阅读说明：本技术 电力光传输网络末端的光缆远程监测装置及方法 (Optical cable remote monitoring device and method at tail end of power optical transmission network ) 是由 蔡澔伦 朱晓红 吴尧 张智伟 彭雅昕 牛乙羊 刘燊 李腾 刘海钢 张光莹 吴封赛 于 2020-06-09 设计创作，主要内容包括：本发明涉及一种电力光传输网络末端的光缆远程监测装置及方法,属于电力通信光缆远程监测技术领域。本发明在下游站点中,将光传输设备其中的一个光口发出的光利用光分器连接多芯光缆的光纤配线架其中空闲的多根纤芯,将光信号传输至上游站点相应的多芯光缆的光纤配线架并进入光电监测模块,上游站点的光电监测模块通过其光电二极管将光信号转换为电信号并进行放大,单片机将采集这些电信号并传送至主站端。本发明能够通过定期监测提前预防光缆中断造成的电力生产实时业务中断,使得电力通信网络运行的安全性大大提高。在用光缆断芯情况下还能够远程调芯至备用纤芯使用,降低了通信运维人员和变电站值守人员的出差率,节约了人力和财力。(The invention relates to an optical cable remote monitoring device and method at the tail end of an electric power optical transmission network, and belongs to the technical field of electric power communication optical cable remote monitoring. In the downstream station, the light emitted from one light port of the optical transmission equipment is connected with a plurality of idle fiber cores in the optical fiber distribution frame of the multi-core optical cable by using the optical splitter, the optical signals are transmitted to the optical fiber distribution frame of the multi-core optical cable corresponding to the upstream station and enter the photoelectric monitoring module, the photoelectric monitoring module of the upstream station converts the optical signals into electric signals through the photodiode of the photoelectric monitoring module and amplifies the electric signals, and the singlechip acquires the electric signals and transmits the electric signals to the main station. The invention can prevent the real-time service interruption of power production caused by the interruption of the optical cable in advance through regular monitoring, so that the running safety of the power communication network is greatly improved. 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.)

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 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.

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.

7. The method for remotely monitoring the optical cable at the tail end of the power optical transmission network adopts the device for remotely monitoring the optical cable at the tail end of the power optical transmission network as claimed in any one of claims 1 to 6, and is characterized by comprising 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.

Technical Field

The invention belongs to the technical field of remote monitoring of power communication optical cables, and particularly relates to a remote optical cable monitoring device and method at the tail end of a 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.

Disclosure of Invention

The invention aims to solve the defects of the prior art and provides a device and a method for remotely monitoring an optical cable at the tail end of an electric power optical transmission network.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

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.

The invention also provides a method for remotely monitoring the optical cable at the tail end of the power optical transmission network, which adopts the device for remotely monitoring the optical cable 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.

In the upstream station, the singlechip is used for monitoring, controlling and adjusting the core and carrying out remote communication.

In the downstream station of the present invention, the 1/2 non-uniform splitter extracts 20% of the optical signal as a method for in-use optical path monitoring.

On one hand, the invention remotely monitors whether the idle fiber core of the power optical cable is interrupted or not at a certain time artificially (preferably, the idle fiber core is monitored once every month artificially), and selects a group of standby fiber cores in the idle optical cable for remote core adjustment, and if the optical path is interrupted, the core adjustment can be carried out for short-time service recovery. 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 invention starts from the actual situation of the terminal node of the power optical cable network, only needs to monitor the on-off of the idle fiber core, and does not need to integrate the OTDR module, thereby greatly reducing the equipment cost. In addition, the invention can be monitored and controlled by logging in the singlechip remotely, and the singlechip at the far end of the transformer substation is communicated with the master station end by utilizing the mode that the optical transmission equipment opens a special network line at an optical cable upstream station, so that the equipment is prevented from being interconnected by using an uncontrollable public network, networking is carried out by adopting a physical isolation mode, and the network safety is improved.

The invention can select 1/2 uneven splitters with different proportions according to actual situations, as long as the split used for optical signal transmission meets the optical power required by the service, for example, 70% and 30%.

The invention can detect the idle fiber core only by using a computer remote login device at the master station end without the need of on-site optical cable idle fiber core interruption detection on business trip. 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 invention has the beneficial effects that:

the invention starts from the reality of the operation and maintenance condition of the power optical cable, the optical cable remote monitoring device at the tail end of the power optical transmission network is deployed on the star-shaped tail end station of the power optical cable network, communication operation and maintenance personnel can remotely test the optical cable at the master station end, so that the scheduled inspection efficiency of the power optical cable is improved, and the original annual station-to-station detection is changed into monthly remote detection, so that the power communication operation and maintenance personnel can more clearly master the operation condition of the optical cable at the tail end of the power optical cable, and the real-time service interruption of power production caused by the optical cable interruption can be prevented in advance through regular monitoring, so that the operation safety of the power communication network is greatly improved. 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 used in the description of the embodiments or the prior art will be briefly described below, and 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 creative efforts.

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 apparatus structure 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 examples do not specify particular techniques or conditions, and are performed according to the techniques or conditions described in the literature in the art or according to the product specifications. The materials or equipment used are not indicated by manufacturers, and all are conventional products available by purchase.

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 in describing and simplifying the 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 invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "provided" are to be construed broadly, e.g., as being 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 meanings of the above terms in the present invention are understood according to specific situations.

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.