CN112653234A - Optical fiber monitoring system for transformer substation - Google Patents

Optical fiber monitoring system for transformer substation Download PDF

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Publication number
CN112653234A
CN112653234A CN202011367680.2A CN202011367680A CN112653234A CN 112653234 A CN112653234 A CN 112653234A CN 202011367680 A CN202011367680 A CN 202011367680A CN 112653234 A CN112653234 A CN 112653234A
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CN
China
Prior art keywords
secondary device
signal
optical
optical fiber
analog electrical
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Pending
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CN202011367680.2A
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Chinese (zh)
Inventor
付强
马文浩
卢刚刚
苏玉忠
陈远
高雯
赵通汉
赵志东
马嘉
马强
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Guyuan Power Supply Co Of State Grid Ningxia Electric Power Co ltd
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Guyuan Power Supply Co Of State Grid Ningxia Electric Power Co ltd
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Priority to CN202011367680.2A priority Critical patent/CN112653234A/en
Publication of CN112653234A publication Critical patent/CN112653234A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
    • H02J13/00017—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus using optical fiber
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/16—Electric power substations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses

Abstract

The embodiment of the application provides an optical fiber monitoring system for transformer substation, includes: the system comprises an optical fiber monitoring management machine, a background monitoring subsystem and a plurality of secondary devices in a transformer substation, wherein the optical fiber monitoring management machine is respectively connected with each secondary device in the plurality of secondary devices through an optical fiber, and a connection relation is formed between the optical fiber monitoring management machine and the background monitoring subsystem; the optical fiber monitoring management machine is used for monitoring the optical signal attenuation state between every two secondary devices in the plurality of secondary devices; and the background monitoring subsystem is used for judging whether the optical fiber signal transmission between the secondary devices fails according to the optical signal attenuation state information. According to the embodiment of the application, the monitoring of the optical fiber link between the secondary devices in the transformer substation is realized, and the fault of the optical fiber link can be found in time.

Description

Optical fiber monitoring system for transformer substation
Technical Field
The application relates to the technical field of intelligent substations, in particular to an optical fiber monitoring system for a substation.
Background
The intelligent substation is constructed by layering intelligent primary equipment and networked secondary equipment, wherein the primary equipment mainly realizes the functions of generating electricity, transmitting electricity, distributing electricity and the like of the substation, the secondary equipment mainly plays the roles of assisting, protecting and monitoring, and in order to realize information sharing and mutual operation between the primary equipment and the secondary equipment in the substation, the secondary equipment transmits data through optical fibers.
However, in practical applications, the optical fiber link may fail due to the material of the optical fiber. Once the optical fiber link fails, data transmission among the secondary devices is necessarily affected, and therefore the dispatching end of the substation cannot monitor and protect the primary devices monitored by the secondary devices.
If the optical fiber link between the secondary devices in the transformer substation can be effectively monitored, and the fault existing in the optical fiber link can be timely found, the fault existing in the optical fiber link can be processed as soon as possible, so that the influence of the fault existing in the optical fiber link on data transmission between the secondary devices can be reduced.
Therefore, how to monitor the optical fiber link between the secondary devices in the substation is a problem to be solved.
Disclosure of Invention
The embodiment of the application provides an optical fiber monitoring system for a transformer substation to realize monitoring of an optical fiber link between secondary equipment in the transformer substation.
The embodiment of the application provides an optical fiber monitoring system for transformer substation, includes: the system comprises an optical fiber monitoring management machine, a background monitoring subsystem and a plurality of secondary devices in a transformer substation, wherein the optical fiber monitoring management machine is respectively connected with each secondary device in the plurality of secondary devices through an optical fiber, and a connection relation is formed between the optical fiber monitoring management machine and the background monitoring subsystem;
the optical fiber monitoring and managing machine is used for monitoring the optical signal attenuation state between every two secondary devices in the plurality of secondary devices, and comprises an optical signal sampling unit, a central control unit and a network unit;
the optical signal sampling unit is configured to obtain a first optical signal that is sent by a first secondary device of the multiple secondary devices to a second secondary device of the multiple secondary devices, convert the first optical signal into a first digital signal, send the first digital signal to the central control unit, obtain a second optical signal that is sent by the second secondary device to the first secondary device, convert the second optical signal into a second digital signal, and send the second digital signal to the central control unit;
the central control unit is configured to obtain optical signal attenuation state information between the first secondary device and the second secondary device according to the first digital signal and the second digital signal, and send the optical signal attenuation state information to the network unit;
the network unit is used for sending the optical signal attenuation state information to the background monitoring subsystem;
and the background monitoring subsystem is used for judging whether the optical fiber signal transmission between the first secondary equipment and the second secondary equipment fails or not according to the optical signal attenuation state information.
Optionally, the optical signal sampling unit includes a photoelectric converter, a potentiometer, an amplifier and an analog-to-digital converter;
the photoelectric converter is used for converting the first optical signal into a first analog electrical signal, sending the first analog electrical signal to the potentiometer, converting the second optical signal into a second analog electrical signal, and sending the second analog electrical signal to the potentiometer;
the potentiometer is used for adjusting the voltage of the first analog electrical signal to obtain a first analog electrical signal after the voltage is adjusted, sending the first analog electrical signal after the voltage is adjusted to the amplifier, adjusting the voltage of the second analog electrical signal to obtain a second analog electrical signal after the voltage is adjusted, and sending the second analog electrical signal after the voltage is adjusted to the amplifier;
the amplifier is used for amplifying the power of the first analog electrical signal after voltage adjustment to obtain a first analog electrical signal after power amplification, sending the first analog electrical signal after power amplification to the analog-to-digital converter, amplifying the power of the second analog electrical signal after voltage adjustment to obtain a second analog electrical signal after power amplification, and sending the second analog electrical signal after power amplification to the analog-to-digital converter;
the analog-to-digital converter is used for converting the first analog electric signal after power amplification into a first digital signal, sending the first digital signal to the central control unit, converting the second analog electric signal after power amplification into a second digital signal, and sending the second digital signal to the central control unit.
Optionally, the optical signal sampling unit still includes the optical splitter, the optical splitter be used for with first secondary equipment sends the first light signal of second secondary equipment is divided into two ways first light signal along separate routes, will one way first light signal among two ways first light signal sends for photoelectric converter, will another way first light signal among two ways first light signal sends for setting up be used for receiving in the optical fiber monitoring supervisor second light signal with will first light signal sends for the port of second secondary equipment, and will second secondary equipment sends the second light signal of first secondary equipment is divided into two ways second light signal along separate routes, will one way second light signal among two ways second light signal sends for photoelectric converter, will another way second light signal among two ways second light signal sends for setting up be used for receiving in the optical fiber monitoring supervisor first light signal with will second light signal sends first light signal with will A port to the first secondary device.
Optionally, the central control unit is specifically configured to compare signal characteristic information of the first digital signal with signal characteristic information of the second digital signal, obtain characteristic difference information between the first digital signal and the second digital signal, and generate optical signal attenuation state information between the first secondary device and the second secondary device according to the characteristic difference information between the first digital signal and the second digital signal.
Optionally, the background monitoring subsystem is specifically configured to determine whether the optical signal attenuation state indicated by the optical signal attenuation state information satisfies a preset fault alarm condition, and if so, determine that the optical fiber signal transmission between the first secondary device and the second secondary device fails.
Optionally, the background monitoring subsystem is further configured to output a prompt message indicating that the optical fiber signal transmission between the first secondary device and the second secondary device fails if it is determined that the optical fiber signal transmission between the first secondary device and the second secondary device fails.
Optionally, the background monitoring subsystem is further configured to send, if it is determined that optical fiber signal transmission between the first secondary device and the second secondary device fails, indication information for indicating to start a standby optical fiber link between the first secondary device and the second secondary device for optical signal transmission to the first secondary device and the second secondary device, respectively.
Optionally, the background monitoring subsystem is further configured to obtain running state information, which is reported by the multiple secondary devices in the substation and used for representing the primary devices in the substation, and determine whether the first secondary device reports the running state information of the first primary device monitored by the first secondary device on time and whether the second secondary device reports the running state information of the second primary device monitored by the second secondary device on time;
the background monitoring subsystem is further configured to determine a fault point at which optical fiber signal transmission between the first secondary device and the second secondary device fails according to a determination result of whether the first secondary device timely reports operating state information of the first primary device monitored by the first secondary device and a determination result of whether the second secondary device timely reports operating state information of the second primary device monitored by the second secondary device, if it is determined that optical fiber signal transmission between the first secondary device and the second secondary device fails.
Optionally, if the first secondary device does not report the running state information of the first primary device monitored by the first secondary device on time, determining that the first secondary device is the fault point;
or if the second secondary device does not report the running state information of the second primary device monitored by the second secondary device on time, determining that the second secondary device is the fault point.
Optionally, the plurality of secondary devices in the substation include at least one device of a switch, a remote controller, a merging unit, a protection device, and a time-giving device.
In the optical fiber monitoring system for the transformer substation provided by the embodiment of the application, the optical fiber monitoring management machine is respectively connected with each secondary device in a plurality of secondary devices in the transformer substation through optical fibers and monitors the optical signal attenuation state between every two secondary devices, and the background monitoring subsystem judges whether the optical fiber signal transmission between every two secondary devices fails according to the optical signal attenuation state information, so that the monitoring of the optical fiber link between the secondary devices in the transformer substation is realized, and the fault of the optical fiber link can be found in time. Once the fault existing in the optical fiber link is found, the fault existing in the optical fiber link can be processed as soon as possible, so that the influence of the fault existing in the optical fiber link on data transmission between the secondary devices can be reduced.
Drawings
Fig. 1 is a schematic logical structure diagram of an optical fiber monitoring system for a substation according to an embodiment of the present application;
FIG. 2 is a schematic logical structure diagram of an optical fiber monitoring management machine according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a logic structure of an optical signal sampling unit according to an embodiment of the present application.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of implementation in many different ways than those herein set forth and of similar import by those skilled in the art without departing from the spirit of this application and is therefore not limited to the specific implementations disclosed below.
The embodiment of the application provides an optical fiber monitoring system for a transformer substation. For ease of understanding, a brief description of a practical application scenario of the fiber monitoring system of the substation will be given first.
In practical application, the transformer is used as the core of a transformer substation, and is influenced by numerous factors, so that a series of fault problems are easily caused, the normal power supply of the transformer substation is further influenced, even large-scale power failure can be caused, the normal power utilization of people is influenced, and meanwhile, huge loss is brought to a power enterprise. Under the condition, the transformer is primary equipment of the transformer substation, and the protection, auxiliary and monitoring equipment is secondary equipment, so that the normal operation of the secondary equipment is very important, the secondary equipment needs to be matched with each other, the secondary equipment is connected through optical fibers, and the optical fiber monitoring system of the transformer substation monitors the states of optical fiber links and optical fiber interfaces between the secondary equipment.
The optical fiber monitoring system for the substation provided by the embodiment of the present application is described in detail below with reference to fig. 1, fig. 2, and fig. 3.
As shown in fig. 1, a fiber optic monitoring system 10 for a substation includes: the system comprises an optical fiber monitoring management machine 101, secondary equipment 102 and a background monitoring subsystem 103.
The optical fiber monitoring and managing machine 101 is respectively connected with each secondary device in the plurality of secondary devices through an optical fiber, and a connection relationship is formed between the optical fiber monitoring and managing machine 101 and the background monitoring subsystem 103; for monitoring the optical signal attenuation state between each two secondary devices of the plurality of secondary devices 102.
As shown in fig. 2, the fiber monitoring management machine 101 includes an optical signal sampling unit 1011, a central control unit 1012, and a network unit 1013.
The optical signal sampling unit 1011 is configured to obtain a first optical signal sent by a first secondary device of the two secondary devices to a second secondary device, convert the first optical signal into a first digital signal, send the first digital signal to the central control unit 1012, obtain a second optical signal sent by the second secondary device to the first secondary device, convert the second optical signal into a second digital signal, and send the second digital signal to the central control unit 1012.
The first optical signal is an optical signal transmitted between the two secondary devices through the optical fiber from the first secondary device to the second secondary device, and the second optical signal is an optical signal transmitted between the two secondary devices through the optical fiber from the second secondary device to the first secondary device.
As shown in fig. 3: the optical signal sampling unit 1011 includes a photoelectric converter 10111, a potentiometer 10112, an amplifier 10113, and an analog-to-digital converter 10114.
The photoelectric converter 10111 is configured to convert the first optical signal into a first analog electrical signal, send the first analog electrical signal to the amplifier 10113, convert the second optical signal into a second analog electrical signal, and send the second analog electrical signal to the potentiometer 10112.
The potentiometer 10112 is configured to adjust a voltage of the first analog electrical signal to obtain a first analog electrical signal with the voltage adjusted, send the first analog electrical signal with the voltage adjusted to the amplifier 10113, adjust a voltage of the second analog electrical signal to obtain a second analog electrical signal with the voltage adjusted, and send the second analog electrical signal with the voltage adjusted to the amplifier 10113; because the potentiometer 10112 is matched with the amplifier 10113, the number of bits of the amplifier is adjusted by adjusting the resistance value of the potentiometer 10112, that is, each resistance value of the potentiometer corresponds to one amplification factor, the potentiometer 10112 needs to have the characteristic of high precision, and also has the functional characteristics of low power consumption, large resistance range and large adaptable temperature range.
The amplifier 10113 is configured to amplify the power of the first analog electrical signal after the voltage is adjusted, obtain a first analog electrical signal after the power is amplified, send the first analog electrical signal after the power is amplified to the analog-to-digital converter 10114, amplify the power of the second analog electrical signal after the voltage is adjusted, obtain a second analog electrical signal after the power is amplified, and send the second analog electrical signal after the power is amplified to the analog-to-digital converter 10114; since the amplifier 10113 amplifies the first analog electrical signal, the potentiometer 10112 cooperates with the amplifier 10113, and the multiple of the amplifier 10113 is in one-to-one correspondence with the resistance of the potentiometer 10112, the amplifier 10113 needs to have the functional characteristics of good temperature stability, sufficient bandwidth and no distortion.
The analog-to-digital converter 10114 is configured to quickly and accurately convert the amplified first analog electrical signal into a first digital signal, accurately send the first digital signal to the central control unit 1012, quickly and accurately convert the amplified second analog electrical signal into a second digital signal, and accurately send the second digital signal to the central control unit, so that the analog-to-digital converter 10114 needs to have functional characteristics of high resolution, high conversion speed, and low error.
Preferably, the central control unit 1012 is specifically configured to compare the signal characteristic information of the first digital signal with the signal characteristic information of the second digital signal, obtain characteristic difference information between the first digital signal and the second digital signal, and generate the optical signal attenuation state information between the first secondary device and the second secondary device according to the characteristic difference information between the first digital signal and the second digital signal.
The central control unit 1012 is configured to obtain the optical signal attenuation state information between the first secondary device and the second secondary device according to the first digital signal and the second digital signal, and perform fast processing on the optical signal attenuation state information and send the optical signal attenuation state information to the network unit 1013, so the central control unit 1012 needs to have functional characteristics of low power consumption, fast processing speed, and high cost performance.
The network unit 1013 is configured to upload the data of the central control unit 1012 to the background monitoring subsystem 103 quickly and stably, and the central control unit 1012 needs to have a function characteristic that data transmission is simpler, quicker, more stable and safer.
And the background monitoring subsystem 103 is configured to determine whether the optical fiber signal transmission between the first secondary device and the second secondary device fails according to the optical signal attenuation state information.
Preferably, the background monitoring subsystem 103 is specifically configured to determine whether the optical signal attenuation state indicated by the optical signal attenuation state information satisfies a preset fault alarm condition, and if so, determine that the optical fiber signal transmission between the first secondary device and the second secondary device has a fault.
The preset fault alarm condition is set according to the optical power loss value of the optical signal of the optical fiber link, one threshold value is set according to the actual condition, when the loss value is larger than the threshold value, the optical fiber link is judged to be in fault or to be in fault, a plurality of threshold values can be set according to the actual condition, each threshold value corresponds to the specific condition of the optical fiber link, the state of the optical fiber link can be known according to different threshold values, and therefore the optical fiber link of the transformer substation can be maintained actively.
Preferably, the background monitoring subsystem 103 is further configured to output a prompt message indicating that the optical fiber signal transmission between the first secondary device and the second secondary device is failed if it is determined that the optical fiber signal transmission between the first secondary device and the second secondary device is failed.
Preferably, the background monitoring subsystem 103 is further configured to obtain running state information, which is reported by a plurality of secondary devices in the substation and used for representing primary devices in the substation, and determine whether the first secondary device reports running state information of the first primary device monitored by the first secondary device on time and whether the second secondary device reports running state information of the second primary device monitored by the second secondary device on time;
the background monitoring subsystem 103 is further configured to, if it is determined that the optical fiber signal transmission between the first secondary device and the second secondary device is faulty, determine a fault point at which the optical fiber signal transmission between the first secondary device and the second secondary device is faulty, according to a determination result of whether the first secondary device timely reports the operating state information of the first primary device monitored by the first secondary device, and a determination result of whether the second secondary device timely reports the operating state information of the second primary device monitored by the second secondary device.
The background monitoring subsystem 103 is further configured to determine a failure point at which optical fiber signal transmission between the first secondary device and the second secondary device fails, and because the background monitoring subsystem 103 can monitor whether the optical fiber link fails and also can monitor whether the first secondary device can report the operating state information of the first primary device on time and monitor whether the second secondary device can report the operating state information of the second primary device on time, the background monitoring subsystem 103 can also monitor whether the first secondary device fails and monitor whether the second secondary device fails.
Referring to the embodiment, if the background monitoring subsystem 103 detects that the optical fiber link between the first secondary device and the second secondary device is not faulty through the optical splitter, and meanwhile, the background monitoring subsystem 103 monitors that the first secondary device and the second secondary device both operate normally, but the background monitoring subsystem 103 monitors that the first secondary device does not report the operating state information of the first primary device on time, the optical fiber interface of the first secondary device is faulty, and if the background monitoring subsystem 103 monitors that the second secondary device does not report the operating state information of the second primary device on time, the optical fiber interface of the second secondary device is faulty. Similarly, if the background monitoring subsystem 103 detects that the optical fiber link between the first secondary device and the second secondary device is failed through the optical splitter, and the background monitoring subsystem 103 detects that the first secondary device does not report the operating state information of the first primary device on time, the optical fiber interface of the first secondary device and the optical fiber link are failed at the same time, and if the background monitoring subsystem 103 detects that the optical fiber link between the first secondary device and the second secondary device is failed through the optical splitter, and the background monitoring subsystem 103 detects that the second secondary device does not report the operating state information of the second primary device on time, the optical fiber interface of the second secondary device and the optical fiber link are failed at the same time.
Preferably, the plurality of secondary devices in the substation include at least one device selected from a switch, a telemechanical, a merging unit, a protection device, and a time-giving device.
The above-described embodiment is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the scope of the invention as set forth in the claims.

Claims (10)

1. A fiber optic monitoring system for a substation, comprising: the system comprises an optical fiber monitoring management machine, a background monitoring subsystem and a plurality of secondary devices in a transformer substation, wherein the optical fiber monitoring management machine is respectively connected with each secondary device in the plurality of secondary devices through an optical fiber, and a connection relation is formed between the optical fiber monitoring management machine and the background monitoring subsystem;
the optical fiber monitoring and managing machine is used for monitoring the optical signal attenuation state between every two secondary devices in the plurality of secondary devices, and comprises an optical signal sampling unit, a central control unit and a network unit;
the optical signal sampling unit is configured to obtain a first optical signal that is sent by a first secondary device of the multiple secondary devices to a second secondary device of the multiple secondary devices, convert the first optical signal into a first digital signal, send the first digital signal to the central control unit, obtain a second optical signal that is sent by the second secondary device to the first secondary device, convert the second optical signal into a second digital signal, and send the second digital signal to the central control unit;
the central control unit is configured to obtain optical signal attenuation state information between the first secondary device and the second secondary device according to the first digital signal and the second digital signal, and send the optical signal attenuation state information to the network unit;
the network unit is used for sending the optical signal attenuation state information to the background monitoring subsystem;
and the background monitoring subsystem is used for judging whether the optical fiber signal transmission between the first secondary equipment and the second secondary equipment fails or not according to the optical signal attenuation state information.
2. The system of claim 1, wherein the optical signal sampling unit comprises an optical-to-electrical converter, a potentiometer, an amplifier, and an analog-to-digital converter;
the photoelectric converter is used for converting the first optical signal into a first analog electrical signal, sending the first analog electrical signal to the potentiometer, converting the second optical signal into a second analog electrical signal, and sending the second analog electrical signal to the potentiometer;
the potentiometer is used for adjusting the voltage of the first analog electrical signal to obtain a first analog electrical signal after the voltage is adjusted, sending the first analog electrical signal after the voltage is adjusted to the amplifier, adjusting the voltage of the second analog electrical signal to obtain a second analog electrical signal after the voltage is adjusted, and sending the second analog electrical signal after the voltage is adjusted to the amplifier;
the amplifier is used for amplifying the power of the first analog electrical signal after the voltage is adjusted to obtain the first analog electrical signal after the power is amplified, sending the first analog electrical signal after the power is amplified to the analog-to-digital converter, amplifying the power of the second analog electrical signal after the voltage is adjusted to obtain the second analog electrical signal after the power is amplified, and sending the second analog electrical signal after the power is amplified to the analog-to-digital converter.
3. The system according to claim 2, wherein the optical signal sampling unit further includes an optical splitter, the optical splitter is configured to split a first optical signal sent by the first secondary device to the second secondary device into two first optical signals, send one of the two first optical signals to the optical-to-electrical converter, send the other of the two first optical signals to a port provided in the optical fiber monitoring manager and configured to receive the second optical signal and send the first optical signal to the second secondary device, split a second optical signal sent by the second secondary device to the first secondary device into two second optical signals, send one of the two second optical signals to the optical-to-electrical converter, and send one of the second optical signals to a port provided in the optical fiber monitoring manager and configured to receive the second optical signal The first optical signal and the port that sends the second optical signal to the first secondary device.
4. The system of claim 1, wherein the central control unit is specifically configured to compare signal characteristic information of the first digital signal with signal characteristic information of the second digital signal, obtain characteristic difference information between the first digital signal and the second digital signal, and generate optical signal attenuation state information between the first secondary device and the second secondary device according to the characteristic difference information between the first digital signal and the second digital signal.
5. The system of claim 1, wherein the background monitoring subsystem is specifically configured to determine whether an optical signal attenuation state indicated by the optical signal attenuation state information satisfies a preset fault alarm condition, and if so, determine that optical fiber signal transmission between the first secondary device and the second secondary device has a fault.
6. The system of claim 1 or 5, wherein the background monitoring subsystem is further configured to output a prompt indicating that the fiber-optic signal transmission between the first secondary device and the second secondary device is failed if it is determined that the fiber-optic signal transmission between the first secondary device and the second secondary device is failed.
7. The system according to claim 1 or 5, wherein the background monitoring subsystem is further configured to send, to the first secondary device and the second secondary device, indication information for indicating to start a backup optical fiber link between the first secondary device and the second secondary device for optical signal transmission, if it is determined that optical fiber signal transmission between the first secondary device and the second secondary device is failed.
8. The system according to claim 1 or 5, wherein the background monitoring subsystem is further configured to obtain running state information, which is reported by the plurality of secondary devices in the substation and used for representing primary devices in the substation, and determine whether the first secondary device reports the running state information of the first primary device monitored by the first secondary device on time and whether the second secondary device reports the running state information of the second primary device monitored by the second secondary device on time;
the background monitoring subsystem is further configured to determine a fault point at which optical fiber signal transmission between the first secondary device and the second secondary device fails according to a determination result of whether the first secondary device timely reports operating state information of the first primary device monitored by the first secondary device and a determination result of whether the second secondary device timely reports operating state information of the second primary device monitored by the second secondary device, if it is determined that optical fiber signal transmission between the first secondary device and the second secondary device fails.
9. The system according to claim 8, wherein if the first secondary device does not report the running state information of the first primary device monitored by the first secondary device on time, it is determined that the first secondary device is the fault point;
or if the second secondary device does not report the running state information of the second primary device monitored by the second secondary device on time, determining that the second secondary device is the fault point.
10. The system of claim 1, wherein the plurality of secondary devices in the substation comprises at least one of a switch, a telemechanical, a merge unit, a protection device, and a timing device.
CN202011367680.2A 2020-11-27 2020-11-27 Optical fiber monitoring system for transformer substation Pending CN112653234A (en)

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Publication number Priority date Publication date Assignee Title
CN103312556A (en) * 2013-05-09 2013-09-18 国家电网公司 Device and method for monitoring and testing real-time performance of optical Ethernet
US20160006636A1 (en) * 2013-02-17 2016-01-07 Zte Corporation Method and node for detecting subframe sequence error in inverse multiplexing

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160006636A1 (en) * 2013-02-17 2016-01-07 Zte Corporation Method and node for detecting subframe sequence error in inverse multiplexing
CN103312556A (en) * 2013-05-09 2013-09-18 国家电网公司 Device and method for monitoring and testing real-time performance of optical Ethernet

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