CN114221695B - Electric power spanning optical cable line full-coverage detection system and method - Google Patents
Electric power spanning optical cable line full-coverage detection system and method Download PDFInfo
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- CN114221695B CN114221695B CN202111525000.XA CN202111525000A CN114221695B CN 114221695 B CN114221695 B CN 114221695B CN 202111525000 A CN202111525000 A CN 202111525000A CN 114221695 B CN114221695 B CN 114221695B
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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
- H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
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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
- H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
- H04B10/0771—Fault location on the transmission path
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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
- H04B10/0791—Fault location on the transmission path
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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
- H04B10/07955—Monitoring or measuring power
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
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Abstract
The detection system comprises a main device and a slave device, wherein the main device is arranged on the tower side of a main rod of the crossing power optical cable line, and the slave device is arranged on the tower side of the crossing rod of the crossing power optical cable line; the method and the device can simultaneously detect all optical fiber cores of the electric power crossing optical cable line on line, and do not influence the normal communication of the electric power crossing optical cable line and independently occupy the optical fiber cores of the optical cable; the full-coverage detection and fault accurate positioning of each optical fiber core of the electric power crossing optical cable line are realized, the operation adaptability of the detection system is improved, the stable operation of the electric power crossing optical cable line is ensured, and the detection requirement is met.
Description
Technical Field
The invention relates to the field of optical fiber communication of power systems, in particular to a system and a method for detecting full coverage of an electric power crossing optical cable line.
Background
The electric power crossing optical cable line has complex laying environment, crossing rivers, railways and other geographic barriers, and is inconvenient for line inspection, so that the operation, maintenance and overhaul of the electric power crossing optical cable line are difficult. Once the electric power crosses the optical cable line and breaks down, because of crossing the obstacle and be not convenient for maintenance, cause the communication to break and increase, seriously influence electric power system safety operation, cause economic loss for the electric power enterprise. The existing detection mode can not realize high-reliability on-line detection of all fiber cores of a one-time covered line under the condition of ensuring normal communication; in an optical cable line online monitoring mode based on optical power, only fault warning of line access fiber cores can be provided, detection cannot be provided, and manual detection is needed; in the optical cable line detection method based on the Optical Time Domain Reflectometer (OTDR), because a standby fiber core is detected and a detection distance range has a lower limit threshold, a short-distance electric power crossing optical cable line working fiber core cannot be detected and faults can not be positioned, and the operation and maintenance requirements of crossing an electric power optical cable network cannot be met. Therefore, the prior art is difficult to meet the detection requirement of crossing the power optical cable network line.
Therefore, the electric power crossing optical cable line full-coverage detection needs to be carried out on-line detection on the electric power crossing optical cable line, normal line communication is guaranteed, all optical fiber cores of the electric power crossing optical cable line are subjected to full-coverage on-line detection, the detection is not limited by the number of empty optical fiber cores of the line, meanwhile, accurate calculation of a line fault point detection result is improved, fault fiber cores are automatically cut off, communication is recovered, the number of power supply equipment is reduced, and the intelligent degree and reliability of optical cable line detection are improved.
Disclosure of Invention
The invention aims to solve the problems that the detection of the fiber core can be realized only by monopolizing one fiber core for one optical cable line in the existing optical cable line detection mode based on OTDR, the fiber core communication resources of the line are wasted, and the full-coverage detection and fiber core level fault location of the short-distance optical cable line cannot be carried out; the optical power-based optical cable line online detection mode can only provide optical fiber core optical path online monitoring and fault warning of the optical cable line, but needs manual fault detection; the existing detection mode cannot be used for the problems of realizing full-coverage detection of an optical fiber core of an electric power crossing optical cable line and the like, and provides a system and a method for full-coverage detection of the electric power crossing optical cable line.
The power spanning optical cable line full-coverage detection system realizes the simultaneous on-line detection of the full coverage of all optical fiber cores in the optical cable line under the communication condition of all the optical fiber cores in the power spanning optical cable line;
the detection system comprises a master device and a slave device, wherein the master device is installed on the side of a main pole tower spanning the power cable line, and the slave device is installed on the side of a spanning pole tower spanning the power cable line;
the main equipment comprises N main units, and a control processor, a light source, an OTDR, a first optical switch, a second optical switch, a third optical switch, a fourth optical switch, an optical power meter and an optical attenuator which are shared by the N main units; and a 2 × 2 optical switch disposed between adjacent main cells;
the slave device comprises N slave units;
each master unit includes a master wavelength division multiplexer and a master demultiplexer; each slave unit comprises a slave wavelength division multiplexer and a slave demultiplexer;
the N main units and the N auxiliary units jointly complete simultaneous on-line detection and automatic fault detection of N pairs of optical fiber light-emitting optical paths and light-receiving optical paths correspondingly spanning the power optical cable line;
the control processor controls the first optical switch and the second optical switch to realize that the light source is sequentially connected with the first optical switch, the second optical switch and the multiplexing port of the main wavelength division multiplexer of the main unit 1, and is connected with the light inlet port of the slave demultiplexer of the slave unit 1 through the light outlet port of the main wavelength division multiplexer and a cross-over power optical cable circuit;
the demultiplexing port of the slave demultiplexer is connected with the multiplexing port of the slave wavelength division multiplexer, the light outlet port of the slave wavelength division multiplexer is connected with the light inlet port of the master demultiplexer of the master unit 1 through the power spanning optical cable line, the demultiplexing port of the master demultiplexer is connected to the multiplexing port of the master wavelength division multiplexer of the master unit 2 through a 2 × 2 optical switch, and so on, so as to realize the sequential connection of the master unit 1 to the master unit N, and the demultiplexing port of the master demultiplexer of the master unit N is sequentially connected with a third optical switch, a fourth optical switch and an optical power meter by controlling the third optical switch and a fourth optical switch; the full-coverage on-line detection of N pairs of optical paths in a crossing power optical cable line under the communication condition is realized;
in the online detection process, the control processor circularly reads the optical power value of the optical power meter, and when the read optical power value is lower than a set threshold, the control processor controls the first optical switch to realize that the OTDR is sequentially connected with the first optical switch, the second optical switch and a multiplexing port of a main wavelength division multiplexer in the main unit 1;
the demultiplexing port of the main demultiplexer of the main unit N is sequentially connected with a third optical switch, a fourth optical switch and an optical attenuator by controlling the fourth optical switch, so that full-coverage automatic fault detection of an optical path under a communication condition across the power optical cable line N is realized; and uploading the automatic fault detection result to the server.
The full-coverage detection method for the electric power crossing optical cable line is realized by the following steps:
step one, the control processor controls the first optical switch and the second optical switch to realize that a light source optical interface is sequentially connected with the first optical switch, the second optical switch and a multiplexing port of a main wavelength division multiplexer of the main unit 1, and is connected with a light inlet port of a slave demultiplexer of the slave unit 1 through a crossing power optical cable line through a light outlet port of the main wavelength division multiplexer;
the demultiplexing port of the slave demultiplexer is connected with the multiplexing port of the slave wavelength division multiplexer, the light outlet port of the slave wavelength division multiplexer is connected with the light inlet port of the master demultiplexer of the master unit 1 through the crossing power optical cable line, the demultiplexing port of the master demultiplexer is connected with the multiplexing port of the master wavelength division multiplexer of the master unit 2 through a 2 x 2 optical switch, and so on, so that the master unit 1 to the master unit N are sequentially connected, and the demultiplexing port of the master demultiplexer of the master unit N is sequentially connected with a third optical switch, a fourth optical switch and an optical power meter by controlling the third optical switch and a fourth optical switch, so that the full-coverage online detection of an optical path in the crossing power optical cable line under the communication condition is realized;
step two, in the online detection process, the control processor circularly reads the optical power value of the optical power meter, and when the read optical power value is lower than a set threshold, the control processor controls the first optical switch to realize that the OTDR optical interface is sequentially connected with the first optical switch, the second optical switch and a multiplexing port of a main wavelength division multiplexer in the main unit 1;
the demultiplexing port of the main demultiplexer of the main unit N is sequentially connected with a third optical switch, a fourth optical switch and an optical attenuator by controlling the fourth optical switch, so that full-coverage automatic fault detection of a light-emitting optical path and a light-receiving optical path under a communication condition by crossing an electric power optical cable line M in the detection system is realized; m is the number of initial main units, and the initial value is equal to the value of N;
thirdly, the control processor calculates the actual fault point position y and the fault light path pair number z according to the acquired fault point information of the automatic fault detection k And numbering the actual fault point position y and the fault light path pair z k And uploading the serial number set Z of the fault optical path pair to a server; k is the failure detection times, and the initial value is 1; initializing a serial number set Z of a fault light path pair into an empty set;
fourthly, the control processor numbers the fault light path pair according to the obtained fault light path pair number z in the third step k And a failure optical path pair number set Z, a control main unit Z k The connection mode of the upper main unit and the lower main unit adjacent to the upper main unit and the lower main unit is as follows: control master unit z k And the last main cell z k 2 x 2 optical switch z between-1 k -1, respectively implementing optical interface 1 and optical interface 4, optical interface 2 and optical interface 3, control master unit z k And next master unit z k +1 between 2X 2 optical switches z k Respectively, optical interface 1 and optical interface 4, optical interface 2 and optical interface 3, to implement main unit z k And a slave unit z k Stripping to realize numbering of fault optical path k Stripped from the detection system, with M = M-1, k = k +1, and z will be k Added to the numbering set Z of the fault optical path pair, Z = Z U Z k ；
And (5) reconnecting the optical cable lines in the detection system, carrying out the full-coverage detection of the optical paths of the M pairs of optical cable lines, and returning to the step two.
The invention has the beneficial effects that: the system and the method for detecting the full coverage of the electric power crossing optical cable line simultaneously detect all optical fiber cores of the electric power crossing optical cable line on line, do not influence the normal communication of the electric power crossing optical cable line, and do not independently occupy the optical fiber cores of the optical cable; the method has the advantages that full-coverage detection and fault accurate positioning of each optical fiber core of the electric power crossing optical cable line are realized, and the problems that the existing detection mode cannot realize accurate detection of short-distance optical cable lines and optical fiber resources are wasted due to monopolization of the fiber cores based on an OTDR detection mode are solved; and the detection cost is reduced because the slave devices in the crossing section are passive devices, the operation adaptability of the detection system is improved, the stable operation of the electric power crossing optical cable line is ensured, and the detection requirement is met.
Drawings
FIG. 1 is a schematic structural view of a full-coverage electrical power crossover optical cable line detection system according to the present invention;
fig. 2 is a schematic diagram of the connection relationship between the master units after detecting a failure.
Detailed Description
In a first specific embodiment, the present embodiment is described with reference to fig. 1 and fig. 2, in which an electric power crossing optical cable line full-coverage detection system is implemented, and the detection system implements full-coverage simultaneous online detection of all optical fiber cores in an optical cable line under the condition that the electric power crosses communication of all light receiving optical paths and communication of light emitting optical paths in the optical cable line;
the detection system comprises a master device and a slave device, wherein the master device is installed on the side of a main pole tower spanning the power cable line, and the slave device is installed on the side of a spanning pole tower spanning the power cable line;
the main device includes N (24) main units, the N main units share a control processor, a light source, an OTDR, a first optical switch, a second optical switch, a third optical switch, a fourth optical switch, an optical power meter, and an optical attenuator, and a 2 × 2 optical switch disposed between adjacent main units;
each main unit has the same structure and comprises a main wavelength division multiplexer and a main demultiplexer; the slave device comprises N slave units; each slave unit has the same structure and comprises a slave wavelength division multiplexer and a slave demultiplexer;
and the N main units and the N auxiliary units jointly complete simultaneous online detection and automatic fault detection of N pairs of optical fiber light-emitting optical paths and light-receiving optical paths correspondingly crossing the power optical cable line.
The control processor is connected with the optical interface 1 by controlling the first optical switch optical interface 0 to realize that the light source optical interface is connected with the first optical switch optical interface 1, the first optical switch light is connected with the second optical switch, the second optical switch optical interface 0 is connected with the optical interface 1, is connected to the multiplexing port 3 of the main wavelength division multiplexer of the main unit 1, and is connected with the light inlet port 2 of the slave demultiplexer of the slave unit 1 through the light outlet port 2 of the main wavelength division multiplexer by crossing an electric power optical cable circuit;
the demultiplexing port 3 of the slave demultiplexer is connected with the multiplexing port 3 of the slave wavelength division multiplexer, the light outlet port 2 of the slave wavelength division multiplexer is connected with the light inlet port 2 of the master demultiplexer of the master unit 1 through the power spanning optical cable line, the demultiplexing port 3 of the master demultiplexer is connected with the multiplexing port 3 of the master wavelength division multiplexer of the master unit 2 through the 2 × 2 optical switch 1, and so on, so as to realize the sequential connection of the master unit 1 to the master unit N, control the third optical switch optical interface 0 to be connected with the optical interface 1, the demultiplexing port 3 of the master demultiplexer of the master unit N is connected with the third optical switch optical interface 1, connected with the third optical switch optical interface 0, and connected to the fourth optical switch optical interface 0, and the fourth optical switch optical interface 0 is connected with the optical interface 1 and the optical power meter optical interface, so as to realize the full-coverage on-line detection of the N pairs of light emitting optical paths and light receiving optical paths in the power spanning optical cable line under the communication condition.
In the online detection process, the control processor circularly reads the optical power value of the optical power meter, and when the read optical power value is lower than a set threshold, the control processor controls the first optical switch optical interface 0 to connect the optical interface 2 to the OTDR optical interface, so that the OTDR optical interface is sequentially connected with the first optical switch optical interface 2 and the optical interface 0, the first optical switch is connected with the second optical switch, and the second optical switch optical interface 0 connects the optical interface 1 to the multiplexing port 3 of the main wavelength division multiplexer in the main unit 1;
controlling the fourth optical switch optical interface 0 to be connected to the optical interface 2; the demultiplexing port 3 of the main demultiplexer of the main unit N is sequentially connected with a third optical switch optical interface 1 and an optical interface 0, the third optical switch is connected with a fourth optical switch, the fourth optical switch optical interface 0 is connected with an optical interface 2 and an optical attenuator optical interface, and full-coverage automatic fault detection of a light-emitting optical path and a light-receiving optical path across the power optical cable line N under a communication condition is realized; and uploading the automatic fault detection result to the server.
In a second embodiment, the present embodiment is a method for detecting by using the system for detecting full coverage of power spanning optical cable line in the first embodiment, and the detection method can realize simultaneous full coverage detection and automatic fault detection of a light emitting path and a light receiving path between the tower side of the main rod and the tower side spanning all optical fiber cores of the power spanning optical cable line. The specific process is as follows:
step one, the control processor is connected with an optical interface 1 by controlling a first optical switch optical interface 0, so that a light source optical interface is connected to the optical interface 0 through the first optical switch optical interface 1, a first optical switch light is connected with a second optical switch, the second optical switch optical interface 0 is connected with the optical interface 1, is connected to a multiplexing port 3 of a main wavelength division multiplexer of a main unit 1, is connected to a crossing power optical cable line through an optical outlet port 2 of the main wavelength division multiplexer through an ODF2, and is further connected to an optical inlet port 2 of a slave demultiplexer of a slave unit 1 through the ODF 3;
the demultiplexing port 1 of the slave demultiplexer is connected with the multiplexing port 3 of the slave wavelength division multiplexer, the light outlet port 2 of the slave wavelength division multiplexer is connected with the crossing power optical cable line through the ODF2 and is connected with the light inlet port 2 of the master demultiplexer of the master unit 1 through the ODF3, the 2 × 2 optical switch 1 between the master unit 1 and the master unit 2 is controlled to respectively realize the connection of the optical interface 1 and the optical interface 3, the optical interface 2 is connected with the optical interface 4, the demultiplexing port 3 of the master demultiplexer is connected with the multiplexing port 3 of the master wavelength division multiplexer of the master unit 2 through the 2 × 2 optical switch 1, and so on, the master unit 1 to the master unit N are sequentially connected, the third optical switch optical interface 0 is controlled to be connected with the optical interface 1, the demultiplexing port 3 of the master demultiplexer of the N is connected with the third optical switch optical interface 1, connected with the third optical interface 0 and connected with the fourth optical switch, and the fourth optical interface 0 is connected with the optical interface 1 and is connected with the optical interface of the optical switch, so as to realize the on-line optical path coverage detection of all light paths under the crossing optical communication conditions in the power line;
step two, in the online detection process, the control processor circularly reads the optical power value of the optical power meter, and when the read optical power value is lower than a set threshold, the control processor controls the first optical switch optical interface 0 to connect the optical interface 2 to the OTDR optical interface, so that the OTDR optical interface is connected with the first optical switch optical interface 2 and connected with the first optical switch optical interface 0, the first optical switch is connected with the second optical switch, and the second optical switch optical interface 0 is connected with the optical interface 1 and connected with the multiplexing port 3 of the main wavelength division multiplexer in the main unit 1;
controlling the fourth optical switch optical interface 0 to be connected to the optical interface 2; the demultiplexing port 3 of the main demultiplexer of the main unit N is sequentially connected with a third optical switch optical interface 1 and an optical interface 0, the third optical switch is connected with a fourth optical switch, the fourth optical switch optical interface 0 is connected with an optical interface 2 and an optical attenuator optical interface, and full-coverage automatic fault detection of a light-emitting optical path and a light-receiving optical path under a communication condition by crossing an electric power optical cable line M in the detection system is realized; m is the number of initial main units, and the initial value is equal to the value of N;
thirdly, the control processor calculates the actual fault point position y and the fault light path pair number z according to the acquired fault point information of the automatic fault detection k And numbering the actual fault point position y and the fault light path pair z k And uploading the serial number set Z of the fault light path pair to a server; k is the failure detection times, and the initial value is 1; initializing a fault light path pair number set Z into an empty set;
in this embodiment, the actual position y of the fault point and the serial number z of the fault optical path pair are calculated k The method comprises the following steps:
the y is formulated as:
y＝x％L
wherein,% is a remainder operation, x is a distance value between a fault point position and an OTDR initial position, and L is the total length of the optical cable line;
z is k The calculation steps are as follows:
step A, judging whether M is equal to N or not, if so, z k =1 x/2L; executing the step G; if not, executing the step B;
b, judging whether M is smaller than N, if so, executing the step C, and if not, finishing;
step C, judging whether min (Z) is greater than 1+ x/2L or not, if yes, Z is k =1+ x/2L; executing the step G; if not, executing the step D; min () implements the solution of the smallest element in the set;
step D, judging whether max (Z) -count (Z) is less than 1+ x/2L or not, if yes, Z is k =1+ x/2L + count (Z); executing the step G; if not, executing the step E; max () realizes solving the largest element in the set, and count () realizes solving the number of elements in the set;
step E, circularly taking Z from Z according to the sequence of the element values from small to large j Belongs to Z, judging
Whether is equal to 1+ x/2L, z j Is a selected value of Z, Z t All elements in Z which meet the condition; if so, then +>
Executing the step G; if not, executing the step F;
step F, judgment
Whether is greater than 1+ x/2L, if so, then
Executing the step G; if not, ending;
step G, adding z k Added to a fault light path pair numbering set Z, Z = ZU Z k 。
Fourthly, the control processor numbers the fault light path pair according to the obtained fault light path pair number z in the third step k And a failure optical path pair number set Z, a control main unit Z k The upper main unit and the lower main unit which are adjacent to the upper main unit and the lower main unit are connected in a mode that: control master unit z k And the last main cell z k 2X 2 photoswitch z between-1 k -1, respectively implementing optical interface 1 and optical interface 4, optical interface 2 and optical interface 3, control master unit z k And next master unit z k +1 between 2X 2 optical switches z k Respectively, optical interface 1 and optical interface 4, optical interface 2 and optical interface 3, to implement main unit z k And a slave unit z k Stripping to realize numbering of fault optical path k Stripped from the detection system, with M = M-1, k = k +1, and z will be k Added to a fault light path pair numbering set Z, Z = ZU Z k ；
And (5) reconnecting the optical cable lines in the detection system, carrying out the full-coverage detection of the optical paths of the M pairs of optical cable lines, and returning to the step two.
In this embodiment, the reconnection detection process needs to sequentially determine each main unit i (from 1 to N), and select whether or not the main unit i is reconnected according to whether or not each unit number i belongs to Z.
When the temperature is higher than the set temperature
And->
I.e. the numbers of the main unit i and the main unit i +1 do not belong to the failure number set Z, the main unit i and the main unit i +1 are connected by adopting the main unit connection mode in the step one,
when in use
And i +1 ∈ Z and ∈ H>
The main unit i and the subsequent main unit i +2 are connected by a 2 multiplied by 2 optical switch in the fourth step;
the decision is made by analogy to achieve a reconnection of master unit 1 to master unit N.
In this embodiment, when the fault light is generatedRoad pair number z k When the value of (1) is 1, the faulty optical path pair is numbered z k Adding the optical signals into a fault optical path pair number set Z, then controlling second optical switch light to realize that a second optical switch optical interface 0 is connected with an optical interface 2, controlling a 2 x 2 optical switch 1 between a main unit 1 and a main unit 2 to respectively realize that the optical interface 1 is connected with an optical interface 4, and connecting the optical interface 2 with an optical interface 3 to realize the stripping of the main unit 1 and a slave unit 1, further realizing the stripping of a fault optical path pair 1 from a detection system, and enabling M = M-1.
In this embodiment, when the faulty optical path is numbered z k When the value of (1) is N, the fault light path pair is numbered with z k Adding the optical signals into a fault optical path pair number set Z, controlling third optical switch light to realize connection of a third optical switch optical interface 1 and an optical interface 2, controlling a 2 x 2 optical switch N-1 between a main unit N and a last main unit N-1, respectively realizing connection of the optical interface 1 and an optical interface 4, and connecting the optical interface 2 and an optical interface 3, realizing stripping of the main unit N and a slave unit N, further realizing stripping of the fault optical path pair N from a detection system, enabling M = M-1, and enabling N = N-1.
In this embodiment, the light source is a 1625nm pulse laser, and the first optical switch, the second optical switch, the third optical switch, and the fourth optical switch are all 1 × 2 optical switches; the OTDR is an OTDR module, the optical power meter is an optical power meter module, the master demultiplexer and the slave demultiplexer are wavelength division demultiplexer modules, the master wavelength division multiplexer and the slave wavelength division multiplexer are wavelength division multiplexer modules, and the optical attenuator is a fixed optical fiber attenuator.
In this embodiment, the control processor is an FPGA development board of EP3C 55.
The third embodiment is an example of the second embodiment:
in this embodiment, when N =24 and a fault occurs in the 1 st detection process, step three is executed, the number of times k of fault detection is 1, and assuming that the value of 1+ x/2L is 3 at this time, the initial value of M is 24, and M = = N is satisfied, according to the calculation of z when M = = N 1 ，z 1 (= 1) x/2L, namely z 1 Is 3,Z = { } { [ U ] z 1 ＝{z 1 }；
Executing the fourth step, the control processor acquires the numbers z of the fault light-emitting light path and the light-receiving light path according to the third step 1 =3 and number set Z = { Z = 1 Control master unit z 1 Connection mode of the main unit 3 and the adjacent upper and lower main units, control of the 2 × 2 optical switch 2 between the main unit 3 and the upper main unit 2 to respectively realize connection of the optical interface 1 and the optical interface 4, connection of the optical interface 2 and the optical interface 3, control of the 2 × 2 optical switch 3 between the main unit 3 and the lower main unit 4 to respectively realize connection of the optical interface 1 and the optical interface 4, connection of the optical interface 2 and the optical interface 3 to realize separation of the main unit 3 and the slave unit 3 and further realize separation of the fault optical path pair 3 from the system, so that M = M-1=23, because of z 1 The value of (3) is not 24, N = N-1, N is 24, k = k +1, k is 2, and the optical cable line in the system is reconnected to perform the detection of the full coverage of the light emitting optical path and the light receiving optical path by 23 pairs, and the process returns to the step two.
When a fault occurs, step three is executed again, and assuming that 1+ x/2L is 1, k is 2, M is 23 and N is 24, M is satisfied<N, min (Z) is 3, which satisfies min (Z)>1+ x/2L, then according to z k =1+ x/2L, calculating z 2 Has a value of 1,Z = { z = 1 }∪z 2 ＝{z 1 ,z 2 }。
Executing the fourth step, the control processor acquires the numbers z of the fault light-emitting light path and the light-receiving light path according to the third step 2 =1 and number set Z = { Z = 1 ,z 2 H, control master unit z 2 Connection mode of upper and lower main units and common devices adjacent to each other, optical interface 0 of a second optical switch above main unit 1 is connected with optical interface 2, 2 × 2 optical switch 1 between main unit 1 and next main unit 2 is controlled to respectively realize connection of optical interface 1 and optical interface 4, optical interface 2 is connected with optical interface 3 to realize stripping of main unit 1 and slave unit 1, further to realize stripping of fault optical path pair 1 from system, so that M = M-1, M is 22, and because z is 2 If the value of (1) is not 24, N = N-1 is not performed, N is 24, k = k +1 is made, k is 3, the optical cable line in the system is reconnected, 22 pairs of the light emitting optical path and the light receiving optical path are detected to be fully covered, and the process returns to the step two.
When a fault occurs, step three is executed again, and the situation is assumed to be1+ x/2L is 22, k is 3, M is 22, N is 24, satisfying M<N, from min (Z) being 1, and count (Z) being 2, max (Z) being 3, satisfying max (Z) -count (Z) being less than 1+ x/2L, then Z is k ＝1+x/2L+count(Z)；
Calculating z 3 Has a value of 24,Z = { z = 1 }∪z 2 ＝{z 1 ,z 2 ,z 3 }。
Executing the fourth step, the control processor acquires the numbers z of the fault light-emitting light path and the light-receiving light path according to the third step 3 =24 and number set Z = { Z = 1 ,z 2 ,z 3 Control master unit z 3 The connection mode of the upper main unit and the lower main unit and the common device that are adjacent to the control main unit 24 is that a 2 × 2 optical switch 22 between the control main unit 24 and the upper control main unit 23 is respectively connected to the optical interface 1 and the optical interface 4, and the optical interface 2 and the optical interface 3; the optical interface 0 of the third optical switch below the control is connected with the optical interface 2, so that the main unit 24 and the slave unit 24 are separated, further the fault optical path pair 24 is separated from the system, M = M-1 is enabled, M is 21, and z is caused 3 When the value of (3) is 24, N = N-1 is performed, N is obtained as 23, k = k +1 is obtained as 4, and the optical fiber line 21 in the system is reconnected to perform the detection of the full coverage of the light emitting optical path and the light receiving optical path, and the process returns to the step two again.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (5)
1. The method for detecting the full coverage of the electric power crossing optical cable line is realized by a detection system; the detection system realizes the simultaneous on-line detection of the full coverage of all the fiber cores in the optical cable line under the condition that the electric power spans all the fiber cores in the optical cable line;
the detection system comprises a master device and a slave device, wherein the master device is installed on the side of a main pole tower spanning the power cable line, and the slave device is installed on the side of a spanning pole tower spanning the power cable line;
the main device comprises N main units, a control processor shared by the N main units, and a light source, an OTDR, a first optical switch, a second optical switch, a third optical switch, a fourth optical switch, an optical power meter and an optical attenuator which are respectively connected with the control processor; and a 2 × 2 optical switch disposed between adjacent main cells;
the slave device comprises N slave units;
each master unit includes a master wavelength division multiplexer and a master demultiplexer; each slave unit comprises a slave wavelength division multiplexer and a slave demultiplexer;
the N main units and the N auxiliary units jointly complete simultaneous on-line monitoring and fault detection of N pairs of optical fiber light-emitting optical paths and light-receiving optical paths correspondingly spanning the power optical cable line;
the control processor is sequentially connected with the first optical switch, the second optical switch and the multiplexing port of the main wavelength division multiplexer of the main unit 1 through a control light source optical interface, and is connected with the light inlet port of the slave demultiplexer of the slave unit 1 through a cross-over power optical cable line through the light outlet port of the main wavelength division multiplexer;
the demultiplexing port of the slave demultiplexer is connected with the multiplexing port of the slave wavelength division multiplexer, the light outlet port of the slave wavelength division multiplexer is connected with the light inlet port of the master demultiplexer of the master unit 1 through the crossing power optical cable line, the demultiplexing port of the master demultiplexer is connected to the multiplexing port of the master wavelength division multiplexer of the master unit 2 through a 2 x 2 optical switch, and so on, so as to realize the sequential connection of the master unit 1 to the master unit N, the demultiplexing port of the master demultiplexer of the master unit N is sequentially connected with a third optical switch, a fourth optical switch and an optical power meter, and realize the full-coverage online detection of N pairs of optical paths in the crossing power optical cable line under the communication condition;
in the online detection process, the control processor circularly reads the optical power value of the optical power meter, and when the read optical power value is lower than a set threshold, the control processor controls the OTDR optical interface to be sequentially connected with the first optical switch, the second optical switch and the multiplexing port of the main wavelength division multiplexer in the main unit 1;
controlling a demultiplexing port of a main demultiplexer of the main unit N to be sequentially connected with a third optical switch, a fourth optical switch and an optical attenuator, so as to realize full-coverage automatic fault detection of the optical path crossing the power optical cable line M under the communication condition; uploading the automatic fault detection result to a server; the method is characterized in that:
according to the result of automatic fault detection, acquiring the actual fault point position and the fault light path pair number, and rejecting a fault unit; the method is specifically realized by the following steps:
the control processor is sequentially connected with a first optical switch, a second optical switch and a multiplexing port of a main wavelength division multiplexer of a main unit 1 through a control light source optical interface, and is connected with a light inlet port of a slave demultiplexer of a slave unit 1 through a cross-power optical cable line through a light outlet port of the main wavelength division multiplexer;
the demultiplexing port of the slave demultiplexer is connected with the multiplexing port of the slave wavelength division multiplexer, the light outlet port of the slave wavelength division multiplexer is connected with the light inlet port of the master demultiplexer of the master unit 1 through the power spanning optical cable line, the demultiplexing port of the master demultiplexer is connected to the multiplexing port of the master wavelength division multiplexer of the master unit 2 through an optical switch, and so on, so that the master unit 1 to the master unit N are sequentially connected, the demultiplexing port of the master demultiplexer of the master unit N is sequentially connected with a third optical switch, a fourth optical switch and an optical power meter, and full-coverage online monitoring of an optical path in the power spanning optical cable line under a communication condition is realized;
step two, in the online monitoring process, the control processor circularly reads the optical power value of the optical power meter, and when the read optical power value is lower than a set threshold, the control processor controls the first optical switch optical path 0 to be connected to the optical path 2;
controlling an OTDR optical interface to be sequentially connected with a first optical switch, a second optical switch and a multiplexing port of a main wavelength division multiplexer in a main unit 1;
controlling a demultiplexing port of a main demultiplexer of the main unit N to be sequentially connected with a third optical switch, a fourth optical switch and an optical attenuator, and realizing full-coverage automatic fault detection of a light-emitting optical path and a light-receiving optical path under a communication condition by crossing an electric power optical cable circuit M in a detection system; m is the number of initial main units, and the initial value is equal to the value of N;
thirdly, the control processor calculates the position y of the actual fault point and the serial number z of the fault light path pair according to the acquired fault point information of the automatic fault detection k And numbering the actual fault point position y and the fault light path pair z k And uploading the serial number set Z of the fault light path pair to a server; k is the detection times, and the initial value is 1; initializing a serial number set Z of a fault light path pair into an empty set;
fourthly, the control processor numbers the fault light path pair according to the obtained fault light path pair number z in the third step k And a fault optical path pair number set Z, a control main unit Z k The connection mode of the upper main unit and the lower main unit adjacent to the upper main unit and the lower main unit is as follows: control master unit z k And the last main unit z k 2 x 2 optical switch z between-1 k -1, respectively connected to port 1 and port 4 and to port 2 and port 3, controlling the master unit z k And the next master unit z k +1 between 2X 2 optical switches z k Respectively realize the connection of port 1 and port 4 and the connection of port 2 and port 3, and realize the main unit z k And a slave unit z k Stripping to realize numbering of fault optical path k Stripped from the detection system, with M = M-1, k = k +1, and z will be k Added to a fault light path pair numbering set Z, Z = ZU Z k ；
And (5) reconnecting, monitoring the full coverage of the optical paths of the M pairs of the optical cable lines in the detection system, and returning to the step two.
2. The method of full coverage detection of an electrical power span fiber optic line of claim 1, wherein: in the monitoring process of reconnection, i is more than or equal to 1 and less than or equal to N for each main unit i; sequentially judging whether the main unit i is reconnected or not according to whether the main unit number i belongs to Z or not;
when in use
And->
I.e. the numbers of the main unit i and the main unit i +1 do not belong to the failure number set Z, the main unit i and the main unit i +1 are connected by adopting the main unit connection mode in the step one,
when in use
And i +1 ∈ Z and ∈ H>
And the main unit i and the subsequent main unit i +2 adopt the 2 multiplied by 2 optical switch in the step four to carry out main unit connection, and the judgment is carried out by analogy, so that the connection from the main unit 1 to the main unit N is realized.
3. The method of full coverage detection of an electrical power span fiber optic line of claim 1, wherein: calculating the actual fault point position y and the fault light path pair number z k The method comprises the following steps:
the y is formulated as:
y＝x％L
wherein,% is a remainder operation, x is a distance value between a fault point position and an OTDR initial position, and L is the total length of the optical cable line;
z is k The calculation steps are as follows:
step A, judging whether M is equal to N or not, if so, z k =1+ x/2L; executing the step G; if not, executing the step B;
b, judging whether M is smaller than N, if so, executing the step C, and if not, finishing;
step C, judging whether min (Z) is greater than 1+ x/2L or not, if so, Z k =1+ x/2L; executing the step G; if not, executing the step D; min () implements the solution of the smallest element in the set;
step D, judging whether max (Z) -count (Z) is less than 1+ x/2L, if so, Z k =1+ x/2L + count (Z); executing the step G; if not, executing the step E; max () realizes solving the largest element in the set, and count () realizes solving the number of elements in the set;
step E, circularly taking Z from Z according to the sequence of the element values from small to large j E.g. Z, judging
/>
Whether or not equal to 1+ x/2L, z j Is a selected value of Z, Z t All elements in Z which meet the condition; if so, then->
Executing the step G; if not, executing the step F;
step F, judgment
Whether is greater than 1+ x/2L, if so, then
If not, ending the step G;
step G, adding z k Added to a fault light path pair numbering set Z, Z = ZU Z k 。
4. The method of claim 1, wherein the method comprises: when the fault light path pair is numbered z k When the value of (1) is 1, the fault optical path is numbered with z k Adding into the number set Z of the faulty optical path pair, and then controllingThe main unit 1 is connected with the second optical switch port 0 and the port 2, the 2 × 2 optical switch 1 between the main unit 1 and the main unit 2 is controlled, the port 1 and the port 4 are connected, the port 2 and the port 3 are connected, the main unit 1 and the slave unit 1 are separated, further the fault optical path pair 1 is separated from the detection system, and M = M-1 is achieved.
5. The method of claim 1, wherein the method comprises: when the fault light path pair is numbered z k When the value of (b) is N, the fault light path pair is numbered z k Adding the optical path pair number into a fault optical path pair number set Z, then controlling a main unit N to be connected with a third optical switch port 0 and a port 2, controlling a 2 x 2 optical switch N-1 between the main unit N and a last main unit N-1, respectively realizing connection of a port 1 and a port 4, and connecting a port 2 and a port 3, realizing stripping of the main unit N and a slave unit N, further realizing stripping of the fault optical path pair N from a detection system, and enabling M = M-1 and N = N-1.
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