Intelligent optical fiber protection channel fault monitoring device and method

Abstract

The invention relates to the technical field of relay protection, in particular to an intelligent optical fiber protection channel fault monitoring device and method.The intelligent optical fiber protection channel fault monitoring device comprises a device body, and the device body is provided with optical power monitoring equipment, an optical splitter, a data acquisition module, an optical transmission channel, a data processing and analyzing module, a power module and an alarm notification module; the optical power monitoring equipment is used for realizing alarm monitoring of dynamic change of optical power, monitoring of operation performance of an optical cable and accurate positioning of a fault; the optical splitter is used for realizing original data acquisition; the data acquisition module is used for acquiring an optical signal output by an optical fiber splitter mounted at an outgoing line of an optical fiber distribution frame of the transformer substation; and the data processing and analyzing module is used for analyzing a set alarm threshold value, identifying abnormal data, judging an optical fiber state, positioning a fault and preliminarily judging a fault reason after receiving the data packet. According to the method, the fault handling efficiency of the relay protection optical fiber channel is improved, and the operation reliability of the relay protection channel is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of relay protection, and is an intelligent optical fiber protection channel fault monitoring device and method. Background Art

[0002] Under the current condition that the power communication optical fiber transmission network has been built and improved, optical fiber communication transmission has high speed and high reliability. It is an important way to solve the relay protection channel. It has been widely used in the field of line relay protection and has become one of the important factors related to the safe and stable operation of the power grid.

[0003] The operation of the relay protection multiplexing channel can be monitored in real time through the optical transmission network management, but the operation of the fiber-optic dedicated relay protection channel cannot be monitored in real time. Once the fiber-optic channel is interrupted, it will affect the data sampling and output of the protection device, causing false or refusal to operate. At present, fiber-optic protection channel failures can only be reported to the site level and the specific fault point cannot be accurately determined, which brings challenges to fault location and processing, affecting the safety and efficiency of power grid operation; and the fiber-optic operation and maintenance is mainly the responsibility of power communication. After the fiber is interrupted, the operator will discover it and notify the processing, which may cause processing delays, increase the risk of accidents and the scope of impact.

[0004] At present, dedicated optical fiber channels are widely used to transmit relay protection data. In order to ensure the normal operation of the communication of the power protection channel, the importance of monitoring the protection fiber core of the power system is more obvious. In the existing technology, the communication operation and maintenance personnel can only handle the fault after the fault is notified, and the fault handling time is relatively long. Specifically, there are the following disadvantages: (1) Low timeliness. After the power grid monitoring personnel discover the fault, they need to notify the corresponding operation duty personnel to go to the site for investigation and clarify the cause of the dedicated optical fiber channel fault before informing the communication operation and maintenance personnel. The operation and maintenance personnel then work with the communication dispatcher to investigate the cause of the fault, resulting in the protection of the optical fiber fault handling in a passive state, which makes the processing time unnecessary and increases the risk of accidents and the scope of impact. (2) Low accuracy. At present, the optical fiber protection channel fault can only be reported to the site level and the specific fault point cannot be accurately determined. The operation and maintenance personnel need to arrive at the site for investigation, which brings challenges to fault location and handling, affecting the safety and efficiency of power grid operation. Summary of the invention

[0005] The present invention provides an intelligent optical fiber protection channel fault monitoring device and method, which overcomes the shortcomings of the above-mentioned prior art and can effectively solve the problems of the prior art in which the communication operation and maintenance personnel are informed of the fault after the fact for processing, the fault handling time is long, and the timeliness and accuracy are low.

[0006] One of the technical solutions of the present invention is achieved by the following measures: an intelligent optical fiber protection channel fault monitoring device, including a device body, on which an optical power monitoring device, an optical splitter, a data acquisition module, an optical transmission channel, a data processing and analysis module, a power supply module and an alarm notification module are arranged; Among them, the optical power monitoring equipment is used to realize the alarm monitoring of dynamic changes in optical power, the monitoring of optical cable operation performance and the precise positioning of faults; Among them, the optical splitter is used to realize the original data collection; Among them, the data acquisition module is used to collect the optical signal output by the optical fiber splitter installed at the outlet of the optical fiber distribution frame of the substation; Among them, the optical transmission channel module is used to receive the splitter signal, decode it, convert it into an electrical signal, and record the data packet; The data processing and analysis module is used to analyze and set alarm thresholds, identify abnormal data, determine the fiber status and locate faults, and preliminarily determine the cause of the fault after receiving the data packet; Among them, the alarm notification module is used to send alarm information to the monitoring center according to the data analysis results to notify the maintenance personnel; The power module is used to supply power to the entire device.

[0007] The following is a further optimization and / or improvement of one of the above-mentioned technical solutions: The optical power monitoring device may include an alarm monitoring and analysis module, an optical fiber performance and fault monitoring module; Among them, the alarm monitoring and analysis module is used to realize the alarm monitoring of dynamic changes in optical power; Among them, the optical fiber performance and fault monitoring module is used to monitor the operation performance of the optical cable and accurately locate the fault.

[0008] The data acquisition module may include a data acquisition unit optical time domain reflectometer for receiving the splitter signal.

[0009] The second technical solution of the present invention is achieved by the following measures: an intelligent optical fiber protection channel fault monitoring method, comprising: Monitor the dynamic changes of optical power, monitor the operation performance of optical cables, and accurately locate faults; Receive the splitter signal, decode it, convert it into an electrical signal, and record the data packet; After receiving the data packet, analyze and set the alarm threshold, identify abnormal data, determine the fiber status and locate the fault, and preliminarily determine the cause of the fault; According to the data analysis results, the alarm information is sent to the monitoring center to notify the maintenance personnel.

[0010] The following is a further optimization and / or improvement of the second technical solution of the above invention: It can monitor the communication optical power in real time and cooperate with the no-light alarm of the optical terminal. The received communication light is regarded as the monitoring light. The optical power is separated by the optical coupling device on the ODF in front of the receiving optical terminal, and then sent to the computer for analysis and processing through the optical power alarm integrated acquisition unit to realize the alarm monitoring of the dynamic change of optical power.

[0011] The optical fiber to be tested can be selected through a programmable optical switch. After the route is selected, the OTDR emits the test light, which is then multiplexed into the transmission network through a wavelength division multiplexing device. The reflected wave of the test light is analyzed and processed by the computer-controlled OTDR to monitor the operating performance of the optical cable and accurately locate the fault.

[0012] The present invention can quickly and timely discover hidden faults, shorten the operation and maintenance cycle, and minimize the impact of faults. At the same time, it relies on power optical dedicated line transmission and software analysis platform to simplify the traditional fault handling process and improve work efficiency. The present invention can further improve the basis for optical fiber fault analysis and judgment. By integrating the optical fiber splitter and the optical fiber power monitoring device, it can be judged whether the fault belongs to the optical cable segment or the connection part between the optical fiber distribution frame and the relay protection device. The present invention further expands the optical fiber status monitoring, monitors the optical fiber fault status, and uses the optical power monitoring device to monitor the dynamic changes of optical power to give real-time alarms and operating performance as well as the precise positioning of faults, thereby improving the stability and fault handling efficiency of the power communication network and ensuring the quality and safety of communication. The present invention realizes intelligent optical fiber status alarm. Once abnormal parameters are monitored, relevant operation and maintenance personnel are notified in time through SMS, and the coordinates of the fault point are quickly located. Combined with the status of the communication side site, the fault type is preliminarily determined, thereby reducing the processing time, improving work efficiency, and ensuring the normal operation of power communication. The present invention improves the efficiency of relay protection optical fiber channel fault handling and ensures the reliability of relay protection channel operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of an intelligent optical fiber protection channel fault monitoring device according to an embodiment of the invention.

[0014] Figure 2 It is a schematic diagram of the data transmission process of the intelligent optical fiber protection channel fault monitoring device according to an embodiment of the invention.

[0015] The codes in the attached drawings are: 1 is the device body, 2 is the optical power monitoring equipment, 3 is the intelligent optical fiber protection channel fault monitoring device, 4 is the optical fiber distribution cabinet, and 5 is the pigtail. DETAILED DESCRIPTION

[0016] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0017] The present invention will be further described below in conjunction with embodiments: Embodiment 1: As attached Figure 1 , 2 As shown, the intelligent optical fiber protection channel fault monitoring device 3 includes a device body 1, on which are arranged an optical power monitoring device 2, an optical splitter, a data acquisition module, an optical transmission channel, a data processing and analysis module, a power module and an alarm notification module; in the present invention, the device body 1 is arranged between the optical fiber distribution frame and the relay protection device. Among them, the power module is electrically connected to the optical power monitoring device 2, the data acquisition module, and the data processing and analysis module respectively, the optical splitter is electrically connected to the data acquisition module, the data acquisition module is electrically connected to the data processing and analysis module, the data processing and analysis module is electrically connected to the alarm notification module, the data acquisition module is also electrically connected to the optical transmission channel module, and the optical transmission channel module is connected to the communication network management platform.

[0018] Among them, the optical power monitoring device 2 is used to realize the alarm monitoring of dynamic changes in optical power, the monitoring of the operating performance of the optical cable and the precise positioning of faults; in the present invention, the optical power monitoring device 2 includes an alarm monitoring and analysis module, an optical fiber performance and fault monitoring module; wherein the alarm monitoring and analysis module is used to realize the alarm monitoring of dynamic changes in optical power, which monitors the communication optical power in real time and cooperates with the light-free alarm of the optical terminal, regards the received communication light as the monitoring light, and uses a splitter coupling device on the ODF in front of the receiving optical terminal to extract 3% of the optical power, and then sends it to the computer analysis unit through the optical power alarm integrated acquisition unit (AIU) The optical fiber performance and fault monitoring module is used to monitor the operation performance of the optical cable and accurately locate the fault. It is realized by using a computer-controlled OTDR card and supporting optical devices (including optical switches, wavelength division multiplexers, filters, etc.). The monitoring computer selects the optical fiber to be tested through a programmable optical switch (OSU). After the route is selected, the OTDR emits a 1625nm detection light, which is then multiplexed into the transmission network through a wavelength division multiplexing device (WDM). The reflected wave of the detection light is analyzed and processed by the computer-controlled OTDR to monitor the operation performance of the optical cable and accurately locate the fault. The system of the optical power monitoring device 2 adopts an embedded system, which has the advantages of high efficiency, good stability, and good portability. It also contains a complete network protocol stack, which promotes the interoperability between a variety of different products.

[0019] Among them, the optical splitter is used to realize the original data collection, which is conducive to the later data collection, transmission and analysis; The data acquisition module is used to collect the optical signal output by the optical fiber splitter installed at the outlet of the optical fiber distribution frame of the substation; the splitter evenly transmits the optical signal from the optical fiber input end to the output end, effectively isolates each output port, reduces crosstalk between signals, and improves the signal integrity and stability of the entire system. The data acquisition module includes a data acquisition unit optical time domain reflectometer (OTDR) for receiving the splitter signal.

[0020] Among them, the optical transmission channel module is used to receive the splitter signal, decode it, convert it into electrical signals, and record data packets; specifically, the data acquisition unit optical time domain reflectometer (OTDR) can be deployed behind the splitter to receive the optical fiber signal, decode it, convert it into electrical signals, and record data packets including optical fiber power and abnormal data. The data packets are reported to the communication monitoring center through the switch, all using TCP / IP and other protocols.

[0021] Among them, the data processing and analysis module is used to use AI algorithm analysis to set alarm thresholds after receiving data packets, identify abnormal data, judge the optical fiber status and locate faults, and preliminarily determine the cause of the fault; in the present invention, the cause of the fault can be preliminarily determined in combination with the communication transmission network management R-LOS alarm.

[0022] Among them, the alarm notification module is used to send alarm information to the monitoring center according to the data analysis results to notify the maintenance personnel; in the present invention, the maintenance personnel can be notified by text message.

[0023] The power module is used to supply power to the entire device. The power module adopts the internationally advanced modular design, plug-in structure, and dual power structure. All circuit boards support hot plugging, which greatly facilitates system maintenance. With dual power hot backup, when one power supply fails, the other power supply automatically bears the entire power load, which will not affect the continuous operation of the system.

[0024] When in use, the device is installed at the interface of the optical fiber distribution frame in the protection optical fiber station. Among them, the optical power monitoring device 2 realizes the alarm monitoring of the dynamic change of optical power, the monitoring of the operating performance and the precise positioning of the fault; the optical splitter realizes the original data collection, which is conducive to the later data collection, transmission and analysis; the data collection module collects the data of the optical fiber splitter and the optical power monitoring device 2 and sends it to the monitoring center; the data processing and analysis module analyzes the received data, and when abnormal information is detected, it quickly locates the abnormal position, discovers the hidden fault in time, and shortens the operation and maintenance cycle; the power supply module provides power to each module; the alarm notification module sends the alarm details to the relevant operation and maintenance personnel in the form of text messages according to the data analysis results of the background monitoring center.

[0025] The intelligent optical fiber protection channel fault monitoring device 3 can quickly and timely discover hidden faults, shorten the operation and maintenance cycle, and minimize the impact of faults. At the same time, it relies on power optical dedicated line transmission and software analysis platform to simplify the traditional fault handling process and improve work efficiency. The present invention can further improve the basis for optical fiber fault analysis and judgment, and judge whether the fault belongs to the optical cable section or the connection part between the optical fiber distribution frame and the relay protection device by integrating the optical fiber splitter and the optical fiber power monitoring device. The present invention further expands the optical fiber state monitoring, monitors the optical fiber fault state, and uses the optical power monitoring device 2 to monitor the dynamic change of optical power to give real-time alarms and operating performance as well as the precise positioning of faults, thereby improving the stability and fault handling efficiency of the power communication network and ensuring the quality and safety of communication. The present invention realizes the intelligent alarm of optical fiber state. Once abnormal parameters are monitored, the relevant operation and maintenance personnel are notified in time through SMS, and the coordinates of the fault point are quickly located. Combined with the status of the communication side site, the fault type is preliminarily determined, thereby reducing the processing time, improving work efficiency, and ensuring the normal operation of power communication. The present invention improves the efficiency of relay protection optical fiber channel fault handling and ensures the reliability of relay protection channel operation.

[0026] Embodiment 2: This embodiment provides a method for monitoring faults in an intelligent optical fiber protection channel, comprising: Alarm monitoring of dynamic changes in optical power, monitoring of optical cable operating performance, and precise positioning of faults; specifically, real-time monitoring of communication optical power and coordination with the optical terminal's no-light alarm, the received communication light is regarded as monitoring light, 3% of the optical power is separated by a splitter coupling device on the ODF in front of the receiving optical terminal, and then sent to the computer for analysis and processing through the optical power alarm integrated acquisition unit (AIU), to achieve alarm monitoring of dynamic changes in optical power; computer-controlled OTDR cards and supporting optical devices (including optical switches, wavelength division multiplexers, filters, etc.) are used to achieve this. Specifically, the optical fiber to be tested is selected through a programmable optical switch (OSU), and after routing is selected, the OTDR emits 1625nm detection light, which is then multiplexed into the transmission network through a wavelength division multiplexing device (WDM), and the reflected wave of the detection light is analyzed and processed by the computer-controlled OTDR, to achieve monitoring of optical cable operating performance and precise positioning of faults.

[0027] Receive the splitter signal, decode it, convert it into an electrical signal, and record the data packet; the data packet contains location and abnormality information, which is reported to the communication monitoring center through the in-station optical transmission module.

[0028] After receiving the data packet, AI algorithm analysis is used to set the alarm threshold, identify abnormal data, judge the fiber status and locate the fault, and preliminarily determine the cause of the fault; in the present invention, the cause of the fault can be preliminarily determined in combination with the communication transmission network management R-LOS alarm.

[0029] According to the data analysis results, the alarm information is sent to the monitoring center to notify the maintenance personnel.

[0030] The intelligent optical fiber protection channel fault monitoring method realizes the intelligent alarm of optical fiber status. Once abnormal parameters are monitored, relevant operation and maintenance personnel are notified by SMS in a timely manner, and the coordinates of the fault point are quickly located. Combined with the status of the communication side site, the fault type is preliminarily determined, thereby reducing processing time, improving work efficiency, and ensuring the normal operation of power communication. The present invention improves the efficiency of handling relay protection optical fiber channel faults and ensures the reliability of relay protection channel operation.

[0031] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. An intelligent optical fiber protection channel fault monitoring device, characterized in that The device comprises a device body, on which are arranged optical power monitoring equipment, an optical splitter, a data acquisition module, an optical transmission channel, a data processing and analysis module, a power supply module and an alarm notification module; Among them, the optical power monitoring equipment is used to realize the alarm monitoring of dynamic changes in optical power, the monitoring of optical cable operation performance and the precise positioning of faults; Among them, the optical splitter is used to realize the original data collection; Among them, the data acquisition module is used to collect the optical signal output by the optical fiber splitter installed at the outlet of the optical fiber distribution frame of the substation; Among them, the optical transmission channel module is used to receive the splitter signal, decode it, convert it into an electrical signal, and record the data packet; The data processing and analysis module is used to analyze and set alarm thresholds, identify abnormal data, determine the fiber status and locate faults, and preliminarily determine the cause of the fault after receiving the data packet; Among them, the alarm notification module is used to send alarm information to the monitoring center according to the data analysis results to notify the maintenance personnel; The power module is used to supply power to the entire device.

2. The intelligent optical fiber protection channel fault monitoring device according to claim 1 is characterized in that The optical power monitoring equipment includes an alarm monitoring and analysis module, and an optical fiber performance and fault monitoring module; Among them, the alarm monitoring and analysis module is used to realize the alarm monitoring of dynamic changes in optical power; Among them, the optical fiber performance and fault monitoring module is used to monitor the operation performance of the optical cable and accurately locate the fault.

3. The intelligent optical fiber protection channel fault monitoring device according to claim 1 is characterized in that The data acquisition module comprises a data acquisition unit optical time domain reflectometer, which is used for receiving the splitter signal.

4. The intelligent optical fiber protection channel fault monitoring device according to claim 1 is characterized in that The data acquisition module comprises a data acquisition unit optical time domain reflectometer, which is used for receiving the splitter signal.

5. An intelligent optical fiber protection channel fault monitoring method, characterized in that include: Monitor the dynamic changes of optical power, monitor the operation performance of optical cables, and accurately locate faults; Receive the splitter signal, decode it, convert it into an electrical signal, and record the data packet; After receiving the data packet, analyze and set the alarm threshold, identify abnormal data, determine the fiber status and locate the fault, and preliminarily determine the cause of the fault; According to the data analysis results, the alarm information is sent to the monitoring center to notify the maintenance personnel.

6. The intelligent optical fiber protection channel fault monitoring method according to claim 1, characterized in that Real-time monitoring of communication optical power and coordination with the optical terminal's light-out alarm, the received communication light is regarded as monitoring light, and the optical power is separated by a splitter coupling device on the ODF in front of the receiving optical terminal. The optical power is then sent to the computer for analysis and processing through the optical power alarm integrated acquisition unit to realize alarm monitoring of dynamic changes in optical power.

7. The intelligent optical fiber protection channel fault monitoring method according to claim 1, characterized in that The optical fiber to be tested is selected through a programmable optical switch. After the route is selected, the OTDR emits the test light, which is then multiplexed into the transmission network through a wavelength division multiplexing device. The reflected wave of the test light is analyzed and processed by the computer-controlled OTDR to monitor the operating performance of the optical cable and accurately locate the fault.

8. The intelligent optical fiber protection channel fault monitoring method according to claim 1, characterized in that The optical fiber to be tested is selected through a programmable optical switch. After the route is selected, the OTDR emits the test light, which is then multiplexed into the transmission network through a wavelength division multiplexing device. The reflected wave of the test light is analyzed and processed by the computer-controlled OTDR to monitor the operating performance of the optical cable and accurately locate the fault.

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