Power distribution communication network fault detection and hardware self-healing system and method

Abstract

The invention relates to the technical field of switch fault monitoring, and discloses a power distribution communication network fault detection and hardware self-healing system and method. An optical cable terminal processing system is arranged on each switch which is connected in series; signal detection is carried out on a signal transmission path of a power distribution communication network through the optical cable terminal processing system, a fault problem existing on the signal transmission path is found in time so as to achieve the purposes of real-time monitoring and fault diagnosis, when a detection result is that a switch hardware fault occurs, optical path switching operation is carried out, a fault switch is isolated, and the fault switch is prevented from being damaged. Therefore, the fault switch is bypassed, the front-stage switch path and the rear-stage switch path are conducted, link communication is recovered, and self-healing when the switch hardware fails is achieved. According to the invention, fault monitoring processing and link automatic recovery are carried out on the signal transmission path of the power distribution communication network, so that the reliability of the power distribution communication network is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of switch fault monitoring, and particularly to a power distribution communication network fault detection and hardware self-healing system and method. Background Art

[0002] With the wide application of distribution network automation technology, the reliability of the power distribution communication network is becoming increasingly important. Since power distribution communication devices are usually arranged according to the distribution of power distribution equipment, and medium-voltage distribution lines are usually radiated in the form of links, and not all distribution rooms or switch stations are equipped with automatic switches, the current power distribution communication network is mainly single-link radiation; although according to the current requirements for the construction of the communication network, it is ultimately necessary to build a ring network, but the ring network points are usually at the end of a single link, and it still operates in a single link during normal operation and cannot achieve real-time switching. For a communication network with a single link that is not looped, once a device in the link goes offline, the entire link will go offline; for a ring network, it will also cause short-term offline. Currently, for the switch offline repair technology, mainly a standby link is adopted, or the internal software of the switch is used to switch and reorganize the network. The former requires investing in another set of communication equipment to form a standby network, with a large investment; the latter is only applicable to software failures of the switch. When there are hardware failures of the switch or some serious software failures, the re-adaptive network formation will also fail. For the power distribution communication network, based on the current statistics of fault situations, the vast majority are caused by hardware failures, such as DC power supply failures, AC / DC module damage, interface loosening, etc. For the above hardware failures, the above methods can only use manual item-by-item troubleshooting and manual repair. Due to the influence of the power distribution network structure, once a hardware failure occurs, the affected range is large, the switch offline time is long, the fault troubleshooting time is long, and sometimes it takes several days to handle, which will have a great impact on services such as power distribution automation and intelligent power distribution rooms. Summary of the Invention

[0003] The present invention provides a power distribution communication network fault detection and hardware self-healing system and method, which solves the technical problem of how to improve the reliability of the power distribution communication network.

[0004] A power distribution communication network fault detection and hardware self-healing system provided by the first aspect of the present invention includes at least one serially connected switch link;

[0005] Each switch in the switch link is connected to an optical cable terminal processing system;

[0006] The optical cable terminal processing system is used to detect the signal transmission path of the power distribution communication network to generate a detection result. When the detection result is a switch hardware failure, an optical path switching operation is performed.

[0007] Optionally, the optical cable terminal processing system includes an optical cable incoming line processing device and an optical cable outgoing line processing device;

[0008] The optical cable inlet processing device accesses the incoming optical cable;

[0009] The optical cable inlet processing device is connected to the signal input end of the switch;

[0010] The signal output end of the switch is connected with the optical cable outlet processing device;

[0011] The optical cable outlet processing device accesses the outgoing optical cable.

[0012] Optionally, the optical cable inlet processing device includes a first optoelectronic conversion module, a first signal amplifier, a first electrical signal processing module, a second electrical signal processing module, a circuit switching switch, a first electro-optical conversion module and an integrated processing unit;

[0013] The incoming optical cable accesses the first optoelectronic conversion module;

[0014] The first output end of the first optoelectronic conversion module is communicatively connected to the circuit switching switch;

[0015] The first output end of the circuit switching switch is communicatively connected to the first electro-optical conversion module;

[0016] The first electro-optical conversion module is communicatively connected to the signal input end of the switch;

[0017] The second output end of the first optoelectronic conversion module is communicatively connected to the first signal amplifier;

[0018] The first signal amplifier is communicatively connected to the first electrical signal processor;

[0019] The second output ends of the first electrical signal processing module, the second electrical signal processing module and the circuit switching switch are all communicatively connected to the integrated processing unit;

[0020] The integrated processing unit is used to perform signal detection on the signal transmission path of the power distribution communication network, generate a detection result, and the detection result includes normal system operation, front-end device or optical cable failure, switch inlet interface failure and switch hardware failure;

[0021] The circuit switching switch is used to perform an incoming line cut-off switching operation in accordance with a preset switching sequence when performing signal detection on the signal transmission path of the power distribution communication network.

[0022] Optionally, the optical cable inlet processing device further includes an optical path direct-through switch communicatively connected to the integrated processing unit;

[0023] The optical path direct switch is used to perform an optical path switching operation when the detection result determines that there is a switch hardware failure.

[0024] Optionally, the optical cable inlet processing device further includes a delay module communicatively connected to the comprehensive processing unit;

[0025] The delay module is used to perform a hierarchical delay optical path switching operation when the detection results of multiple switches on the serial connection link all indicate failures.

[0026] Optionally, the optical cable inlet processing device further includes a communication module communicatively connected to the comprehensive processing unit;

[0027] The communication module is used to perform fault feedback.

[0028] Optionally, the optical cable inlet processing device further includes a first power supply;

[0029] The first power supply is used to provide a working power supply for the optical cable inlet processing device.

[0030] Optionally, the optical cable outlet processing device includes a second electro-optical conversion module, an electrical splitting interface, a second opto-electrical conversion module, a second signal amplifier, and an optical splitting interface;

[0031] The electrical signal output end of the switch is communicatively connected to the second electro-optical conversion module through the electrical splitting interface;

[0032] The second electro-optical conversion module accesses the outlet optical cable through the optical splitting interface;

[0033] The electrical splitting interface is communicatively connected to the second signal amplifier;

[0034] The first output end of the second signal amplifier is communicatively connected to the second opto-electrical conversion module;

[0035] The second opto-electrical conversion module is communicatively connected to the optical splitting interface;

[0036] The second output end of the second signal amplifier is communicatively connected to the second electrical signal processing module;

[0037] The optical signal output end of the switch is communicatively connected to the optical splitting interface.

[0038] Optionally, the optical cable outlet processing device further includes a second power supply;

[0039] The second power supply is used to provide a working power supply for the optical cable outlet processing device.

[0040] A fault detection and hardware self-healing method applied to the distribution communication network fault detection and hardware self-healing system provided in the second aspect of the present invention includes:

[0041] Perform signal detection on the signal transmission path of the distribution communication network to generate a detection result;

[0042] When the detection result is a switch hardware fault, perform an optical path switching operation.

[0043] From the above technical solutions, it can be seen that the present invention has the following advantages:

[0044] The present invention provides a distribution communication network fault detection and hardware self-healing system and method. By providing an optical cable terminal processing system on each of the serially connected switches, during the operation of the distribution communication network, the optical cable terminal processing system performs signal detection on the signal transmission path of the distribution communication network to timely discover the fault problems existing on the signal transmission path, so as to achieve the purpose of real-time monitoring and fault diagnosis. When the detection result is a switch hardware fault, an optical path switching operation is performed, then the faulty switch is isolated, thereby bypassing the faulty switch, conducting the paths of the front and rear stage switches, and restoring link communication, realizing self-healing when the switch has a hardware fault; the present invention improves the reliability of the distribution communication network by performing fault monitoring and processing on the signal transmission path of the distribution communication network and automatically restoring the link. Description of the Drawings

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0046] Figure 1 Schematic diagram of the connection between the optical cable terminal processing system and the switch in the embodiment of the present invention;

[0047] Figure 2 Normal logic diagram of the system operation in the embodiment of the present invention;

[0048] Figure 3 Front-end device or optical cable fault logic diagram in the embodiment of the present invention;

[0049] Figure 4 Switch incoming line interface fault logic diagram in the embodiment of the present invention;

[0050] Figure 5 Switch hardware fault logic diagram in the embodiment of the present invention;

[0051] Figure 6Schematic diagram of the link delay coordination of the serially connected switches according to the embodiments of the present invention;

[0052] Figure 7 Flowchart of the steps of a fault detection and hardware self-healing method for a power distribution communication network fault detection and hardware self-healing system according to the embodiments of the present invention;

[0053] Among them, the meanings of the reference numerals are as follows:

[0054] 1. First power supply; 2. First optoelectronic conversion module; 3. First signal amplifier; 4. First electrical signal processing module; 5. Second electrical signal processing module; 6. Circuit switching switch; 7. First electro-optical conversion module; 8. Optical path through switch; 9. Comprehensive processing unit; 10. Communication module; 11. Delay module; 12. Second power supply; 13. Second electro-optical conversion module; 14. Electrical shunt interface; 15. Second optoelectronic conversion module; 16. Second signal amplifier; 17. Optical shunt interface. Detailed implementation manners

[0055] The embodiments of the present invention provide a power distribution communication network fault detection and hardware self-healing system and method, which are used to solve the technical problem of how to improve the reliability of the power distribution communication network.

[0056] In order to make the objectives, features, and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the embodiments described below are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0057] Currently, for the switch offline repair technology, mainly a standby link is adopted, or the internal software of the switch is used to switch and reorganize the network. The former requires another set of communication equipment to form a standby network, with a large investment; the latter is only applicable to software failures of the switch. When there are hardware failures or some serious software failures of the switch, the re-adaptive networking will also fail. For the power distribution communication network, based on the current statistics of fault situations, most of them are caused by hardware failures, such as DC power supply failures, AC / DC module damage, interface looseness, etc. For the above hardware failures, the above methods can only use manual item-by-item troubleshooting and manual repair. Due to the influence of the power distribution network structure, once a hardware failure occurs, the affected range is large, the switch offline time is long, the fault troubleshooting time is long, and sometimes it takes several days to handle, which will have a great impact on services such as power distribution automation and intelligent power distribution rooms.

[0058] The present invention provides a fault detection and hardware self-healing system and method for a distribution communication network. When it is detected that the switch has no signal output, the optical fiber interface will be automatically switched. And when there is a hardware failure of the switch or some serious software failures, a device that can automatically jump the current switch to the next switch and a method for automatically restoring the link are provided. Without adding a standby link and without modifying the original switch, the off-line automatic monitoring and automatic repair functions of the switch can be realized with the minimum investment. For software failures, hardware failures, DC power supply failures, etc. of the switch, the off-line automatic monitoring and automatic repair functions can be realized.

[0059] Please refer to Figure 1 and Figure 6 , a fault detection and hardware self-healing system for a distribution communication network provided by the present invention includes at least one serial-connected switch link;

[0060] Each switch in the switch link is connected to an optical cable terminal processing system;

[0061] The optical cable terminal processing system is used to detect signals on the signal transmission path of the distribution communication network, generate a detection result, and perform an optical path switching operation when the detection result is a hardware failure of the switch.

[0062] The serial-connected switch link refers to a switch link composed of multiple switches connected in series.

[0063] The distribution communication network refers to a communication network used to transmit control, monitoring, protection and other information in the power distribution system. It is usually composed of multiple switches, optical cables, optical cable terminal processing systems and other devices, and is responsible for transmitting data between various nodes of the distribution system. The main functions of the distribution communication network include real-time monitoring of the status of power equipment, transmission of control commands, fault diagnosis and alarm, etc. to ensure the safe, stable and efficient operation of the power system.

[0064] The signal transmission path refers to the physical or logical path through which data is transmitted from the source node to the target node in the distribution communication network.

[0065] The optical path switching operation refers to the process in which the system automatically switches the signal transmission to the next-level communication path when a hardware failure of the switch is detected in the current signal transmission path.

[0066] In the embodiments of the present invention, each switch connected in series is provided with an optical cable terminal processing system. When the power distribution communication network is running, the optical cable terminal processing system detects signals on the signal transmission path of the power distribution communication network, and timely discovers the fault problems existing on the signal transmission path, so as to achieve the purpose of real-time monitoring and fault diagnosis. When the detection result is a switch hardware fault, an optical path switching operation is performed, and the faulty switch is isolated, thereby bypassing the faulty switch, conducting the paths of the front and rear stage switches, and restoring link communication, realizing self-healing when the switch has a hardware fault; through the fault monitoring and processing of the signal transmission path of the power distribution communication network and the automatic restoration of the link, the reliability of the power distribution communication network is improved in the present invention.

[0067] Please refer to Figure 1 and Figure 2 , a power distribution communication network fault detection and hardware self-healing system provided by the present invention, the optical cable terminal processing system includes an optical cable incoming line processing device and an optical cable outgoing line processing device;

[0068] The optical cable incoming line processing device accesses the incoming line optical cable;

[0069] The optical cable incoming line processing device is connected to the signal input end of the switch;

[0070] The signal output end of the switch is connected with an optical cable outgoing line processing device;

[0071] The optical cable outgoing line processing device accesses the outgoing line optical cable.

[0072] It should be noted that the optical cable terminal processing system is composed of an optical cable incoming line processing device and an optical cable outgoing line processing device. The optical cable incoming line processing device is connected to the optical cable outgoing line processing device through the switch. The incoming line optical cable accesses the optical cable incoming line processing device. The optical cable incoming line processing device is installed at the front end of the switch incoming line. The optical cable incoming line processing device is responsible for collecting and detecting the signals of the incoming line optical cable accessed. It is the main part of the optical cable terminal processing system to realize logical judgment and actions. The outgoing line optical cable accesses the optical cable outgoing line processing device. The optical cable outgoing line processing device is installed at the rear end of the switch outgoing line, and mainly processes the relevant signals output by the switch to realize the feedback of the output signals to the optical cable incoming line processing device.

[0073] Please refer to Figures 1-5 , a power distribution communication network fault detection and hardware self-healing system provided by the present invention, the optical cable incoming line processing device includes a first optoelectronic conversion module 2, a first signal amplifier 3, a first electrical signal processing module 4, a second electrical signal processing module 5, a circuit switching switch 6, a first electro-optical conversion module 7 and a comprehensive processing unit 9;

[0074] The incoming line optical cable accesses the first optoelectronic conversion module 2;

[0075] The first output terminal of the first optoelectronic conversion module 2 is communicatively connected to the circuit switching switch 6;

[0076] The first output terminal of the circuit switching switch 6 is communicatively connected to the first electro-optical conversion module 7;

[0077] The first electro-optical conversion module 7 is communicatively connected to the signal input terminal of the switch;

[0078] The second output terminal of the first optoelectronic conversion module 2 is communicatively connected to the first signal amplifier 3;

[0079] The first signal amplifier 3 is communicatively connected to the first electrical signal processor;

[0080] The first electrical signal processing module 4, the second electrical signal processing module 5, and the second output terminal of the circuit switching switch 6 are all communicatively connected to the integrated processing unit 9;

[0081] The integrated processing unit 9 is configured to perform signal detection on the signal transmission path of the power distribution communication network, generate a detection result, and the detection result includes normal system operation, front-end device or optical cable failure, switch incoming line interface failure, and switch hardware failure;

[0082] The circuit switching switch 6 is configured to perform an incoming line notch switching operation in accordance with a preset switching sequence when performing signal detection on the signal transmission path of the power distribution communication network.

[0083] The optical cable outgoing line processing device includes a second electro-optical conversion module 13, an electrical splitting interface 14, a second optoelectronic conversion module 15, a second signal amplifier 16, and an optical splitting interface 17;

[0084] The electrical signal output terminal of the switch is communicatively connected to the second electro-optical conversion module 13 through the electrical splitting interface 14;

[0085] The second electro-optical conversion module 13 accesses the outgoing line optical cable through the optical splitting interface 17;

[0086] The electrical splitting interface 14 is communicatively connected to the second signal amplifier 16;

[0087] The first output terminal of the second signal amplifier 16 is communicatively connected to the second optoelectronic conversion module 15;

[0088] The second optoelectronic conversion module 15 is communicatively connected to the optical splitting interface 17;

[0089] The second output terminal of the second signal amplifier 16 is communicatively connected to the second electrical signal processing module 5;

[0090] The optical signal output terminal of the switch is communicatively connected to the optical splitting interface 17.

[0091] It should be noted that the optical cable inlet processing device is installed at the front end of the optical cable inlet of the switch; the first optoelectronic conversion module 2 converts the optical signal of the incoming optical cable into an electrical signal for convenient processing.

[0092] It should be noted that the circuit switching switch 6 is responsible for switching the processed electrical signal path. One of the switches is in the normally closed state, and the rest are in the normally open state, and they have fixed serial numbers in sequence. The switching method can be preset in advance, including the switching interval time, the number of switches, the switching sequence, etc.; the circuit switching switch 6 is controlled by the comprehensive processing unit 9, input by the first electro-optical conversion module 7, and output to the optical splitter interface 17 at the optical signal output end of the switch, realizing the direct connection from the input to the output of the switch.

[0093] It should be noted that the comprehensive processing unit 9 is the logical judgment and comprehensive control center of the entire optical cable terminal processing system. First, it is responsible for comprehensively judging the input and output electrical signals to determine whether the input and output are normal through the electrical signals; second, if the signal is judged to be abnormal, it determines the fault type through the built-in rules. According to the functions of this device, three fault types can be preset: front-end device or optical cable fault, switch inlet interface fault, and switch hardware fault; third, it controls the switching or closing of relevant switches according to logical judgment. The comprehensive processing unit 9 can take different treatment measures according to different fault types. For a front-end device or optical cable fault, only send the front-end device or optical cable fault information to the operation and maintenance personnel through the communication module 10. For a switch inlet interface fault, control the circuit switching switch 6 to perform interface switching, and send the switch inlet interface fault information to the operation and maintenance personnel through the communication module 10. For a switch hardware fault, control the optical path direct connection switch 8 to close to realize the direct connection of the optical path between the input and output of the switch, and send the switch hardware fault information to the operation and maintenance personnel through the communication module 10. For multiple switches in the same serial link with faults, the delay module 11 can also be used to set a delay to realize the sequential direct connection of multiple switches and restore link communication.

[0094] It should be noted that the first electro-optical conversion module 7 converts the electrical signal into an optical signal and inputs it into the switch, or inputs the optical signal into the optical path direct connection switch 8, and the first optoelectronic conversion module 2 is controlled by the comprehensive processing unit 9.

[0095] It should be noted that the first signal amplifier 3 amplifies the electrical signal converted from the optical signal; the first electrical signal processing mainly processes the electrical signal input from the incoming optical cable and converted into an amplified electrical signal; the second electrical signal processing mainly processes the electrical signal output by the switch or the electrical signal converted and amplified through the output optical signal.

[0096] It should be noted that if the switch outputs an electrical signal, the electrical splitting interface 14 of the optical cable outgoing line processing device can input the electrical signal into the second electro-optical conversion module 13 and output it to the second signal amplifier 16 at the same time, and the amplified electrical signal is fed back to the optical cable incoming line processing device for comprehensive judgment.

[0097] It should be noted that if the switch outputs an optical signal, the optical splitting interface 17 of the optical cable outgoing line processing device can directly output the optical signal to the outgoing optical cable, and can output the optical signal to the second opto-electronic conversion module 15 at the same time, and then output the electrical signal to the second signal amplifier 16, and the amplified electrical signal is fed back to the optical cable incoming line processing device for comprehensive judgment.

[0098] It should be noted that the second electro-optical conversion module 13 converts the electrical signal into an optical signal and outputs it to the optical cable outgoing line processing device.

[0099] It should be noted that the second opto-electronic conversion module 15 converts the optical signal into an electrical signal and outputs it to the second signal amplifier 16, and the amplified electrical signal is fed back to the optical cable incoming line processing device for comprehensive judgment.

[0100] In the embodiment of the present invention, please refer to Figure 2 , the optical cable incoming line processing device is installed at the front end of the incoming optical cable of the switch, and the incoming optical cable is connected to the first opto-electronic conversion module 2 of the optical cable incoming line processing device and converted into an electrical signal for convenient processing; after passing through the circuit switching switch 6, one of the switches is in a normally closed state, and then it is converted into an optical signal through the first electro-optical conversion module 7 and input into the switch; the optical cable outgoing line processing device is installed at the signal output end of the switch (the signal output end of the switch includes the electrical signal output end and the optical signal output end of the switch), and may output an electrical signal or an optical signal. If it outputs an electrical signal, it is connected to the second electro-optical conversion module 13 through the electrical splitting interface 14 and then to the optical splitting interface 17. If the switch outputs an optical signal, it directly reaches the optical splitting interface 17 and then connects to the outgoing optical cable through the optical splitting interface 17.

[0101] Please refer to Figure 3, the incoming optical cable is converted into an electrical signal by the first optoelectronic conversion module 2 in the optical cable incoming line processing device, and the electrical signal is connected to the first signal amplifier 3 (since the signal received by the photodetector is generally very weak, and the signal output by optoelectronic conversion often contains a lot of clutter, therefore, to process such a weak signal, it is generally necessary to first perform pre-amplification to the voltage amplitude required by the first electrical signal processing module 4, that is, the function of the first signal amplifier 3), and is connected to the comprehensive processing unit 9 through the first electrical signal processing module 4 (the amplified signal needs to be further processed, and the first electrical signal processing module 4 is mainly a filter circuit, in which the filter circuit uses a second-order band-pass filter to process the signal to remove environmental clutter outside the useful signal frequency band and clutter introduced by the first signal amplifier 3). If the signal is abnormal, it is determined that there is a front-end switch failure or an optical cable failure. At the same time, the communication module 10 sends information about the front-end switch failure or optical cable failure to the operation and maintenance personnel.

[0102] Please refer to Figure 4, the incoming fiber optic cable is connected to the first optoelectronic conversion module 2 of the fiber optic cable incoming line processing device, passes through the circuit switching switch 6, one of the switches is in a normally closed state, and then is converted into an optical signal by the first electro-optical conversion module 7 and input into the switch; the fiber optic cable outgoing line processing device is installed at the signal output end of the switch, which may be an electrical signal output end or an optical signal output end. If it is an electrical signal output, the electrical signal is connected to the second signal amplifier 16 through the electrical shunt interface 14; if it is an optical signal output, the optical signal is connected to the second optoelectronic conversion module 15 through the optical shunt interface 17 and then connected to the second signal amplifier 16; the second signal amplifier 16 transmits the amplified electrical signal to the second electrical signal processing module 5, and then to the comprehensive processing unit 9. The comprehensive processing unit 9 comprehensively analyzes the electrical signal data of the first electrical signal processing module 4 and the second electrical signal processing module 5 (the analysis process is mainly to compare the amplitudes and frequencies of the electrical signals on both sides. If after the same amplification factor, there are large abnormalities in the amplitudes and frequencies of the signals on both sides, or there is no input signal in the second electrical signal processing module 5, it can be judged that there is a fault in the switch signal input or output). If the electrical signal at the analysis output end is abnormal, first perform an incoming line interface switch (perform the incoming line cut-off switch operation according to the preset switch order, which can also be understood as switching according to the preset serial number. Each path of the circuit switching switch 6 corresponds to a different interface between the "first sub-electro-optical conversion module" and the "switch". Each time a switch is switched, the corresponding interface also switches. That is, there are first sub-electro-optical conversion modules with the corresponding number of interfaces in the first electro-optical conversion module 7. By reasonably allocating the switching order of the interfaces, the load balancing of the power distribution communication network traffic can be achieved, avoiding overload of a certain interface or path, and improving the efficiency of the overall power distribution communication network. It is worth mentioning that all interfaces are connected to each other to form a multi-path network, thus forming a mesh topology structure, improving the redundancy and fault tolerance of the power distribution communication network), and at the same time open the normally closed switch to complete the interface switch of the switch; at the same time, cycle through the above signal detection steps. If the signal feedback by the comprehensive processing unit 9 returns to normal within 2 minutes, it is judged as a switch interface fault (or loose wiring), and at the same time the communication module 10 sends the switch interface fault information to the operation and maintenance personnel; if the signal feedback by the comprehensive processing unit 9 is still abnormal within 2 minutes, repeat the above steps to switch the interface again (send the corresponding interface number after switching. Each time the interface is switched and there is still an abnormality, the fault information and whether the switch is successful will be sent to the operation and maintenance personnel at the same time, facilitating the operation and maintenance personnel to remotely understand the on-site situation). At the same time, the communication module 10 sends the switch interface fault information to the operation and maintenance personnel.

[0103] Please refer to Figure 5, if the feedback signal of the interface switching comprehensive processing unit 9 is still abnormal after two times of processing, it is determined as a hardware failure of the switch. If it still fails to resume online after the above-mentioned switch interface fault detection process, it is determined as a hardware failure of the switch. At this time, after the electrical signal is judged as abnormal by the comprehensive processing unit 9, it is connected to the optical path through-switch 8 through the electro-optical conversion module. The comprehensive processing unit 9 controls the optical path through-switch 8 to close. The optical path through-switch 8 is connected to the optical splitting interface 17 at the switch outlet, and directly passes through the optical cable inlet of the next-level switch (that is, isolating the faulty switch, conducting the paths of the front and rear switches, and restoring link communication). At the same time, the communication module 10 sends the switch hardware failure information to the operation and maintenance personnel.

[0104] Please refer to Figures 1-5 , in a power distribution communication network fault detection and hardware self-healing system provided by the present invention, the optical cable inlet processing device further includes an optical path through-switch 8 communicatively connected to the comprehensive processing unit 9;

[0105] The optical path through-switch 8 is used to perform an optical path switching operation when the detection result determines that there is a hardware failure of the switch.

[0106] It should be noted that the optical path through-switch 8 communicatively connected to the comprehensive processing unit 9 is used to control the optical path through-switch 8 to close when the detection result determines that there is a hardware failure of the switch. The optical path through-switch 8 is connected to the optical splitting interface 17 at the switch outlet, and directly passes through the optical cable inlet of the next-level switch, isolating the faulty switch and restoring link communication.

[0107] Please refer to Figure 1 and Figure 6 , in a power distribution communication network fault detection and hardware self-healing system provided by the present invention, the optical cable inlet processing device further includes a delay module 11 communicatively connected to the comprehensive processing unit 9;

[0108] The delay module 11 is used to perform a hierarchical delay optical path switching operation when the detection results of multiple switches on the serial connection link all show faults.

[0109] The hierarchical delay optical path switching operation refers to an intelligent switching strategy for multiple switches on the serial connection link detected with faults simultaneously. It is a process of gradually switching the signal to the next-level communication path by means of hierarchical delay.

[0110] It should be noted that through delay setting, the input and output optical signals of the multi-level faulty switch links can be directly connected one by one.

[0111] In the embodiment of the present invention, please refer to Figure 6, through the delay module 11, the serial switches can also achieve straight-through cooperation in sequence. If there are multiple faults in a serial-connected switch, the switch will achieve straight-through cooperation in sequence through the delay module 11. Starting from the first-level switch of the optical signal source, Δt (4 min) is increased in sequence. If the signal has not returned to normal after N * Δt (4N min), the straight-through switches will be turned on in sequence to achieve straight-through of the upper and lower optical paths.

[0112] Please refer to Figures 1-5 , for a power distribution communication network fault detection and hardware self-healing system provided by the present invention, the optical cable inlet processing device further includes a communication module 10 communicatively connected to the comprehensive processing unit 9;

[0113] The communication module 10 is used for fault feedback.

[0114] It should be noted that the communication module 10 is a wireless communication and can feedback the fault information to the set operation and maintenance personnel in real time.

[0115] Please refer to Figures 1-5 , for a power distribution communication network fault detection and hardware self-healing system provided by the present invention, the optical cable inlet processing device further includes a first power supply 1;

[0116] The first power supply 1 is used to provide a working power supply for the optical cable inlet processing device.

[0117] The optical cable outlet processing device further includes a second power supply 12;

[0118] The second power supply 12 is used to provide a working power supply for the optical cable outlet processing device.

[0119] It should be noted that the first power supply 1 is used to provide a working power supply for the optical cable inlet processing device, and the second power supply 12 is used to provide a working power supply for the optical cable outlet processing device.

[0120] The present invention has the following advantages:

[0121] 1. The power distribution communication network fault detection and hardware self-healing system of the present invention can realize online monitoring of the on-off state of switches. When it detects that there is no (optical / electrical) signal output from the switch, it will automatically realize automatic switching of optical fiber interfaces to solve the problem of link interruption caused by loose or damaged interfaces.

[0122] 2. When the switch hardware fails, the DC cabinet fails and there is no power supply, or some serious software failures cause the inability to achieve re-networking at the software level, the current switch can be automatically jumped to the next switch to achieve automatic link recovery and isolate the current faulty switch.

[0123] 3. The power distribution communication network fault detection and hardware self-healing system provided by the present invention does not need to add redundant links according to the traditional method, greatly reducing equipment investment; nor does it require internal modification of the original switch. With the minimum investment, it realizes the functions of offline automatic monitoring and automatic repair of the switch. For software faults, hardware faults, DC power supply faults, etc. of the switch, it can realize the functions of offline automatic monitoring and automatic repair of the switch fault isolation link.

[0124] Please refer to Figure 7 , a fault detection and hardware self-healing method applied to a power distribution communication network fault detection and hardware self-healing system provided by the present invention, includes:

[0125] Step 101: Detect the signal transmission path of the power distribution communication network to generate a detection result.

[0126] Step 102: When the detection result is a switch hardware fault, perform an optical path switching operation.

[0127] In the embodiment of the present invention, each serially connected switch is provided with an optical cable terminal processing system. When the power distribution communication network is running, the optical cable terminal processing system detects the signal transmission path of the power distribution communication network to timely discover the fault problems existing on the signal transmission path, so as to achieve the purpose of real-time monitoring and fault diagnosis. When the detection result is a switch hardware fault, an optical path switching operation is performed, then the faulty switch is isolated, so as to bypass the faulty switch, conduct the paths of the front and rear stage switches, and restore link communication, realizing self-healing when the switch has a hardware fault; the present invention improves the reliability of the power distribution communication network by performing fault monitoring processing and link automatic recovery on the signal transmission path of the power distribution communication network.

[0128] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the above-described systems, devices, and units can refer to the corresponding processes in the foregoing method embodiments, and will not be described herein again.

[0129] In several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division, and there can be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point, the displayed or discussed mutual coupling or direct coupling or communication connection can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be in electrical, mechanical or other forms.

[0130] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A power distribution communication network fault detection and hardware self-healing system, characterized in that: including at least one serially connected switch link; Each switch in the switch link is connected to an optical cable terminal processing system; The optical cable terminal processing system is used to perform signal detection on the signal transmission path of the power distribution communication network and generate a detection result. When the detection result is a switch hardware failure, an optical path switching operation is performed.

2. The power distribution communication network fault detection and hardware self-healing system according to claim 1, characterized in that: The optical cable terminal processing system comprises an optical cable incoming line processing device and an optical cable outgoing line processing device; The optical cable incoming line processing device is connected to the incoming optical cable; The optical cable incoming line processing device is connected to the signal input terminal of the switch; The signal output end of the switch is connected to the optical cable outlet processing device; The optical cable outlet processing device is connected to the outlet optical cable.

3. The power distribution communication network fault detection and hardware self-healing system according to claim 2, characterized in that: The optical cable incoming line processing device comprises a first photoelectric conversion module, a first signal amplifier, a first electrical signal processing module, a second electrical signal processing module, a circuit switching switch, a first electrical-optical conversion module and a comprehensive processing unit; The incoming optical cable is connected to the first photoelectric conversion module; The first output end of the first photoelectric conversion module is communicatively connected to the circuit switching switch; The first output end of the circuit switching switch is communicatively connected to the first electro-optical conversion module; The first electro-optical conversion module is communicatively connected to the signal input terminal of the switch; The second output end of the first photoelectric conversion module is communicatively connected to the first signal amplifier; The first signal amplifier is communicatively connected to the first electrical signal processor; The first electrical signal processing module, the second electrical signal processing module and the second output end of the circuit switching switch are all communicatively connected to the integrated processing unit; The comprehensive processing unit is used to perform signal detection on the signal transmission path of the power distribution communication network and generate detection results, wherein the detection results include normal system operation, front-end equipment or optical cable failure, switch incoming line interface failure and switch hardware failure; The circuit switching switch is used to perform incoming line cut-out switching operations according to a preset switching sequence when performing signal detection on the signal transmission path of the power distribution communication network.

4. The power distribution communication network fault detection and hardware self-healing system according to claim 3, characterized in that: The optical cable incoming line processing device also includes an optical path direct switch which is communicatively connected to the comprehensive processing unit; The optical path direct switch is used to perform an optical path switching operation when the detection result determines that there is a switch hardware failure.

5. The power distribution communication network fault detection and hardware self-healing system according to claim 3, characterized in that: The optical cable incoming line processing device also includes a delay module that is communicatively connected to the integrated processing unit; The delay module is used to perform a hierarchical delay optical path switching operation when the detection results of multiple switches on the serial connection link are all faulty.

6. The power distribution communication network fault detection and hardware self-healing system according to claim 3, characterized in that: The optical cable incoming line processing device also includes a communication module that is communicatively connected to the integrated processing unit; The communication module is used for fault feedback.

7. The power distribution communication network fault detection and hardware self-healing system according to claim 3, characterized in that: The optical cable incoming line processing device also includes a first power supply; The first power supply is used to provide working power for the optical cable incoming line processing device.

8. The power distribution communication network fault detection and hardware self-healing system according to claim 3, characterized in that: The optical cable outlet processing device comprises a second electro-optical conversion module, an electrical branching interface, a second photoelectric conversion module, a second signal amplifier and an optical branching interface; The electrical signal output end of the switch is communicatively connected with the second electrical-optical conversion module via the electrical branch interface; The second electro-optical conversion module is connected to the outgoing optical cable through the optical branch interface; The electrical shunt interface is communicatively connected with the second signal amplifier; The first output terminal of the second signal amplifier is communicatively connected to the second photoelectric conversion module; The second photoelectric conversion module is communicatively connected with the optical branching interface; The second output terminal of the second signal amplifier is communicatively connected to the second electrical signal processing module; The optical signal output end of the switch is communicatively connected to the optical branching interface.

9. The power distribution communication network fault detection and hardware self-healing system according to claim 8, characterized in that: The optical cable outlet processing device also includes a second power supply; The second power supply is used to provide working power for the optical cable outlet processing device.

10. A fault detection and hardware self-healing method applied to the power distribution communication network fault detection and hardware self-healing system according to any one of claims 1 to 9, characterized in that: include: Performing signal detection on a signal transmission path of a power distribution communication network and generating a detection result; When the detection result is a switch hardware failure, an optical path switching operation is performed.

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