Intelligent protection system and method based on distribution automation PON optical link

Abstract

The invention discloses an intelligent protection system and method based on a power distribution automation PON optical link, and belongs to the technical field of power management. According to the method, the problem that the workload is large due to the fact that operation and maintenance are complex in an existing method is solved, the PON network is established in the power distribution network, and the optical fiber historical state information is calculated to obtain the optical fiber early warning threshold value; establishing a main optical fiber link and a standby optical fiber link, and setting a trigger condition of the standby optical fiber link; the real-time state of the optical fiber is evaluated based on the early warning threshold value, and if the optical fiber link triggers the fault condition, the current optical fiber link is automatically switched from the main optical fiber link to the standby optical fiber link, so that the continuity of power supply of the power distribution network is ensured, and the reliability of power supply is improved; through setting a timing feedback mechanism, the timing feedback of the link state is realized, so that the state processing unit can receive the latest state information in time and make corresponding adjustment and optimization according to the state information so as to ensure the stable operation of the power distribution network.

Description

Technical Field

[0001] The present invention relates to the technical field of power management, and in particular to an intelligent protection system and method based on a distribution automation PON optical link. Background Art

[0002] Distribution automation is a new type of power management system. It monitors, controls and optimizes the power grid through automation technology. It can monitor the status of the power grid in real time, accurately predict faults, take timely measures to avoid fault expansion, and ensure the continuity and stability of power supply. PON optical link refers to the optical transmission link in the passive optical network PON, which is mainly composed of optical line terminal OLT, optical distribution network ODN and optical network unit ONU. It can deliver electric energy to users in a highly efficient and low-cost manner, and realize remote communication and control through the optical fiber network, greatly reducing power loss and improving power supply quality and reliability. Distribution automation PON optical link is to apply PON technology to the distribution automation system, remotely monitor and manage distribution automation equipment through optical links, and realize more intelligent and automated power management.

[0003] With the continuous development of network technology, PON optical links need to support faster and more complex network scenarios. Implementing a protection mechanism for PON optical links can ensure that the stability and reliability of the network are not affected during network upgrades and expansions, which is an important measure to adapt to complex network environments and meet future business needs.

[0004] However, in the prior art, the PON optical link protection mechanism needs to be regularly inspected and maintained to ensure that the backup link is available; however, this increases the complexity and workload of operation and maintenance, and increases the overall network deployment and maintenance costs.

[0005] Therefore, the existing needs are not met, and we propose an intelligent protection system and method based on distribution automation PON optical link. Summary of the invention

[0006] The purpose of the present invention is to provide an intelligent protection system and method based on a distribution automation PON optical link. The system establishes a PON network in a distribution network, calculates the historical status information of the optical fiber, and obtains an optical fiber warning threshold; establishes a main optical fiber link and a backup optical fiber link, and sets the triggering condition of the backup optical fiber link; evaluates the real-time status of the optical fiber based on the warning threshold, and if the optical fiber link triggers a fault condition, the current optical fiber link is automatically switched from the main optical fiber link to the backup optical fiber link, thereby ensuring the continuity of the power supply of the distribution network and improving the reliability of power supply; and sets a timing feedback mechanism to achieve timing feedback on the link status, so that the status processing unit can receive the latest status information in time, and make corresponding adjustments and optimizations according to the status information, so as to ensure the stable operation of the distribution network, thereby solving the problems raised in the above-mentioned background technology.

[0007] The object of the present invention is achieved as follows: an intelligent protection system based on a distribution automation PON optical link, characterized in that: the intelligent protection system includes a PON network construction unit, which is used to establish a PON network in the distribution network and connect the power consumption equipment in the distribution network and the distribution automation system through optical fibers;

[0008] The link acquisition unit is used to obtain the historical status information of the optical fiber in the distribution network PON network through the network crawler technology to form an optical fiber information database; the optical fiber status information includes: length, loss, number of connectors and connection status; and the optical fiber status is monitored in real time through the distribution automation system. The optical fiber status includes: changes in optical fiber length, loss and connector status;

[0009] The state processing unit is used to pre-process the historical state information of the optical fiber, and calculate the historical state information of the pre-processed optical fiber by extracting the intermediate value method, extract the warning threshold of each state of the optical fiber, and evaluate and warn the real-time state of the optical fiber based on each warning threshold to obtain the current state information of the optical fiber;

[0010] The intelligent protection unit is used to establish a fiber link fault protection mechanism, including: establishing a main fiber link and a backup fiber link, and setting a triggering condition for the backup fiber link; based on the current fiber status information, if the current fiber link triggers a fault condition, the current fiber link is automatically switched from the main fiber link to the backup fiber link through the intelligent protection unit;

[0011] The timing feedback unit is used to set a timing feedback mechanism for the link collection unit. After the link collection unit collects the state of the optical fiber in real time, it feeds back data to the state processing unit according to the feedback node timing.

[0012] Preferably, the PON network construction unit includes:

[0013] Network construction module, used to build a PON network in the distribution network;

[0014] A power management module, used to control power switches related to the PON network;

[0015] Configuration management module, used to manage and configure the parameters and rules of the PON network;

[0016] The network construction includes the following terminals:

[0017] A processor, used for processing instructions and data related to the PON network;

[0018] A memory, used to store program codes, configuration information and status information related to the PON network;

[0019] PON terminal equipment is used to connect to power consumption equipment and distribution automation system in the distribution network through optical fiber;

[0020] The communication interface is used to realize the communication between the PON network and the distribution network.

[0021] Preferably, the link acquisition unit comprises

[0022] The crawler engine module is used to obtain the historical status information of the optical fiber in the distribution network PON network through the network crawler technology, and save the historical information to form an optical fiber information database;

[0023] The optical fiber monitoring module is used to monitor the optical fiber in real time using an optical time domain reflectometer, and transmit the data detected by the optical time domain reflectometer to the status processing unit through GPRS technology;

[0024] The history record module is used to record changes in the optical fiber status. When the optical fiber status changes, the status change is recorded by the history record module and stored in the optical fiber information database.

[0025] Preferably, the state processing unit includes:

[0026] The preprocessing module is used to preprocess the historical status information of the optical fiber to make the data set more regular and stable;

[0027] The state partitioning module is used to partition the preprocessed data set into multiple time periods in chronological order;

[0028] The threshold calculation module is used to calculate the average value and median of the state data in each time period, and perform weighted average on the average values ​​and medians of all time periods to obtain the average value and median of the state; and then determine the state warning threshold of the optical fiber according to the distribution of the average value and median of the state;

[0029] The fault diagnosis module is used to evaluate and warn the real-time status of the optical fiber according to the warning threshold. If the real-time status of the optical fiber exceeds the warning threshold, it indicates that there is a problem with the optical fiber, and the alarm information is promptly fed back to the intelligent protection unit.

[0030] Preferably, the state processing unit further includes:

[0031] An optical fiber parameter extraction module is used to retrieve the length change rate, loss change rate and connector state change rate contained in the optical fiber state information when the real-time state of the optical fiber does not exceed the warning threshold;

[0032] A loss comparison module, used to compare the loss change rate with a preset loss change risk warning threshold;

[0033] An optical fiber state abnormality coefficient acquisition module is used to obtain the optical fiber state abnormality coefficient by using the length change rate, loss change rate and connector state change rate when the loss change rate exceeds a preset loss change risk warning threshold;

[0034] The fiber state abnormality coefficient is obtained by the following formula:

[0035]

[0036] Where J represents the fiber state abnormality coefficient; S represents the loss change rate; S y Indicates the preset loss change risk warning threshold; L p Indicates the length change rate; Z p Indicates the rate of change of the joint state;

[0037] An abnormal coefficient comparison module, used for comparing the abnormal coefficient of the optical fiber state with a preset abnormal coefficient threshold;

[0038] The warning threshold adjustment module is used to adjust the warning threshold when the optical fiber state abnormality coefficient exceeds a preset abnormality coefficient threshold.

[0039] Preferably, the warning threshold adjustment module includes:

[0040] An early warning threshold calling module is used to call the early warning threshold when the abnormal coefficient of the optical fiber state exceeds a preset abnormal coefficient threshold;

[0041] The median retrieval module is used to retrieve the average and median of the length change rate, loss change rate and joint state change rate in each time period;

[0042] A threshold adjustment coefficient acquisition module is used to obtain a threshold adjustment coefficient by using the average and median of the length change rate, loss change rate and connector state change rate in each time period combined with the optical fiber state abnormality coefficient;

[0043] The threshold adjustment coefficient is obtained by the following formula:

[0044]

[0045] Where Q represents the threshold adjustment coefficient corresponding to the length, loss, and connection status; n represents the total number of time periods; X zi+1 Indicates i+ The median of the length change rate, loss change rate and joint status change rate corresponding to a time period; X zi represents the median of the length change rate, loss change rate and connector status change rate corresponding to the i-th time period; J represents the fiber status abnormality coefficient; X pi represents the average value of the length change rate, loss change rate and joint state change rate corresponding to the i-th time period; X pi+1 represents the average value of the length change rate, loss change rate and joint state change rate corresponding to the i+1th time period;

[0046] A warning threshold adjustment execution module is used to adjust the warning threshold using the threshold adjustment coefficient to obtain the adjusted warning threshold;

[0047] The adjusted warning threshold is obtained by the following formula:

[0048] Y t =(1+Q)·Y0;

[0049] Among them, Y t It represents the adjusted warning threshold corresponding to the length, loss and connection status; Y0 represents the warning threshold before adjustment corresponding to the length, loss and connection status; Q represents the threshold adjustment coefficient corresponding to the length, loss and connection status.

[0050] Preferably, the intelligent protection unit comprises:

[0051] A conditional trigger module is used to set a fault trigger condition according to the fault type of the main link in the historical status information of the optical fiber, and the conditions include: the single point failure risk of the main link, the load change of the main link, and the status of the main link;

[0052] The link switching module is used to switch the main optical fiber link to the backup optical fiber link when the optical fiber link triggers a fault condition.

[0053] Preferably, the timing feedback unit comprises:

[0054] The timing setting module is used to add a timer in the link collection unit, set the collection time interval and feedback cycle for the link collection unit, so that the link collection unit automatically triggers the status collection operation at the set time interval, and regularly feeds back the status information to the status processing unit for data analysis;

[0055] The frequency adjustment module is used to timely adjust the feedback cycle and time interval when an optical fiber fault is detected.

[0056] Preferably, the fault diagnosis module comprises:

[0057] The troubleshooting module is used to try to troubleshoot the optical fiber fault when the optical fiber fails, and feed back the troubleshooting result to the intelligent protection unit.

[0058] The method for intelligent protection based on distribution automation PON optical link is implemented based on the intelligent protection system based on distribution automation PON optical link according to any one of claims 1 to 9, and is characterized in that it includes the following steps:

[0059] Step S1: By establishing a PON network in the distribution network and connecting the power consumption equipment and the distribution automation system in the distribution network with optical fiber, remote communication and control are provided for the distribution network automation system;

[0060] Step S2: Calculate the historical status information of the optical fiber using the extraction of intermediate values ​​method to obtain the warning thresholds of various optical fiber states;

[0061] Step S3: setting a timing feedback mechanism for the link collection unit, after the link collection unit collects the state of the optical fiber in real time, it performs data feedback according to the feedback node timing;

[0062] Step S4: Based on each warning threshold, the real-time status of the optical fiber is evaluated and warned to obtain the current status information of the optical fiber;

[0063] Step S5: establishing a main optical fiber link and a backup optical fiber link, and setting a triggering condition for the backup optical fiber link;

[0064] Step S6: Based on the current optical fiber status information, if the current optical fiber link triggers a fault condition, the current optical fiber link is automatically switched from the main optical fiber link to the backup optical fiber link.

[0065] Compared with the prior art, the present invention has the following improvements and advantages:

[0066] 1. The present invention establishes a PON network in a distribution network, calculates the historical status information of the optical fiber to obtain the early warning threshold of each optical fiber status; establishes a main optical fiber link and a backup optical fiber link, and sets the triggering condition of the backup optical fiber link; the link acquisition unit acquires the status of the optical fiber in real time and provides feedback at regular intervals; the real-time status of the optical fiber is evaluated based on the early warning threshold, and if the optical fiber link triggers a fault condition, the current optical fiber link is automatically switched from the main optical fiber link to the backup optical fiber link, thereby ensuring the continuity of the power supply of the distribution network and improving the reliability of power supply.

[0067] 2. The present invention realizes the timed feedback of the link status by setting a timed feedback mechanism for real-time data, so that the status processing unit can receive the latest status information in time and make corresponding adjustments and optimizations according to the status information to ensure the stable operation of the distribution network. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Figure 1 This is a composition diagram of the intelligent protection system based on the distribution automation PON optical link of the present invention. DETAILED DESCRIPTION

[0069] The present invention is further summarized below with reference to the accompanying drawings.

[0070] In order to solve the technical problem that the PON optical link protection mechanism in the prior art needs to be regularly inspected and maintained to ensure that the backup link is available, but this increases the complexity and workload of operation and maintenance, and increases the deployment and maintenance costs of the overall network, such as Figure 1 As shown, this embodiment provides the following technical solutions:

[0071] Intelligent protection system based on distribution automation PON optical link, including:

[0072] The PON network construction unit is used to establish a PON network in the distribution network and connect the power-consuming equipment and the distribution automation system in the distribution network through optical fibers to achieve remote communication and control; at the same time, the topology design and protocol design of the PON network are performed to ensure the stability and security of the PON network; the PON network construction unit includes:

[0073] The network construction module is used to build a PON network in the distribution network. The network construction includes the following terminals: a processor, which is used to process instructions and data related to the PON network, and the processor is programmable; a memory, which is used to store program codes, configuration information and status information related to the PON network, and the memory is readable and writable; a PON terminal device, which is used to connect to the power-consuming equipment in the distribution network and the terminal equipment of the distribution automation system through optical fiber, and the PON terminal device can support the Ethernet protocol; a communication interface, which is used to realize the communication between the PON network and the distribution network, and the communication interface supports the Ethernet interface; specifically, the PON optical link is mainly composed of an optical line terminal OLT, an optical distribution network ODN, and a plurality of optical line terminals. The optical line terminal OLT is located on the network side, usually at the central office end, and is responsible for network concentration and access, completing optical / electrical conversion, bandwidth allocation and controlling the connection of each channel, and has real-time monitoring, management and maintenance functions; the optical distribution network ODN is located between the optical line terminal OLT and the optical network unit ONU, providing optical channels; the optical distribution network ODN is composed of passive devices such as optical splitters and does not contain any active electronic devices; the optical network unit ONU is located on the user side, responsible for receiving data sent by the optical line terminal OLT and directly providing services to users. After the optical network unit ONU completes registration, it is assigned a unique logical link identifier to distinguish different optical network units ONU.

[0074] The power management module is used to control the power switches related to the PON network; specifically, the power management module monitors the power supply voltage, current and other information in real time, and displays them on the monitoring screen of the distribution network in real time; the manager controls the power switches of all nodes in the PON network through remote control commands as needed to ensure their normal operation and avoid unnecessary power outages caused by excessive load. The load conditions of each node in the PON network can also be monitored through telemetry commands, and the power output of each node can be automatically adjusted according to the load conditions to ensure the power balance of the entire system; when an abnormality is found, an alarm can be issued in time to notify maintenance personnel to come for maintenance to avoid affecting normal power supply; in summary, the power management module can effectively control the power switches related to the PON network to ensure the stable operation of the PON network.

[0075] The configuration management module is used to manage and configure the parameters and rules of the PON network. Specifically, the configuration management module receives configuration instructions from the superior management system or other modules, parses and verifies the received configuration instructions, modifies the parameters and rules of the PON network according to the configuration instructions, and sends the modified parameters and rules to all nodes in the PON network.

[0076] The beneficial effects achieved by the above content are: by quickly building and deploying the PON network in the distribution network, the goal of intelligent and automated distribution network can be achieved. Without changing the existing distribution network architecture, the existing power consumption equipment and distribution automation system can be integrated into an intelligent PON network, thereby improving the reliability and efficiency of the distribution network. At the same time, the PON network can provide a more flexible network topology and higher bandwidth, so that the various nodes in the distribution network can be more conveniently interconnected and work together.

[0077] The link acquisition unit is used to obtain the historical status information of the optical fiber in the distribution network PON network through the network crawler technology to form an optical fiber information database; the optical fiber status information includes: length, loss, number of connectors and connection status; and the distribution automation system is used to monitor the status of the optical fiber in real time. The status of the optical fiber includes: changes in the length of the optical fiber, changes in loss and changes in the status of the connector. When an abnormal situation is found, the status processing unit will issue an alarm, which will be processed by the intelligent protection unit; the link acquisition unit includes:

[0078] The crawler engine module is used to obtain the historical status information of the optical fiber in the distribution network PON network through the web crawler technology, and save the historical information to form an optical fiber information database; specifically, the web crawler technology can obtain the optical fiber status information by accessing relevant web pages and other relevant databases, and extract valid information by parsing the web page content and save it in the optical fiber information database.

[0079] The optical fiber monitoring module is used to monitor the optical fiber in real time using an optical time domain reflectometer, and transmit the data detected by the optical time domain reflectometer to the status processing unit through GPRS technology; specifically, the optical time domain reflectometer is a non-destructive testing technology that can determine the breakpoints, joints and defects of the optical fiber by measuring the reflection time and amplitude of the optical signal. The optical time domain reflectometer can be used to monitor the status of the optical fiber in real time, such as: length, loss, number of joints and connection status. GPRS technology is a mobile communication technology that can transmit data from field equipment to the status processing unit; by combining the optical fiber status information detected by the optical time domain reflectometer with GPRS technology, the optical fiber status information can be uploaded to the distribution automation system and the status processing unit in real time.

[0080] The history record module is used to record changes in the optical fiber status. When the optical fiber status changes, the status change is recorded by the history record module and stored in the optical fiber information database.

[0081] The beneficial effects achieved by the above content are: by combining the optical time domain reflectometer and GPRS technology, the optical fiber status information can be remotely transmitted and analyzed while monitoring the optical fiber status in real time, so as to take appropriate measures, which will help to better manage and maintain the optical fiber resources in the distribution network and ensure the reliability of power supply. In addition, by recording the optical fiber status information, the use and maintenance requirements of the optical fiber can be deeply understood, providing useful reference information for subsequent maintenance and management.

[0082] The state processing unit is used to pre-process the historical state information of the optical fiber, and calculate the historical state information of the pre-processed optical fiber by extracting the intermediate value method, extract the warning threshold of each state of the optical fiber, and evaluate and warn the real-time state of the optical fiber based on each warning threshold to obtain the current state information of the optical fiber; the state processing unit includes:

[0083] The preprocessing module is used to preprocess the historical status information of the optical fiber, traverse and analyze the data stream, identify the abnormal or inconsistent data that needs to be preprocessed, and take corresponding preprocessing measures according to different abnormal or inconsistent situations, such as: removing duplicates, filling missing values, etc., and integrating and summarizing the preprocessed data to form a new data set, and feeding the new data set back to the state division module for the next step of processing; in summary, the optical fiber status information can be effectively preprocessed to make the data set more regular and stable, which is conducive to the subsequent analysis work to be carried out more accurately and reliably.

[0084] The state partitioning module is used to partition the preprocessed data set into multiple time periods in chronological order. The data in each time period represents a continuous time period and can be set according to actual conditions, such as one day, one week, one month, etc. In specific implementation, the data in each time period can be discretized, the states in the data set can be discretized, and the number of states can be reduced to a minimum, thereby simplifying the state calculation process and better reflecting the changing trend of the state.

[0085] The threshold calculation module is used to calculate the average value and median of the state data in each time period, and perform weighted average on the average values ​​and medians of all time periods to obtain the average value and median of the state; then determine the state warning threshold of the optical fiber according to the distribution of the state average value and median; specifically, determine the calculation method of the state warning threshold according to the change of historical state data, such as: using linear interpolation to calculate the state warning threshold, and performing weighted average calculation on the average value and median of each time period to consider the importance of state data in different time periods; such as: using the time weighted average method of weighted average to assign different weights to the data of each time period to reflect their importance; and determine the state warning threshold of the optical fiber according to the distribution of the state average value and median; such as: using statistical methods to analyze the state average value and median, and make a reasonable selection according to their distribution. Through the above steps, the state warning threshold can be effectively calculated, and the importance of state data in different time periods can be considered; and the state threshold of the optical fiber represents the normal range of the optical fiber in different states. If this threshold range is exceeded, it indicates that there may be a problem with the optical fiber.

[0086] The fault diagnosis module is used to evaluate and warn the real-time status of the optical fiber according to the warning threshold. If the real-time status of the optical fiber exceeds the warning threshold, it indicates that there is a problem with the optical fiber, and the alarm information is fed back to the intelligent protection unit in a timely manner; the fault diagnosis module includes:

[0087] The troubleshooting module is used to try to troubleshoot the optical fiber when a fault occurs in the optical fiber, and to feed back the troubleshooting results to the intelligent protection unit; for example: determine the type of fault, which can be determined based on factors such as the frequency and duration of the fault; analyze the cause of the fault, which can be analyzed based on historical records and the results of on-site investigations; take measures to troubleshoot the fault, which can be attempted by replacing the optical fiber, cleaning the optical fiber, repairing the optical fiber connector, etc.; record the troubleshooting results, which can record the troubleshooting process and results and save them in the database; update the fault status, which can update the status of the optical fiber to normal, and send the corresponding troubleshooting results to the intelligent protection unit. Through the above steps, the optical fiber fault can be effectively detected, and the results can be fed back to the intelligent protection unit in a timely manner when troubleshooting, so that the intelligent protection unit can take corresponding protection measures in a timely manner.

[0088] The beneficial effects achieved by the above content are: by effectively utilizing the historical status information of the optical fiber, the distribution network automation system is assisted to evaluate and warn the status of the optical fiber, thereby discovering problems in advance and avoiding the expansion of the problems.

[0089] Specifically, the state processing unit further includes:

[0090] An optical fiber parameter extraction module is used to retrieve the length change rate, loss change rate and connector state change rate contained in the optical fiber state information when the real-time state of the optical fiber does not exceed the warning threshold;

[0091] A loss comparison module, used to compare the loss change rate with a preset loss change risk warning threshold;

[0092] An optical fiber state abnormality coefficient acquisition module is used to obtain the optical fiber state abnormality coefficient by using the length change rate, loss change rate and connector state change rate when the loss change rate exceeds a preset loss change risk warning threshold;

[0093] The fiber status abnormality coefficient is obtained by the following formula:

[0094]

[0095] Where J represents the fiber state abnormality coefficient; S represents the loss change rate; S y Indicates the preset loss change risk warning threshold; L p Indicates the length change rate; Z p Indicates the rate of change of the joint state;

[0096] An abnormal coefficient comparison module, used for comparing the abnormal coefficient of the optical fiber state with a preset abnormal coefficient threshold;

[0097] The warning threshold adjustment module is used to adjust the warning threshold when the optical fiber state abnormality coefficient exceeds a preset abnormality coefficient threshold.

[0098] The technical effect of the above technical solution is: through the optical fiber parameter extraction module, the system can obtain the status information of the optical fiber in real time, including the length change rate, loss change rate and connector status change rate, but only when the real-time status of these parameters does not exceed the preliminarily set warning threshold. This mechanism helps to reduce unnecessary data processing, while ensuring that a certain monitoring accuracy can be maintained when the optical fiber status is initially judged to be normal. The loss comparison module can accurately assess the loss risk of the optical fiber by comparing the loss change rate with the preset loss change risk warning threshold. This is of great significance for timely discovering potential optical fiber loss problems and preventing signal quality degradation. When the loss change rate exceeds the warning threshold, the optical fiber status abnormality coefficient acquisition module uses the length change rate, loss change rate and connector status change rate to comprehensively calculate the optical fiber status abnormality coefficient (J). This comprehensive evaluation method is more accurate than a single parameter judgment and can more comprehensively reflect the actual status of the optical fiber.

[0099] Through the abnormal coefficient comparison module and the warning threshold adjustment module, the system can automatically adjust the warning threshold according to the abnormal coefficient of the fiber status. This adaptive mechanism helps the system maintain the accuracy and effectiveness of the warning when facing different environmental conditions and fiber aging. Overall, this technical solution improves the maintenance efficiency of the fiber optic network through real-time monitoring, accurate evaluation and intelligent adjustment. It can provide early warning before problems occur, reduce service interruptions caused by fiber failures, and thus reduce maintenance costs. Through comprehensive monitoring and early warning of fiber status, this technical solution helps to promptly discover and solve potential problems, thereby enhancing the stability and reliability of the fiber optic network.

[0100] In summary, this technical solution realizes comprehensive monitoring and early warning of optical fiber status through real-time monitoring, precise evaluation and intelligent adjustment mechanism, improves maintenance efficiency, reduces costs, and enhances network stability and reliability.

[0101] Specifically, the warning threshold adjustment module includes:

[0102] An early warning threshold calling module is used to call the early warning threshold when the abnormal coefficient of the optical fiber state exceeds a preset abnormal coefficient threshold;

[0103] The median retrieval module is used to retrieve the average and median of the length change rate, loss change rate and joint state change rate in each time period;

[0104] A threshold adjustment coefficient acquisition module is used to obtain a threshold adjustment coefficient by using the average and median of the length change rate, loss change rate and connector state change rate in each time period combined with the optical fiber state abnormality coefficient;

[0105] The threshold adjustment coefficient is obtained by the following formula:

[0106]

[0107] Where Q represents the threshold adjustment coefficient corresponding to the length, loss, and connection status; n represents the total number of time periods; X zi+1 represents the median of the length change rate, loss change rate and joint status change rate corresponding to the i+1th time period; X zi represents the median of the length change rate, loss change rate and connector status change rate corresponding to the i-th time period; J represents the fiber status abnormality coefficient; X pi represents the average value of the length change rate, loss change rate and joint state change rate corresponding to the i-th time period; X pi+1 represents the average value of the length change rate, loss change rate and joint state change rate corresponding to the i+1th time period;

[0108] A warning threshold adjustment execution module is used to adjust the warning threshold using the threshold adjustment coefficient to obtain the adjusted warning threshold;

[0109] The adjusted warning threshold is obtained through the following formula:

[0110] Y t =(1+Q)·Y0;

[0111] Among them, Y t It represents the adjusted warning threshold corresponding to the length, loss and connection status; Y0 represents the warning threshold before adjustment corresponding to the length, loss and connection status; Q represents the threshold adjustment coefficient corresponding to the length, loss and connection status.

[0112] The technical effect of the above technical solution is: through the median retrieval module and the average retrieval module, the system can obtain the median and average of the fiber state parameters in each time period, and these statistics reflect the change trend of the fiber state over time. The threshold adjustment coefficient acquisition module uses these statistics and the fiber state abnormality coefficient to calculate the threshold adjustment coefficient, so that the warning threshold can be dynamically adjusted according to the actual change of the fiber state, thereby improving the adaptability and accuracy of the system. By comprehensively considering the fiber state parameters (including the length change rate, the loss change rate and the connector state change rate) of multiple time periods and their medians and averages, the system can more comprehensively evaluate the state of the fiber, thereby more accurately adjusting the warning threshold. This comprehensive evaluation method helps to reduce false alarms and missed alarms and improve the accuracy and reliability of warnings. The technical solution realizes the intelligent adjustment of the warning threshold, which can be automatically adjusted according to the actual changes in the fiber state without manual intervention. This not only reduces the workload of maintenance personnel, but also improves the intelligence level of fiber network management. By dynamically adjusting the warning threshold, the system can better adapt to various uncertainties and changes in the fiber network, such as environmental changes, equipment aging, etc. This helps to improve the robustness and stability of the system and ensure the normal operation of the fiber network in a complex environment. Through accurate early warning and intelligent adjustment, the system can take timely measures when the fiber status is abnormal to avoid the problem from escalating, thereby optimizing resource utilization. This helps reduce service interruptions and resource waste caused by fiber failures.

[0113] In summary, this technical solution improves the accuracy and intelligence of fiber optic network monitoring by dynamically adjusting the warning threshold, enhances the robustness and stability of the system, optimizes resource utilization, and provides a strong guarantee for the reliable operation of the fiber optic network.

[0114] The intelligent protection unit is used to establish a fiber link fault protection mechanism, including: establishing a main fiber link and a backup fiber link, and setting the triggering conditions of the backup fiber link; based on the current fiber status information, if the current fiber link triggers a fault condition, the current fiber link is automatically switched from the main fiber link to the backup fiber link through the intelligent protection unit, so as to better ensure the stability and reliability of the power distribution communication network; the intelligent protection unit includes:

[0115] The conditional trigger module is used to set the fault trigger condition according to the fault type of the main link in the historical status information of the optical fiber; the conditions include: the single point failure risk of the main link, the load change of the main link and the status of the main link; specifically, the setting of the backup link is mainly to prevent the single point failure risk when the main link fails; therefore, the trigger condition of the backup link can be set as the failure of the main link, such as: the optical power is lower than the set threshold or is completely disconnected. Secondly, when the load of the main link suddenly increases or decreases to a certain extent, it may cause the risk of failure of the main link to increase, and the backup link can be started as an alternative. Furthermore, the backup link can also determine whether it needs to be switched according to the status of the main link, such as: when the main link has a serious failure, the backup link can be started as an alternative. Finally, the setting of the backup link needs to consider the time factor, such as: how long does the backup link need to take over the work of the main link so as to switch to the backup link in time to avoid power outages caused by the failure of the main link. In practical applications, the setting of the fault trigger condition can also be adjusted and optimized according to the specific situation to ensure that the trigger condition of the backup link can effectively guarantee the continuity of power supply. In summary, according to the preset triggering condition of the standby optical fiber link, the state of the current optical fiber link is judged, and if the triggering condition is met, it is considered that the optical fiber is faulty.

[0116] The link switching module is used to switch the main optical fiber link to the backup optical fiber link when the optical fiber link triggers a fault condition, thereby ensuring the continuity of power supply; at the same time, during the switching process, the intelligent protection unit also needs to continuously monitor the status of the optical fiber and the backup link to ensure the smooth progress of the switching process and prevent new faults caused by abnormalities in the switching process.

[0117] The beneficial effects achieved by the above contents are as follows: by setting the trigger conditions, it is possible to quickly switch to the backup link when a main link fails, thereby ensuring the continuity of power supply and improving the reliability of power supply.

[0118] The timing feedback unit is used to set a timing feedback mechanism for the link collection unit. After the link collection unit collects the state of the optical fiber in real time, it feeds back data to the state processing unit according to the feedback node timing. The timing feedback unit includes:

[0119] A timing setting module is used to add a timer to a link acquisition unit, set a collection time interval and a feedback cycle for the link acquisition unit, so that the link acquisition unit automatically triggers a status acquisition operation at a set time interval, determines the status update frequency of each link, and regularly feeds back the status information to the status processing unit for data analysis; specifically, by adding one or more timers to the link acquisition unit, and setting their trigger conditions and time intervals as needed; such as: setting the timer to automatically trigger the status acquisition operation at each hour, day, week, etc.; and adding a timed task to the operating system or application of the link acquisition unit, and setting the corresponding trigger condition in the operating system or application according to the time interval set by the timer, thereby setting the collection time interval and feedback cycle for the link acquisition unit, and automatically triggering the status acquisition operation at the set time interval, thereby realizing the determination of the status update frequency of each link, and being able to regularly feed back the status information to the status processing unit for data analysis.

[0120] The frequency adjustment module is used to timely adjust the feedback cycle and time interval when analyzing that a fiber optic fault occurs; specifically, it is used to determine whether a fiber optic fault occurs based on the fiber optic status analysis results obtained by the fault diagnosis module; after confirming that the fault has occurred, the frequency adjustment module makes corresponding adjustments to the feedback cycle and time interval according to actual needs; such as: increasing the feedback cycle or reducing the feedback cycle to better adapt to actual status changes; after adjusting the feedback cycle and time interval, the frequency adjustment module restarts the status acquisition operation to obtain the latest status information; through the above method, it is possible to respond to link status changes in a timely manner, and adjust the feedback cycle and time interval accordingly to adapt to changes in actual conditions, thereby ensuring the timeliness and accuracy of status information.

[0121] The beneficial effects achieved by the above content are: by setting a timed feedback mechanism for real-time data, timed feedback of the link status is achieved, so that the status processing unit can receive the latest status information in time, and make corresponding adjustments and optimizations based on the status information to ensure the stable operation of the distribution network.

[0122] In order to better demonstrate the operation process of the intelligent protection system based on the distribution automation PON optical link, the present invention provides an intelligent protection method based on the distribution automation PON optical link, comprising the following steps:

[0123] Step S1: By establishing a PON network in the distribution network and connecting the power consumption equipment and the distribution automation system in the distribution network with optical fiber, remote communication and control are provided for the distribution network automation system;

[0124] Step S2: Calculate the historical status information of the optical fiber using the extraction of intermediate values ​​method to obtain the warning thresholds of various optical fiber states;

[0125] Step S3: setting a timing feedback mechanism for the link collection unit, after the link collection unit collects the state of the optical fiber in real time, it performs data feedback according to the feedback node timing;

[0126] Step S4: Based on each warning threshold, the real-time status of the optical fiber is evaluated and warned to obtain the current status information of the optical fiber;

[0127] Step S5: establishing a main optical fiber link and a backup optical fiber link, and setting a triggering condition for the backup optical fiber link;

[0128] Step S6: Based on the current optical fiber status information, if the current optical fiber link triggers a fault condition, the current optical fiber link is automatically switched from the main optical fiber link to the backup optical fiber link.

[0129] The beneficial effects achieved by the above content are: by implementing intelligent protection for the distribution automation PON optical link, its role is to promptly detect and take measures when a fault occurs, prevent the fault from expanding, and ensure the continuity and stability of power supply.

[0130] Working principle: By establishing a PON network in the distribution network, the historical status information of the optical fiber is calculated to obtain the warning threshold of each optical fiber status; the main optical fiber link and the backup optical fiber link are established, and the triggering conditions of the backup optical fiber link are set; the link acquisition unit collects the status of the optical fiber in real time and provides feedback regularly; the real-time status of the optical fiber is evaluated based on the warning threshold. If the optical fiber link triggers a fault condition, the current optical fiber link is automatically switched from the main optical fiber link to the backup optical fiber link, thereby ensuring the continuity of the power supply of the distribution network and improving the reliability of power supply.

[0131] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. Intelligent protection system based on distribution automation PON optical link, characterized by: The intelligent protection system includes a PON network construction unit, which is used to establish a PON network in the distribution network and connect the power consumption equipment and the distribution automation system in the distribution network through optical fibers; The link collection unit is used to obtain the historical status information of the optical fiber in the distribution network PON network through the network crawler technology to form an optical fiber information database; The status information of the optical fiber includes: length, loss, number of connectors and connection status; and the status of the optical fiber is monitored in real time through the power distribution automation system. The status of the optical fiber includes: changes in the length of the optical fiber, changes in loss and changes in the status of the connector; The state processing unit is used to pre-process the historical state information of the optical fiber, and calculate the historical state information of the pre-processed optical fiber by extracting the intermediate value method, extract the warning threshold of each state of the optical fiber, and evaluate and warn the real-time state of the optical fiber based on each warning threshold to obtain the current state information of the optical fiber; The intelligent protection unit is used to establish a fiber link fault protection mechanism, including: establishing a main fiber link and a backup fiber link, and setting a triggering condition for the backup fiber link; based on the current fiber status information, if the current fiber link triggers a fault condition, the current fiber link is automatically switched from the main fiber link to the backup fiber link through the intelligent protection unit; The timing feedback unit is used to set a timing feedback mechanism for the link collection unit. After the link collection unit collects the state of the optical fiber in real time, it feeds back data to the state processing unit according to the feedback node timing.

2. According to claim 1, the intelligent protection system based on distribution automation PON optical link is characterized in that: The PON network construction unit comprises: Network construction module, used to build a PON network in the distribution network; A power management module, used to control power switches related to the PON network; Configuration management module, used to manage and configure the parameters and rules of the PON network; The network construction includes the following terminals: A processor, used for processing instructions and data related to the PON network; A memory, used to store program codes, configuration information and status information related to the PON network; PON terminal equipment is used to connect to power consumption equipment and distribution automation system in the distribution network through optical fiber; The communication interface is used to realize the communication between the PON network and the distribution network.

3. The intelligent protection system based on distribution automation PON optical link according to claim 1 is characterized in that: The link acquisition unit comprises The crawler engine module is used to obtain the historical status information of the optical fiber in the distribution network PON network through the network crawler technology, and save the historical information to form an optical fiber information database; The optical fiber monitoring module is used to monitor the optical fiber in real time using an optical time domain reflectometer, and transmit the data detected by the optical time domain reflectometer to the status processing unit through GPRS technology; The history record module is used to record changes in the optical fiber status. When the optical fiber status changes, the status change is recorded by the history record module and stored in the optical fiber information database.

4. The intelligent protection system based on distribution automation PON optical link according to claim 1 is characterized in that: The state processing unit comprises: The preprocessing module is used to preprocess the historical status information of the optical fiber to make the data set more regular and stable; The state partitioning module is used to partition the preprocessed data set into multiple time periods in chronological order; The threshold calculation module is used to calculate the average value and median of the state data in each time period, and perform weighted average on the average values ​​and medians of all time periods to obtain the average value and median of the state; and then determine the state warning threshold of the optical fiber according to the distribution of the average value and median of the state; The fault diagnosis module is used to evaluate and warn the real-time status of the optical fiber according to the warning threshold. If the real-time status of the optical fiber exceeds the warning threshold, it indicates that there is a problem with the optical fiber, and the alarm information is promptly fed back to the intelligent protection unit.

5. The intelligent protection system based on distribution automation PON optical link according to claim 4 is characterized in that: The state processing unit further includes: An optical fiber parameter extraction module is used to retrieve the length change rate, loss change rate and connector state change rate contained in the optical fiber state information when the real-time state of the optical fiber does not exceed the warning threshold; A loss comparison module, used to compare the loss change rate with a preset loss change risk warning threshold; An optical fiber state abnormality coefficient acquisition module is used to obtain the optical fiber state abnormality coefficient by using the length change rate, loss change rate and connector state change rate when the loss change rate exceeds a preset loss change risk warning threshold; The fiber state abnormality coefficient is obtained by the following formula: Where J represents the fiber state abnormality coefficient; S represents the loss change rate; S y Indicates the preset loss change risk warning threshold; L p Indicates the length change rate; Z p Indicates the rate of change of the joint state; An abnormal coefficient comparison module, used for comparing the abnormal coefficient of the optical fiber state with a preset abnormal coefficient threshold; The warning threshold adjustment module is used to adjust the warning threshold when the optical fiber state abnormality coefficient exceeds a preset abnormality coefficient threshold.

6. The intelligent protection system based on distribution automation PON optical link according to claim 5 is characterized in that: The warning threshold adjustment module includes: An early warning threshold calling module is used to call the early warning threshold when the abnormal coefficient of the optical fiber state exceeds a preset abnormal coefficient threshold; The median retrieval module is used to retrieve the average and median of the length change rate, loss change rate and joint state change rate in each time period; A threshold adjustment coefficient acquisition module is used to obtain a threshold adjustment coefficient by using the average and median of the length change rate, loss change rate and connector state change rate in each time period combined with the optical fiber state abnormality coefficient; The threshold adjustment coefficient is obtained by the following formula: Where Q represents the threshold adjustment coefficient corresponding to the length, loss, and connection status; n represents the total number of time periods; X zi+1 represents the median of the length change rate, loss change rate and joint status change rate corresponding to the i+1th time period; X zi represents the median of the length change rate, loss change rate and connector status change rate corresponding to the i-th time period; J represents the fiber status abnormality coefficient; X pi represents the average value of the length change rate, loss change rate and joint state change rate corresponding to the i-th time period; X pi+1 represents the average value of the length change rate, loss change rate and joint state change rate corresponding to the i+1th time period; A warning threshold adjustment execution module is used to adjust the warning threshold using the threshold adjustment coefficient to obtain the adjusted warning threshold; The adjusted warning threshold is obtained by the following formula: Y t =(1+Q)·Y0; Among them, Y t It represents the adjusted warning threshold corresponding to the length, loss and connection status; Y0 represents the warning threshold before adjustment corresponding to the length, loss and connection status; Q represents the threshold adjustment coefficient corresponding to the length, loss and connection status.

7. The intelligent protection system based on distribution automation PON optical link according to claim 1 is characterized in that: The intelligent protection unit comprises: A conditional trigger module is used to set a fault trigger condition according to the fault type of the main link in the historical status information of the optical fiber, and the conditions include: the single point failure risk of the main link, the load change of the main link, and the status of the main link; The link switching module is used to switch the main optical fiber link to the backup optical fiber link when the optical fiber link triggers a fault condition.

8. The intelligent protection system based on distribution automation PON optical link according to claim 1 is characterized in that: The timing feedback unit comprises: The timing setting module is used to add a timer in the link collection unit, set the collection time interval and feedback cycle for the link collection unit, so that the link collection unit automatically triggers the status collection operation at the set time interval, and regularly feeds back the status information to the status processing unit for data analysis; The frequency adjustment module is used to timely adjust the feedback cycle and time interval when an optical fiber failure is detected.

9. The intelligent protection system based on distribution automation PON optical link according to claim 4 is characterized in that: The fault diagnosis module comprises: The troubleshooting module is used to try to troubleshoot the optical fiber fault when the optical fiber fails, and feed back the troubleshooting result to the intelligent protection unit.

10. A method for intelligent protection based on distribution automation PON optical link, implemented based on the intelligent protection system based on distribution automation PON optical link according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step S1: By establishing a PON network in the distribution network and connecting the power consumption equipment and the distribution automation system in the distribution network with optical fiber, remote communication and control are provided for the distribution network automation system; Step S2: Calculate the historical status information of the optical fiber using the extraction of intermediate values ​​method to obtain the warning thresholds of various optical fiber states; Step S3: setting a timing feedback mechanism for the link collection unit, after the link collection unit collects the state of the optical fiber in real time, it performs data feedback according to the feedback node timing; Step S4: Based on each warning threshold, the real-time status of the optical fiber is evaluated and warned to obtain the current status information of the optical fiber; Step S5: establishing a main optical fiber link and a backup optical fiber link, and setting a triggering condition for the backup optical fiber link; Step S6: Based on the current optical fiber status information, if the current optical fiber link triggers a fault condition, the current optical fiber link is automatically switched from the main optical fiber link to the backup optical fiber link.

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