Fiber channel monitoring device, fiber channel monitoring system and monitoring method

Abstract

The invention belongs to the technical field of optical fiber communication of power system protection devices, and provides an optical fiber channel monitoring device, an optical fiber channel monitoring system and an optical fiber channel monitoring method. The monitoring device provided by the invention belongs to a welding device with a built-in optical fiber channel on-line monitoring function, a protection optical fiber welding function module and an optical fiber channel on-line monitoring function module are integrated, no additional discrete components are added, the optical fiber breakpoint risk is reduced, and the monitoring device has the characteristics of light weight and integration. In addition, the device can carry out power compensation on optical signals, and the problem of weak long-distance transmission optical signals is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical fiber communication technology for power system protection devices, and in particular to an optical fiber channel monitoring device, an optical fiber channel monitoring system and a monitoring method. BACKGROUND

[0002] The optical fiber channel between the relay protection devices of a substation is the infrastructure for building a power grid security defense system. Through the optical fiber channel, protection signals such as fault direction and tripping commands are transmitted in real time between the protection devices, realizing the coordinated action of the protection devices at both ends of the power line. Its stability and bandwidth advantage is a key factor to ensure the reliable action of the pilot differential protection. The current optical fiber channel of the relay protection device of the substation is mainly in the form of 2M multiplexing or dedicated fiber core, and the maintenance responsibility of the optical fiber channel is usually clearly divided at the in-station optical fiber fusion box. Among them, as shown in the optical fiber fusion box on the side and the opposite side, the related departments of the signal and communication profession are responsible, and the internal optical fiber of the fusion box is responsible by the protection profession. Figure 1

[0003] At the initial stage of the construction of the optical fiber channel, its performance can meet the use requirements, but with the increase of use time and the influence of factors such as the link distance of the optical fiber line on both sides, the optical fiber fusion process, and the environment, it may cause problems such as increased optical loss, unstable or interrupted optical fiber communication. In addition, in the case of optical fiber failure, the traditional detection method of the existing technology is usually to use an optical time domain reflectometer for monitoring on site. However, due to the various forms of protection optical fiber links, the traditional method cannot monitor and quickly identify the optical fiber fault interval, resulting in an unclear fault responsibility interval, which makes the cooperation between professional departments complex, seriously affects the troubleshooting efficiency, and may further affect the safety of the power grid. SUMMARY

[0004] The present application provides an optical fiber channel monitoring device, an optical fiber channel monitoring system and a monitoring method, aiming to solve the technical problem that the optical fiber channel in the prior art has a large loss and it is difficult to locate the optical fiber fault, thereby realizing real-time monitoring, power loss compensation and fault interval determination of the optical fiber channel.

[0005] In a first aspect, the embodiments of the present application provide an optical fiber channel monitoring device, which comprises a fusion cabin 01, a sensing cabin 02 and a tail fiber; the fusion cabin 01 is used to support the fusion of the tail fiber and an external optical fiber, forming an optical fiber channel; the tail fiber is used to connect the corresponding relay protection device of the monitoring device, and the external optical fiber is used to connect the opposite monitoring device; the optical fiber channel is used to transmit protection signals between adjacent relay protection devices in a substation;

[0006] The sensing cabin 02 is configured to realize the function of optical power loss compensation;

[0007] ​The sensing cabin 02 includes at least a beam splitter module 21, a signal amplifier 22, a signal monitoring module 23, a communication module 24, a power supply module 25, and the pigtail.

[0008] The sensing chamber 02 is also configured to monitor the fiber optic signal of the fiber optic channel in real time and transmit the obtained fiber optic channel monitoring results to the online monitoring device in real time through the signal communication module 24; wherein the sensing chamber 02 maintains a communication connection with the online monitoring device through the communication module 24.

[0009] The optical splitting module 21 is used to separate the optical signal in the optical fiber channel to obtain a service branch and a monitoring branch. The service branch compensates for the attenuation of the optical signal through the signal amplifier 22. When the optical signal in the service branch passes through the signal amplifier 22, the fiber core of the service branch is connected to the optical fiber interface of the relay protection device through the tail jumper connector.

[0010] The monitoring branch couples its optical signal to the signal monitoring module 23, which identifies in real time whether there is a signal input or output in the optical fiber channel, and transmits the obtained optical fiber channel monitoring results to the online monitoring equipment in real time through the signal communication module 24.

[0011] The power module 25 is configured to continuously provide power to the device in the event of an external power outage.

[0012] The beneficial effects of the first aspect of this invention are as follows: The fiber optic channel monitoring device provided in this application can replace conventional fiber optic fusion splice boxes. That is, the monitoring device provided in this application is a fusion splice device with built-in online monitoring function for fiber optic channels, integrating fiber optic splice protection and online monitoring modules into one, without adding additional discrete components, reducing the risk of fiber breakage, and featuring lightweight integration. Furthermore, this device can perform power compensation for optical signals, solving the problem of weak optical signals during long-distance transmission.

[0013] Secondly, this application also proposes a fiber optic channel monitoring system, the system comprising online monitoring equipment, network communication equipment, and n monitoring devices for fiber optic channels as described in the first aspect in a substation; n is a positive integer;

[0014] The various relay protection devices in the substation transmit protection signals through optical fiber channels. Each relay protection device in the substation is equipped with a monitoring device as described in the first aspect. The monitoring devices of two adjacent relay protection devices are connected through optical fiber channels to form a local monitoring device and a counterpart monitoring device.

[0015] The online monitoring device is used to obtain the fiber optic channel monitoring results reported by n monitoring devices through the network communication device.

[0016] The local monitoring device is used to determine the fault range inside and outside the optical fiber channel connected to the local monitoring device by combining the signal on / off status of the local relay protection device and / or the discrimination result of the optical fiber channel of the opposite monitoring device, and to generate the optical fiber channel monitoring result; the local relay protection device is the relay protection device connected to the local monitoring device.

[0017] In one embodiment, the monitoring device further includes a fault indication module;

[0018] The fault indication module is used to display the fault range of the optical fiber channel.

[0019] In one embodiment, the system is used to monitor m substations, and the online monitoring equipment is used to acquire the fiber optic channel monitoring results reported by n monitoring devices in each of the m substations; m is a positive integer.

[0020] The beneficial effects of the second aspect of the present invention are as follows: The fiber channel monitoring system provided in this application supports the access of multiple monitoring devices (i.e., fusion splicing devices with built-in fiber channel online monitoring function), unifies the management of the detection data of all monitoring devices, supports users to grasp the operating status of the system and fiber channel, and provides a visual management and analysis function based on the server.

[0021] Thirdly, this application also provides a method for monitoring a fiber optic channel, the monitoring method being applied to the fiber optic channel monitoring system described in the second aspect above, the method comprising:

[0022] The local monitoring device collects the signal on / off status of the local relay protection device; the local relay protection device is the relay protection device connected to the local monitoring device;

[0023] The local monitoring device acquires the discrimination results of the optical fiber channel of the remote monitoring device;

[0024] The local monitoring device determines the fault range inside and outside the optical fiber channel connected to the local monitoring device based on the signal on / off status and / or the discrimination result of the optical fiber channel of the remote monitoring device, and generates optical fiber channel monitoring results.

[0025] The local monitoring device reports the monitoring results of the fiber optic channel to the online monitoring equipment.

[0026] In one embodiment, the step of determining the fault range inside and outside the optical fiber channel connected to the local monitoring device includes:

[0027] If the signal monitoring module of the local monitoring device does not detect a real-time signal in the monitoring branch of its transmitting optical fiber, it indicates that there is an interruption in the optical fiber channel of the local monitoring device, and the fault area is located in the internal optical fiber of the local monitoring device.

[0028] In one embodiment, the step of determining the fault range inside and outside the optical fiber channel connected to the local monitoring device includes:

[0029] If the signal monitoring module of the local monitoring device detects a real-time signal in the monitoring branch of its transmitting optical fiber, it indicates that the internal optical fiber of the local monitoring device is normal. If the signal monitoring module of the opposite monitoring device detects a real-time signal in the optical fiber branch of its transmitting optical fiber, it indicates that the external optical fiber channel is normal. If the signal reception of the opposite relay protection device is abnormal under these circumstances, it is determined that the internal optical fiber channel of the opposite monitoring device is faulty.

[0030] In one embodiment, the step of determining the fault range inside and outside the optical fiber channel connected to the local monitoring device includes:

[0031] If the signal monitoring module of the local monitoring device does not detect a real-time signal in the monitoring branch of its receiving optical fiber, it indicates that there is an interruption in the optical fiber passage, and the fault range is the external optical fiber or the internal optical fiber of the opposite monitoring device.

[0032] If the signal monitoring module of the opposite monitoring device detects a real-time signal in the fiber optic branch of its transmitting fiber, it indicates that the internal fiber of the opposite monitoring device is normal and the faulty section is the external fiber; if the signal monitoring module of the opposite monitoring device does not detect a real-time signal in the fiber optic branch of its transmitting fiber, it indicates that the faulty section is the internal fiber of the opposite monitoring device.

[0033] In one embodiment, the step of determining the fault range inside and outside the optical fiber channel connected to the local monitoring device includes:

[0034] If the signal monitoring module of the local monitoring device detects a real-time signal in the monitoring branch of its receiving optical fiber, it indicates that the external optical fiber and the internal optical fiber of the opposite monitoring device are normal; and if the signal reception of the local relay protection device is abnormal, it is determined that there is a fault in the internal optical fiber channel of the local monitoring device.

[0035] The beneficial effects of the third aspect of this invention are as follows: Firstly, the optical fiber channel status monitoring method of this application can realize the function of protecting the optical cable channel: real-time monitoring of the signal status in the protection channel monitored by multiple devices in each site, and supporting the identification of optical cable fault sections. This ensures stable transmission and effective monitoring of optical fiber signals. Secondly, the optical fiber channel status monitoring method of this application can realize the function of locating optical cable channel fault sections: through the analytical judgment capability of the monitoring system, the fault responsibility section can be quickly identified. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the existing technology for connecting the fiber optic channel for protection on the opposite side;

[0038] Figure 2 This is a schematic diagram of an embodiment of the fiber optic channel monitoring device provided in this application;

[0039] Figure 3 This is a schematic diagram of an embodiment of another monitoring device for the fiber optic channel provided in this application;

[0040] Figure 4 This is a schematic diagram of a network topology embodiment of the fiber optic channel monitoring system provided in this application;

[0041] Figure 5 This is a schematic diagram of the monitoring principle of the fiber optic channel monitoring device provided in this application;

[0042] Figure 6 This is a schematic flowchart of the main embodiments of the fiber optic channel monitoring method provided in this application. Detailed Implementation

[0043] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0044] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0045] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0046] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."

[0047] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0048] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0049] To address the problems mentioned in the background art regarding increased loss, communication interruption, and difficulty in identifying fault zones that may occur when protecting optical fibers, this invention proposes a monitoring device, a monitoring system, and a monitoring method for optical fiber channels; such as Figure 2 The diagram shown is a schematic representation of an embodiment of the fiber optic channel monitoring device provided in this application. This application utilizes... Figure 2 The fiber optic channel monitoring device shown in this embodiment is superior to existing technologies. Figure 1Each fiber optic fusion splice box in the substation is replaced, thereby upgrading each original fiber optic fusion splice box to a fiber optic fusion device with built-in online monitoring function. This application ensures the safe and stable operation of each relay protection device in the substation through a lightweight and intelligent monitoring device. The technical content to be protected by this application is illustrated below through specific embodiments:

[0050] First, refer to Figure 2 In a first aspect, this application provides a monitoring device for an optical fiber channel, the device comprising a fusion splice compartment 01, a sensing compartment 02, and a pigtail; the fusion splice compartment 01 is used to support the fusion splicing of the pigtail and an external optical fiber to form an optical fiber channel; as... Figure 2 As shown, Figure 2 The yellow optical fiber in the middle is a pigtail, which is used to connect to the relay protection device corresponding to the monitoring device. Figure 2 The red optical fiber in the middle is the external optical fiber, which is used to connect to the monitoring device on the other side; the optical fiber channel is used to transmit protection signals between adjacent relay protection devices in the substation.

[0051] The sensing cabin 02 includes at least a beam splitter module 21, a signal amplifier 22, a signal monitoring module 23, a communication module 24, a power supply module 25, a fault indication module 26, and the aforementioned pigtail.

[0052] Understandably, the pigtail is fused with an external optical fiber to form an optical fiber channel. The relay protection devices within the substation can transmit protection signals through this optical fiber channel, enabling coordinated operation of the protection devices at both ends of the power line. Figure 3 As shown, the sensing compartment 02 of each monitoring device in this embodiment can provide two sets of optical fiber channels to meet the main and backup requirements. Each set of optical fiber channels includes two optical fiber cores: a receiving fiber core and a transmitting fiber core.

[0053] First, the sensing chamber 02 of the device in this embodiment can realize the optical power attenuation compensation function;

[0054] Secondly, the sensing cabin 02 of this embodiment can also communicate with the online monitoring equipment through the communication module 24. Therefore, the sensing cabin 02 can upload the real-time monitoring of the fiber optic channel to the online monitoring equipment in real time. The online monitoring equipment is located on the user side, so the staff can understand the current status of the fiber optic channel in real time from the online monitoring equipment.

[0055] For example, refer to Figure 2 In this embodiment, the optical splitting module 21 is used to separate the optical signal in the optical fiber channel to obtain two splits: a first optical fiber split (service split) and a second optical fiber split (monitoring split);

[0056] Among them (corresponding to the sensing cabin 02 which can realize the optical power attenuation compensation function), the first optical fiber branch is the branch with more optical signals and continues to undertake the data transmission function of the protection channel, which is called the service branch. The attenuated optical signal is compensated by the signal amplifier 22 (in this embodiment, considering that the distance between the transmitting fiber core in the channel and the signal source is relatively close, the loss can be ignored, and only the receiving fiber core in the channel needs to be compensated). After the optical signal on the service branch passes through the signal amplifier 22, the fiber core of the service branch is connected to the optical fiber interface of the relay protection device through the tail jumper connector.

[0057] In addition (corresponding to the real-time monitoring of the fiber optic signal of the sensing cabin), the second fiber optic branch is a fiber optic branch with less optical signal, called the monitoring branch. The monitoring branch couples its optical signal to the signal monitoring module 23, which identifies in real time whether there is a signal input or signal output in the fiber optic channel, and uploads the identification result to the online monitoring device in real time through the signal communication module 24.

[0058] The power module 25 is configured to continuously provide power to the device in the event of an external power outage. That is, during operation of the device in this embodiment of the application, the power module can continuously supply power to the fiber optic channel monitoring device even in the event of an external power outage.

[0059] The fiber optic channel monitoring device provided in this application can replace conventional fiber optic fusion splice boxes. That is, the monitoring device provided in this application is a fusion splice device with built-in online monitoring function for fiber optic channels, integrating fiber optic splice protection and online monitoring modules into one, without adding additional discrete components, reducing the risk of fiber breakage, and featuring lightweight integration. Furthermore, this device can perform power compensation for optical signals, solving the problem of weak optical signals in long-distance transmission. At the same time, the device has a built-in power module, effectively avoiding the problem of the device malfunctioning due to unplanned power outages.

[0060] Accordingly, refer to Figure 4 Secondly, embodiments of this application also provide a fiber optic channel monitoring system, the system comprising online monitoring equipment, network communication equipment, and n monitoring devices in a substation;

[0061] As described in the first aspect of the embodiment above, protection signals are transmitted between various relay protection devices in the substation via optical fiber channels, and each relay protection device in the substation is configured to be connected to a monitoring device as described in the first aspect of the embodiment above; the monitoring devices of two adjacent relay protection devices are connected to each other via optical fiber channels to form a local monitoring device and a counterpart monitoring device;

[0062] The online monitoring device is used to obtain the fiber optic channel monitoring results reported by these n monitoring devices through the network communication device.

[0063] In this embodiment, the local monitoring device is used to combine the signal on / off status of the local relay protection device (the relay protection device connected to the local monitoring device) and the discrimination result of the optical fiber channel of the opposite monitoring device to determine the fault range inside and outside the optical fiber channel connected to the local monitoring device, and generate the optical fiber channel monitoring result.

[0064] For example, the fiber optic channel monitoring system of this application can consist of a server and monitoring software. The monitoring system of this application can communicate with the fiber optic channel monitoring device of the first aspect of this application via common network transmission devices and network transmission channels such as gateways, switches, and routers. It can receive the on / off status of the corresponding monitored and protected fiber optic channels from multiple (i.e., n) monitoring devices in real time, thereby analyzing the location of the fiber optic fault and issuing alarms through the human-machine interface of the monitoring software on the online monitoring device. This achieves centralized management and maintenance of the on / off status of multiple substation protected fiber optic channels and the fault responsibility area.

[0065] For example, such as Figure 3 As shown, the monitoring device also includes a fault indication module 26, used to display the fault range of the faulty fiber optic channel. For example, when an interruption in the fiber optic signal or an attenuation exceeding a set threshold is detected, an alarm is immediately issued; the monitoring system receives alarm information from the device in real time and alerts maintenance personnel through a human-machine interface for further analysis and processing.

[0066] In addition, such as Figure 4 As illustrated, the fiber optic channel monitoring system of this application can also monitor each monitoring device in m substations, that is, acquire the fiber optic channel monitoring results reported by n monitoring devices in each of the m substations. This allows for real-time monitoring of the signal status in the protection channels monitored by multiple monitoring devices within each substation, and supports the identification of fiber optic cable fault zones; it can ensure the stable transmission and effective monitoring of fiber optic signals for large-scale power grid equipment.

[0067] The fiber channel monitoring system provided in this application supports the connection of multiple monitoring devices (i.e., fusion splicing devices with built-in fiber channel online monitoring functions), unifies the monitoring data of all monitoring devices, allows users to grasp the operating status of the system and fiber channel, and provides visual management and analysis functions based on the server.

[0068] Furthermore, in a third aspect, embodiments of this application also provide a fiber optic channel monitoring method, wherein the monitoring method of this embodiment is applied to the fiber optic channel monitoring system as described in the second aspect above; correspondingly, asFigure 5 As shown, Figure 5 A schematic diagram of the monitoring principle of the fiber optic channel monitoring device as described in the first aspect above is shown.

[0069] The monitoring method in this embodiment is implemented by the fiber optic channel monitoring device described in the first aspect, with reference to... Figure 6 The fiber optic channel monitoring method includes:

[0070] Step S1: The local monitoring device collects the signal on / off status of the local relay protection device;

[0071] Step S2: The local monitoring device acquires the discrimination result of the fiber optic channel of the remote monitoring device;

[0072] Step S3: Based on the signal on / off status and / or the discrimination result of the optical fiber channel of the monitoring device on the other side, the local monitoring device judges the fault range inside and outside the optical fiber channel connected to the local monitoring device and generates optical fiber channel monitoring results.

[0073] Step S4: The local monitoring device reports the monitoring results of the fiber optic channel to the online monitoring equipment.

[0074] It should be noted that the fiber optic channel monitoring method in this embodiment can be derived from... Figure 1 The fiber channel monitoring device shown is implemented; for example, the implementation of the monitoring method by the fiber channel monitoring device may rely on hardware logic circuitry.

[0075] In this embodiment, each fiber optic channel monitoring device of this application can independently determine the partial interruption of the protected fiber optic cable at its own station. Simultaneously, the local monitoring device (i.e., the local monitoring device) can combine the determination results of the opposing fiber optic channel monitoring device (i.e., the opposing monitoring device) with the signal continuity status of the relay protection device itself to accurately determine the fault range inside and outside the entire fiber optic channel. Furthermore, the local monitoring device can also issue a local alarm by illuminating the corresponding fault indicator light. The specific determination logic is as follows (assuming that the optical signal transmission and reception functions of the relay protection devices at both ends of the fiber optic channel are normal):

[0076] If the signal monitoring module of the local monitoring device does not detect a real-time signal in the monitoring branch of its transmitting optical fiber, it indicates that there is an interruption in the optical fiber channel of the local monitoring device, and the faulty section is the internal optical fiber of the local monitoring device. Since the transmitting optical fiber of the local monitoring device is the receiving optical fiber of the other monitoring device, it is obvious that the signal monitoring module of the other monitoring device cannot detect a real-time signal in the corresponding optical fiber branch.

[0077] If the signal monitoring module of the local monitoring device detects a real-time signal in the monitoring branch of its transmitting optical fiber, it indicates that the internal optical fiber of the local monitoring device is normal. Since the transmitting optical fiber of the local monitoring device is the receiving optical fiber of the monitoring device on the other side, if the signal monitoring module of the monitoring device on the other side detects a real-time signal in the optical fiber branch of its transmitting optical fiber, it indicates that the external optical fiber channel is normal. If the signal reception of the protection device on the other side is abnormal at this time, it can also reflect the fault of the internal optical fiber channel on the other side.

[0078] If the signal monitoring module of the local monitoring device does not detect a real-time signal in the monitoring branch of its receiving optical fiber, it indicates that there is an interruption in the optical fiber transmission, and the faulty section is either the external optical fiber or the internal optical fiber of the monitoring device on the other side. Since the receiving optical fiber of the local monitoring device is the transmitting optical fiber of the monitoring device on the other side, if the signal monitoring module of the monitoring device on the other side detects a real-time signal in the optical fiber branch of its transmitting optical fiber, it indicates that the internal optical fiber of the monitoring device on the other side is normal, and the faulty section is only the external optical fiber. If the signal monitoring module of the monitoring device on the other side does not detect a real-time signal in the optical fiber branch of its transmitting optical fiber, it indicates that the faulty section must be the internal optical fiber of the monitoring device on the other side.

[0079] If the signal monitoring module of the local monitoring device detects a real-time signal in the monitoring branch of its receiving optical fiber, it indicates that the external optical fiber and the internal optical fiber of the monitoring device on the other side are normal. If the signal reception of the local relay protection device is abnormal at this time, it can also indicate that there is a fault in the internal optical fiber channel of the local monitoring device.

[0080] The technical advantages of the fiber optic channel monitoring method in this application are as follows:

[0081] (1) Fiber optic cable channel monitoring function: Real-time monitoring of signal status in protection channels monitored by multiple devices in each site, and support for identifying fiber optic cable fault sections. Ensuring stable transmission and effective monitoring of fiber optic signals;

[0082] (2) Achieve fault location function for optical cable channels: Through the analysis and judgment capabilities of the monitoring system, quickly identify the fault responsibility area:

[0083] Single-sided fault location: Single-sided status can determine the fault range of the optical cable channel inside / outside the cabinet;

[0084] Joint fault location from both sides: Joint analysis from both sides can comprehensively determine whether the fault responsibility area of ​​the fiber optic channel is in the protection / communication field.

[0085] In one embodiment, the fiber optic channel monitoring method of this application can be derived from... Figure 1 The signal monitoring module 23 of the fiber optic channel monitoring device shown is implemented;

[0086] For example, this signal monitoring module 23 can be a hardware logic circuit, which may include a hardware module based on photoelectric detection and comparator circuitry. Its function is to implement simple "present / absent" signal determination through hardware circuitry, for example:

[0087] A photodiode is used to convert light signals into electrical signals.

[0088] Use a comparator to set a voltage threshold to determine if a signal exists (above the threshold = signal present, below the threshold = no signal present);

[0089] The fault range determination logic described in the document can be implemented using basic logic gates (such as AND gates, OR gates, NOT gates) or programmable logic devices (such as CPLD / FPGA, but still hardware logic).

[0090] Furthermore, the aforementioned monitoring device on this side determines the fault range inside and outside the fiber optic channel it is connected to. This "determination" is actually a combination of hardware level outputs.

[0091] The judgment logic described in the embodiments of this application (such as "if there is no signal in the transmitting fiber on this side, then the fault is inside this side") can be a combination of a series of Boolean logic conditions, which can be implemented by hardware circuits: for example, "no signal in the transmitting fiber" is an input condition; "no signal in the receiving fiber" is another input condition; by combining the level states (high / low) of these inputs, different results are output via logic gate circuits (e.g., driving different fault indicator lights).

[0092] For example, the "discrimination result of the fiber optic channel of the monitoring device on the other side" mentioned in the aforementioned method can be a status signal transmitted from the monitoring device on the other side to the monitoring device on this side through a communication module; for example, it can be that the hardware judgment status of the other side (such as "the other side sends normal / abnormal") is sent to the device on this side or the upper-level system through a communication module (such as dry contact output, simple serial communication, etc.), and the device on this side receives it and then makes a final judgment based on its own status. This process can also be implemented by hardware driver or through a simple status register.

[0093] The fiber channel monitoring device proposed in this application is a fusion splicing device with built-in fiber channel online monitoring function. This device does not require the use of complex OTDR optical reflection technology to accurately determine the fault location. It only needs to use simple I / O logic to determine whether the signal is interrupted, thereby determining the fault range and quickly determining the area of ​​responsibility for maintenance work. It has the characteristics of high economy and practicality.

[0094] It should be noted that the information interaction and execution process between the above-mentioned devices / units are based on the same concept as the method embodiments of this application. For details on their specific functions and technical effects, please refer to the method embodiments section, and they will not be repeated here.

[0095] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0096] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0097] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0098] In the embodiments provided in this application, it should be understood that the disclosed apparatus / network devices and methods can be implemented in other ways. For example, the apparatus / network device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0099] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0100] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A monitoring device for an optical fiber channel, characterized in that, The device includes a fusion splicing chamber (01), a sensing chamber (02), and a pigtail; the fusion splicing chamber (01) is used to support the fusion splicing of the pigtail and the external optical fiber to form an optical fiber channel; the pigtail is used to connect the relay protection device corresponding to the monitoring device, and the external optical fiber is used to connect the monitoring device on the opposite side; the optical fiber channel is used to transmit protection signals between adjacent relay protection devices in the substation. The sensing cabin (02) is configured to perform optical power attenuation compensation function; The sensing cabin (02) includes at least a beam splitter module (21), a signal amplifier (22), a signal monitoring module (23), a communication module (24), a power supply module (25), and the pigtail; The sensing chamber (02) is also configured to monitor the optical fiber signal of the optical fiber channel in real time and transmit the obtained optical fiber channel monitoring results to the online monitoring device in real time through the communication module (24); wherein the sensing chamber (02) maintains a communication connection with the online monitoring device through the communication module (24); The optical splitting module (21) is used to separate the optical signal in the optical fiber channel to obtain a service branch and a monitoring branch. The service branch compensates for the attenuated optical signal through a signal amplifier (22). When the optical signal on the service branch passes through the signal amplifier (22), the fiber core of the service branch is connected to the optical fiber interface of the relay protection device through a tail jumper connector. The monitoring branch couples its optical signal to the signal monitoring module (23), which identifies whether there is a signal input or output in the optical fiber channel in real time, and transmits the obtained optical fiber channel monitoring results to the online monitoring device in real time through the signal communication module (24). The power module (25) is configured to continuously provide power to the device in the event of an external power outage.

2. A fiber optic channel monitoring system, characterized in that, The system includes online monitoring equipment, network communication equipment, and n monitoring devices for fiber optic channels as described in claim 1 in a substation; n is a positive integer; The various relay protection devices in the substation transmit protection signals through optical fiber channels, and each relay protection device in the substation is configured to be connected to a monitoring device as described in claim 1. The monitoring devices of two adjacent relay protection devices are connected by a fiber optic channel to form a monitoring device on this side and a monitoring device on the opposite side. The online monitoring device is used to obtain the fiber optic channel monitoring results reported by n monitoring devices through the network communication device. The local monitoring device is used to determine the fault range inside and outside the optical fiber channel connected to the local monitoring device by combining the signal on / off status of the local relay protection device and / or the discrimination result of the optical fiber channel of the opposite monitoring device, and to generate the optical fiber channel monitoring result; the local relay protection device is the relay protection device connected to the local monitoring device.

3. The fiber optic channel monitoring system as described in claim 2, characterized in that, The monitoring device also includes a fault indication module; The fault indication module is used to display the fault range of the optical fiber channel.

4. The fiber optic channel monitoring system as described in claim 2, characterized in that, The system is used to monitor m substations, and the online monitoring equipment is used to acquire the fiber optic channel monitoring results reported by n monitoring devices in each of the m substations; m is a positive integer.

5. A method for monitoring an optical fiber channel, characterized in that, The monitoring method is applied to the fiber optic channel monitoring system as described in any one of claims 2 to 4, and the method includes: The local monitoring device collects the signal on / off status of the local relay protection device; the local relay protection device is the relay protection device connected to the local monitoring device; The local monitoring device acquires the discrimination results of the optical fiber channel of the remote monitoring device; The local monitoring device determines the fault range inside and outside the optical fiber channel connected to the local monitoring device based on the signal on / off status and / or the discrimination result of the optical fiber channel of the remote monitoring device, and generates optical fiber channel monitoring results. The local monitoring device reports the monitoring results of the fiber optic channel to the online monitoring equipment.

6. The monitoring method for an optical fiber channel as described in claim 5, characterized in that, Each of the monitoring devices comprises a receiving fiber optic channel and a transmitting fiber optic channel; Wherein, the receiving optical fiber of the local monitoring device is the transmitting optical fiber of the counterpart monitoring device; and the transmitting optical fiber of the local monitoring device is the receiving optical fiber of the counterpart monitoring device.

7. The monitoring method for an optical fiber channel as described in claim 6, characterized in that, The step of determining the fault range inside and outside the optical fiber channel connected to the local monitoring device includes: If the signal monitoring module of the local monitoring device does not detect a real-time signal in the monitoring branch of its transmitting optical fiber, it indicates that there is an interruption in the optical fiber channel of the local monitoring device, and the fault area is located in the internal optical fiber of the local monitoring device.

8. The monitoring method for an optical fiber channel as described in claim 6, characterized in that, The step of determining the fault range inside and outside the optical fiber channel connected to the local monitoring device includes: If the signal monitoring module of the local monitoring device detects a real-time signal in the monitoring branch of its transmitting optical fiber, it indicates that the internal optical fiber of the local monitoring device is normal. If the signal monitoring module of the opposite monitoring device detects a real-time signal in the optical fiber branch of its transmitting optical fiber, it indicates that the external optical fiber channel is normal. If the signal reception of the opposite relay protection device is abnormal under these circumstances, it is determined that the internal optical fiber channel of the opposite monitoring device is faulty.

9. The monitoring method for an optical fiber channel as described in claim 6, characterized in that, The step of determining the fault range inside and outside the optical fiber channel connected to the local monitoring device includes: If the signal monitoring module of the local monitoring device does not detect a real-time signal in the monitoring branch of its receiving optical fiber, it indicates that there is an interruption in the optical fiber passage, and the fault range is the external optical fiber or the internal optical fiber of the opposite monitoring device. If the signal monitoring module of the opposite monitoring device detects a real-time signal in the fiber optic branch of its transmitting fiber, it indicates that the internal fiber of the opposite monitoring device is normal and the faulty section is the external fiber; if the signal monitoring module of the opposite monitoring device does not detect a real-time signal in the fiber optic branch of its transmitting fiber, it indicates that the faulty section is the internal fiber of the opposite monitoring device.

10. The monitoring method for an optical fiber channel as described in claim 6, characterized in that, The step of determining the fault range inside and outside the optical fiber channel connected to the local monitoring device includes: If the signal monitoring module of the local monitoring device detects a real-time signal in the monitoring branch of its receiving optical fiber, it indicates that the external optical fiber and the internal optical fiber of the opposite monitoring device are normal; and if the signal reception of the local relay protection device is abnormal, it is determined that there is a fault in the internal optical fiber channel of the local monitoring device.

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