CN113949157A - Feeder terminal system and signal supplementing device - Google Patents
Feeder terminal system and signal supplementing device Download PDFInfo
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- CN113949157A CN113949157A CN202111186188.XA CN202111186188A CN113949157A CN 113949157 A CN113949157 A CN 113949157A CN 202111186188 A CN202111186188 A CN 202111186188A CN 113949157 A CN113949157 A CN 113949157A
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- 230000001502 supplementing effect Effects 0.000 title claims abstract description 92
- 238000004891 communication Methods 0.000 claims abstract description 84
- 238000005516 engineering process Methods 0.000 claims description 14
- 230000003993 interaction Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 13
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- QVFWZNCVPCJQOP-UHFFFAOYSA-N chloralodol Chemical compound CC(O)(C)CC(C)OC(O)C(Cl)(Cl)Cl QVFWZNCVPCJQOP-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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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
- H02J13/00022—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 wireless data transmission
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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
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/03—Protecting confidentiality, e.g. by encryption
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/04—Arrangements for maintaining operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
- H04W36/305—Handover due to radio link failure
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- 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
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- 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
- 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
- Y04S40/126—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 wireless data transmission
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Computer Security & Cryptography (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a feeder terminal system and a signal supplementing device. The feeder terminal system comprises at least two feeder terminal devices and a signal supplementing device arranged corresponding to the feeder terminal devices; the feeder terminal device is connected with a feeder of the power distribution network and is wirelessly connected with the power distribution substation; the signal supplementing devices are connected with the feeder line terminal device, and a communication network is constructed between at least two signal supplementing devices; when the connection between the feeder terminal device and the distribution substation is in a fault state, the feeder terminal device transmits the operation data to other feeder terminal devices through the signal supplementing device. The data intercommunication with the distribution substation or the server is realized by utilizing the remote feeder terminal device through the signal supplementing device, the problem that the feeder terminal device is disconnected with the distribution substation or the server due to the conditions of insufficient signal coverage, weak signal, signal interruption and the like is solved, and the reliability of the connection between the feeder terminal device and the distribution substation or the server is effectively ensured.
Description
Technical Field
The embodiment of the invention relates to a feeder terminal application technology, in particular to a feeder terminal system and a signal supplementing device.
Background
The distribution network is composed of overhead lines, cables, towers, distribution transformers, isolating switches, reactive power compensators, a plurality of accessory facilities and the like, and is used for receiving electric energy from a transmission network or a regional power plant and distributing the electric energy to the power networks of various users.
The power distribution network comprises a large number of lines and power equipment, the operation conditions of the lines and the power equipment need to be monitored and controlled in the actual operation process, usually, a feeder line terminal device is installed on a feeder line of the lines and the power equipment, and the acquisition of the operation data of the lines and the power equipment and the remote control of the lines and the power equipment are realized through the communication between the feeder line terminal device and a power distribution substation. The communication between the feeder terminal device and the distribution substation is usually realized by a GPRS (General Packet Radio Service) technology or a satellite communication technology. In the process of communication between the feeder terminal device and the distribution substation, normal uploading and receiving of operation data can be ensured only by ensuring that the GPRS signal or the satellite signal has certain strength.
The problems of weak signal strength, unstable signals and the like of remote areas often occur in the outdoor environment, and the communication between the feeder line terminal device and the power distribution substation is interrupted, so that the monitoring and control of lines and power equipment are lost, and the running stability of a power distribution network is reduced. In view of the above circumstances, most of the existing methods are to add a signal tower to enhance the signal strength in remote areas, or to use a wired transmission method to realize the communication between the feeder terminal device and the distribution substation, and the realization of these methods all has the problem that a large amount of resources and cost are consumed to reform the original installation environment of the feeder terminal device.
Disclosure of Invention
The invention provides a feeder terminal system and a signal supplementing device, which are used for ensuring communication between a feeder terminal device and a distribution substation in an outdoor environment and the like.
In a first aspect, an embodiment of the present invention provides a feeder terminal system, including at least two feeder terminal devices and a signal supplementing device configured to correspond to the feeder terminal devices;
the feeder terminal device is connected with a feeder of the power distribution network and used for acquiring operation data of the power distribution network and controlling the operation of the power distribution network, and the feeder terminal device is wirelessly connected with the power distribution substation;
the signal supplementing devices are connected with the feeder line terminal device, and a communication network is constructed between at least two signal supplementing devices;
when the connection between the feeder terminal device and the distribution substation is in a fault state, the feeder terminal device sends the operation data to other feeder terminal devices through the signal supplementing device and communicates with the distribution substation through other feeder terminal devices.
Optionally, when the connection between the feeder terminal device and the distribution substation is in a fault-free state, the operation data is uploaded based on the wireless connection between the feeder terminal device and the distribution substation.
Optionally, the fault state includes a case where a wireless connection between the feeder terminal device and the distribution substation is interrupted or a signal strength is lower than a preset signal threshold.
Optionally, when the signal intensity is lower than the signal threshold, detecting a connectivity of a wireless connection between the feeder terminal device and the distribution substation;
and when the communication rate is greater than a preset communication threshold value, uploading the operation data based on the wireless connection between the feeder terminal device and the distribution substation.
Optionally, when the signal supplementing device receives the operation data sent by another signal supplementing device, the network state of the feeder terminal device corresponding to the signal supplementing device is obtained;
and uploading the operation data when the connection between the feeder terminal device corresponding to the signal supplementing device and the distribution substation is in a fault-free state.
Optionally, when the connection between the feeder terminal device corresponding to the signal supplementing device and the distribution substation is in a fault state, the operation data is sent to the other feeder terminal devices again.
Optionally, before the feeder terminal device sends the operation data to another feeder terminal device through the signal supplementing device, the feeder terminal device further includes an encryption processing unit for encrypting the operation data.
Optionally, the feeder terminal device is wirelessly connected with the distribution substation through GPRS or satellite communication.
Optionally, a communication network is constructed between the signal supplementing devices based on the LoRaMesh technology.
In a second aspect, an embodiment of the present invention further provides a signal supplementing device for the feeder terminal system in the first aspect, where the signal supplementing device is used for performing data interaction with a distribution substation by using other feeder terminal devices when a connection fault occurs between the feeder terminal device and the distribution substation;
the signal supplementing device comprises a body, wherein a power supply module, a communication module and an encryption module are arranged in the body, and the communication module and the encryption module are respectively connected with the power supply module;
the encryption module is connected with the communication module and used for encrypting the operation data read from the feeder terminal device and decrypting the data returned by the distribution substation;
the communication module is connected with the feeder terminal device, and the communication module is wirelessly connected with the communication modules of other feeder terminal devices.
According to the invention, the signal supplementing device is arranged between the feeder terminal devices, when the connection between the feeder terminal device and the distribution substation is in a fault state, the data intercommunication between the feeder terminal device and the distribution substation or the server is realized by utilizing the remote feeder terminal device through the signal supplementing device, the problem of the loss of connection between the feeder terminal device and the distribution substation or the server caused by the conditions of insufficient signal coverage, weak signal, signal interruption and the like is solved, the reliability of the connection between the feeder terminal device and the distribution substation or the server is effectively ensured, and the cost increase caused by the arrangement of the signal enhancing device and the like is avoided.
Drawings
Fig. 1 is a schematic structural diagram of a feeder terminal system provided in the present invention;
fig. 2 is a schematic structural diagram of a signal supplementing apparatus provided in the present invention.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Fig. 1 is a schematic structural diagram of a feeder terminal system provided by the present invention, and fig. 2 is a schematic structural diagram of a signal supplementing apparatus provided by the present invention. The embodiment can be applied to the conditions that communication signals between the feeder terminal device and the distribution substation are interrupted, weak signals and the like in the open air and the like, and the communication between the feeder terminal device and the distribution substation cannot be met.
In this embodiment, the present invention provides a signal supplementing apparatus applied to a feeder terminal system, where a plurality of signal supplementing apparatuses may be configured to form a communication network to implement data transmission. The signal supplementing device is arranged near the feeder terminal device corresponding to the feeder terminal device, and can perform data transmission with the feeder terminal device in a wired or wireless mode. When the communication between the feeder terminal device and the remote power distribution substation is in a fault state, the signal supplementing device is responsible for communication data transmission between the feeder terminal device with the communication fault and the power distribution substation.
Specifically, when communication between the feeder terminal device (first feeder terminal device) and the remote distribution substation is in a failure state, the feeder terminal device (first feeder terminal device) switches to a data interaction mode by the signal supplementing device, the feeder terminal device transmits the operation data to the signal supplementing device (first signal supplementing device), then the signal supplementing device (first signal supplementing device) sends the operation data to other signal supplementing devices (second signal supplementing devices) based on a communication network among the plurality of signal supplementing devices, the second signal supplementing device sends the received operation data to a corresponding feeder terminal device (second feeder terminal device), and the second feeder terminal device uploads the operation data to the distribution substation, so that communication between the first feeder terminal device and the distribution substation is realized.
The fault state may refer to abnormal communication conditions such as communication interruption, low signal strength, high packet loss rate, low connectivity rate, and the like between the first feeder terminal device and the remote power distribution substation, and it is not limited herein, and it is not limited that the signal supplementing device and the feeder terminal system provided in the embodiment of the present invention may be used only when the communication between the first feeder terminal device and the remote power distribution substation is in the fault state, and the communication between the first feeder terminal device and the power distribution substation may be actively switched to the mode of implementing the communication between the first feeder terminal device and the power distribution substation through the signal supplementing device in the embodiment of the present invention even when the communication is normal.
As shown in fig. 2, in the embodiment of the present invention, the signal supplementing device includes a body 21, a power supply module 22, a communication module 23, and an encryption module 24 are disposed in the body, the communication module and the encryption module are respectively connected to the power supply module, and the communication module is respectively connected to the feeder line terminal device and a signal supplementing device disposed elsewhere.
The encryption module is connected with the communication module and used for encrypting the operation data read from the feeder terminal device and decrypting the data returned by the power distribution substation. For example, the communication module and the feeder line terminal device may be connected in a wired or wireless manner, for example, using a communication line, a zigbee, a Bluetooth (Bluetooth), a wireless broadband (Wi-Fi), an Ultra Wideband (UWB), a Near Field Communication (NFC), and the like, without any particular limitation, as long as the communication between the communication module and the feeder line terminal device can be achieved. And for the signal supplement devices arranged at the communication module and other places, a long-distance wireless transmission technology is required to be used, the communication distance can be ensured to span the distance between two adjacent feeder line terminal devices, and the signal supplement devices arranged at the positions of the two adjacent feeder line terminal devices can be ensured to be interconnected. For example, the method uses the lora (long Range radio) wireless technology, spread spectrum microwave communication, wireless bridge, short wave communication, etc.
In specific implementation, the power supply module can be a battery arranged in the body, a power taking device connected with a power distribution network, a solar panel and the like, or a combination of several modes. The encryption module is an electronic circuit module used for providing wireless encryption communication, and can encrypt the operation data read from the feeder terminal device and decrypt the data returned by the power distribution substation so as to ensure the safety in the data transmission process.
In an embodiment of the present invention, a feeder terminal system is further provided, which includes at least two feeder terminal devices and a signal supplementing device configured to correspond to the feeder terminal devices. The feeder terminal device is connected with a feeder of the power distribution network and used for acquiring operation data of the power distribution network and controlling operation of the power distribution network, and the feeder terminal device is wirelessly connected with the power distribution substation; the signal supplementing devices are connected with the feeder line terminal device, and a communication network is constructed between at least two signal supplementing devices; when the connection between the feeder terminal device and the distribution substation is in a fault state, the feeder terminal device sends the operation data to other feeder terminal devices through the signal supplementing device and communicates with the distribution substation through other feeder terminal devices.
In the embodiment of the invention, a Feeder Terminal device is a power distribution switch monitoring Terminal (FTU), adopts an advanced DSP (digital signal processing) technology, a multi-CPU (Central processing Unit) integration technology and a high-speed industrial network communication technology, adopts an embedded real-time multi-task operating system, has strong stability, high reliability, good real-time performance, wide adaptive environment and strong functions, has the functions of remote control, remote measurement, remote communication and fault detection, communicates with a power distribution automation master station, provides the running condition of the power distribution system, various parameters and information required by monitoring and controlling, including on-off state, electric energy parameters, phase-to-phase faults, grounding faults and parameters during faults, executes commands issued by the power distribution master station, adjusts and controls power distribution equipment, and realizes the functions of fault location, fault isolation, quick power restoration of non-fault areas and the like.
In specific application, the feeder terminal device is arranged corresponding to a line of a power distribution network and a feeder of power equipment, and the arrangement environment comprises indoor and outdoor environments and the like. The feeder line terminal device is directly connected with the power distribution substation or the server through a microwave communication technology (GPRS, satellite communication and other technologies), remote control, remote measurement, remote signaling and fault detection of the line and the power equipment are mainly realized through communication between the power distribution substation or the server and the feeder line terminal device, the stability of the communication is relatively high, otherwise, normal communication cannot occur, the timely control of the operation condition of the line and the power equipment cannot be realized, and the normal and safe operation of a power distribution network is influenced. And under outdoor environment, the condition that partial area communication signal covers incompletely, signal loss or signal intensity weak appears easily for feeder terminal device can't normally communicate with distribution substation or server is normal, and the current mode to this condition is mostly through increasing the connected signal intensity between signal emission device reinforcing feeder terminal device and distribution substation or the server, improves communication quality, realizes the communication demand of feeder terminal device and distribution substation or server again through the wire line.
In the embodiment of the present invention, the scheme of the present invention is exemplarily described by taking two feeder terminal devices and two signal supplementing devices as examples. And setting the two feeder terminal devices as a first feeder terminal device and a second feeder terminal device, respectively, and setting the two signal supplementing devices as a first signal supplementing device and a second signal supplementing device.
The first signal supplementing device is arranged beside the first feeder terminal device, is connected with the first feeder terminal device in a wired or wireless mode, and can acquire operation data of the first feeder terminal device and send a control command to the first feeder terminal device; the second signal supplementing device is arranged beside the second feeder terminal device, and is connected with the second feeder terminal device in a wired or wireless mode, and the second signal supplementing device can acquire the operation data of the second feeder terminal device and send a control command to the second feeder terminal device. And the first signal supplementing device and the second signal supplementing device establish a communication network through a long-distance wireless transmission technology, so that data intercommunication can be realized between the first signal supplementing device and the second signal supplementing device.
In a particular implementation, when the connection between the feeder terminal device and the distribution substation is in a fault state, switching to data intercommunication with the distribution substation or the server through the signal supplementing device, transmitting the operation data of the first feeder terminal device to the second signal supplementing device through the first signal supplementing device, and then the data is transmitted to a second feeder terminal device, the interconnection between the first feeder terminal device and a distribution substation or a server is realized through a connecting channel between the second feeder terminal device and the distribution substation or the server, the problem of loss of connection between the feeder terminal device and the distribution substation or the server due to insufficient signal coverage, weak signal, signal interruption and the like is solved, the reliability of connection between the feeder terminal device and the distribution substation or the server is effectively ensured, and the cost increase caused by arrangement of a signal reinforcing device and the like is avoided.
In addition, the feeder terminal system provided by the embodiment of the invention can be applied to the condition of temporary communication interruption, and a new uploading channel can be built only by respectively installing one signal supplementing device between two adjacent feeder terminal devices, so that the problem of communication interruption is solved.
In the embodiment of the invention, when the connection between the feeder terminal device and the distribution substation is in a fault-free state, the operation data is transmitted based on the wireless connection between the feeder terminal device and the distribution substation.
The fault state comprises the condition that the wireless connection between the feeder terminal device and the distribution substation is interrupted or the signal intensity is lower than a preset signal threshold value. That is, when the communication between the feeder terminal device and the distribution substation or the server is interrupted, or the signal intensity at the feeder terminal device is weak, or the communication condition with the distribution substation or the server cannot be satisfied, it is determined as a fault state. In addition, the communication mode between the active switching feeder terminal device and the distribution substation or the server can be switched from the original mode to the mode provided by the embodiment of the invention.
In a specific implementation, the communication quality between the feeder terminal device and the distribution substation or the server can be judged as a basis for judging the fault state. For example: when the signal intensity is lower than the signal threshold value, detecting the connectivity of the wireless connection between the feeder terminal device and the distribution substation; and when the connectivity is greater than a preset connectivity threshold value, transmitting the operation data based on the wireless connection of the feeder terminal device and the power distribution substation.
In the embodiment of the present invention, the connection rate refers to a ratio of the number of times of connection in the test to the number of times of transmission. In addition, the packet loss rate between the feeder terminal device and the distribution substation or the server can be measured. The Loss Rate (Loss Tolerance or Packet Loss Rate) is the ratio of the number of lost packets in the transmitted data group during the test. The calculation method is that [ (input message-output message)/input message ]. 100% ". The packet loss rate is related to the packet length and the packet transmission frequency. In addition, other modes and means capable of testing and judging the communication quality between the feeder terminal device and the distribution substation or the server can be adopted.
In an embodiment of the invention, the signal supplementing means comprises first signal supplementing means arranged to communicate at a fault state and second signal supplementing means arranged at a normal communication state. When the second signal supplementing device receives the operation data sent by other signal supplementing devices, the network state of the feeder line terminal device corresponding to the signal supplementing device is obtained; and when the connection between the feeder line terminal device corresponding to the signal supplementing device and the distribution substation is in a fault-free state, uploading the operation data. That is, when a request and data for transmission from a remote signal supplementing device are received by the signal supplementing device, the communication state between the local feeder terminal device and the remote distribution substation or server is verified, and when the communication state between the feeder terminal device and the remote distribution substation or server is normal, the communication between the remote feeder terminal device (first feeder terminal device) and the distribution substation or server is performed through the local feeder terminal device (second feeder terminal device). And when the connection between the feeder terminal device corresponding to the second feeder terminal device and the signal supplementing device and the distribution substation is in a fault state, transmitting the operation data to other feeder terminal devices again.
In a specific implementation, before the feeder terminal device sends the operation data to other feeder terminal devices through the signal supplementing device, encryption processing on the operation data can be further included. That is, the transmitted data is encrypted in the process of information transmission by the signal supplementing device, so that the safety of data transmission is effectively ensured. The encryption of the data can be realized by the encryption module 24 provided in the signal supplementing device. The data may be encrypted by other means, and the present invention is not limited to this, as long as the data can be encrypted and decrypted.
In one embodiment, the feeder terminal device is wirelessly connected to the distribution substation via GPRS or satellite communication. And a communication network is constructed between the signal supplementing devices based on the LoRamesh technology.
In the description herein, it is to be understood that the terms "upper," "lower," "left," "right," and the like are based on the orientation or positional relationship shown in the drawings for convenience in description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.
In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A feeder terminal system is characterized by comprising at least two feeder terminal devices and a signal supplementing device arranged corresponding to the feeder terminal devices;
the feeder terminal device is connected with a feeder of the power distribution network and used for acquiring operation data of the power distribution network and controlling the operation of the power distribution network, and the feeder terminal device is wirelessly connected with the power distribution substation;
the signal supplementing devices are connected with the feeder line terminal device, and a communication network is constructed between at least two signal supplementing devices;
when the connection between the feeder terminal device and the distribution substation is in a fault state, the feeder terminal device sends the operation data to other feeder terminal devices through the signal supplementing device and communicates with the distribution substation through other feeder terminal devices.
2. The feeder terminal system of claim 1, wherein the operational data is uploaded based on a wireless connection of the feeder terminal device with the distribution substation while a connection between the feeder terminal device and the distribution substation is in a non-fault state.
3. The feeder termination system of claim 1, wherein the fault condition comprises a condition in which a wireless connection of the feeder termination device with a distribution substation is interrupted or a signal strength is below a preset signal threshold.
4. The feeder termination system of claim 3, wherein the connectivity of the wireless connection between the feeder termination device and the distribution substation is detected when the signal strength is below the signal threshold;
and when the communication rate is greater than a preset communication threshold value, uploading the operation data based on the wireless connection between the feeder terminal device and the distribution substation.
5. The feeder terminal system of claim 1, wherein when the signal supplementing device receives the operation data sent by other signal supplementing devices, a network status of the feeder terminal device corresponding to the signal supplementing device is obtained;
and uploading the operation data when the connection between the feeder terminal device corresponding to the signal supplementing device and the distribution substation is in a fault-free state.
6. The feeder termination system of claim 5, wherein when the connection between the feeder termination device corresponding to the signal supplementing device and the distribution substation is in a fault state, the operational data is again transmitted to the other feeder termination devices.
7. The feeder terminal system of claim 1, further comprising encrypting the operational data before the feeder terminal device transmits the operational data to other feeder terminal devices via the signal supplementing device.
8. The feeder termination system of any one of claims 1 to 7, wherein the feeder termination device is wirelessly connected to the distribution substation via GPRS or satellite communications.
9. Feeder terminal system according to any of claims 1-7, characterized in that the signal supplementing devices form a communication network based on LoRaMesh technology.
10. A signal supplementing device for a feeder terminal system as claimed in any one of claims 1 to 9, wherein the signal supplementing device is used for performing data interaction with a distribution substation by other feeder terminal devices when the connection between the feeder terminal device and the distribution substation fails;
the signal supplementing device comprises a body, wherein a power supply module, a communication module and an encryption module are arranged in the body, and the communication module and the encryption module are respectively connected with the power supply module;
the encryption module is connected with the communication module and used for encrypting the operation data read from the feeder terminal device and decrypting the data returned by the distribution substation;
the communication module is connected with the feeder terminal device, and the communication module is wirelessly connected with the communication modules of other feeder terminal devices.
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