CN114143736A

CN114143736A - High-penetration high-speed LORA wireless transmission system based on power distribution room

Info

Publication number: CN114143736A
Application number: CN202111439858.4A
Authority: CN
Inventors: 谢善荣; 李振国; 张亮; 庞永新
Original assignee: Hebei Xinda Changyuan Electric Power Technology Co ltd
Current assignee: Hebei Xinda Changyuan Electric Power Technology Co ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-03-04

Abstract

The invention discloses a high-penetration high-speed LORA wireless transmission system based on a power distribution room, which comprises: the main machine comprises a main controller and a plurality of coordinators, the main controller and the coordinators are coordinated through a ttl serial bus, and the coordinators are communicated through a LoRa equipment matrix set. The invention provides a high-speed, high-issuing and high-anti-interference LoRa transmission method, which is characterized in that multi-channel data are wirelessly transmitted to a host end through LoRa at high speed and are finally transmitted to a cloud end through a network cable, complete collection and transmission of 96 sub-node data with maximum load in about 10s of internal data of a distribution room are realized, and intellectualization, stabilization and safety of monitoring of the distribution room are realized.

Description

High-penetration high-speed LORA wireless transmission system based on power distribution room

Technical Field

The invention belongs to the technical field of wireless communication, and particularly relates to a high-penetration high-speed LORA wireless transmission system based on a power distribution room.

Background

Along with the large-scale transformation of urban networks and rural networks of power systems in China and the upgrading of large-scale industrial and mining enterprises, the requirement of a transformer substation on the automation degree is higher and higher, the requirement is that the operation condition of the whole power grid can be comprehensively monitored, the state of primary equipment can be monitored, and four-remote monitoring, historical records, reports, accident analysis and the like can be realized; however, in order to realize real automation of scheduling, the power system must be realized by combining a computer technology and a communication technology and a telemechanical control technology; therefore, the telecontrol technology plays an important role in accelerating the automation process of the power system; the functions realized by the telemechanical control technology of the power system mainly comprise functions of remote measurement (YC), remote signaling (YX), remote control (YK) and remote regulation (YT), which are called four-remote functions for short, and in order to ensure the reliable realization of various telemechanical functions of the power system, the specific telemechanical control is realized mainly by three parts, namely a data acquisition technology, a channel coding technology and a communication transmission technology; however, the telecontrol signal transmission system and the like in the existing intelligent power distribution room are also used in a mature way, but the telecontrol signal transmission method and the like in the existing system are simpler, can not be used simply and used for transmitting telecontrol signals quickly, and are not beneficial to the maintenance of equipment in the later period.

In order to realize that each index of the distribution room is quickly and stably transmitted to the cloud server for remote monitoring and realize abnormal early warning of various data of the distribution room, the intelligent popularization of the distribution room needs to transmit the data to the cloud end within a few seconds. Every sub-equipment in the electricity distribution room is placed in the iron cabinets such as GCS, GGD, and the iron cabinet is a huge shielding cover for wireless data, and the transmission of the data is seriously interfered. However, in the radio frequency communication, it cannot be guaranteed that data is transmitted to the cloud in time; 485's wiring is with high costs and be unfavorable for the intelligent transformation construction of later stage electricity distribution room, and this kind of traditional data transmission mode is very big increases the cost, and unable efficient transmission data, and be unfavorable for the maintenance in later stage to maintain the guarantor. In the high-speed LoRa communication realized by the technology, a scheme of multi-channel parallel and single-channel serial is adopted to support transmission of near-hundred frame data within a few seconds. In the protocol mode of LoRa-wan, the gateway performs coordinated routing and data forwarding in a single channel. The present technique may therefore be more advantageous in terms of speed.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a high-speed, high-issuing and high-anti-interference LoRa transmission system, which is used for wirelessly transmitting multi-channel data (including all data in a high-voltage incoming cabinet, an outgoing cabinet, a PT cabinet, a low-voltage incoming cabinet, an outgoing cabinet, a capacitor cabinet and a bus coupler cabinet) to a host end at a high speed through LoRa, and finally transmitting the data to a cloud end through a network cable, so that the complete collection and transmission of 96 subnode data with maximum load in about 10s of the internal data of a distribution room are realized, and the intellectualization, the stabilization and the safety of monitoring of the distribution room are realized.

To achieve the above object, the present invention provides a power distribution room-based high-penetration and high-rate LORA wireless transmission system, including: the main machine comprises a main controller and a plurality of coordinators, the main controller and the coordinators are coordinated through a ttl serial bus, and the coordinators are communicated through a LoRa equipment matrix set.

Optionally, the serial bus further includes an SS line for connecting to the coordinator.

Optionally, the master controller communicates with a plurality of coordinators through serial ports, and each coordinator communicates with a plurality of slaves.

Optionally, the coordinator actively initiates a request to the slave in the LoRa bus, the slave replies corresponding data after responding, and the coordinator receives the data and requests the serial port bus to send the data to the master controller.

Optionally, the LoRa equipment is arranged through the matrix, and each row communicates with a coordinator, categorised LoRa transmission channel divides into a set with 32 passageways every adjacent channel, counts 16 groups altogether, corresponds the total 16 rows of matrix LoRa, and the rank order is subdivided, and the LoRa matrix divide into 16 rows 6 lines, counts 96 subnodes altogether.

Optionally, the coordinator uses the same serial bus, and the dual-bus module communicates with the LoRa device.

Optionally, a bi-directional CRC16 is used for checking during transmission.

Optionally, the 433 carrier frequency band is adopted in the LoRa for receiving data.

The invention has the technical effects that:

(1) the high speed, the wireless bus communication speed can reach 2400bps, and the serial bus communication speed can reach 115200 bps. (2) High concurrency, subdivided by a matrix LoRa, and maximum 16-path data simultaneous transmission can be supported. (3) The data is reliable, and the bidirectional CRC16 is used for checking in transmission to ensure that the data is reliable. (4) Strong anti-interference, adopt 433 carrier wave frequency channels in the loRa, abandon 868, 915 equal frequency channels, have and pierce through with strong interference killing feature by force. In the high-speed LoRa communication that this application realized, adopt multichannel parallel, the serial scheme of single channel, support to transmit nearly hundred frame data in several seconds. In the protocol mode of LoRa-wan, the gateway performs coordinated routing and data forwarding in a single channel. The present application may therefore be more rate-advantageous.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:

fig. 1 is a schematic structural diagram of an overall scheme of a first embodiment of the present invention.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.

Example one

As shown in fig. 1, the present embodiment provides a high penetration and high speed LORA wireless transmission system based on power distribution room, which includes:

the main machine comprises a main controller and a plurality of coordinators, the main controller and the coordinators are coordinated through a ttl serial bus, and the coordinators are communicated through a LoRa equipment matrix set.

Master controller, coordinator 1, coordinator 2, coordinator n, etc. with slave 11, slave 12, slave nn, etc. The master controller is communicated with the plurality of coordinators through serial ports, and each coordinator is communicated with the plurality of slave computers. The coordinator actively initiates a request to the slave in the LoRa bus, the slave replies corresponding data after corresponding, and the coordinator requests the serial port bus after receiving the data and sends the data to the main controller. The arrangement of the slave machines uses a matrix mode, in order to achieve the purpose of high-speed communication, the upper limit of each row of equipment is set to be 6, the row changing equipment is responsible for one coordinator, the total upper limit of the coordinators is 16, and the slave machines can be arranged with 16 rows by 6 columns to totally 96 slave equipment so as to ensure that the transmission is completed in 10s of data.

The serial port bus also comprises an SS line which is used for connecting the coordinator.

The master controller communicates with a plurality of coordinators through serial ports, and each coordinator communicates with a plurality of slaves.

The coordinator actively initiates a request to the slave in the LoRa bus, the slave replies corresponding data after responding, and the coordinator requests the serial port bus after receiving the data and sends the data to the main controller.

LoRa (Long Range Radio ) is a recently widely used low power consumption local area network wireless physical layer standard. The LoRa is characterized in that the distance of propagation is longer than that of other wireless modes under the same power consumption condition, 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 condition.

The LoRa equipment passes through the matrix arrangement, and every line communicates with a coordinator, categorised LoRa transmission channel divide into a set with 32 passageways branch every close to the passageway, 16 groups total, correspond the total 16 rows of matrix LoRa, and the column sequence is subdivided, and the LoRa matrix divide into 16 rows 6 lines, 96 subnodes total.

The LoRa gateway is used for a long-distance star-shaped framework and supports multi-channel, multi-modulation transceiving and multi-channel simultaneous demodulation. Because the transmission characteristics of the LoRaWAN support simultaneous multi-signal demodulation on the same channel, it has a higher capacity than other lan communication protocols. The LoRa gateway uses RF devices other than end nodes as a transparent bridge to relay messages between end devices and a central network server. The terminal equipment unicasts the wireless communication message to one or more LoRa gateways, and the LoRa gateways are connected to a central network server to other application servers through a standard TCP/IP protocol.

LoRaWAN is a communication protocol based on LoRa technology. The LoRaWan technology has been widely applied to various applications of the internet of things, and the stability, reliability and networking flexibility of the LoRaWan technology are acknowledged by the industry. In the embodiment of the invention, the LoRaWan technology is adopted to effectively supplement a 5G public network communication mode and is mainly used for transmitting low-speed safety data. A plurality of LoRa communication modules are integrated in the wireless communication module; each LoRa communication module supports LoRaWan protocol. According to the corresponding bytes of the application layer protocol, the relevant parameters of the LoRa communication module can be modified to specify the frequency, the channel and the data rate.

Correspondingly, the micro control unit is also connected with all LoRa communication modules, and assigns a transmission mode, a packet packaging mode and an encryption and decryption mode in a self-adaptive mode according to an application layer protocol. The method comprises the steps of evaluating an LoRa networking mode and network signal quality through analyzing application layer data, and configuring the networking mode, channel allocation and working frequency through an application layer protocol.

The coordinator adopts the same serial port bus, and the double-bus module is communicated with the LoRa equipment.

During transmission, the bidirectional CRC16 is used for checking, and a data packet sending party uses the last 2 bytes as the storage bytes of a CRC code to calculate and store the CRC check value of the data frame; after receiving the data, the receiver calculates the CRC value of the data frame first, and checks whether the CRC value is the same as the CRC code of 2 bytes at the tail of the data packet, so as to determine the integrity of the data.

The 433 carrier frequency band is adopted in LoRa for receiving data.

The invention aims to provide a high-speed, high-issuing and high-anti-interference LoRa transmission method, which is used for wirelessly transmitting multi-channel data (including all data in a high-voltage incoming line cabinet, an outgoing line cabinet, a PT cabinet, a low-voltage incoming line cabinet, an outgoing line cabinet, a capacitor cabinet and a bus coupler cabinet) to a host end at a high speed through LoRa, and finally transmitting the data to a cloud end through a network cable, aiming at realizing complete collection and transmission of data of 96 subnodes with maximum load in about 10s of the internal data of a power distribution room, and realizing intellectualization, stabilization and safety of monitoring of the power distribution room.

The invention has the technical effects that:

The above description is only for the preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A high penetration, high rate LORA wireless transmission system based on a power distribution room, comprising:

2. A high penetration, high rate LORA wireless transmission system based on a distribution room as claimed in claim 1, wherein said serial bus further includes an SS line for connection to a coordinator.

3. The electrical distribution room-based high penetration, high rate LORA wireless transmission system of claim 2 wherein the master controller communicates with a plurality of coordinators via serial ports, each coordinator communicating with a plurality of slaves.

4. The power distribution room-based high-penetration high-rate LORA wireless transmission system as claimed in claim 3, wherein the coordinator actively initiates a request to the slave computers in the LoRa bus, the slave computers reply corresponding data after responding, and the coordinator requests the serial port bus after receiving the data and sends the data to the master controller.

5. The wireless studio-based high penetration, high rate LORA transmission system of claim 4 wherein the LORA devices are arranged in a matrix, each row communicating with a coordinator, the LORA transmission channels are classified, 32 channels are grouped into groups of 16 groups each adjacent channel, the corresponding matrix LORA has 16 rows, the sequence is subdivided, and the LORA matrix is divided into 16 rows and 6 columns, and 96 sub-nodes.

6. The wireless transmission system of claim 5 for high penetration and high rate LORA based on power distribution room, wherein the coordinator uses the same serial bus, and the dual bus module communicates with the LORA device.

7. The electrical distribution room-based high penetration, high rate LORA wireless transmission system of claim 6 wherein the transmissions are checked using a bi-directional CRC 16.

8. The electrical distribution room-based high penetration, high rate LORA wireless transmission system of claim 7, wherein the 433 carrier frequency band is used in LORA for receiving data.