CN212305337U - Optical cable remote monitoring device at tail end of power optical transmission network - Google Patents

Abstract

The utility model relates to an end optical cable remote monitoring device of electric power optical transmission network belongs to electric power communication optical cable remote monitoring technical field. The utility model discloses in the downstream website, utilize the optical distribution frame that the optical divider connects the multicore optical cable with the light that one of them optical port of optical transmission equipment sent wherein idle many fibre cores, with the optical signal transmission to the optical distribution frame of the corresponding multicore optical cable of upstream website and enter into photoelectric monitoring module, the photoelectric monitoring module of upstream website converts the light signal into the signal of telecommunication and enlargies through its photodiode, the singlechip will gather these signals of telecommunication and convey to the main station end. The utility model discloses can prevent in advance through periodic monitoring that the real-time business of electric power production that the optical cable caused is interrupted for the security of electric power communication network operation improves greatly. The optical cable core-breaking device can remotely adjust the core to the standby fiber core under the condition of breaking the optical cable core, thereby reducing the business trip rate of communication operation and maintenance personnel and substation watch personnel and saving manpower and financial resources.

Description

Optical cable remote monitoring device at tail end of power optical transmission network

Technical Field

The utility model belongs to the technical field of power communication optical cable remote monitoring, concretely relates to terminal optical cable remote monitoring device of electric power optical transmission network.

Background

As the tail end of the power optical cable network is mostly networked by adopting a star-shaped structure (as shown in figure 1), and the multi-purpose ADSS optical cable and the common optical cable are formed, the surrounding environment of the optical cable is complex, the optical cable is difficult to maintain, and the optical cable is very easy to interrupt and break due to gnawing of small animals and external force damage. The terminal station of the power optical cable network bears less traffic, the importance is not high, but the real-time performance is strong, and the terminal station needs to be processed as soon as possible after interruption. Taking fig. 1 as an example, the station a is used as a networking upstream station, the station C is used as a networking downstream station, and when an electric power optical cable between the station a and the station C is interrupted, all services carried in a direction from the optical transmission device of the station C to the master station end are interrupted. At present, the daily operation and maintenance of the optical cable adopts operation and maintenance personnel to go to the site once a year to carry out the scheduled inspection and the test of the idle fiber core, and because the point is multi-path and the operation and maintenance period is long, the core breakage of the idle fiber core of the optical cable often occurs in the daily operation and maintenance and cannot be found in time, and finally the optical path is interrupted in operation, so that the operation service is influenced. Therefore, a remote monitoring device is needed to judge the on-off of the optical cable, so that the residual quantity of electric power communication operation and maintenance personnel is reduced, and the optical cable scheduled inspection efficiency and frequency at the tail end of an electric power optical cable network are improved.

Currently, optical cable online remote monitoring equipment which is researched and applied is realized by integrating an OTDR and an online remote monitoring system, the OTDR remote test is controlled by the online remote monitoring system, and then the data is transmitted back to a monitoring main station to judge the optical cable fault and position the fault point (chensu application of the optical cable monitoring system in communication transmission [ J ] kohai story exposition: science and technology exploration 2011(12): 121-. The existing equipment is connected with a monitoring main station and an end station in a public network data return mode, and needs to be remotely controlled to use an optical switch to a test light path for testing, so that the safety of a power communication private network is greatly impacted. This device is fully functional but complex in construction and expensive in cost and is not suitable for use at the end of a power cable network. Therefore, how to overcome the defects of the prior art is a problem which needs to be solved in the technical field of remote monitoring of the power communication optical cable at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving prior art's not enough, provide an optical cable remote monitoring device that electric power optical transmission network is terminal, can realize carrying out remote monitoring to the electric power optical cable through the device, low cost, but wide application is on the branch optical cable of electric power optical cable net end with star type network deployment.

In order to achieve the above object, the utility model adopts the following technical scheme:

the optical cable remote monitoring device at the tail end of the power optical transmission network specifically comprises:

in a downstream station, light emitted by one optical port of optical transmission equipment is connected with a plurality of idle fiber cores in an optical fiber distribution frame of a multi-core optical cable by using an optical splitter, optical signals are transmitted to the optical fiber distribution frame of the multi-core optical cable corresponding to an upstream station and enter an optoelectronic monitoring module, the optoelectronic monitoring module of the upstream station converts the optical signals into electrical signals through a photodiode of the optoelectronic monitoring module and amplifies the electrical signals, and a single chip microcomputer collects the electrical signals and transmits the electrical signals to a main station end;

connecting the light emitting ports of the interconnected optical ports of the optical transmission equipment of the upstream site and the optical transmission equipment of the downstream site with an 1/2 optical splitter respectively, and uniformly distributing and sending out the sent optical signals, wherein the light emitting ports of the optical transmission equipment of the downstream site are accessed to the optical fiber distribution frame of the multi-core power optical cable in the downstream site, and the light emitting ports of the optical transmission equipment of the upstream site are accessed to the optical fiber distribution frame of the corresponding multi-core optical cable in the upstream site;

in an upstream site, two fiber cores connected with a light emitting port of optical transmission equipment corresponding to the downstream site are connected into a 2-to-1 optical switch, and the voltage of the single chip microcomputer is used for controlling the 2-to-1 optical switch to selectively receive optical signals;

at a downstream station, connecting 1/2 one of two fiber cores connected with a light emitting port of an optical transmission device corresponding to an upstream station into an uneven splitter, respectively connecting two ports of 1/2 uneven splitter with a 1-path photoelectric monitoring module and a 2-to-1 optical switch of the downstream station, and connecting the other of the two fiber cores connected with the light emitting port of the optical transmission device corresponding to the upstream station into the 2-to-1 optical switch; the photoelectric monitoring module is connected with the optical switch of 1-out-of-2, and the voltage of the photoelectric monitoring module is utilized to control the optical switch of 1-out-of-2 to select to receive optical signals.

Further, it is preferable that the downstream station apparatus connects the light emitted from one of the optical ports of the optical transmission equipment to the spare 8 cores of the optical distribution frame of the 12-core optical cable by using the 1/8 optical splitter.

Further, it is preferable that the photo monitoring module amplifies the current generated by its photodiode to a level of 3.3V.

Further, it is preferable that one of the two cores connected to the light emitting port of the optical transmission device corresponding to the upstream station is connected 1/2 non-uniform splitter, 80% of which is used for optical signal transmission, and sent to the 2-out-of-1 optical switch.

Further, preferably, the single chip microcomputer is of a raspberry type 3B.

Further, preferably, an RJ45 ethernet interface of the single chip microcomputer is used for docking with the optical transmission device, and is connected with the master station end through a network dedicated line.

A method for remotely monitoring an optical cable at the tail end of an electric power optical transmission network adopts the optical cable remote monitoring device at the tail end of the electric power optical transmission network and comprises the following steps:

step (1), the master station end receives signals transmitted by a plurality of idle fiber cores of a downstream station, if the master station end receives normal signals of all idle fiber cores, the master station end judges that all idle fiber cores operate normally, and the smooth transmission of a light path is monitored; if the main station end receives a signal of interruption of a certain idle fiber core, judging that the idle fiber core is interrupted and needing to carry out optical cable operation and maintenance;

step (2), the downstream photoelectric monitoring module monitors the optical signal with a lower ratio, which is split by the non-uniform splitter at the downstream station 1/2;

when an optical signal exists, the photoelectric monitoring module outputs a high level to the 1-from-2 optical switch, and the 1-from-2 optical switch selectively receives 1/2 the optical signal with a higher ratio split by the non-uniform splitter;

when the optical signal is interrupted, the photoelectric monitoring module outputs low level to the optical switch 4 of 1 from 2, the optical switch of 1 from 2 selectively receives the other fiber core of the optical switch of 1 from 2, and the automatic switching of the standby optical path is realized, so that the optical path and the service in operation are recovered.

The utility model discloses in the upper reaches website, utilize the singlechip to monitor, control accent core and remote communication. Because the singlechip is comparatively ripe product on the existing market, so the utility model discloses do not do specific restriction to the producer and the model of singlechip, as long as can realize the utility model discloses the product of effect all can.

The utility model discloses in the low reaches website, divide the optical splitter through 1/2 inequality and draw 20% light signal as the method of monitoring with the light path.

On the one hand, the utility model discloses a whether artificial regularly remote monitoring power optical cable idle fibre core interrupts (preferred, artificial every month regularly monitors once) to select a set of reserve fibre core in idle optical cable and carry out long-range accent core, if interrupt with the light path, can transfer the short recovery business of core. Therefore, the power communication operation and maintenance personnel can timely respond and process the defective optical cable in advance, the optical cable is eliminated in a planned working mode, the risk of sudden interruption of the real-time production service of the transformer substation is reduced, and meanwhile, the service interruption duration can be greatly reduced.

On the other hand, the utility model discloses from the actual conditions of power optical cable net end node, only need monitor the break-make of idle fibre core, do not need integrated OTDR module for equipment cost greatly reduced. And, the utility model discloses can adopt the mode of long-range login singlechip to monitor and control, the singlechip of transformer substation's distal end utilizes the mode and the main website end intercommunication that optical transmission equipment opened the network special line at the optical cable upper reaches website, has avoided the uncontrollable public network of equipment utilization to carry out the interconnection, adopts the mode networking of physics isolation, has improved network security degree nature.

The utility model discloses can select for use the inhomogeneous beam splitter of 1/2 of different proportions according to actual conditions, as long as the beam split that is used for optical signal transmission satisfies the optical power of business demand can, for example 70% and 30%.

Through the utility model discloses can carry out the idle fibre core of optical cable to the scene and interrupt the detection without going on business, only need use computer long-range login device just can detect idle fibre core at main website end. When the core breaking of the power optical cable causes the interruption of the in-use optical path, the downstream station device can automatically adjust the optical path to the standby fiber core, and the upstream station can remotely log in a single chip microcomputer to control the device to switch the in-use optical path to the standby fiber core so as to recover the optical path and the in-operation service; specifically, the monitoring process at the slave master station end may be as follows: the computer at the main station is connected with the network special line and logs in the singlechip through an SSH mode: detecting a vacant fiber core: sending an 'inspection' command to a single chip microcomputer, and after reading the voltage of a pin connected with an upstream station photoelectric monitoring module, the single chip microcomputer returns 'the 3 rd core normal of the spare fiber core of the power optical cable' and 'the 4 th core normal of the spare fiber core of the power optical cable' on a main station computer screen, so that the 8-core spare fiber core is displayed to be normal in operation in sequence; if the spare fiber core is in fault, the 'n-th core interruption of the spare fiber core of the power optical cable' can be returned, and the power optical cable operation and maintenance personnel can eliminate the optical cable fault according to the number of the interruption. Secondly, standby fiber core inversion: if the optical transmission network management of the master station end detects that the optical path of the optical cable is interrupted, the optical transmission network management logs in a single chip microcomputer through a computer and sends a standby fiber core switching command to the single chip microcomputer, a pin connected with a 2-to-1 optical switch of an upstream station outputs high voltage to the 2-to-1 optical switch, the 2-to-1 optical switch acts, the optical path is switched to the standby fiber core to operate, and the optical path is recovered to be normal. But is not limited thereto.

Compared with the prior art, the utility model, its beneficial effect does:

the utility model discloses from the actual start of electric power optical cable fortune dimension situation, deploy the terminal optical cable remote monitoring device of electric power optical transmission network on the star type end station of electric power optical cable net, communication fortune dimension personnel can carry out the channel test to the optical cable in that main website end is long-range, this makes electric power optical cable examine efficiency improvement surely, and can become monthly remote detection by the original annual arrival station detection, this makes electric power communication fortune dimension personnel master the terminal optical cable behavior of electric power optical cable more clearly, and can prevent the electric power production real-time service that the optical cable caused to break off in advance through periodic monitoring and interrupt, make the security of electric power communication network operation improve greatly. The optical cable core-breaking device can remotely adjust the core to the standby fiber core under the condition of breaking the optical cable core, thereby reducing the business trip rate of communication operation and maintenance personnel and substation watch personnel and saving manpower and financial resources.

The existing situation is as follows: firstly, the detection of the vacant fiber cores of the power optical cable is carried out once a year by power communication operation and maintenance personnel, taking the Jingjing power supply office as an example, 127 related optical cables are used in the background technology, business trip work is required to be arranged 127 times every year in the detection work of the vacant fiber cores of the power optical cable, and the business trip related to the work can be cancelled after the device is used.

Secondly, if the optical cable core breaking occurs, the primary optical fiber is broken but the standby optical fiber is normal, the device can be used for trying to remotely adjust the core to the standby optical fiber core for use, taking the Jingjing power supply office as an example, the optical cable core breaking conditions in 2018 and 2019 are counted, the average number of times of the condition that the core can be recovered through core adjustment after the core breaking occurs every year is 63, after the condition occurs, 2 groups of people (at least 2 people in each group) need to enter an upstream station and a downstream station respectively for core adjustment and recovery, and the business trip related to the core adjustment work can be cancelled after the device is used.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic diagram of a star-type networking structure at the end of an optical power cable network;

FIG. 2 is a system diagram of the structure of the device of the present invention; wherein, 1, 1/2 spectroscope; 2. 1/8 a beam splitter; 3. 1/2 uneven splitter; 4. 2-to-1 optical switch; 5. 1-path photoelectric monitoring module; 6. 8-path photoelectric monitoring modules; 7. a single chip microcomputer; 8. a control computer of the master station end; the arrow line of the gray ribbon indicates the transmission direction of the optical fiber and the optical signal; black bar arrow lines with letter e on top to indicate direction of electric wire and electric signal; the circled numbers indicate the second core of the 12-core cable; the number with brackets represents the number of paths of the photoelectric monitoring module;

FIG. 3 is a voltage amplifying circuit diagram of the photo-detection module;

FIG. 4 is a diagram of the structure of an 8-channel photoelectric monitoring module; the optical signal transmission and transmission direction is represented by a gray line with a circle at one end and an arrow at the other end, and the electric signal transmission and transmission direction is represented by a black line with an arrow;

FIG. 5 is a diagram of a 1-way photoelectric monitoring module; the optical signal transmission and transmission direction is represented by a gray line with a circle at one end and an arrow at the other end, and the electric signal transmission and transmission direction is represented by a black line with an arrow;

FIG. 6 is a topological diagram of a local electric power cable network; wherein the square represents a 110KV substation and the circle represents a 35KV substation.

Detailed Description

The present invention will be described in further detail with reference to examples.

It will be appreciated by those skilled in the art that the following examples are illustrative of the invention only and should not be taken as limiting the scope of the invention. The specific techniques, connections, conditions, or the like, which are not specified in the examples, are performed according to the techniques, connections, conditions, or the like described in the literature in the art or according to the product specification. The materials, instruments or equipment are not indicated by manufacturers, and all the materials, instruments or equipment are conventional products which can be obtained by purchasing.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Further, "connected" as used herein may include wirelessly connected.

In the description of the present invention, "a plurality" means two or more unless otherwise specified. The terms "inner," "upper," "lower," and the like, refer to an orientation or a state relationship based on that shown in the drawings, which is for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "provided" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. To those of ordinary skill in the art, the specific meaning of the above terms in the present invention is understood according to the specific situation.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Example 1

As shown in fig. 2, the optical cable remote monitoring device at the end of the power optical transmission network specifically includes:

in a downstream station, light emitted from one optical port of the optical transmission equipment is connected with a plurality of idle fiber cores in an optical fiber distribution frame of a multi-core optical cable by using an optical splitter, optical signals are transmitted to the optical fiber distribution frame of the multi-core optical cable corresponding to an upstream station and enter an optoelectronic monitoring module, the optoelectronic monitoring module of the upstream station converts the optical signals into electrical signals through a photodiode of the optoelectronic monitoring module and amplifies the electrical signals, and a singlechip 7 acquires the electrical signals and transmits the electrical signals to a main station end;

connecting the light emitting ports of the interconnected optical ports of the optical transmission equipment of the upstream site and the optical transmission equipment of the downstream site with an 1/2 optical splitter 1 respectively, uniformly distributing and sending out the sent optical signals, accessing the light emitting ports of the optical transmission equipment of the downstream site to the optical fiber distribution frame of the multi-core power optical cable in the downstream site, and accessing the light emitting ports of the optical transmission equipment of the upstream site to the optical fiber distribution frame of the corresponding multi-core optical cable in the upstream site;

in an upstream site, two fiber cores connected with a light emitting port of optical transmission equipment corresponding to the downstream site are connected to a 2-to-1 optical switch 4, and the voltage of the singlechip 7 is utilized to control the 2-to-1 optical switch 4 to selectively receive optical signals;

at a downstream station, connecting 1/2 one of two fiber cores connected with a light emitting port of an optical transmission device corresponding to an upstream station into the uneven splitter 3, respectively connecting two ports of 1/2 uneven splitter 3 with 1-path photoelectric monitoring module 5 and 2-to-1 optical switch 4 of the downstream station, and connecting the other of the two fiber cores connected with the light emitting port of the optical transmission device corresponding to the upstream station into the 2-to-1 optical switch 4; the photoelectric monitoring module 5 is connected with the optical switch of 1-out-of-2, and the optical switch of 1-out-of-2 4 is controlled by the voltage of the photoelectric monitoring module 5 to select to receive optical signals.

Example 2

As shown in fig. 2, the optical cable remote monitoring device at the end of the power optical transmission network specifically includes:

in a downstream station, light emitted from one optical port of the optical transmission equipment is connected with a plurality of idle fiber cores in an optical fiber distribution frame of a multi-core optical cable by using an optical splitter, optical signals are transmitted to the optical fiber distribution frame of the multi-core optical cable corresponding to an upstream station and enter an optoelectronic monitoring module, the optoelectronic monitoring module of the upstream station converts the optical signals into electrical signals through a photodiode of the optoelectronic monitoring module and amplifies the electrical signals, and a singlechip 7 acquires the electrical signals and transmits the electrical signals to a main station end;

connecting the light emitting ports of the interconnected optical ports of the optical transmission equipment of the upstream site and the optical transmission equipment of the downstream site with an 1/2 optical splitter 1 respectively, uniformly distributing and sending out the sent optical signals, accessing the light emitting ports of the optical transmission equipment of the downstream site to the optical fiber distribution frame of the multi-core power optical cable in the downstream site, and accessing the light emitting ports of the optical transmission equipment of the upstream site to the optical fiber distribution frame of the corresponding multi-core optical cable in the upstream site;

in an upstream site, two fiber cores connected with a light emitting port of optical transmission equipment corresponding to the downstream site are connected to a 2-to-1 optical switch 4, and the voltage of the singlechip 7 is utilized to control the 2-to-1 optical switch 4 to selectively receive optical signals;

at a downstream station, connecting 1/2 one of two fiber cores connected with a light emitting port of an optical transmission device corresponding to an upstream station into the uneven splitter 3, respectively connecting two ports of 1/2 uneven splitter 3 with 1-path photoelectric monitoring module 5 and 2-to-1 optical switch 4 of the downstream station, and connecting the other of the two fiber cores connected with the light emitting port of the optical transmission device corresponding to the upstream station into the 2-to-1 optical switch 4; the photoelectric monitoring module 5 is connected with the optical switch of 1-out-of-2, and the optical switch of 1-out-of-2 4 is controlled by the voltage of the photoelectric monitoring module 5 to select to receive optical signals.

Wherein, the downstream station device connects the light emitted from one optical port of the optical transmission equipment with the spare 8 cores of the optical distribution frame of the 12-core optical cable by using 1/8 optical splitters.

The photo-monitoring module amplifies the current generated by its photodiode to a 3.3V level.

One of two fiber cores connected with a light emitting port of the optical transmission equipment corresponding to the upstream station is connected into 1/2 uneven splitter 3, 80% of the two fiber cores are used for optical signal transmission, and the optical signal is sent into the 2-to-1 optical switch 4.

The singlechip 7 adopts a raspberry type 3B.

The RJ45 Ethernet interface of the singlechip 7 is butted with the optical transmission equipment, and is connected with the main station end through a network special line.

The optical cable remote monitoring method at the tail end of the power optical transmission network adopts the optical cable remote monitoring device at the tail end of the power optical transmission network, and comprises the following steps:

step (1), the master station end receives signals transmitted by a plurality of idle fiber cores of a downstream station, if the master station end receives normal signals of all idle fiber cores, the master station end judges that all idle fiber cores operate normally, and the smooth transmission of a light path is monitored; if the main station end receives a signal of interruption of a certain idle fiber core, judging that the idle fiber core is interrupted and needing to carry out optical cable operation and maintenance;

step (2), the downstream photoelectric monitoring module monitors the optical signal with a lower ratio, which is split by the non-uniform splitter at the downstream station 1/2;

when an optical signal exists, the photoelectric monitoring module outputs a high level to the 1-from-2 optical switch, and the 1-from-2 optical switch selectively receives 1/2 the optical signal with a higher ratio split by the non-uniform splitter;

when the optical signal is interrupted, the photoelectric monitoring module outputs low level to the optical switch 4 of 1 from 2, the optical switch of 1 from 2 selectively receives the other fiber core of the optical switch of 1 from 2, and the automatic switching of the standby optical path is realized, so that the optical path and the service in operation are recovered.

Example 3

As shown in fig. 2, the utility model discloses totally 3 parts divide into vacant fibre core break-make monitoring part, reserve fibre core switching part and single chip microcomputer control part. Fig. 2 is a structural system diagram of the device of the present invention. Taking fig. 1 as an example, the site a serves as a networking upstream site, and the site C serves as a networking downstream site.

Firstly, a spare fiber core on-off monitoring part:

the downstream station device is mainly responsible for connecting light emitted by one optical port of the optical transmission equipment with idle 8 cores (3, 4, 5, 6, 9, 10, 11 and 12) in an optical distribution frame of a 12-core optical cable by using an optical splitter, transmitting optical signals to an upstream station, converting the optical signals into electric signals by 8 photoelectric monitoring modules 6 of the upstream station through photodiodes of the photoelectric monitoring modules and amplifying the electric signals, and collecting the electric signals and transmitting the electric signals to a main station by a singlechip 7 (raspberry group).

The photoelectric monitoring module mainly converts an optical signal into an electric signal through a photodiode, the generated weak current is amplified to a detectable 3.3V level through a voltage amplifying circuit of the photoelectric monitoring module, the voltage amplifying circuit is shown IN figure 3, an IN port receives the weak current generated by the photodiode, an OUT port outputs the amplified voltage to a single chip microcomputer 7, 8 voltage amplifying circuits shown IN figure 3 are arranged IN 8 photoelectric monitoring modules 6 of an upstream site, the internal structure of the photoelectric monitoring module is shown IN figure 4, 8 optical signals of idle fiber cores are connected into the 8 photoelectric monitoring modules 6, the photodiode converts the optical signals into the electric signal, the electric signal is amplified to 3.3V by the voltage amplifying circuits respectively, and the electric signal is output to a raspberry for collection. If the vacant fiber cores run normally, the monitoring light path is smooth in transmission, the main station end receives signals that the vacant fiber cores are normal, if the vacant fiber cores are interrupted, the upstream station cannot receive light signals transmitted by the downstream station, the main station end receives signals that a certain vacant fiber core is interrupted, and the electric power communication operation and maintenance personnel arrange follow-up optical cable operation and maintenance work according to actual conditions.

Spare fiber core switching part:

connecting light emitting ports (OUT) of interconnected optical ports of optical transmission equipment of upstream and downstream sites with 1/2 optical splitters 1 respectively, and uniformly distributing and sending OUT sent optical signals, wherein the OUT ports of the optical transmission equipment of the downstream sites are connected to an ODF (optical fiber distribution frame) of a 12-core power optical cable, a 1 st core is used for primary use, and a 7 th core is used for standby use; the 2 nd core of the upstream station is used as a main core, and the 8 th core is used as a standby core. The light receiving ports (IN) are different, and IN an upstream station, the 1 st core and the 7 th core are connected into a 2-to-1 optical switch 4, and the singlechip is used for controlling voltage to selectively receive optical signals. The 1-from-2 optical switch 4 is controlled by voltage, the control singlechip 7 is connected with a pin of the 1-from-2 optical switch 4, the 1-from-2 optical switch 4 selectively receives an optical signal of a 1 st core when outputting low level, and the 1-from-2 optical switch 4 selectively receives an optical signal of a 7 th core when outputting high level;

and a downstream station selects an optical signal to be received in an automatic mode, an active 2 nd core is connected to 1/2 uneven splitter 3, 80% of the optical signal is used for optical signal transmission and is sent to the 2-to-1 optical switch 4, and the other port of the 2-to-1 optical switch 4 is connected to a spare 8 th core optical fiber. In addition, 20% of the signals are used for monitoring the main optical path, if the 2 nd core optical fiber used by the main optical path is interrupted, the level signal generated by the downstream station photoelectric monitoring module 5 is interrupted, so that the 2-to-1 optical switch 4 is switched, and the standby 8 th core optical fiber is used for receiving the optical signal.

The structure of the 1-path photoelectric monitoring module 5 at the downstream site is shown IN fig. 5, a photodiode receives 20% of optical signals coming OUT of the non-uniform splitter 3 at the downstream site 1/2, converts the optical signals into electric signals, and inputs the electric signals into a voltage amplifying circuit, wherein the voltage amplifying circuit is formed by a circuit shown IN fig. 3, the circuit has the function of amplifying weak electric signal voltage to electric signals of 3.3V voltage which can be monitored, the electric signals output by the photoelectric monitoring module are only IN microampere level, the positive and negative electrodes of the electric signals are connected into IN + and IN-, and C1 and R2 of the circuit for input filtering and interference filtering, a negative feedback circuit is formed by an operational amplifier OPA2227P, R1 and C2, the input voltage is amplified by 10000000 times, and the electric signals are controlled to be output from an OUT port at about 3.3V by a voltage stabilizing circuit formed by the subsequent R3, C3 and D2.

The 1-channel photoelectric monitoring module 5 monitors 20% of optical signals of the 2 nd core of the optical cable, which are split by the uneven splitter 3 at the downstream site 1/2, when the 2 nd core of the optical cable has an optical signal, the 1-channel photoelectric monitoring module 5 outputs a high level to the 2-to-1 optical switch 4, and at this time, the 2-to-1 optical switch 4 selectively receives 1/2% of optical signals of the 2 nd core of the optical cable, which are split by the uneven splitter 3; if the optical signal of the 2 nd core of the optical cable is interrupted, the 1-channel photoelectric monitoring module 5 outputs low level to the 2-to-1 optical switch 4, and the 2-to-1 optical switch 4 selects to receive the optical signal of the 8 th core of the optical cable. The reason why the downstream site automatically controls the optical switch 4 from 1 to 2 to realize automatic switching in the manner is that after the interruption of the primary optical path (optical cable core 2), we cannot get in contact with the downstream site equipment (the optical switch 4 from 1 to 2 of the downstream site cannot be controlled by using an internal private network remote control method), so the structure is designed to allow the receiving side of the downstream site to automatically switch to the standby optical path (optical cable core 8).

The singlechip control part:

the single chip microcomputer 7 is deployed at an upstream site by adopting a raspberry pi (raspberry pi) 3B model, is small in size and low in energy consumption, is in butt joint with optical transmission equipment by utilizing an RJ45 Ethernet interface of the raspberry pi, and is connected with a network private line to a master station end, and an electric power communication operation and maintenance worker can operate the raspberry pi by remotely logging in the raspberry pi in an SSH mode after accessing a notebook computer at the master station end so as to complete the actions of monitoring the on-off of an idle fiber core and switching a standby fiber core.

Examples of the applications

Use the utility model discloses the application is on 35kV and following voltage class's branch line website optical cable, like figure 6, 35kV transformer substation B branch line inserts 110kV transformer substation A, regards 110kV transformer substation A as the upstream station, and 35kV transformer substation B regards as the downstream station. A light path of regional network optical transmission equipment runs on optical cables of 35kV transformer substations B to 110kV transformer substation A, an Ethernet special line is opened to a main station end by the optical transmission equipment of the 110kV transformer substation A, the raspberry pie is connected to an RJ45 net port, and a notebook computer can be used for remotely logging in the raspberry pie to operate at the main station end. A spare optical port is opened on optical transmission equipment of a 35kV transformer substation B to be connected into an 1/8 optical splitter, 8-core spare fiber cores are connected into the optical splitter, and the 8-core optical fibers are connected into 8 paths of photoelectric monitoring modules 6 of an upstream station on an ODF optical distribution frame of a 110kV transformer substation A. After logging in the raspberry group of the 110kV transformer substation A device, the light receiving information of 8 light ports can be displayed, when the optical cable is normal, the 8 cores are displayed to be smooth, after interruption occurs in the 8 cores, the level of the corresponding pin of the photoelectric monitoring module is 0, the raspberry group returns fiber core interruption information, and communication operation and maintenance personnel can arrange plan work in advance to eliminate the defects of the optical cable through the core interruption condition.

In addition, a 2-core spare fiber core (a 7 th core and an 8 th core) is selected to be connected to devices on two sides, in a 35kV transformer substation B, the 7 th core serving as a sending end of a spare light path is connected to an 1/2 optical splitter 1 of a downstream station, and the 8 th core serving as a receiving end of the spare light path is connected to a 1-out-of-2 optical switch 4 of the downstream station; in the 110kV substation a, the 7 th core is connected to the optical switch 4 of 1-from-2 at the upstream site as the receiving end of the backup optical path, and the 8 th core is connected to the 1/2 splitter 1 at the upstream site as the transmitting end of the backup optical path. If the optical path is interrupted, the optical transmission equipment of the 35kV transformer substation B displays pipe disconnection on the network management of the main station end, the service of the station is interrupted, at this time, the 1-path photoelectric monitoring module 5 on the B side of the 35kV transformer substation detects that no optical signal exists in the used fiber core, the 1-from-2 optical switch 4 of the downstream station is switched, the optical path of the B side of the 35kV transformer substation is switched to the standby fiber core, at this time, the raspberry of the 110kV transformer substation A device logs in to control the 1-from-2 optical switch 4 of the upstream station on the A side of the 110kV transformer substation to switch to the standby fiber core, so that the optical paths are all switched to operate on the good standby fiber core, the optical path is recovered, and the service of the 35.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (6)

1. Terminal optical cable remote monitoring device of electric power optical transmission network, its characterized in that:

in a downstream station, light emitted by one optical port of optical transmission equipment is connected with a plurality of idle fiber cores in an optical fiber distribution frame of a multi-core optical cable by using an optical splitter, optical signals are transmitted to the optical fiber distribution frame of the multi-core optical cable corresponding to an upstream station and enter an optoelectronic monitoring module, the optoelectronic monitoring module of the upstream station converts the optical signals into electrical signals through a photodiode of the optoelectronic monitoring module and amplifies the electrical signals, and a single chip microcomputer collects the electrical signals and transmits the electrical signals to a main station end;

connecting the light emitting ports of the interconnected optical ports of the optical transmission equipment of the upstream site and the optical transmission equipment of the downstream site with an 1/2 optical splitter respectively, and uniformly distributing and sending out the sent optical signals, wherein the light emitting ports of the optical transmission equipment of the downstream site are accessed to the optical fiber distribution frame of the multi-core optical cable in the downstream site, and the light emitting ports of the optical transmission equipment of the upstream site are accessed to the optical fiber distribution frame of the corresponding multi-core optical cable in the upstream site;

in an upstream site, two fiber cores connected with a light emitting port of optical transmission equipment corresponding to the downstream site are connected into a 2-to-1 optical switch, and the voltage of the single chip microcomputer is used for controlling the 2-to-1 optical switch to selectively receive optical signals;

at a downstream station, connecting 1/2 one of two fiber cores connected with a light emitting port of an optical transmission device corresponding to an upstream station into an uneven splitter, respectively connecting two ports of 1/2 uneven splitter with a 1-path photoelectric monitoring module and a 2-to-1 optical switch of the downstream station, and connecting the other of the two fiber cores connected with the light emitting port of the optical transmission device corresponding to the upstream station into the 2-to-1 optical switch; the photoelectric monitoring module is connected with the optical switch of 1-out-of-2, and the voltage of the photoelectric monitoring module is utilized to control the optical switch of 1-out-of-2 to select to receive optical signals.

2. An optical cable remote monitoring device at the end of an electric power optical transmission network according to claim 1, characterized in that: the downstream station apparatus connects the light emitted from one optical port of the optical transmission equipment to the spare 8 cores of the optical distribution frame of the 12-core optical cable by using the 1/8 optical splitter.

3. An optical cable remote monitoring device at the end of an electric power optical transmission network according to claim 1, characterized in that: the photo-monitoring module amplifies the current generated by its photodiode to a 3.3V level.

4. An optical cable remote monitoring device at the end of an electric power optical transmission network according to claim 1, characterized in that: one of two fiber cores connected with a light emitting port of the optical transmission equipment corresponding to the upstream station is connected into 1/2 uneven splitter, 80% of the two fiber cores are used for optical signal transmission and sent into a 2-to-1 optical switch.

5. An optical cable remote monitoring device at the end of an electric power optical transmission network according to claim 1, characterized in that: the singlechip adopts a raspberry type 3B.

6. An optical cable remote monitoring device at the end of an electric power optical transmission network according to claim 1, characterized in that: the RJ45 Ethernet interface of the single chip microcomputer is in butt joint with the optical transmission equipment and is connected with the main station end through a network special line.

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