of two sides protective program version is confirmed by operations staff.It is this by
There are operation risk, scene a lot of because of operation caused by protective program version in two sides is inconsistent the way of manual intervention occurred
Accident.
Therefore, it is necessary to existing Fibre-optical Pilot Protection detection scheme be improved, to facilitate the day of optical fiber pilot protection
Chang Yunwei, field failure maintenance.
Summary of the invention
Technical problem to be solved by the present invention lies in, a kind of detection method of Fibre-optical Pilot Protection is provided, it can
It solves the problems, such as that existing scheme can not detect principal and subordinate channel intersection, eliminates the operation wind that manual confirmation program version may cause
Danger.
In order to solve the above technical problems, the present invention provides a kind of detection method of Fibre-optical Pilot Protection, including as follows
Step:
(1) sender and recipient respectively correspond two sides protective device, this side protective device is using CRC-16 algorithm to dress
It sets application program and carries out sum check, generate 16 program ver-ify information；
(2) according to this wing passage identification code definite value in protective device, 16 identification codes for representing this wing passage are generated；
(3) unique 32 bit port letter is generated in conjunction with program ver-ify information and this wing passage identification code according to channel type
Cease word；
(4) it sends information word and detection light sends out power, light sends out power real-time display in the case where device monitors menu；
(5) opposite side protective device judges whether received optical power meets the requirements, when optical fiber transport channel interruption or channel decline
When consuming exceeded, opposite side protective device report " channel interrupt " or " communication channel delay is excessive " is latched pilot protection at this time；When light-receiving function
Rate in the normal range when, starting in next step detect；
(6) opposite side protective device judges communication bit error rates and effectiveness of information: when reception information frame number and sending information frame
It when number difference is more than setting threshold or mismatches for information checking code continuous 5 times, is judged to " channel step-out ", is latched vertical UNPROFOR
Shield；When above situation is unsatisfactory for, it is normal to be judged to data link layer, and starting detects in next step；
(7) opposite side protective device parses the information word received, extracts contralateral approach identification code, opposite side program version respectively
This information；
(8) opposite side protective device judges whether contralateral approach identification code is fixed with " the contralateral approach identification code " in protective device
Value matching；When channel intersects from ring or single channel, above-mentioned 2 identification codes are mismatched；When channel is normal, above-mentioned identification code
Match, starting detects in next step；When channel is normal, above-mentioned identification code matching, starting detects in next step；
(9) judge whether opposite side program version and this side program version are consistent, wherein this side program version check information has been
It is calculated via step (1)；When two sides check information is inconsistent, it is inconsistent to be judged to two sides program, is latched pilot protection；Instead
It, it is consistent to be judged to program version, open pilot protection.
Preferably, in step (1), CRC-16 algorithm specifically comprises the following steps: to read this side protective device program curing,
It is deposited in an array, the byte number ProgSize of logging program, according to generator polynomial g (x)=x16+x12+x2+1
The generation of CRC code is carried out to the byte in the array one by one；In order to improve the formation speed of CRC code, at look-up table
Reason, concrete processing procedure are as follows: (1) preset one 16 crc values, initial value 0x0；(2) n-th in array is extracted
The value range of byte, N is 1~ProgSize, the least-significant byte exclusive or of the byte and CRC is obtained an index value, and according to this
Index value finds corresponding crc value in CRC-16 table；(3) most-significant byte for retaining step (2) value is constant, by its least-significant byte and initial value
Most-significant byte exclusive or as new least-significant byte value, combine most-significant byte, least-significant byte obtains a 16 new place values, and executes N=N+1；Weight
The verification of process (2), (3) up to completing all procedure bytes is executed again, may finally obtain the CRC check value of this side program.
Preferably, in step (3), channel information word is generated using following rule: under single, information word is high by 16
Position is this wing passage identification code, and low 16 are this side program ver-ify code；Under principal and subordinate's channel pattern, main channel information word is 16 high
For this wing passage identification code, low 16 are this side program ver-ify code, be high 16 from channel information word are this wing passage identification code,
Low 16 radix-minus-one complements for this side program ver-ify code.
Preferably, in step (9), when complement code characteristic each other occurs in two sides check information, illustrate principal and subordinate channel occurred
Cross-connect faults, it is consistent that this also demonstrates two sides program version simultaneously.
Preferably, step (4) and step (5) are carried out in physical layer；Step (6) is carried out in data link layer；Other steps
All carried out in application layer.
The invention has the benefit that have preferable detection completeness, classification consider physical layer, data link layer,
All kinds of channel failures of application layer are good with existing design specification compliance；Entire scheme is in no premise for increasing user's definite value
Under, the unique identification in channel is realized, solves the problems, such as that principal and subordinate channel cannot be distinguished in existing scheme；The detection scheme can be with
It is automatically performed the verification of two sides protective device program version, it is ensured that the consistency of two sides program version eliminates artificial check and correction version
Operation risk existing for this；Information coding is high-efficient, and an information word contains gap marker, 2 category information of program version simultaneously,
The transmission quantity of 2 bytes is only increased, the influence to protective program is minimum.
Detailed description of the invention
Fig. 1 is the Fibre-optical Pilot Protection interconnection schematic diagram of adjacent lines of the invention.
Fig. 2 is the Fibre-optical Pilot Protection interconnection schematic diagram of double-circuit line of the invention.
Fig. 3 is optical fiber pilot protection principal and subordinate channel interconnection schematic diagram of the invention.
Fig. 4 is method flow schematic diagram of the invention.
Specific embodiment
As shown in figure 4, a kind of detection method of Fibre-optical Pilot Protection, includes the following steps:
(1) sender and recipient respectively correspond two sides protective device, this side protective device is using CRC-16 algorithm to dress
It sets application program and carries out sum check, generate 16 program ver-ify information；
(2) according to this wing passage identification code definite value in protective device, 16 identification codes for representing this wing passage are generated；
(3) unique 32 bit port letter is generated in conjunction with program ver-ify information and this wing passage identification code according to channel type
Cease word；
(4) it sends information word and detection light sends out power, light sends out power real-time display in the case where device monitors menu；
(5) opposite side protective device judges whether received optical power meets the requirements, when optical fiber transport channel interruption or channel decline
When consuming exceeded, opposite side protective device report " channel interrupt " or " communication channel delay is excessive " is latched pilot protection at this time；When light-receiving function
Rate in the normal range when, starting in next step detect；
(6) opposite side protective device judges communication bit error rates and effectiveness of information: when reception information frame number and sending information frame
It when number difference is more than setting threshold or mismatches for information checking code continuous 5 times, is judged to " channel step-out ", is latched vertical UNPROFOR
Shield；When above situation is unsatisfactory for, it is normal to be judged to data link layer, and starting detects in next step；
(7) opposite side protective device parses the information word received, extracts contralateral approach identification code, opposite side program version respectively
This information；
(8) opposite side protective device judges whether contralateral approach identification code is fixed with " the contralateral approach identification code " in protective device
Value matching；When channel intersects from ring or single channel, above-mentioned 2 identification codes are mismatched；When channel is normal, above-mentioned identification code
Match, starting detects in next step；
(9) judge whether opposite side program version and this side program version are consistent, wherein this side program version check information has been
It is calculated via step (1)；When two sides check information is inconsistent, it is inconsistent to be judged to two sides program, is latched pilot protection；Instead
It, it is consistent to be judged to program version, open pilot protection.
Currently, associate power company has formulated the standardized designs specification of protective device, protective device function is unified, has determined
The user interfaces such as value, menu.For compatibility standard design specification, while the optical-fibre channel detection etc. that protective device can be enhanced again
Performance respectively detects channel physical layer, data link layer, application layer using the thinking of layered weighting.As long as above-mentioned
There is channel abnormal in one layer of meaning, and protective device provides related warning information, and Latching Fiber pilot protection.Pass through one letter of setting
Word (word length is 32) is ceased, uniquely to identify all kinds of optical-fibre channels.Comprehensively consider the configuring condition in field optical fibers channel,
The composition of information word does following regulation: the information word of single are as follows: high 16 are this wing passage identification code, and low 16 are this
Side program ver-ify code；Under principal and subordinate's channel pattern, main channel information word are as follows: high 16 are this wing passage identification code, and low 16 are this
Side program ver-ify code；From channel information word are as follows: high 16 this wing passage identification codes, low 16 are the anti-of this side program ver-ify code
Code.
Air conduct measurement, version verification are realized by the way of exchanging information word.This side protective device is protected by extracting opposite side
The information word (channel recognition code, program ver-ify code) of protection unit transmitting, respectively with contralateral approach identification code definite value inside device, this
Side program ver-ify code is compared, to obtain current passage connection state, program version consensus information.It is tied according to judgement
Fruit, protective device start subsequent processing routine.
Entire detection process from sender and recipient together with complete, the two respectively physical layer, data link layer,
Application layer detects Fibre-optical Pilot Protection.Sender, recipient respectively correspond two sides protective device.Any side is protected
Protection unit all experienced transmission, receive 2 processes, this side protective device needs to send information to opposite side protective device, simultaneously
It is also required to receive the information of opposite side protective device transmitting.
The compatible existing Technology design specification of above-mentioned detection scheme can be complete by two sides protective device interactive information word
Various Fibre-optical Pilot Protection failures are detected standbyly, while consistency school can be carried out to two sides protective program version automatically
It tests, improves detection efficiency, eliminate operation risk existing for artificial check and correction program version, have stronger engineering practicability.
Although the present invention is illustrated and has been described with regard to preferred embodiment, it is understood by those skilled in the art that
Without departing from scope defined by the claims of the present invention, variations and modifications can be carried out to the present invention.
Claims (4)
1. a kind of detection method of Fibre-optical Pilot Protection, which comprises the steps of:
(1) sender and recipient respectively correspond two sides protective device, this side protective device answers device using CRC-16 algorithm
Sum check is carried out with program, generates 16 program ver-ify information；CRC-16 algorithm specifically comprises the following steps: to read this side guarantor
Protection unit program curing is deposited in an array, the byte number ProgSize of logging program, according to generator polynomial g
(x)=x16+x12+x2+ 1 carries out the generation of CRC code to the byte in the array one by one；In order to improve the formation speed of CRC code, adopt
It is handled with look-up table, concrete processing procedure is as follows: (21) preset one 16 crc value, initial value 0x0；(22)
The nth byte in array is extracted, the value range of N is 1~ProgSize, and the least-significant byte exclusive or of the byte and CRC are obtained one
A index value, and corresponding crc value is found in CRC-16 table according to the index value；(23) retain the most-significant byte of step (22) value
It is constant, using the most-significant byte exclusive or of its least-significant byte and initial value as new least-significant byte value, combine most-significant byte, least-significant byte obtains new 16
Place value, and execute N=N+1；The verification of process (22), (23) up to completing all procedure bytes is repeated, may finally be obtained
To the CRC check value of this side program；
(2) according to this wing passage identification code definite value in protective device, 16 identification codes for representing this wing passage are generated；
(3) unique 32 bit port information is generated in conjunction with program ver-ify information and this wing passage identification code according to channel type
Word；
(4) it sends information word and detection light sends out power, light sends out power real-time display in the case where device monitors menu；
(5) opposite side protective device judges whether received optical power meets the requirements, when optical fiber transport channel interruption or channel attenuation are super
When mark, opposite side protective device report " channel interrupt " or " communication channel delay is excessive " is latched pilot protection at this time；When light receiving power exists
When in normal range (NR), starting detects in next step；
(6) opposite side protective device judges communication bit error rates and effectiveness of information: when reception information frame number and transmission information frame number are poor
It when value is more than setting threshold or mismatches for information checking code continuous 5 times, is judged to " channel step-out ", is latched pilot protection；When
When above situation is unsatisfactory for, it is normal to be judged to data link layer, and starting detects in next step；
(7) opposite side protective device parses the information word received, extracts contralateral approach identification code, opposite side program version letter respectively
Breath；
(8) opposite side protective device judge contralateral approach identification code whether with " contralateral approach identification code " definite value in protective device
Match；When channel intersects from ring or single channel, above-mentioned 2 identification codes are mismatched；When channel is normal, above-mentioned identification code matching,
Starting detects in next step；
(9) judge whether opposite side program version and this side program version consistent, wherein this side program version check information via
Step (1) is calculated；When two sides check information is inconsistent, it is inconsistent to be judged to two sides program, is latched pilot protection；Conversely,
It is consistent to be judged to program version, open pilot protection.
2. the detection method of Fibre-optical Pilot Protection as described in claim 1, which is characterized in that in step (3), channel letter
Cease word to generate using following rule: under single, it is this wing passage identification code that information word, which is high 16, and low 16 are this side
Program ver-ify code；Under principal and subordinate's channel pattern, it is this wing passage identification code that main channel information word, which is high 16, and low 16 are this side journey
It is this wing passage identification code that sequence check code, which is high 16 from channel information word, low 16 radix-minus-one complements for this side program ver-ify code.
3. the detection method of Fibre-optical Pilot Protection as described in claim 1, which is characterized in that in step (9), work as two sides
When complement code characteristic each other occurs in check information, illustrate principal and subordinate channel cross-connect faults occurred, this also demonstrates two sides simultaneously
Program version is consistent.
4. the detection method of Fibre-optical Pilot Protection as described in claim 1, which is characterized in that step (4) and step (5)
It is carried out in physical layer；Step (6) is carried out in data link layer；Other steps are all carried out in application layer.
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| CN108565841B (en) * | 2018-04-27 | 2020-01-14 | 许继集团有限公司 | Operation control method and protection system for on-site protection submachine |
| CN111277327B (en) * | 2020-01-21 | 2021-10-01 | 国网四川省电力公司 | Line protection communication channel fault area identification method |
| CN111668801A (en) * | 2020-05-12 | 2020-09-15 | 国网四川省电力公司 | Backup protection coordination method and protection system based on channel fault classification |
| CN112188420B (en) * | 2020-09-28 | 2022-03-11 | 南京国电南自电网自动化有限公司 | Method and system for identifying fault section of optical fiber multiplexing channel by using short message |
| CN112104423A (en) * | 2020-09-28 | 2020-12-18 | 南京国电南自电网自动化有限公司 | Multiplexing device and method capable of displaying state of optical fiber multiplexing channel |
| CN113391098B (en) * | 2021-06-15 | 2023-04-07 | 贵州电网有限责任公司 | Optical difference protection coaxial cable channel control device and control method thereof |
| CN113656666B (en) * | 2021-08-16 | 2023-04-07 | 国家电网有限公司西北分部 | Relay protection fixed value data interaction method |
| CN215990801U (en) * | 2021-09-26 | 2022-03-08 | 华能潍坊风力发电有限公司 | Automatic monitoring and switching device for circuit optical fiber longitudinal protection channel |
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