CN-122027097-A - WiFi and power carrier redundancy backup communication method

CN122027097ACN 122027097 ACN122027097 ACN 122027097ACN-122027097-A

Abstract

The invention relates to the technical field of industrial communication and provides a WiFi and power carrier redundancy backup communication method which comprises the steps of simultaneously establishing a wireless communication channel and a power carrier communication channel between a client and a control end for transmitting data, periodically sending a heartbeat message containing signal strength information through two channels, receiving the heartbeat message by a switching control module, extracting wireless signal strength and power carrier signal to noise ratio, comparing the wireless signal strength with a preset wireless signal strength threshold value, comparing the power carrier signal to noise ratio with a preset power carrier signal to noise ratio threshold value, determining a main channel according to a comparison result, switching data transmission to the changed main channel when the main channel is changed, and continuously sending the heartbeat message by taking the other channel as a backup channel. The invention improves the reliability and stability of data transmission between the wind power engine room and the fan blades.

Inventors

Shi Lingdao
ZHOU HOUMING
LIU LEI

Assignees

武汉迈威通信股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260129

Claims (10)

1. The WiFi and power carrier redundancy backup communication method is applied to communication between a client and a control end, wherein the control end comprises a switching control module, and is characterized by comprising the following steps: Simultaneously establishing a wireless communication channel and a power carrier communication channel between the client and the control end, wherein the wireless communication channel and the power carrier communication channel are both used for transmitting data; periodically sending a heartbeat message through the wireless communication channel and the power carrier communication channel, wherein the heartbeat message comprises signal intensity information of the channel; Receiving the heartbeat message through the exchange control module, and extracting the wireless signal intensity of the wireless communication channel and the power carrier signal-to-noise ratio of the power carrier communication channel from the heartbeat message; Comparing the wireless signal intensity with a preset wireless signal intensity threshold value through the exchange control module, comparing the power carrier signal-to-noise ratio with a preset power carrier signal-to-noise ratio threshold value, and determining a main channel according to a comparison result; When the main channel changes, the exchange control module switches the data transmission to the changed main channel, takes the other channel as a backup channel and continues to send the heartbeat message.
2. The method of claim 1, wherein the preset wireless signal strength threshold comprises a first wireless signal strength threshold and a second wireless signal strength threshold, and the preset power carrier signal-to-noise ratio threshold comprises a first power carrier signal-to-noise ratio threshold and a second power carrier signal-to-noise ratio threshold; When the wireless signal strength is greater than the first wireless signal strength threshold, determining that the wireless communication channel is in a strong signal state; when the wireless signal strength is greater than the second wireless signal strength threshold and not greater than the first wireless signal strength threshold, determining that the wireless communication channel is in a medium signal state; When the wireless signal strength is not greater than the second wireless signal strength threshold, determining that the wireless communication channel is in a weak signal state; When the power carrier signal-to-noise ratio is greater than the first power carrier signal-to-noise ratio threshold, determining that the power carrier communication channel is in a strong signal state; when the power carrier signal-to-noise ratio is not smaller than the second power carrier signal-to-noise ratio threshold and is not larger than the first power carrier signal-to-noise ratio threshold, determining that the power carrier communication channel is in a medium signal state; and when the power carrier signal-to-noise ratio is smaller than the second power carrier signal-to-noise ratio threshold, determining that the power carrier communication channel is in a weak signal state.
3. The method of redundant backup communication for WiFi and power carrier according to claim 2, wherein the determining the main channel according to the comparison result includes: When the wireless communication channel is in a strong signal state and the power carrier communication channel is in a strong signal state, keeping the current main channel unchanged; Determining the power carrier communication channel as the primary channel when the wireless communication channel is in a weak signal state and the power carrier communication channel is in a strong signal state; Determining the wireless communication channel as the primary channel when the power carrier communication channel is in a weak signal state and the wireless communication channel is in a strong signal state; And triggering an alarm when the wireless communication channel is in a weak signal state and the power carrier communication channel is in a weak signal state.
4. The method of claim 3, wherein the first wireless signal strength threshold is minus seventy decibel milliwatts, the second wireless signal strength threshold is minus eighty decibel milliwatts, the first power carrier signal-to-noise ratio threshold is twenty decibels, and the second power carrier signal-to-noise ratio threshold is ten decibels.
5. The method of claim 1, wherein the heartbeat message includes a function code, status data, a check code, and a timestamp; the function code is used for identifying the type of the message; The state data comprises equipment information, running state, signal strength and negotiation rate; the check code is generated in a cyclic redundancy check mode; the time stamp is used for timeout determination.
6. The method for redundant backup communication between WiFi and power line carrier according to claim 1, wherein the transmission interval of the periodically transmitted heartbeat message is one hundred milliseconds to five hundred milliseconds; when the main channel changes, the switching time from the heartbeat message receiving to the channel switching completion of the switching control module is less than five hundred milliseconds.
7. The method for redundant backup communication between WiFi and power carrier according to claim 1, wherein the client is located in a fan blade control cabinet, and the control end is located in a cabin control cabinet; the wireless communication module in the client side works in a client side mode, the wireless communication module in the control side works in a hot spot mode, and the wireless communication module in the client side is connected with the wireless communication module in the control side through an antenna so as to establish the wireless communication channel; and the power carrier module in the client is connected with the power carrier module in the control end through a slip ring or a power cable so as to establish the power carrier communication channel.
8. The WiFi and power carrier redundancy backup communication method according to claim 1, wherein the wireless communication module in the client is connected to the ethernet module in the client through a universal serial bus interface, and the power carrier module in the client is connected to the ethernet module in the client through a simplified media independent interface; the wireless communication module in the control end is connected with the Ethernet module in the control end through a universal serial bus interface, and the power carrier module in the control end is connected with the Ethernet module in the control end through a simplified media independent interface; The Ethernet module in the client and the Ethernet module in the control end are respectively connected with the switching control module through Ethernet signals.
9. The method of claim 1, wherein the data acquisition and control module in the client is configured to acquire temperature information, humidity information, wind direction information and wind speed information, and control the blade deviation degree and the rotation speed according to a control signal sent by the control end; The data control unit in the control end is used for receiving information collected by the data collection and control module in the client end and issuing a control command to the data collection and control module in the client end.
10. The method of claim 1, wherein when the power carrier communication channel is the primary channel, the bi-directional data bandwidth of the power carrier communication channel is forty megabits per second without packet loss.

Description

WiFi and power carrier redundancy backup communication method Technical Field The invention relates to the technical field of industrial communication, in particular to a WiFi and power carrier redundancy backup communication method. Background The wind generating set is used as a core facility of clean energy equipment, and real-time and reliable data interaction is required between a cabin control system and a fan blade control system, wherein the data interaction comprises acquisition of environmental parameters such as temperature, humidity, wind direction, wind speed and the like, and issuing of control instructions such as blade deviation degree, rotating speed and the like. Because of the rotary motion between the engine room and the fan blades, the communication link must traverse the rotary structure, and meanwhile, the communication link needs to bear the influence of complex electromagnetic environment and severe weather conditions, and extremely high requirements are put on the reliability and stability of the communication system. In the prior art, the communication between the wind power cabin and the fan blade mainly adopts a single communication mode in optical fiber communication, industrial wireless communication or power carrier communication. However, the problem of low system reliability exists in a single communication mode, and when the optical fiber in the optical fiber communication is damaged and broken, or the quality of an interference signal of an industrial wireless communication by a metal structure and an electromagnetic environment in a cabin is unstable, or the power carrier communication is interfered by electromagnetic noise generated by power electronic equipment to cause data transmission errors, the whole wind power control system breaks down once the single communication path fails, uploading of fan state monitoring data and issuing of control instructions cannot be completed, and the safe operation and the power generation efficiency of the wind turbine generator are seriously affected. Disclosure of Invention In view of the above, the invention provides a WiFi and power carrier redundancy backup communication method, which solves the problems that when a single communication path is adopted in the prior art, when an optical fiber in optical fiber communication is damaged and broken, or industrial wireless communication is interfered by a metal structure in a cabin and electromagnetic environment to cause unstable quality of interference signals, or power carrier communication is interfered by electromagnetic noise generated by power electronic equipment to cause data transmission errors, the whole wind power control system breaks down once the single communication path fails, uploading of fan state monitoring data and issuing of control instructions cannot be completed, and the safe operation and the power generation efficiency of a wind turbine generator are seriously affected. The technical scheme of the invention is realized in such a way that the invention provides a WiFi and power carrier redundancy backup communication method which is applied to communication between a client and a control end, wherein the control end comprises an exchange control module and comprises the following steps: Simultaneously establishing a wireless communication channel and a power carrier communication channel between the client and the control end, wherein the wireless communication channel and the power carrier communication channel are both used for transmitting data; periodically sending a heartbeat message through the wireless communication channel and the power carrier communication channel, wherein the heartbeat message comprises signal intensity information of the channel; Receiving the heartbeat message through the exchange control module, and extracting the wireless signal intensity of the wireless communication channel and the power carrier signal-to-noise ratio of the power carrier communication channel from the heartbeat message; Comparing the wireless signal intensity with a preset wireless signal intensity threshold value through the exchange control module, comparing the power carrier signal-to-noise ratio with a preset power carrier signal-to-noise ratio threshold value, and determining a main channel according to a comparison result; When the main channel changes, the exchange control module switches the data transmission to the changed main channel, takes the other channel as a backup channel and continues to send the heartbeat message. On the basis of the above technical solution, preferably, the preset wireless signal strength threshold includes a first wireless signal strength threshold and a second wireless signal strength threshold, and the preset power carrier signal-to-noise ratio threshold includes a first power carrier signal-to-noise ratio threshold and a second power carrier signal-to-noise ratio threshold; When the wireless signal strength is greater