CN112566166A - Self-healing ad hoc network communication system of smart power grid - Google Patents
Self-healing ad hoc network communication system of smart power grid Download PDFInfo
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- 238000006243 chemical reaction Methods 0.000 claims description 3
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- H—ELECTRICITY
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- 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
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The invention discloses a self-healing ad hoc network communication system of a smart power grid, which comprises: the system comprises a plurality of power grid towers, wherein each power grid tower in the plurality of power grid towers is provided with an ad hoc network communication device, the ad hoc network communication device is provided with a wireless network card module, the wireless network card module adopts a WiFi network card with a USB interface, and the wireless network card module comprises: the system comprises an RT5572 wireless network card, a power amplifier and a gain antenna, wherein the RT5572 wireless network card is connected with the power amplifier, the power amplifier is connected with the gain antenna, and the ad hoc network communication devices on the plurality of power grid towers communicate with each other by adopting a DSR dynamic routing protocol. The present whole-area wireless communication private network in the embodiment of the invention covers, saves high wiring cost, realizes self-healing function of the self-networking, and maintains stability of the local area network.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a self-healing ad hoc network communication system of a smart power grid.
Background
The digitalized transformation and construction of the power grid have the requirement of mass Internet of things data access, and the construction of an economic, flexible, bidirectional, real-time, safe and reliable omnibearing-coverage ubiquitous and full-coverage terminal communication access network is urgently needed. The southern power grid company also makes strategic deployment aiming at the last kilometer of a WAPI security network access transformer substation, but the traditional AP point selection and service access scheme is adopted, a large amount of wiring work is needed, the coverage is not wide, and the network single-point paralysis can cause the whole network paralysis state.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a self-healing ad hoc network communication system of a smart power grid, so that the existing wireless communication link can automatically heal under the conditions of interference and the like, and the link quality is guaranteed.
In order to solve the above technical problem, an embodiment of the present invention provides a self-healing ad hoc network communication system for a smart grid, where the self-healing ad hoc network communication system for the smart grid includes: the self-networking communication device is arranged on each of the plurality of power grid towers, a wireless network card module is arranged on the self-networking communication device, the wireless network card module adopts a WiFi network card with a USB interface, the USB interface enables embedded hardware with the USB host interface to be connected with the wireless network card module, the wireless network card module conforms to the standards of IEEE802.11b/g/n and IEEE802.11a and supports 300Mbps PHY transmission rate, and the wireless network card module comprises: the system comprises an RT5572 wireless network card, a power amplifier and a gain antenna, wherein the RT5572 wireless network card is connected with the power amplifier, the power amplifier is connected with the gain antenna, and the ad hoc network communication devices on the plurality of power grid towers communicate with each other by adopting a DSR dynamic routing protocol.
The self-healing ad hoc network communication system of the smart power grid is a centerless common frequency system, all nodes are equal in status, and a single frequency point supports TDD bidirectional communication.
The self-healing self-networking communication system of the smart power grid realizes self-healing of a communication link by adopting a self-adaptive frequency hopping and FCS (FCS based technology).
The gain antenna comprises a high-power 5G frequency band directional antenna.
The ad hoc network communication device is provided with an intelligent induction electricity taking device, the electricity taking device is made of permalloy as a magnetic core material, and the power supply requirements of the intelligent device and the multiple sensors are met through one-time input conversion of a high-voltage circuit.
The self-adaptive frequency hopping adopts an idle channel scanning technology to scan the channel frequency interference situation, and modifies or replaces a frequency hopping frequency table according to the scanning result.
The self-healing ad hoc network communication system of the smart power grid provided by the embodiment of the invention realizes the coverage of a whole-area wireless communication private network, saves high wiring cost, can automatically select a nearby router after single-point access is broken down, realizes the self-healing function of the ad hoc network, maintains the stability of the local area network, ensures that all online monitoring data can be transmitted on a wireless communication network line, and ensures that all data in a working place are transmitted back to a server in real time for processing and monitoring.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a self-healing ad hoc network communication system of a smart grid in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a self-healing ad hoc network communication device according to an embodiment of the present invention;
fig. 2 is a schematic block diagram of a wireless network card according to an embodiment of the present invention.
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 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.
Fig. 1 shows a schematic structural diagram of a self-healing ad hoc network communication system of a smart grid in an embodiment of the present invention, where the self-healing ad hoc network communication system of the smart grid includes: the self-networking communication device comprises a plurality of power grid towers, wherein each power grid tower in the plurality of power grid towers is provided with a self-networking communication device, a wireless network card module is arranged on each self-networking communication device, the wireless network card module adopts a WiFi network card with a USB interface, the USB interface enables embedded hardware with the USB host interface to be connected with the wireless network card module, the wireless network card module conforms to the standards of IEEE802.111b/g/n and IEEE802.11a and supports the transmission rate of 300Mbps PHY, and the self-networking communication devices on the plurality of power grid towers communicate with one another by adopting a DSR dynamic routing protocol.
Specifically, the wireless communication technology is a WiFi communication technology based on 2.4G frequency bands and 5.8G frequency bands, and 2.4G frequency band signals are used for realizing wireless communication signal coverage around the tower, and the wireless communication technology is used for facilitating field terminal equipment to access and transmit data and transmitting the data to a data communication link through a current ad hoc network.
Specifically, the wireless signals of the 5.8G frequency band are matched with the high-power directional antenna to realize long-distance wireless connection. The multi-level wireless communication is connected with each other to form wireless communication networking, the connection process of the remote equipment is in a full-automatic intelligent connection mode, and the link nodes search substation equipment with strongest signals around the link nodes to connect to complete networking. The data can be transmitted step by step in the network and transmitted back to the remote monitoring center at the final stage.
The self-healing ad hoc network communication system of the smart power grid is a centerless common frequency system, all nodes are equal in status, and a single frequency point supports TDD bidirectional communication.
The self-healing self-networking communication system of the smart power grid realizes self-healing of a communication link by adopting a self-adaptive frequency hopping and FCS (FCS based technology).
The gain antenna comprises a high-power 5G frequency band directional antenna.
The Ad hoc network communication device is provided with an intelligent induction electricity taking device, the intelligent communication device is provided with an intelligent induction electricity taking device, the electricity taking device is made of permalloy as a magnetic core material, the size of a bare chip is 55mm long, 75mm wide and 20mm high, secondary output voltage can reach 24V through primary input conversion of a high-voltage circuit, and power supply requirements of the intelligent device and the multiple sensors are met.
The self-adaptive frequency hopping adopts an idle channel scanning technology to scan the channel frequency interference situation, and modifies or replaces a frequency hopping frequency table according to the scanning result.
Specifically, fig. 2 shows a self-healing ad hoc network communication device in an embodiment of the present invention, where the self-healing ad hoc network communication device includes: the multi-serial-port control system comprises a plurality of sub-serial ports (namely a first sub-serial port, a second sub-serial port, a third sub-serial port, an Nth sub-serial port and the like), a multi-serial-port control module, a microcontroller, a wireless network card module and a processor, wherein the plurality of sub-serial ports are used for being connected with a plurality of sensors (namely a first sensor, a second sensor, a third sensor, an Nth sensor and the like) on a power grid tower, the plurality of sub-serial ports are connected with the multi-serial-port control module, the multi-serial-port control module is connected with the microcontroller, and the microcontroller is connected with.
The multi-serial port control module can be connected with a plurality of sensors based on a plurality of sub-serial ports and is used for receiving serial port data frames of the sensors connected to the serial port line, and the serial port data frames encapsulate data acquired by the sensors on the power grid tower; the microcontroller is used for encapsulating the serial port data frame in a wireless data frame and forming a wireless data stream, and the wireless data stream is encapsulated with sensor data; and the wireless network card module is used for sending the wireless data stream to a corresponding data node or a server through a network.
In addition, the sensors of the plurality of sensors include: temperature sensor, voltage sensor, current sensor, humidity sensor.
In a specific implementation process, fig. 2 shows a schematic structural diagram of a wireless network card module in an embodiment of the present invention, which includes: the wireless network card module used by the system is a WiFi network card adopting a universal USB interface, and the network card module is suitable for wireless communication in a wireless local area network. The universal USB interface enables all embedded hardware comprising the USB host interface to be connected with the universal USB interface, and the wireless communication function of the embedded hardware is conveniently expanded. The local area network communication function of the module is realized by an RT5572N chip of Ralink, conforms to the standards of IEEE802.11b/g/n and IEEE802.11a, supports the transmission rate of 300Mbps PHY, and meets the communication requirements under various environments.
An XQ-02A type power amplifier is used in 2.4G and 5.8G high-frequency band wireless communication signal transceivers. The XQ-02A bidirectional signal amplification module is specially designed for wireless local area network communication, the device has small and exquisite appearance, is simple and convenient to use, has obvious amplification effect on input signals, and can be conveniently connected with most wireless network card modules. The use of the power amplifier can increase the transmission distance between the wireless ad hoc network terminals, optimize the transmission effect of streaming media data such as video, voice and the like, and provide more reliable guarantee for information communication between networks. The power amplifier module is integrated with an intelligent data receiving and transmitting judging circuit module, so that the receiving and transmitting of network card data can be monitored in real time. When data is transmitted, the amplifier enters a working state, and when no data is transmitted, the amplifier enters a closing state, so that the power consumption is reduced to the maximum extent.
Specifically, the network layer of the wireless self-healing networking adopts a DSR dynamic routing protocol, which is a typical on-demand routing protocol. It uses a source routing mechanism. The node determines the route through which the packet passes. The header of each packet contains the entire routing information. The passing relay node or router forwards the data packet according to the routing sequence in the header of the received data packet. The basic idea based on dynamic routing is combined with a TCP/IP protocol stack to design a dynamic routing protocol based on an IP core, thereby realizing multi-hop self-organizing dynamic networking of the wireless networking communication terminal and ensuring wireless self-organizing network communication.
Specifically, the wireless networking self-healing technology mainly adopts self-adaptive frequency hopping and idle channel scanning FCS technology. The self-adaptive frequency hopping adopts an idle channel scanning technology to scan the channel frequency interference situation, modifies or replaces a frequency hopping frequency table according to the scanning result, so that the channel transmission error rate is kept at a lower level, and the optimal wireless frequency point (the signal field intensity is lowest) detected by the method is selected during communication to send out the identification signal of the call on the optimal wireless frequency point. And the receiver detects that the signal exists on the frequency point in the scanning process and identifies the signal as an effective signal, and then starts to receive data. After the communication is finished, the channel is released, and the two parties return to the channel scanning state again. The idle channel scanning technology is used as an auxiliary technology of the frequency hopping anti-interference technology, and has the following functions: the working frequency resources of the system are monitored in real time, the monitoring result is used for updating the frequency hopping frequency table of the system, the system is helped to avoid a strong interference source, the adaptability of the system to the complex electromagnetic environment of the VHF frequency band is improved, and the anti-interference capability of the frequency hopping system is fully exerted. When the same frequency point continuously exceeds the set threshold for multiple times, the frequency point is considered to be interfered and should be deducted from the frequency table. When the receiving end considers that the frequency point should be deducted, the deduction mark and the frequency point number are sent to the sending end, and the deduction confirmation signal is returned after the sending end receives the deduction mark and the frequency point number. After the receiving end receives the confirmation signal, the receiving end and the transmitting end do not use the frequency point any more. When the result of the N continuous channel scans of the deducted frequency point is less than the set interference threshold, the receiving end considers that the frequency point can be used, and sends the usable mark and the frequency point number to the sending end, and the sending end returns the usable confirmation signal after receiving the usable mark and the frequency point number. The receiving and transmitting parties can reuse the frequency point. When the interfered frequency points exceed a certain number, the frequency table is replaced by the handshaking mode at the receiving end and the transmitting end.
FCS is an anti-blocking interference access technology, tens of frequency points are prefabricated in each radio station in a system to serve as a working frequency table, when no data is sent, an on-duty station is in a channel scanning state, and whether effective signals exist in each frequency point or not is analyzed in turn. And when the signals of a certain frequency point contain effective signals, starting receiving, and judging whether the frequency point has normal communication signals or not according to the received data content. Before communication starts, the two parties select the best receiving frequency point set of the party in a channel scanning state; when the communication starts, the opposite side is informed to transmit on the own optimal frequency point in a late network access process or an initial synchronization process in a full-band broadcasting mode; in the communication process, the channel state can be scanned in real time to update the own best frequency point set, and if the current frequency point is interfered, the backup frequency point in the best frequency point set can be started for communication; after the channel scanning is finished, the channel is released, and the two parties return to the channel scanning state again. The ultra-narrow band transmission technology is an extreme communication technology and has the characteristics of high receiving sensitivity, small occupied bandwidth and the like. The two communication parties modulate the low-speed data in a narrow bandwidth for transmission, the energy of the transmitted signal is concentrated in the narrow bandwidth, and the interference noise energy entering the narrow-band receiver is low, so that a high signal-to-noise ratio can be obtained.
The self-healing ad hoc network communication system of the smart power grid provided by the embodiment of the invention realizes the coverage of a whole-area wireless communication private network, saves high wiring cost, can automatically select a nearby router after single-point access is broken down, realizes the self-healing function of the ad hoc network, maintains the stability of the local area network, ensures that all online monitoring data can be transmitted on a wireless communication network line, and ensures that all data in a working place are transmitted back to a server in real time for processing and monitoring.
The above embodiments of the present invention are described in detail, and the principle and the implementation manner of the present invention should be described herein by using specific embodiments, and the above description of the embodiments is only used to help understanding the method of the present invention and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (6)
1. The utility model provides a self-healing ad hoc network communication system of smart power grids, its characterized in that, self-healing ad hoc network communication system of smart power grids includes: the self-networking communication device is arranged on each of the plurality of power grid towers, a wireless network card module is arranged on the self-networking communication device, the wireless network card module adopts a WiFi network card with a USB interface, the USB interface enables embedded hardware with the USB host interface to be connected with the wireless network card module, the wireless network card module conforms to the standards of IEEE802.11b/g/n and IEEE802.11a and supports 300Mbps PHY transmission rate, and the wireless network card module comprises: the system comprises an RT5572 wireless network card, a power amplifier and a gain antenna, wherein the RT5572 wireless network card is connected with the power amplifier, the power amplifier is connected with the gain antenna, and the ad hoc network communication devices on the plurality of power grid towers communicate with each other by adopting a DSR dynamic routing protocol.
2. The self-healing ad hoc network communication system of the smart grid according to claim 1, wherein the self-healing ad hoc network communication system of the smart grid is a centerless co-frequency system, all nodes are in equal status, and a single frequency point supports TDD bidirectional communication.
3. The self-healing ad-hoc network communication system according to claim 2, wherein the self-healing ad-hoc network communication system realizes communication link self-healing by adopting FCS technology based on adaptive frequency hopping and idle channel scanning.
4. The self-healing ad hoc network communication system of claim 3, wherein the booster antenna comprises a high power 5G frequency band directional antenna.
5. A self-healing ad hoc network communication system according to claim 4, wherein an intelligent induction electricity-taking device is arranged on the ad hoc network communication device, a magnetic core material of the electricity-taking device is permalloy, and power supply requirements of the intelligent device and the multi-sensor are met through one-time input conversion of a high-voltage circuit.
6. A self-healing ad hoc network communication system according to any one of claims 1 to 5, wherein the adaptive frequency hopping employs an idle channel scanning technique to scan channel frequency interference conditions, and the frequency hopping table is modified or replaced according to the scanning result.
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| CN113596974A (en) * | 2021-09-28 | 2021-11-02 | 广东电网有限责任公司中山供电局 | Energy-saving device for chain type wireless ad hoc network equipment |
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| CN113596974A (en) * | 2021-09-28 | 2021-11-02 | 广东电网有限责任公司中山供电局 | Energy-saving device for chain type wireless ad hoc network equipment |
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