Method and system for monitoring special optical fiber protection channel additionally arranged on 220kV small adjacent line of power station

Abstract

The invention discloses a monitoring method and system for additionally arranging a special optical fiber protection channel on a 220kV small adjacent line of a power station, and relates to the technical field of optical fiber protection channel monitoring, and the method comprises the steps: installing a special optical fiber protection device and a light protection clamping plate on each line in the power station at the two ends of the adjacent line; real-time optical fiber data acquisition and transmission are carried out based on an optical fiber protection device, and preprocessing is carried out; generating an optical fiber monitoring instruction based on the optical fiber data and evaluating an optical fiber state; and triggering an alarm mechanism based on the optical fiber monitoring instruction. According to the invention, a complete monitoring system is constructed, comprehensive monitoring of the optical fiber communication quality is realized, cooperative work of multiple components is realized, the reliability of signal transmission is enhanced, the fault detection speed is improved, and thus the safety risk caused by communication interruption is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber protection channel monitoring, in particular to a method and system for monitoring a special optical fiber protection channel added to a 220kV small temporary line of a power station. Background Art

[0002] With the continuous development and expansion of the power system, the safe and stable operation of the power transmission network has become particularly important. For high-voltage transmission lines, such as 220kV transmission lines, ensuring their safe and reliable operation is one of the key factors in the stability of the power system. Traditional transmission line protection methods mainly rely on relay protection technology and electromagnetic protection equipment. Although these technologies have guaranteed the stability of the power system to a certain extent, they are unable to cope with the complex and changeable situation of modern power grids. In recent years, with the rapid development of optical fiber communication technology, optical fiber has been widely used in power systems as a high-performance communication medium, especially for the protection and monitoring of power lines.

[0003] In the actual deployment process, due to the wide distribution of power lines and complex and changeable environmental conditions, the existing fiber optic protection system often finds it difficult to achieve all-round and all-round monitoring coverage. Especially under extreme weather conditions, the stability of the fiber optic signal will be affected, which in turn affects the accuracy and timeliness of fault detection. At the same time, the existing fiber optic protection equipment usually adopts a single monitoring strategy and cannot flexibly adapt to the specific conditions of different lines, resulting in low monitoring efficiency. This limitation is even more obvious in complex power grid environments. Summary of the invention

[0004] In view of the above existing problems, the present invention is proposed.

[0005] Therefore, the present invention provides a method and system, device, computer equipment and storage medium for adding a dedicated optical fiber protection channel monitoring method for a 220kV small temporary line in a power station to solve the problems of incomplete optical fiber protection monitoring and delayed response of existing 220kV power line.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] In a first aspect, an embodiment of the present invention provides a method for monitoring a dedicated optical fiber protection channel for a 220kV small temporary line of a power station, which comprises installing a dedicated optical fiber protection device and an optical protection card board on each line in the power stations at both ends of the temporary line;

[0008] Collect and transmit real-time optical fiber data based on optical fiber protection devices, and perform preprocessing;

[0009] Generate fiber monitoring instructions based on fiber data to evaluate fiber status;

[0010] Based on the fiber optic monitoring instructions, the alarm mechanism is triggered.

[0011] As a preferred solution of the monitoring method for adding a dedicated optical fiber protection channel for a 220kV small temporary line of a power station described in the present invention, the optical fiber protection device includes a merging unit, an intelligent terminal, an optical fiber switch and a monitoring device. An optical fiber splitter is installed at the merging unit and the intelligent terminal to divide the optical fiber signal of the merging unit into two paths, one of which is directly sent to the intelligent terminal and the other is used for monitoring. At the same time, the intelligent terminal signal is divided into two paths, one of which is used for actual protection action and the other is used for monitoring;

[0012] The merging unit, intelligent terminal and monitoring device are connected through a fiber optic switch to ensure reliable transmission of fiber optic signals.

[0013] As a preferred solution of the method for monitoring the additional dedicated optical fiber protection channel for the 220kV small temporary line of the power station described in the present invention, the optical protection card board includes an optical splitter, which divides the service optical signal of the first service system into two paths, a working optical fiber and a protection optical fiber, and transmits the service optical signal to the optical protection card of the other site through the working optical fiber and the protection optical fiber respectively, and receives the optical signal transmitted from the other site through the working optical fiber and the protection optical fiber at the same time;

[0014] Power monitoring points are set on the working optical fiber and the protection optical fiber, which are defined as the first power monitoring point and the second power monitoring point respectively, for real-time monitoring of the optical signal strength. When the optical signal strength is lower than the threshold, a LOS alarm is generated;

[0015] An optical switch is installed in the optical protection board. Under normal circumstances, the working optical fiber is selected as the main transmission channel. When a problem with the working optical fiber is detected, it automatically switches to the protection optical fiber as the backup channel.

[0016] As a preferred solution of the method for monitoring the additional dedicated optical fiber protection channel for the 220kV small temporary line of the power station described in the present invention, the real-time optical fiber data collection and transmission based on the optical fiber protection device includes: using the AES encryption algorithm encryption transmission technology to encrypt the data collected by the merging unit and the intelligent terminal, and transmit it to the monitoring device through the optical fiber switch. The monitoring device decrypts the received encrypted data and performs subsequent data processing.

[0017] As a preferred solution of the monitoring method for adding a dedicated optical fiber protection channel for a 220kV small temporary line of a power station according to the present invention, wherein: the generating of an optical fiber monitoring instruction based on optical fiber data includes, when the monitoring device detects a signal loss alarm LOS, generating an optical fiber monitoring instruction corresponding to the alarm and sending it to the optical time domain reflectometer;

[0018] Determine whether the LOS alarm is generated at the first power monitoring point or the second power monitoring point, and generate corresponding optical fiber monitoring instructions, which are defined as the first optical fiber monitoring instruction and the second optical fiber monitoring instruction respectively;

[0019] The optical time domain reflectometer sends monitoring light to the working optical fiber and the protection optical fiber through different interfaces according to the received optical fiber monitoring instructions;

[0020] For the first optical fiber monitoring instruction, the optical time domain reflectometer sends monitoring light to the working optical fiber through the first interface and the fourth interface;

[0021] For the second optical fiber monitoring instruction, the optical time domain reflectometer sends monitoring light to the protection optical fiber through the second interface and the third interface;

[0022] The optical time domain reflectometer collects the reflected light signal and evaluates the optical fiber status by analyzing the time delay and intensity change of the reflected light.

[0023] As a preferred solution of the method for monitoring the additional dedicated optical fiber protection channel for the 220kV small temporary line of the power station described in the present invention, wherein: the generation of the optical fiber monitoring instruction by the optical fiber protection device also includes:

[0024] The optical time domain reflectometer feeds back the evaluation results of the reflected optical signal to the monitoring device.

[0025] The monitoring device feeds back the received evaluation results to the user through the interactive device to quickly locate the fault location.

[0026] As a preferred solution of the monitoring method for adding a dedicated optical fiber protection channel to the 220kV small temporary line of the power station described in the present invention, wherein: the triggering alarm mechanism includes defining a threshold value of key performance indicator data of the optical fiber, and monitoring various performance indicator data of the optical fiber channel in real time through the optical fiber protection device, including optical fiber signal strength and bit error rate;

[0027] The monitoring device receives the evaluation result returned by the optical time domain reflectometer after evaluating the optical signal through the monitoring light. When the monitored optical fiber signal strength and bit error rate and the evaluation result exceed the threshold, the alarm mechanism is triggered and the monitoring device automatically generates an alarm message.

[0028] In the second aspect, the present invention provides a dedicated optical fiber protection channel monitoring system for a 220kV small temporary line in a power station, comprising: an optical fiber protection device module: used for collecting and transmitting real-time optical fiber data; an optical protection card board module: used for preprocessing the collected optical fiber performance data; a data transmission module: used for efficiently transmitting optical fiber data to a data center or a monitoring center in real time; a data processing module: used for in-depth processing of the transmitted data; a monitoring instruction generation module: used for generating optical fiber monitoring instructions to guide the maintenance and adjustment of the system; an alarm trigger module: used for automatically triggering the alarm mechanism and sending alarm information to relevant personnel.

[0029] In a third aspect, an embodiment of the present invention provides a computer device, including a memory and a processor, wherein the memory stores a computer program, wherein: when the computer program is executed by the processor, it implements any step of the method and system for monitoring the addition of a dedicated optical fiber protection channel to the 220kV small temporary line of a power station as described in the first aspect of the present invention.

[0030] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein: when the computer program is executed by a processor, it implements any step of the method and system for monitoring the addition of a dedicated optical fiber protection channel to the 220kV small temporary line of a power station as described in the first aspect of the present invention.

[0031] The beneficial effects of the present invention are: 1. Constructing a complete monitoring system to realize comprehensive monitoring of the quality of optical fiber communication and realize the collaborative work of multiple components, which not only enhances the reliability of signal transmission, but also improves the speed of fault detection, thereby reducing the safety risks caused by communication interruption.

[0032] 2. Realize dual-channel transmission to ensure that the system can quickly switch to the backup channel when the main channel fails, increase the redundancy of the system, and ensure that even if the main channel fails, services can continue to be provided through the backup channel, reducing downtime and improving system availability.

[0033] 3. Use optical time domain reflectometry technology to accurately measure the state of the optical fiber, automatically identify performance indicators that exceed the normal range, and promptly notify the operation and maintenance personnel to take measures. This reduces the fault response time through automated alarms, helps prevent potential service interruptions, and ensures the continuity of power grid operation. At the same time, it can accurately obtain the physical condition of the optical fiber, help the operation and maintenance personnel quickly locate the problem, and improve the accuracy and speed of troubleshooting. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0035] Figure 1 This is a flow chart of the monitoring method and system for adding a dedicated optical fiber protection channel to the 220kV small temporary line of the power station in Example 1.

[0036] Figure 2 This is a decision diagram of the optical fiber monitoring instruction in Example 1. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0038] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0040] Example 1

[0041] Reference Figure 1 and Figure 2 , which is the first embodiment of the present invention, and which provides a monitoring method for adding a dedicated optical fiber protection channel to a 220kV small temporary line of a power station, comprising the following steps: installing a dedicated optical fiber protection device and an optical protection card board on each line in the power stations at both ends of the temporary line;

[0042] The optical fiber protection device includes a merging unit, an intelligent terminal, an optical fiber switch and a monitoring device. An optical fiber splitter is installed at the merging unit and the intelligent terminal to split the optical fiber signal of the merging unit into two paths, one of which is directly sent to the intelligent terminal and the other is used for monitoring. At the same time, the signal of the intelligent terminal is split into two paths, one of which is used for actual protection action and the other is used for monitoring.

[0043] Merging unit: Installed in the substation, it is responsible for converting analog signals from different sensors into digital signals and transmitting them to the smart terminal via optical fiber.

[0044] Intelligent terminal: Receives data sent by the merging unit, performs necessary data processing, and triggers protection actions according to preset rules.

[0045] Monitoring device: Receives data from smart terminals, performs data analysis and processing, monitors the operating status of the entire system, and takes action when necessary.

[0046] Connect the merging unit, intelligent terminal and monitoring device through the optical fiber switch to ensure the reliable transmission of optical fiber signals;

[0047] The optical protection card board includes an optical splitter, which divides the service optical signal of the first service system into two paths, a working optical fiber and a protection optical fiber, and transmits the service optical signal to the optical protection card of the other site through the working optical fiber and the protection optical fiber respectively, and receives the optical signal transmitted from the other site through the working optical fiber and the protection optical fiber at the same time;

[0048] Power monitoring points are set on the working optical fiber and the protection optical fiber, which are defined as the first power monitoring point and the second power monitoring point respectively, for real-time monitoring of the optical signal strength. When the optical signal strength is lower than the threshold, a LOS alarm is generated;

[0049] An optical switch is installed in the optical protection board. Under normal circumstances, the working optical fiber is selected as the main transmission channel. When a problem is detected in the working optical fiber, it automatically switches to the protection optical fiber as the backup channel.

[0050] Collect and transmit real-time optical fiber data based on optical fiber protection devices, and perform preprocessing;

[0051] The AES encryption algorithm is used to encrypt the data collected by the merging unit and the intelligent terminal, and transmit it to the monitoring device through the optical fiber switch. The monitoring device decrypts the received encrypted data and performs subsequent data processing;

[0052] Generate fiber monitoring instructions based on fiber data to evaluate fiber status;

[0053] When the monitoring device detects a signal loss alarm LOS, it generates an optical fiber monitoring instruction corresponding to the alarm and sends it to the optical time domain reflectometer;

[0054] When the first power monitoring point detects a light-free situation, a signal loss alarm LOS is generated and reported to the controller, triggering the optical time domain reflectometer monitoring. Similarly, when the second power monitoring point detects a light-free situation, a signal loss alarm LOS is also generated and reported to the controller, triggering the optical time domain reflectometer monitoring.

[0055] Determine whether the LOS alarm is generated at the first power monitoring point or the second power monitoring point, and generate corresponding optical fiber monitoring instructions, which are defined as the first optical fiber monitoring instruction and the second optical fiber monitoring instruction respectively;

[0056] The optical time domain reflectometer sends monitoring light to the working optical fiber and the protection optical fiber through different interfaces according to the received optical fiber monitoring instructions;

[0057] For the first optical fiber monitoring instruction, the optical time domain reflectometer sends monitoring light to the working optical fiber through the first interface and the fourth interface;

[0058] For the second optical fiber monitoring instruction, the optical time domain reflectometer sends monitoring light to the protection optical fiber through the second interface and the third interface;

[0059] The optical time domain reflectometer collects the reflected optical signal and evaluates the optical fiber status by analyzing the time delay and intensity change of the reflected light;

[0060] The optical time domain reflectometer feeds back the evaluation result of the reflected optical signal to the monitoring device;

[0061] The evaluation results include the fiber terminal distance and the splice loss. The calculation formula for the fiber terminal distance is:

[0062]

[0063] Where: DTF represents the fiber terminal distance, c represents the speed of light in the fiber, and τ represents the time interval from the emission of the light pulse to the reception of the reflected light pulse.

[0064] The expression for measuring the splice loss is:

[0065]

[0066] Where: SL represents the splice loss, P 入 Optical power before the splicing point, P 出 is the optical power after the splice point.

[0067] The monitoring device feeds back the received evaluation results to the user through the interactive device to quickly locate the fault location;

[0068] Based on the fiber optic monitoring instructions, the alarm mechanism is triggered.

[0069] Define the thresholds of key performance indicator data of optical fiber, and use the optical fiber protection device to monitor the performance indicator data of the optical fiber channel in real time, including optical fiber signal strength and bit error rate;

[0070] The monitoring device receives the evaluation result returned by the optical time domain reflectometer after evaluating the optical signal through the monitoring light. When the monitored optical fiber signal strength and bit error rate and the evaluation result exceed the threshold, the alarm mechanism is triggered and the monitoring device automatically generates an alarm message.

[0071] The present embodiment also provides a dedicated optical fiber protection channel monitoring system for a 220kV small temporary line in a power station, including: an optical fiber protection device module: used for collecting and transmitting real-time optical fiber data; an optical protection card board module: used for pre-processing the collected optical fiber performance data; a data transmission module: used for efficiently transmitting optical fiber data to a data center or a monitoring center in real time; a data processing module: used for in-depth processing of the transmitted data; a monitoring instruction generation module: used for generating optical fiber monitoring instructions to guide the maintenance and adjustment of the system; an alarm trigger module: used for automatically triggering an alarm mechanism and sending an alarm message to relevant personnel.

[0072] This embodiment also provides a computer device, which is applicable to the case of a monitoring method and system for adding a dedicated optical fiber protection channel for a small temporary line of a power station, including: a memory and a processor; the memory is used to store computer executable instructions, and the processor is used to execute computer executable instructions to implement the monitoring method and system for adding a dedicated optical fiber protection channel for a small temporary line of a power station as proposed in the above embodiment.

[0073] The computer device may be a terminal, and the computer device includes a processor, a memory, a communication interface, a display screen and an input device connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, an operator network, NFC (near field communication) or other technologies. The display screen of the computer device may be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device may be a touch layer covering the display screen, or a key, trackball or touchpad provided on the housing of the computer device, or an external keyboard, touchpad or mouse, etc.

[0074] The present embodiment also provides a storage medium on which a computer program is stored. When the program is executed by a processor, the method and system for monitoring the installation of a dedicated optical fiber protection channel for a 220 kV small temporary line in a power station as proposed in the above embodiment are implemented; the storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as a static random access memory (SRAM), an electrically erasable programmable read-only memory (EEPROM), an erasable programmable read-only memory (EPROM), a programmable read-only memory (PROM), a read-only memory (ROM), a magnetic memory, a flash memory, a disk or an optical disk.

[0075] In summary, the present invention realizes the monitoring and understanding of user behavior through the analysis of user file operation behavior, can accurately capture the user's operation habits and behavior patterns, provide basic data for the subsequent generation of encryption strategies, and also help the system to detect and prevent abnormal behaviors; predict the user's future operations according to the user's behavior habits, so as to formulate encryption strategies more intelligently; more accurately protect user privacy, reduce the risk of data leakage, and improve the data security and confidentiality of the system; the present invention better adapts to the user's operation habits and needs, improves the intelligence level of the encryption algorithm and user experience, and enhances the flexibility and adaptability of the system.

[0076] Example 2

[0077] Referring to Table 1, which is the second embodiment of the present invention, in order to further verify the advancement of the present invention, experimental simulation data of a monitoring method and system for adding a dedicated optical fiber protection channel to a 220kV small temporary line in a power station are provided.

[0078] Two monitoring systems were used in the experiment: one was the monitoring system of the present invention, and the other was an existing traditional monitoring system, so as to compare the performance.

[0079] Before the test, special fiber optic protection devices and optical protection card boards were installed at both ends of the adjacent lines of Station A and Station B. The merging units, intelligent terminals, fiber optic switches and monitoring devices of each line were installed and debugged according to the design requirements to ensure that all equipment was in normal working condition. At the same time, a splitter was installed in the optical protection card board to divide the business optical signal into working optical fiber and protection optical fiber, and power monitoring points were set on the optical protection card boards at both ends to monitor the optical signal strength in real time.

[0080] Two optical fiber links are laid between station A and station B, one as the working optical fiber link and the other as the protection optical fiber link. In the simulation operation, the working optical fiber link is cut off to simulate the possible fault conditions in the actual operation, so as to test the response capability of the system and the effectiveness of the switching mechanism.

[0081] During the test, AES encryption algorithm encryption transmission technology is used to ensure data security. The monitoring device decrypts the received encrypted data and generates fiber monitoring instructions based on the decrypted data. Once the monitoring device detects the signal loss alarm LOS, it will immediately generate the corresponding fiber monitoring instruction and send it to the optical time domain reflectometer. According to the received instruction, the optical time domain reflectometer sends monitoring light to the working fiber and protection fiber through different interfaces, and collects the reflected optical signal. The fiber status is evaluated by analyzing the time delay and intensity change of the reflected light. The key performance indicators such as fiber signal strength, bit error rate, alarm response time, and fault location accuracy are also recorded and compared in detail.

[0082] Table 1 is the performance comparison of the monitoring system before and after the improvement:

[0083]

[0084] The working fiber signal strength of the monitoring system of the present invention is -17.8dB, and the protection fiber signal strength is -18.2dB, while the working fiber signal strength of the traditional monitoring system is -18.5dB, and the protection fiber signal strength is -19.0dB, indicating that the signal strength of the monitoring system of the present invention is stronger and the anti-interference ability is better.

[0085] The bit error rate of the working fiber of the monitoring system of the present invention is 1.1e-7, and the bit error rate of the protection fiber is 1.3e-7, while the bit error rate of the working fiber of the traditional monitoring system is 1.2e-6, and the bit error rate of the protection fiber is 1.4e-6, indicating that the bit error rate of the monitoring system of the present invention is lower and the transmission quality is higher.

[0086] The working fiber alarm response time of the monitoring system of the present invention is 3.2s, and the protection fiber alarm response time is 3.4s, while the working fiber alarm response time of the traditional monitoring system is 15.3s, and the protection fiber alarm response time is 16.1s, indicating that the monitoring system of the present invention is faster in fault detection and response, and can take measures more quickly to prevent accidents from expanding.

[0087] The working fiber fault location accuracy of the monitoring system of the present invention is 98%, and the protection fiber fault location accuracy is 97%, while the working fiber fault location accuracy of the traditional monitoring system is 75%, and the protection fiber fault location accuracy is 72%, indicating that the monitoring system of the present invention is more accurate in fault location, and can effectively help technicians quickly find the problem and shorten the repair time.

[0088] To sum up, the monitoring system of the present invention shows obvious advantages in many aspects such as signal strength, bit error rate, alarm response time and fault location accuracy. These advantages reflect the outstanding characteristics of the present invention in terms of technological innovation and practical value, and can effectively improve the operating safety and stability of the 220kV small temporary line of the power station, reduce power outages caused by optical fiber failures, and have important practical significance and application prospects.

[0089] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A monitoring method for adding a dedicated optical fiber protection channel to a 220kV small temporary line in a power station, characterized in that: include: Install dedicated optical fiber protection devices and optical protection card boards on each line in the power stations at both ends of the adjacent line; Collect and transmit real-time optical fiber data based on optical fiber protection devices, and perform preprocessing; Generate fiber monitoring instructions based on fiber data to evaluate fiber status; Based on the fiber optic monitoring instructions, the alarm mechanism is triggered.

2. The monitoring method for adding a dedicated optical fiber protection channel for a 220 kV small temporary line in a power station as claimed in claim 1 is characterized in that: The optical fiber protection device includes a merging unit, an intelligent terminal, an optical fiber switch and a monitoring device. An optical fiber splitter is installed at the merging unit and the intelligent terminal to split the optical fiber signal of the merging unit into two paths, one of which is directly sent to the intelligent terminal and the other is used for monitoring. At the same time, the intelligent terminal signal is split into two paths, one of which is used for actual protection action and the other is used for monitoring. The merging unit, intelligent terminal and monitoring device are connected through a fiber optic switch to ensure reliable transmission of fiber optic signals.

3. The monitoring method for adding a dedicated optical fiber protection channel for a 220 kV small temporary line in a power station as claimed in claim 2 is characterized in that: The optical protection card board includes an optical splitter, which divides the service optical signal of the first service system into two paths, a working optical fiber and a protection optical fiber, and transmits the service optical signal to the optical protection card of the other site through the working optical fiber and the protection optical fiber respectively, and receives the optical signal transmitted from the other site through the working optical fiber and the protection optical fiber at the same time; Power monitoring points are set on the working optical fiber and the protection optical fiber, which are defined as the first power monitoring point and the second power monitoring point respectively, for real-time monitoring of the optical signal strength. When the optical signal strength is lower than the threshold, a LOS alarm is generated; An optical switch is installed in the optical protection board. Under normal circumstances, the working optical fiber is selected as the main transmission channel. When a problem with the working optical fiber is detected, it automatically switches to the protection optical fiber as the backup channel.

4. The monitoring method for adding a dedicated optical fiber protection channel for a 220 kV small temporary line in a power station as claimed in claim 3 is characterized in that: The real-time optical fiber data collection and transmission based on the optical fiber protection device includes: using AES encryption algorithm encryption transmission technology to encrypt the data collected by the merging unit and the intelligent terminal, and transmit it to the monitoring device through the optical fiber switch. The monitoring device decrypts the received encrypted data and performs subsequent data processing.

5. The monitoring method for adding a dedicated optical fiber protection channel for a 220 kV small temporary line in a power station as claimed in claim 4 is characterized in that: The generating of the optical fiber monitoring instruction based on the optical fiber data includes, when the monitoring device detects a signal loss alarm LOS, generating an optical fiber monitoring instruction corresponding to the alarm and sending it to the optical time domain reflectometer; Determine whether the LOS alarm is generated at the first power monitoring point or the second power monitoring point, and generate corresponding optical fiber monitoring instructions, which are defined as the first optical fiber monitoring instruction and the second optical fiber monitoring instruction respectively; The optical time domain reflectometer sends monitoring light to the working optical fiber and the protection optical fiber through different interfaces according to the received optical fiber monitoring instructions; For the first optical fiber monitoring instruction, the optical time domain reflectometer sends monitoring light to the working optical fiber through the first interface and the fourth interface; For the second optical fiber monitoring instruction, the optical time domain reflectometer sends monitoring light to the protection optical fiber through the second interface and the third interface; The optical time domain reflectometer collects the reflected light signal and evaluates the optical fiber status by analyzing the time delay and intensity change of the reflected light.

6. The monitoring method for adding a dedicated optical fiber protection channel for a 220 kV small temporary line in a power station as claimed in claim 5 is characterized in that: The generating of the optical fiber monitoring instruction by the optical fiber protection device also includes: The optical time domain reflectometer feeds back the evaluation results of the reflected optical signal to the monitoring device. The monitoring device feeds back the received evaluation results to the user through the interactive device to quickly locate the fault location.

7. The monitoring method for adding a dedicated optical fiber protection channel for a 220 kV small temporary line in a power station as claimed in claim 6 is characterized in that: The triggering alarm mechanism includes defining the threshold of key performance indicator data of optical fiber, and monitoring various performance indicator data of optical fiber channel in real time through the optical fiber protection device, including optical fiber signal strength and bit error rate; The monitoring device receives the evaluation result returned by the optical time domain reflectometer after evaluating the optical signal through the monitoring light. When the monitored optical fiber signal strength and bit error rate and the evaluation result exceed the threshold, the alarm mechanism is triggered and the monitoring device automatically generates an alarm message.

8. A monitoring system for adding a dedicated optical fiber protection channel for a 220 kV small temporary line in a power station, based on the monitoring method for adding a dedicated optical fiber protection channel for a 220 kV small temporary line in a power station according to any one of claims 1 to 7, characterized in that: include: Optical fiber protection device module: used to collect and transmit real-time optical fiber data; Optical protection card module: used to pre-process the collected optical fiber performance data; Data transmission module: used to efficiently transmit optical fiber data to the data center or monitoring center in real time; Data processing module: used to perform in-depth processing on the transmitted data; Monitoring instruction generation module: used to generate optical fiber monitoring instructions to guide system maintenance and adjustment; alarm trigger module: used to automatically trigger the alarm mechanism and send alarm information to relevant personnel.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the monitoring method and system for adding a dedicated optical fiber protection channel to a 220kV small temporary line of a power station are implemented as described in any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the monitoring method and system for adding a dedicated optical fiber protection channel to a 220kV small temporary line of a power station as described in any one of claims 1 to 7 are implemented.

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