CN111615018B - Communication system and method based on ultra/extra-high voltage power transmission and transformation project - Google Patents
Communication system and method based on ultra/extra-high voltage power transmission and transformation project Download PDFInfo
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- CN111615018B CN111615018B CN202010396288.4A CN202010396288A CN111615018B CN 111615018 B CN111615018 B CN 111615018B CN 202010396288 A CN202010396288 A CN 202010396288A CN 111615018 B CN111615018 B CN 111615018B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
- H04L67/025—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP] for remote control or remote monitoring of applications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/40—Arrangements in telecontrol or telemetry systems using a wireless architecture
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/80—Arrangements in the sub-station, i.e. sensing device
- H04Q2209/88—Providing power supply at the sub-station
- H04Q2209/883—Providing power supply at the sub-station where the sensing device enters an active or inactive mode
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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
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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
- 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
Abstract
The invention discloses a communication system and a method based on ultra/extra-high voltage power transmission and transformation engineering, wherein the system comprises: center main website, with a plurality of collection node and terminal that center main website is connected, wherein: the system comprises an acquisition node, a power controller, a LoRa module and a response module, wherein the acquisition node is used for acquiring data generated during debugging of an ultra/extra-high voltage power transmission and transformation project, the power controller is used for receiving connection actively initiated by a terminal and sending a data command related to a main power supply of the power controller, and the power controller comprises the LoRa module and receives LoRa broadcast by adopting a LoRa application layer protocol and responds after analysis; according to the invention, loRa communication is adopted, and a corresponding application layer protocol is set, so that the acquisition node can close the main power supply to enter a standby state when signals do not need to be acquired, thereby greatly prolonging the working and standby time of the acquisition node, better meeting the requirements of starting and debugging tests of ultra/extra-high voltage power transmission and transformation engineering, and improving the safety and reliability of the tests.
Description
Technical Field
The invention relates to the technical field of wireless communication systems, in particular to a wireless communication system and a wireless communication method based on an ultra/extra-high voltage power transmission and transformation project wireless measurement system.
Background
In order to ensure the safe operation of the power equipment in the newly-built transformer substation or the newly-built line project, a starting debugging test is required before the newly-built substation or the newly-built line project is operated, so that the correctness of a new system is ensured.
In the traditional mode, a transient state wave recording in the debugging process mainly adopts a double-shielded signal wire to remotely guide a measured signal to a wave recorder in a relay protection room from an outdoor measuring point, and the defects of long test deployment period, low efficiency, large workload, low safety and the like exist; the wireless communication mode can carry out the collection and the digitization of signal near signal measurement point to through wireless communication mode with the measuring result passback to indoor host computer, reduction debugging test's that can be very big wiring work load, staff's working strength also can improve experimental security and reliability.
On the other hand, the acquisition node of the wireless measurement system for debugging the ultra/extra-high voltage power transmission and transformation project directly acquires signals at a far end and completes analog-to-digital conversion, 220V mains supply is not available near a far-end signal measurement point or the distance from a maintenance power box is far, so that power is supplied by a built-in battery, the battery capacity of the acquisition node is limited, long-time test is difficult to complete, the service time of equipment is short, and the debugging requirement cannot be met.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects of the prior art, the invention provides a communication system based on an ultra/extra-high voltage power transmission and transformation project, which can solve the problems of short available time of acquisition nodes, low debugging efficiency or even incapability of completing debugging in the debugging process of the ultra/extra-high voltage power transmission and transformation project, and on the other hand, the invention also provides a communication method based on the ultra/extra-high voltage power transmission and transformation project.
The technical scheme is as follows: according to a first aspect of the present invention, there is provided a communication system based on ultra/extra-high voltage power transmission and transformation engineering, the system comprising: central main website, terminal and with a plurality of collection nodes that central main website is connected, wherein:
the system comprises an acquisition node, a power controller, a LoRa module and a response module, wherein the acquisition node is used for acquiring data generated during debugging of ultra/extra-high voltage power transmission and transformation projects, the power controller is used for receiving connection actively initiated by a terminal and sending related data commands of a main power supply, and the LoRa module is integrated in the power controller and used for receiving LoRa broadcast by adopting a LoRa application layer protocol and responding after analysis; the LoRa is Long Range Radio (Long Range Radio), which is a low power consumption local area network wireless standard created by semtech corporation, low power consumption is generally difficult to cover Long distance, and the LoRa is characterized in that the distance of propagation is longer than that of other wireless modes under the same power consumption condition, so that the unification of low power consumption and Long distance is realized, and the distance of the LoRa is enlarged by 3-5 times than that of the traditional wireless Radio frequency communication under the same power consumption. The LoRa module is one of LPWAN communication technologies, and is an ultra-long-distance wireless transmission scheme based on a spread spectrum technology adopted and popularized by Semtech corporation in the united states.
The central master station is internally integrated with an LoRa gateway which is used for realizing the transceiving operation between the acquisition node and the terminal in a connecting way;
and the terminal sends a related data command of a main power supply to the LoRa gateway, and the LoRa gateway realizes LoRa communication with the power supply controller.
Further, comprising:
the LoRa application layer protocol is in the form of commands and responses, the contents of the commands and responses follow the same data frame format, and the data frame format is expressed as:
key value 1: field 1, key2: field 2, \8230;, key value 7: a field 7;
the corresponding set of key values is { T, M, D, C, B, Z, R }, and the corresponding set of fields is denoted as { (U, D) ("M { (U, D) }) 1 ”,“M 2 ”…“Mn”),(“D 1 ”,“D 2 ”…“Dm”),(W，S，I),(“00”-“100”),(N，A),(O，C)；
Wherein T is data type, S is sender ID, D is receiver ID, C is instruction, B is electric quantity, Z is mainboard state, R is battery relay state, U is node reply, D is terminal transmission, M is terminal transmission n ID, D, representing the nth sender m The ID of the mth receiver is shown, W shows that a relay is opened, equipment enters a working state, M shows that the relay is closed, the equipment is closed and enters a standby state, I shows that the equipment state is maintained unchanged, the slave equipment only returns to a state value, N shows that the system is normal, A shows that the system does not normally work, O shows that the relay is opened, and C shows that the relay is closed.
Further, it includes:
the key value corresponding to the data command of the main power supply of the relevant power supply controller is { C, B, Z, R }, and the field is: { (W, S, I), ("00" - "100"), (N, A), (O, C) }.
Further, it includes:
and when the terminal sends a data command, the key value C and the corresponding field (W, S, I) are the necessary data frames.
Further, comprising:
when the collection node answers the terminal, the key value B and the corresponding field ("00" - "100"), the key value Z and the corresponding field (N, a), and the key value R and the corresponding field (O, C) are optional data frames.
Further, comprising:
the central master station also comprises a central wireless network bridge which works in an access point mode and provides a wireless local area network with a certain frequency for the acquisition nodes, and the LoRa gateway is connected to the central wireless network bridge through a wired network.
Further, it includes:
the terminal sends debugging data and a command for returning the state information of the collection node to the collection node server, collects the analysis command of the node server and replies to the terminal.
On the other hand, the invention provides a communication method based on an extra/extra-high voltage power transmission and transformation project, which comprises the following steps:
the terminal adopts an LoRa application layer protocol to communicate with the LoRa gateway, the LoRa gateway is connected with the LoRa module to realize the LoRa communication with the power controller and send a command of a main power supply of the power controller to the power controller, and the LoRa module, namely a long-distance radio module, can realize the ultra-long distance wireless transmission based on the spread spectrum technology;
and after receiving the command of the main power supply of the power supply controller, the power supply controller analyzes the command and responds.
Further, it includes:
the method further comprises the following steps:
the terminal is in wireless communication with the acquisition node server through the central wireless network bridge and issues commands of debugging data and acquisition node state information to the acquisition node;
and after receiving the command of the debugging data issued by the acquisition node and the command of the state information of the acquisition node returned by the acquisition node server, the acquisition node server analyzes the command and responds.
Has the advantages that: 1. the central master station is connected with the acquisition node in a LoRa wireless communication mode, so that the terminal can wirelessly communicate with the acquisition node, the wiring workload of a transformer substation for starting a debugging test and the working strength of workers are greatly reduced, and the safety and the reliability of the test are improved; 2. according to the invention, loRa communication is adopted, and a corresponding application layer protocol is set, so that the acquisition node can close the main power supply to enter a standby state when signals do not need to be acquired, thereby greatly prolonging the working and standby time of the acquisition node, better meeting the requirements of starting and debugging tests of ultra/extra-high voltage power transmission and transformation engineering, and improving the safety and reliability of the tests.
Drawings
Fig. 1 is a block diagram of a communication system according to an embodiment of the present invention;
FIG. 2 is a diagram of a physical layer and data link layer topology of a wireless communication system according to an embodiment of the present invention;
fig. 3 is a topology diagram of an application layer of a wireless communication system according to an embodiment of the present invention;
fig. 4 is a system topology diagram of a wireless communication system field application according to an embodiment of the present invention;
FIG. 5 is a picture of a real object carrying a central master station according to an embodiment of the present invention;
FIG. 6 is a picture of a material object carrying a collection node according to an embodiment of the present invention;
FIG. 7 is a screenshot of the actual operation of the interface of the power control section of the collection node in the terminal software according to the present invention;
fig. 8 is a screenshot of a software interface when the terminal software actually records the video.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
As shown in fig. 1, 2, 5 and 6, the communication system of the present invention is divided into a central master station and a plurality of collection nodes, wherein the collection nodes are data collection terminals, and data of the collection nodes needs to be sent back to the wireless central master station in a wireless manner; the central master station is a core node of the whole communication system, communicates with all the acquisition nodes in a wireless mode, receives data of the acquisition nodes and transmits the data to the terminal, and the system usually comprises one wireless central master station and n acquisition nodes when used in a transformer substation field, wherein n is more than or equal to 1.
However, the number of the wireless master stations can be multiple, one of the wireless master stations is used as a central master station and a wireless access point, the other wireless master stations are used as wireless relay nodes, and the wireless master stations can intercommunicate with each other. The terminal can be set as a client PC, special client software is operated in the client PC to analyze data, so that the display of waveform and state information is completed, and the client PC is located in a relay protection room as shown in fig. 4.
The client software can realize functions such as data receiving, wave recording task issuing, triggering condition issuing, heartbeat detection and state information returning through a special protocol based on a TCP/IP technology, specifically, the central master station comprises a LoRa gateway and a central wireless network bridge, each acquisition node is integrated with an acquisition node server, a power controller and the wireless network bridge, the acquisition node server is an embedded ARMCPU, and the power controller comprises a main power supply and a corresponding main power supply switch, as shown in FIG. 3.
It should be noted that, in the embodiment of the present invention, both the central wireless bridge and the wireless bridge in the acquisition node employ a 5.8Ghz wireless bridge, and the client PC is connected to the wireless central master station using a wired or 5.8Ghz wireless network. The wireless center main station provides an access service of a 5.8Ghz local area network and corresponding equipment by an internal 5.8Ghz wireless network bridge, the LoRa gateway is accessed to the 5.8Ghz local area network through a wired network in the wireless center main station, and the other end provides a broadcast LoRa wireless network with 470Mhz-510Mhz frequency band. The acquisition node is internally integrated with a 5.8Ghz wireless network bridge and is accessed to a 5.8Ghz local area network in a station working mode. The power supply controller inside the collection node is integrated with a LoRa module and can receive LoRa broadcast and reply.
And (4) using the wireless network bridge, and actively connecting the acquisition node server after the client software establishes a project. The terminal issues debugging data and a command for returning the state information of the collection node to the collection node server, the collection node server analyzes the command and replies to the terminal, and the adopted protocol is a network application layer communication protocol.
Further, the embodiment of the present invention provides a possible implementation manner, where communication between the client software and the collection node is performed in a command-response mode, the collection node does not actively send any data, and only responds to a command from the client software, and the process includes:
client software issuing command → acquisition node receiving command → acquisition node replying command
The protocol specifies a uniform command frame format (i.e., a command issued by client software) and a uniform response frame format (i.e., contents replied by the acquisition node), and the specific contents are as follows:
TABLE 1 Command frame Format
The Type section indicates the category of the frame, and a value of "00" indicates that this is a command frame. The Command section is a category representing commands, the value of which is a Command number, and the collection node executes corresponding operations according to the Command number. The Length section represents the Length of the Payload section. Within the Payload section is the data part, which is placed if the client software needs to transfer some parameters or data.
The format of the response frame is identical to that of the Command frame except that the value of the Type section of the response frame is "01" and the value of the Command section is identical to that of the Command frame to which the response frame is responding. If the collection node needs to return data, the data is placed in the Payload section.
On the basis of the invention, the characteristics of low power consumption and large coverage range of the LoRa communication technology are utilized to realize the remote wireless power control of the acquisition node, so that a main power supply can be turned off to enter a standby state when the acquisition node does not need to work, thereby prolonging the service time of a battery.
The client software sends data to the LoRa gateway through a TCP/IP link with the LoRa gateway, and then the LoRa gateway realizes LoRa communication with the acquisition node. LoRa communication between the client and the collection node also defines a LoRa application layer protocol in an application layer so as to realize the power switch instruction of the power controller of the collection node, the acquisition of the battery power of the collection node and other contents.
It is worth to be noted that, in order to implement the remote wireless switch of the collection node, the invention also defines the protocol of the relevant application layer. The client software is connected with the LoRa gateway through a TCP/IP protocol, and the receiving and sending operation of the LoRa gateway is realized through the LoRa gateway. And the LoRa module of the acquisition node inputs and outputs data received and transmitted by the LoRa module in a serial port mode. And the associated application layer protocol based on LoRa is defined as follows:
further, a possible implementation manner is provided in the embodiment of the present invention, the application layer protocol based on LoRa adopts a command-response form, where the contents of the command and the response follow the same data frame format, and only the data type key value indicates whether the command is a command of the client software or a response of the collection node. Meanwhile, since the LoRa communication belongs to the broadcast communication on the physical layer, two key values, i.e., a sender ID and a receiver ID, are added to the protocol of the application layer to clarify the transmission source and the reception destination of the data frame, thereby preventing erroneous reception and response.
Data frame format example: { Key1: value1, key2: value2 \8230 }
The data frame format conforms to:
the parts within { } are defined in accordance with the standard json format
Key is Key value, meaning of' following field
Value is a Value or a field corresponding to a key Value, and in this embodiment, detailed key values and field definitions are shown in the following table:
table 2 application layer protocol key definition based on LoRa
In the table, the zebdoard is a development board and can be used as a main board of a power controller, the terminal requests the acquisition node to send parameters such as the electric quantity and the state of the main power supply, the acquisition node sends relevant state data to the terminal, and the terminal realizes remote control over the main power supply switch.
In summary, the data frame format of the application layer protocol of LoRa in this embodiment is represented as:
key value 1: field 1, key2: field 2, \ 8230; \ 8230;, key value 7: a field 7;
the corresponding set of key values is { T, M, D, C, B, Z, R }, and the corresponding set of fields is denoted as { (U, D) ("M { (U, D) }) 1 ”,“M 2 ”…“Mn”),(“D 1 ”,“D 2 ”…“Dm”),(W，S，I),(“00”-“100”),(N，A),(O，C)；
Wherein T is data type, S is sender ID, D is receiver ID, C is instruction, B is electric quantity, Z is mainboard state, R is battery relay state, U is node reply, D is terminal transmission, M is terminal transmission n ID, D, representing the nth sender m The ID of the mth receiver is shown, W shows that a relay is opened, equipment enters a working state, M shows that the relay is closed, the equipment is closed and enters a standby state, I shows that the equipment state is maintained unchanged, the slave equipment only returns to a state value, N shows that the system is normal, A shows that the system does not normally work, O shows that the relay is opened, and C shows that the relay is closed.
Thus, a user can operate the switch of the device in the client software through a software interface, as shown in fig. 7, which is a screenshot of the actual operation of the interface of the power control part of the collection node in the client software. The left graph is the state that the acquisition nodes are closed when the software is just started, the middle graph is the state that all the acquisition nodes are opened after clicking to open all the nodes, and the right graph is the state that all the acquisition nodes are closed again after clicking to close all the nodes. Therefore, the user can open the acquisition node to complete wave recording when wave recording is required to start, and can close the acquisition node to enter a standby state when wave recording is not required so as to save the battery power of the acquisition node.
After a user remotely turns on a power switch of the acquisition node, the equipment can enter a working state. Referring to fig. 8, this is an interface displayed by the client software when the project node a B C corresponding to the project Demo is recording. At the moment, the acquisition node acquires and converts the analog signal at the far end into a digital signal, then the wireless communication system stated by the invention is utilized to send the digital quantity signal to the client software, and finally the actually acquired analog waveform is restored and displayed on the client software.
On the basis of the system, the invention also provides a communication method for starting and debugging the ultra/extra-high voltage power transmission and transformation project, which adopts a combined communication mode of 5.8Ghz wireless network and LoRa wireless communication, the steps adopted by the communication mode have no specific sequence, the frequency of the LoRa module is 470-510Mhz, and the step S1S 2 is each communication function realized by matching with a proprietary application layer communication protocol. The wireless network is used for realizing data interaction between the acquisition node and the wireless center master station, issuing an instruction of the wireless center master station and returning the state of the acquisition node; the protocol adopts a response communication mode, namely, the PC client software of the wireless center master station sends a command downwards, and the acquisition node analyzes and replies the command to carry out communication. The protocol realizes the functions of data acquisition back transmission, heartbeat detection of connection of the acquisition nodes, state information back transmission of the acquisition nodes, issuing of trigger conditions, setting and issuing of engineering wave recording and the like.
The method comprises the following steps that S1, a terminal communicates with a LoRa gateway by adopting a LoRa application layer protocol, the LoRa gateway is connected with a LoRa module in a power controller, loRa communication with the power controller is achieved, and a command of a main power supply of the power controller is sent to the power controller;
and S2, after receiving the command of the main power supply of the power supply controller, the power supply controller analyzes the command and responds.
The steps S '1 and S'2 are based on LoRa wireless communication and are used for transmitting a remote power switch instruction and realizing remote wireless power switch control of the acquisition node, and the protocol adopts a response type communication mode, namely PC client software of a wireless center master station sends a command downwards through a LoRa gateway, and the acquisition node analyzes and replies the command. The protocol realizes the functions of switching on and off of a main power supply of the acquisition node, inquiring the electric quantity of the battery and the like.
The S'1 terminal is in wireless communication with the acquisition node server through the central wireless network bridge and issues commands of debugging data and acquisition node state information to the acquisition nodes;
and S'2, after receiving the command of the acquisition node for issuing the debugging data and returning the acquisition node state information, the acquisition node server analyzes the command and responds.
For the method embodiment, since it is substantially similar to the system embodiment, the description is simple, and reference may be made to the partial description of the system embodiment for relevant points.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass these modifications and variations.
Claims (3)
1. A communication system based on ultra/extra-high voltage power transmission and transformation engineering is characterized by comprising: central main website, terminal and with a plurality of collection nodes that central main website is connected, wherein:
the system comprises an acquisition node, a power supply controller, a LoRa module, a long-distance radio module and a communication module, wherein the acquisition node is used for acquiring data generated during debugging of ultra/extra-high voltage power transmission and transformation projects, the power supply controller is used for receiving connection actively initiated by a terminal and sending related data commands of a main power supply, the LoRa module is integrated in the power supply controller and receives LoRa broadcast by adopting a LoRa application layer protocol and responds after analysis, and the LoRa module, namely the long-distance radio module, can realize ultra-long-distance wireless transmission based on a spread spectrum technology;
the central master station is integrated with an LoRa gateway which is used for realizing the receiving and transmitting operation between the acquisition nodes and the terminals;
the terminal sends a related data command of a main power supply to the LoRa gateway, and LoRa communication between the terminal and the power supply controller is realized by the LoRa gateway;
the central master station also comprises a central wireless network bridge which works in an access point mode and provides a wireless local area network with a certain frequency for the acquisition node, the LoRa gateway is connected to the central wireless network bridge through a wired network, an acquisition node server and a wireless network bridge are integrated in the acquisition node, the wireless network bridge is accessed to the wireless local area network in a station working mode, the terminal issues debugging data and commands for returning acquisition node state information to the acquisition node server, and the terminal acquires the analysis commands of the node server and replies to the terminal;
the LoRa application layer protocol is in the form of commands and responses, the contents of the commands and responses follow the same data frame format, and the data frame format is expressed as:
key value 1: field 1, key2: field 2, \8230;, key value 7: a field 7;
the corresponding set of key values is { T, M, D, C, B, Z, R }, and the corresponding set of fields is denoted as { (U, D) ("M { (U, D) }) 1 ”,“M 2 ”…“Mn”),(“D 1 ”,“D 2 ”…“Dm”),(W，S，I),(“00”-“100”),(N，A),(O，C)；
Wherein T is data type, S is sender ID, D is receiver ID, C is instruction, B is electric quantity, Z is mainboard state, R is battery relay state, U is node reply, D is terminal transmission, M is terminal transmission n An ID indicating the nth sender,D m the ID of the mth receiver is shown, W shows that a relay is opened, equipment enters a working state, M shows that the relay is closed, the equipment is closed and enters a standby state, I shows that the equipment state is maintained unchanged, slave equipment only returns to a state quantity value, N shows that a system is normal, A shows that the system does not normally work, O shows that the relay is opened, and C shows that the relay is closed;
the key value corresponding to the data command of the main power supply of the power supply controller is { C, B, Z, R }, and the field is: { (W, S, I), ("00" - "100"), (N, a), (O, C) };
when the terminal sends a data command, the key value C and the corresponding fields (W, S, I) are necessary data frames;
when the collection node answers the terminal, the key value B and the corresponding field ("00" - "100"), the key value Z and the corresponding field (N, a), and the key value R and the corresponding field (O, C) are optional data frames.
2. The communication method realized by the communication system based on the ultra/extra-high voltage transmission and transformation project according to claim 1 is characterized by comprising the following steps of:
the terminal adopts an LoRa application layer protocol to communicate with the LoRa gateway, the LoRa gateway is connected with the LoRa module to realize the LoRa communication with the power controller and send a command of a main power supply of the power controller to the power controller, and the LoRa module, namely a long-distance radio module, can realize the ultra-long-distance wireless transmission based on the spread spectrum technology;
and after receiving the command of the main power supply of the power supply controller, the power supply controller analyzes the command and responds.
3. The communication method of claim 2, further comprising:
the terminal is in wireless communication with the acquisition node server through the central wireless network bridge and issues commands of debugging data and acquisition node state information to the acquisition node;
and after receiving the command of issuing the debugging data and returning the state information of the acquisition node by the acquisition node, the acquisition node server analyzes the command and responds.
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| CN114430531A (en) * | 2020-09-16 | 2022-05-03 | 中国石油化工股份有限公司 | GPS data transmission system, method, device, computer equipment and storage medium |
| CN113671411A (en) * | 2021-09-02 | 2021-11-19 | 云南电网有限责任公司电力科学研究院 | Substation short-circuit test overvoltage testing device and method based on LoRa communication |
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