CN110351344B - LoRa and 4G communication system of distributed power grid fault recorder - Google Patents
LoRa and 4G communication system of distributed power grid fault recorder Download PDFInfo
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
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- H—ELECTRICITY
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- H04L41/06—Management of faults, events, alarms or notifications
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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Abstract
The invention discloses a LoRa and 4G communication system of a distributed power grid fault recorder, which comprises: the system comprises a plurality of sensing units, a collecting unit and a remote server, wherein the sensing units are respectively arranged on a three-phase high-voltage transmission line to be monitored and used for acquiring three-phase working condition information of the high-voltage transmission line in real time and interacting the information with the collecting unit and the remote server through LoRa short-range communication and 4G remote communication; the collecting unit is arranged on the telegraph pole close to the sensor unit nearby and is used for receiving and transmitting fault information and forwarding some instructions; and the remote server is arranged in an office area and used for collecting data or fault information sent by the sensing unit and/or the collecting unit through 4G remote communication and sending corresponding instruction configuration to the sensing unit and/or the collecting unit. The invention greatly improves the cooperativity of human-computer interaction through efficient and stable communication, is beneficial to discovering potential danger in line operation, protecting the operation safety of an electric power system and improving the operation reliability of the intelligent power grid.
Description
Technical Field
The invention relates to the technical field of communication systems of power grid fault oscillographs, in particular to a communication system of a distributed power grid fault oscillograph.
Background
The fault recorder is an automatic recording device for the information of a power distribution network which is put into operation all the year round and is used for monitoring the operation condition of a power system and timely processing faults. When a fault accident occurs in the power system, the change conditions of various electrical quantities before and after the fault are automatically and accurately recorded, the change conditions are used for analyzing the cause of the fault and observing the whole course of the fault development, the fault is timely processed to reduce loss, the configuration and management of a power grid are perfected, the reoccurrence of similar accidents is avoided, and the important effect is achieved on improving the safe operation level of the power system.
With the development of economy and the improvement of the living standard of people, people put forward higher requirements on power supply quality and higher standards on power supply reliability. Therefore, monitoring the quality of the electric energy is particularly important for the normal operation of the power grid and the power supply and distribution system. In order to guarantee safe, economic operation and normal use of a power grid, power transmission and distribution equipment, electric equipment and devices and guarantee continuous and reliable electric energy to users, the electric energy quality of a power system must be scientifically monitored in real time, and the power supply condition of the power grid is improved.
At present, smart power grids develop gradually, internet related technologies are integrated into power grid design and management, especially advanced communication technologies, advanced data processing and storage technologies, advanced visualization technologies and decision support system technologies, and an intelligent system which is wide in coverage, sufficient in information quantity, convenient and fast in communication and accurate in decision judgment is innovatively built by combining sensor technologies, measurement technologies, equipment technologies, control methods and the like, so that reliable and safe use and economical and efficient management of power grids are realized, and especially, the effects on monitoring, identifying and processing of power grid line faults and the like are obvious.
The traditional microcomputer type fault recorder adopts a centralized structure, generally operates in a mode of a background, a background PC is limited by the mechanical strength of the PC, the reliability is low, the communication is often unstable, and the long-term operation is difficult, so that the popularization and the application of the traditional fault recorder in a large range are seriously restricted.
In the existing communication technology, flow charge can be generated through signals which can be identified by a 2G/3G/4G or a local area network; the local area network has weak network coverage capability, is greatly influenced by the environment, has poor communication quality in the peak period or in the severe weather and other conditions, has low network utilization rate, and has high power consumption because the communication module is in an open state for a long time; and many communication protocols are not suitable for user-defined information transmission in special scenes.
LoRa is a low-power-consumption long-distance wide area network wireless communication technology newly developed in recent years, mainly faces to the Internet of things (IoT) and the like, and can solve the network interconnection and communication among terminal devices. Compared with the prior local area network wireless technologies such as WiFi, ZigBee and Bluetooth and the prior wide area network wireless technologies such as 2G/3G/4G, the LoRa has the advantages of long transmission distance, low terminal power consumption, large capacity, long battery life and the like, and can realize longer-distance communication and lower power consumption to the maximum extent. The 4G transmission rate is fast, the quality is high, the transmission data volume is large, and the network coverage is wide.
Disclosure of Invention
In order to overcome the defect of centralized design of a traditional microcomputer type fault recorder system, the invention provides a LoRa and 4G communication system of a distributed power grid fault recorder. For similar modular system design, the invention can enable each subunit of the whole power grid fault recorder to be communicated with the remote server in real time, thereby realizing the cooperative work of human-computer interaction.
The technical scheme of the invention comprises the following steps:
a distributed power grid fault recorder's LoRa and 4G communication system includes:
the system comprises a plurality of sensing units, a collecting unit, a remote server and a monitoring unit, wherein the sensing units are respectively arranged on a three-phase high-voltage power transmission line to be monitored and used for acquiring three-phase working condition information of the high-voltage power transmission line in real time, keeping information interaction with the collecting unit through LoRa short-range communication according to a preset communication protocol, and uploading the information to the remote server through 4G remote communication according to the preset communication protocol if data are monitored to be abnormal or fault data are called by the remote server;
the collecting unit is installed on a telegraph pole close to the sensor unit nearby, and is used for collecting three-phase working condition information of the high-voltage transmission line of the sensor unit according to a preset communication protocol through LoRa short-range communication, uploading the three-phase working condition information to the remote server according to the preset communication protocol through 4G remote communication, and receiving an instruction of the remote server to perform related operation;
and the remote server is arranged in an office area and used for performing information interaction with the sensing unit and the collecting unit through 4G remote communication according to a preset communication protocol, collecting data or fault information sent by the sensing unit and/or the collecting unit and sending corresponding instruction configuration to the sensing unit and/or the collecting unit.
Further, the sensing unit includes:
the LoRa communication module is used for carrying out information interaction with the collection unit through LoRa short-range communication;
the 4G communication module is used for performing information interaction with a remote server by adopting 4G remote communication;
the fault information uploading module is used for judging the actual fault types of the power grid when monitoring that the alternating current data of the line are abnormal, wherein the actual fault types comprise permanent short-circuit faults, transient short-circuit faults and ground faults, starting the 4G communication module, summarizing the current recording data and corresponding time point records, packaging the current recording data and the corresponding time point records into data packets, and uploading the data packets to a remote server in a unified manner;
and the abnormal event reporting module is used for sending abnormal event information to the collecting unit through the LoRa communication module when monitoring that overload/overload, super-capacitance or battery low-voltage events occur per se according to the current and voltage data.
Further, the sensing unit further includes:
and the heartbeat packet sending module is used for sending heartbeat packet data to the collecting unit at regular time through the LoRa communication module so as to ensure that the information transmission time between the sensing unit and the collecting unit is normal.
Further, the collecting unit includes:
the LoRa communication module is used for carrying out information interaction with the sensing unit through LoRa short-range communication;
the 4G communication module is used for performing information interaction with a remote server by adopting 4G remote communication;
the sensing unit fault information recall and test module is used for receiving and analyzing a fault information recall and test instruction sent by the remote server, obtaining a time point of fault information and sending feedback information to the remote server; meanwhile, a fault information calling instruction is sent to the sensing unit through LoRa short-range communication, so that the sensing unit searches current wave recording data corresponding to a time point in an internal cache region or an external FLASH, the current wave recording data are packaged into data packets and then are uploaded to a remote server through 4G remote communication in a unified mode, and meanwhile feedback information is sent to the collecting unit;
the parameter modification module is used for receiving and analyzing a parameter modification instruction sent by the remote server, and if the parameter modification object is a collection unit, directly modifying the parameters of the collection unit and sending feedback information to the remote server; if the object of parameter modification is a sensor unit, sending a parameter modification instruction to the sensor unit through LoRa short-range communication, so that the sensor unit modifies and stores corresponding parameters, and simultaneously sending feedback information to the collecting unit;
the working condition information recalling and uploading module is used for sending working condition information recalling and testing instructions to the sensing units through LoRa short-range communication at intervals or under the condition that the remote server sends the working condition information recalling and testing instructions, summarizing the working condition information of all the sensing units, including power supply voltage, phase current and temperature information, packaging the working condition information into a data packet and uploading the data packet to the remote server through 4G remote communication in a unified manner; collecting working condition information of the collecting unit including the power supply voltage, packaging the working condition information into a data packet, and uploading the data packet to a remote server in a unified manner through 4G remote communication;
and the abnormal event reporting module is used for analyzing the corresponding information to determine the event type when receiving the abnormal event reporting information of the sensing unit, and simultaneously sending the analyzed abnormal event information to the remote server through 4G remote communication.
Further, the collecting unit further includes:
and the heartbeat packet sending module is used for sending a piece of heartbeat packet data to the remote server at regular time through the 4G communication module so as to ensure that the TCP/IP connection between the remote server and the collecting unit is not interrupted and the 4G network operates normally.
Further, the remote server includes:
the 4G communication module is used for carrying out information interaction with the collection unit and the sensing unit by adopting 4G remote communication;
the fault information recall and test module is used for sending a fault information recall and test instruction to the collection unit through 4G remote communication;
the parameter modification instruction sending module is used for sending a parameter modification instruction for modifying the parameters of the sensing unit and/or the collecting unit to the collecting unit through 4G remote communication;
the working condition information calling and measuring module is used for sending a working condition information calling and measuring instruction to the collecting unit through 4G remote communication to obtain the working condition information of all the sensing units and the collecting unit;
and the abnormal event receiving module is used for receiving the abnormal event report information which is analyzed and sent by the collecting unit and is about to the sensing unit through 4G remote communication.
Further, the remote server further comprises:
and the heartbeat packet receiving module is used for receiving heartbeat packet data sent by the collecting unit and the sensing unit.
Furthermore, two handshaking protocols are adopted for both LoRa short-range communication and 4G long-range communication, and the integrity and reliability of information transmission are guaranteed.
Further, all information of the basic format of the data frame of the communication protocol of the LoRa short-range communication and the 4G long-range communication adopts the data type of the unsigned single-byte integer variable, which includes:
a data header as a header portion of the data frame, indicating a type of the task information;
a command ID number for indicating a specific type of task information, i.e., a function of this frame data;
data, which is used for representing specific data used when executing the task and can comprise a plurality of data;
the check bit is used for summing data before the check bit and judging whether the received data frame has errors or not so as to ensure the accuracy of the data frame;
the data end, which is the end portion of the data frame, indicates the end of the data frame.
Further, the LoRa short-range communication is realized by adopting an ATK-LORA-01 wireless serial port module. The ATK-LORA-01 wireless serial port module realizes full-duplex serial data communication between the sensing unit and the collecting unit in a directional transmission mode. The sensor has the characteristics of small volume, high sensitivity, low power consumption and electricity saving support and the like, the transmission distance can reach 3000 meters, and the sensor can be any normally used LoRa module; the 4G remote communication is realized by adopting an ME909s-821 module. Each subunit of the power grid fault recorder establishes TCP/IP connection with a remote server through an ME909s-821 module to realize mutual data communication, and the device has the characteristics of high communication speed, flexible communication, good compatibility, low cost and the like.
Compared with the prior art, the communication system of the distributed power grid fault recorder provided by the invention has the advantages that according to a standard communication protocol, the distributed power grid fault recorder can stably operate through efficient and stable communication between each unit of the recorder and a remote server, networking exchange data and various command transmission tasks can be conveniently carried out, the cooperativity of man-machine interaction is greatly improved, the potential danger in line operation is favorably found, the operation safety of a power system is protected, and the operation reliability of an intelligent power grid is improved.
Drawings
Fig. 1 is an overall network structure diagram of a LoRa and 4G communication system of a distributed power grid fault recorder according to an embodiment of the present invention.
FIG. 2 is a block diagram of a sensing unit according to an embodiment of the present invention;
FIG. 3 is a block diagram of a collecting unit according to an embodiment of the present invention;
FIG. 4 is a block diagram of a remote server according to an embodiment of the present invention;
fig. 5 is a design flowchart of the LoRa and 4G communication system of the distributed power grid fault recorder according to the embodiment of the present invention.
Fig. 6 is a diagram of a data frame format of the communication protocol according to the embodiment of the present invention.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
As shown in fig. 1, a LoRa and 4G communication system of a distributed power grid fault recorder includes:
the system comprises a plurality of sensing units, a collecting unit, a remote server and a monitoring unit, wherein the sensing units are respectively arranged on a three-phase high-voltage power transmission line to be monitored and used for acquiring three-phase working condition information of the high-voltage power transmission line in real time, keeping information interaction with the collecting unit through LoRa short-range communication according to a preset communication protocol, and uploading the information to the remote server through 4G remote communication according to the preset communication protocol if data are monitored to be abnormal or fault data are called by the remote server;
the collecting unit is arranged on the telegraph pole close to the sensor unit nearby, is used for receiving and transmitting fault information and some instructions, is used for collecting the three-phase working condition information of the high-voltage transmission line of the sensor unit according to a preset communication protocol through LoRa short-range communication, uploads the three-phase working condition information to the remote server according to the preset communication protocol through 4G remote communication, and receives the instructions of the remote server for relevant operation;
and the remote server is arranged in an office area, is used for performing information interaction with the sensing unit and the collecting unit through 4G remote communication according to a preset communication protocol, is used for collecting data or fault information sent by the sensing unit and/or the collecting unit, and sends corresponding instruction configuration to the sensing unit and/or the collecting unit.
Specifically, as shown in fig. 2, the sensing unit includes:
the LoRa communication module is used for carrying out information interaction with the collection unit through LoRa short-range communication;
the 4G communication module is used for performing information interaction with a remote server by adopting 4G remote communication;
the fault information uploading module is used for judging the actual fault types of the power grid when monitoring that the alternating current data of the line are abnormal, wherein the actual fault types comprise permanent short-circuit faults, transient short-circuit faults and ground faults, starting the 4G communication module, summarizing the current recording data and corresponding time point records, packaging the current recording data and the corresponding time point records into data packets, and uploading the data packets to a remote server in a unified manner;
the abnormal event reporting module is used for sending abnormal event information to the collecting unit through the LoRa communication module when monitoring that overload/overload, super-capacitor or battery low-voltage events occur per se according to current and voltage data;
and the heartbeat packet sending module is used for sending heartbeat packet data to the collecting unit at regular time through the LoRa communication module so as to ensure that the information transmission time between the sensing unit and the collecting unit is normal.
Specifically, as shown in fig. 3, the aggregation unit includes:
the LoRa communication module is used for carrying out information interaction with the sensing unit through LoRa short-range communication;
the 4G communication module is used for performing information interaction with a remote server by adopting 4G remote communication;
the sensing unit fault information recall and test module is used for receiving and analyzing a fault information recall and test instruction sent by the remote server, obtaining a time point of fault information and sending feedback information to the remote server; meanwhile, a fault information calling instruction is sent to the sensing unit through LoRa short-range communication, so that the sensing unit searches current wave recording data corresponding to a time point in an internal cache region or an external FLASH, the current wave recording data are packaged into data packets and then are uploaded to a remote server through 4G remote communication in a unified mode, and meanwhile feedback information is sent to the collecting unit;
the parameter modification module is used for receiving and analyzing a parameter modification instruction sent by the remote server, and if the parameter modification object is a collection unit, directly modifying the parameters of the collection unit and sending feedback information to the remote server; if the object of parameter modification is a sensor unit, sending a parameter modification instruction to the sensor unit through LoRa short-range communication, so that the sensor unit modifies and stores corresponding parameters, and simultaneously sending feedback information to the collecting unit;
the working condition information recalling and uploading module is used for sending working condition information recalling and testing instructions to the sensing units through LoRa short-range communication at intervals or under the condition that the remote server sends the working condition information recalling and testing instructions, summarizing the working condition information of all the sensing units, including power supply voltage, phase current and temperature information, packaging the working condition information into a data packet and uploading the data packet to the remote server through 4G remote communication in a unified manner; collecting working condition information of the collecting unit including the power supply voltage, packaging the working condition information into a data packet, and uploading the data packet to a remote server in a unified manner through 4G remote communication;
the abnormal event reporting module is used for analyzing corresponding information to determine the event type when receiving the abnormal event reporting information of the sensing unit, and simultaneously sending the analyzed abnormal event information to the remote server through 4G remote communication;
and the heartbeat packet sending module is used for sending a piece of heartbeat packet data to the remote server at regular time through the 4G communication module so as to ensure that the TCP/IP connection between the remote server and the collecting unit is not interrupted and the 4G network operates normally.
Specifically, as shown in fig. 4, the remote server includes:
the 4G communication module is used for carrying out information interaction with the collection unit and the sensing unit by adopting 4G remote communication;
the fault information recall and test module is used for sending a fault information recall and test instruction to the collection unit through 4G remote communication;
the parameter modification instruction sending module is used for sending a parameter modification instruction for modifying the parameters of the sensing unit and/or the collecting unit to the collecting unit through 4G remote communication;
the working condition information calling and measuring module is used for sending a working condition information calling and measuring instruction to the collecting unit through 4G remote communication to obtain the working condition information of all the sensing units and the collecting unit;
the abnormal event receiving module is used for receiving the abnormal event report information about the sensing unit, which is analyzed and sent by the collecting unit, through 4G remote communication;
and the heartbeat packet receiving module is used for receiving heartbeat packet data sent by the collecting unit and the sensing unit.
As one of possible embodiments, the LoRa short-range communication and the 4G long-range communication both use a two-way handshake protocol, and all information of a data frame basic format of the communication protocol use a data type of an unsigned single-byte integer variable, as shown in fig. 6, including:
a data header as a header portion of the data frame, indicating a type of the task information;
a command ID number for indicating a specific type of task information, i.e., a function of this frame data;
data, which is used for representing specific data used when executing the task and can comprise a plurality of data;
the check bit is used for summing data before the check bit and judging whether the received data frame has errors or not so as to ensure the accuracy of the data frame;
the data end, which is the end portion of the data frame, indicates the end of the data frame.
As one of possible embodiments, the LoRa short-range communication and the 4G long-range communication both use a two-way handshake protocol, and a data frame basic format of the communication protocol includes:
a data header as a header portion of the data frame, indicating a type of the task information;
a command ID number for indicating a specific type of task information, i.e., a function of this frame data;
data, which is used for representing specific data used when executing the task and can comprise a plurality of data;
the check bit is used for summing data before the check bit and judging whether the received data frame has errors or not so as to ensure the accuracy of the data frame;
the data end, which is the end portion of the data frame, indicates the end of the data frame.
Specifically, all information of the basic format of the data frame adopts the data type of an unsigned single byte integer variable.
The remote server, the collecting unit and the sensing unit perform tasks such as networking data exchange and various command transmission through the same communication protocol. The communication functions of different subunits are correspondingly different, and the complete data frame format can be customized by a user.
The sensing unit and the aggregation unit in the above embodiment support both LoRa communication and 4G communication, and the far-exceeding server only needs to support 4G communication service. The collecting unit constantly carries out 4G remote communication with the remote server, the sensing unit constantly carries out LoRa short-range communication with the collecting unit, and the sensing unit only carries out 4G remote communication with the remote server when needing to directly upload the original collected data of three-phase current fault. The collecting unit is used as an information transfer station, so that the sensing unit can conveniently carry out data communication with the remote server through the collecting unit, the time for starting 4G remote communication by the sensing unit is reduced, and the power consumption of the sensing unit is reduced.
As one of feasible embodiments, the LoRa short-range communication is realized by adopting an ATK-LORA-01 wireless serial port module. The ATK-LORA-01 wireless serial port module realizes full-duplex serial data communication between the sensing unit and the collecting unit in a directional transmission mode. The sensor has the characteristics of small volume, high sensitivity, low power consumption and power saving support and the like, the transmission distance can reach 3000 meters, and any normally-used LoRa module can be used.
As one of the possible embodiments, the 4G remote communication is realized by adopting an ME909s-821 module. Each subunit of the power grid fault recorder establishes TCP/IP connection with a remote server through an ME909s-821 module to realize mutual data communication, and the device has the characteristics of high communication speed, flexible communication, good compatibility, low cost and the like.
As shown in fig. 5, the design process of the communication system of the above embodiment includes:
step 1, constructing an integral hardware platform of a communication system of a distributed power grid fault oscillograph, wherein the integral hardware platform is used as a lower computer and comprises one or more sensing units and a collecting unit; the sensor units are respectively installed on a three-phase high-voltage transmission line to be monitored, and the collecting unit is installed nearby a telegraph pole close to the sensor units.
And 2, according to the system integral hardware platform in the step 1, in combination with task requirements of the power grid fault recorder and the remote server, establishing communication protocols between each subunit of the fault recorder and the remote server, wherein the communication protocols comprise LoRa short-range communication and 4G remote communication. The complete data frame format can be customized by users for different communication tasks and different subunits.
And 3, manufacturing upper computer software of the remote server according to the communication protocol in the step 2, wherein the upper computer software comprises functions of fault information recall, unit parameter modification and the like, and a good human-computer interaction interface is formed.
And 4, gradually debugging the task of the upper computer by operating the upper computer software of the remote server, testing the real-time performance of communication between the fault recorder and the remote server, and finally realizing large-range and multi-node intelligent data monitoring of the power grid.
The LoRa and 4G communication system of the distributed power grid fault oscillograph provided by the above embodiment includes a sensor unit, a collecting unit and a server, wherein the sensor unit is responsible for collecting three-phase current of a high-voltage transmission line in real time, the collecting unit is responsible for receiving and transmitting fault information and forwarding some instructions, and the background server is mainly responsible for collecting data or fault information and configuring instructions. Because the physical distance between the sensor and the collection unit is short and the information interaction is frequent, the characteristics of the LoRa short-distance wireless communication technology can be fully utilized; the sensor unit and the collection unit are distributed in the field, the remote server is located in an office area, the physical distance is long, the requirement on the data transmission quality is high, and the 4G network can be used for carrying out efficient and rapid real-time communication and management between the remote server and other modules.
It can be seen that, in order to realize stable information interaction and data transmission among the modules, the invention uses the loRa and 4G composite communication network, thereby realizing real-time fault detection and data transmission, and simultaneously ensuring necessary interpersonal interaction, which is beneficial to timely discovering potential danger in line operation, protecting the operation safety of a power system and further improving the operation reliability of the smart grid.
The above examples of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (8)
1. The utility model provides a distributed power grid fault oscillograph's LoRa and 4G communication system which characterized in that includes:
the system comprises a plurality of sensing units, a collecting unit, a remote server and a monitoring unit, wherein the sensing units are respectively arranged on a three-phase high-voltage power transmission line to be monitored and used for acquiring three-phase working condition information of the high-voltage power transmission line in real time, keeping information interaction with the collecting unit through LoRa short-range communication according to a preset communication protocol, and uploading the information to the remote server through 4G remote communication according to the preset communication protocol if data are monitored to be abnormal or fault data are called by the remote server;
the collecting unit is installed on a telegraph pole close to the sensor unit nearby, and is used for collecting three-phase working condition information of the high-voltage transmission line of the sensor unit according to a preset communication protocol through LoRa short-range communication, uploading the three-phase working condition information to the remote server according to the preset communication protocol through 4G remote communication, and receiving an instruction of the remote server to perform related operation;
the remote server is arranged in an office area and used for performing information interaction with the sensing unit and the collecting unit through 4G remote communication according to a preset communication protocol, collecting data or fault information sent by the sensing unit and/or the collecting unit and sending corresponding instruction configuration to the sensing unit and/or the collecting unit;
the sensing unit includes:
the LoRa communication module is used for carrying out information interaction with the collection unit through LoRa short-range communication;
the 4G communication module is used for performing information interaction with a remote server by adopting 4G remote communication;
the fault information uploading module is used for judging the actual fault types of the power grid when monitoring that the alternating current data of the line are abnormal, wherein the actual fault types comprise permanent short-circuit faults, transient short-circuit faults and ground faults, starting the 4G communication module, summarizing the current recording data and corresponding time point records, packaging the current recording data and the corresponding time point records into data packets, and uploading the data packets to a remote server in a unified manner;
the abnormal event reporting module is used for sending abnormal event information to the collecting unit through the LoRa communication module when monitoring that overload/overload, super-capacitor or battery low-voltage events occur per se according to current and voltage data;
the collection unit comprises:
the LoRa communication module is used for carrying out information interaction with the sensing unit through LoRa short-range communication;
the 4G communication module is used for performing information interaction with a remote server by adopting 4G remote communication;
the sensing unit fault information recall and test module is used for receiving and analyzing a fault information recall and test instruction sent by the remote server, obtaining a time point of fault information and sending feedback information to the remote server; meanwhile, a fault information calling instruction is sent to the sensing unit through LoRa short-range communication, so that the sensing unit searches current wave recording data corresponding to a time point in an internal cache region or an external FLASH, the current wave recording data are packaged into data packets and then are uploaded to a remote server through 4G remote communication in a unified mode, and meanwhile feedback information is sent to the collecting unit;
the parameter modification module is used for receiving and analyzing a parameter modification instruction sent by the remote server, and if the parameter modification object is a collection unit, directly modifying the parameters of the collection unit and sending feedback information to the remote server; if the object of parameter modification is a sensor unit, sending a parameter modification instruction to the sensor unit through LoRa short-range communication, so that the sensor unit modifies and stores corresponding parameters, and simultaneously sending feedback information to the collecting unit;
the working condition information recalling and uploading module is used for sending working condition information recalling and testing instructions to the sensing units through LoRa short-range communication at intervals or under the condition that the remote server sends the working condition information recalling and testing instructions, summarizing the working condition information of all the sensing units, including power supply voltage, phase current and temperature information, packaging the working condition information into a data packet and uploading the data packet to the remote server through 4G remote communication in a unified manner; collecting working condition information of the collecting unit including the power supply voltage, packaging the working condition information into a data packet, and uploading the data packet to a remote server in a unified manner through 4G remote communication;
and the abnormal event reporting module is used for analyzing the corresponding information to determine the event type when receiving the abnormal event reporting information of the sensing unit, and simultaneously sending the analyzed abnormal event information to the remote server through 4G remote communication.
2. The LoRa and 4G communication system of the distributed grid fault recorder as claimed in claim 1, wherein the sensing unit further comprises:
and the heartbeat packet sending module is used for sending heartbeat packet data to the collecting unit at regular time through the LoRa communication module so as to ensure that the information transmission time between the sensing unit and the collecting unit is normal.
3. The LoRa and 4G communication system of the distributed grid fault recorder of claim 2, wherein the aggregation unit further comprises:
and the heartbeat packet sending module is used for sending a piece of heartbeat packet data to the remote server at regular time through the 4G communication module so as to ensure that the TCP/IP connection between the remote server and the collecting unit is not interrupted and the 4G network operates normally.
4. The LoRa and 4G communication system of the distributed grid fault recorder as claimed in claim 1, wherein the remote server comprises:
the 4G communication module is used for carrying out information interaction with the collection unit and the sensing unit by adopting 4G remote communication;
the fault information recall and test module is used for sending a fault information recall and test instruction to the collection unit through 4G remote communication;
the parameter modification instruction sending module is used for sending a parameter modification instruction for modifying the parameters of the sensing unit and/or the collecting unit to the collecting unit through 4G remote communication;
the working condition information calling and measuring module is used for sending a working condition information calling and measuring instruction to the collecting unit through 4G remote communication to obtain the working condition information of all the sensing units and the collecting unit;
and the abnormal event receiving module is used for receiving the abnormal event report information which is analyzed and sent by the collecting unit and is about to the sensing unit through 4G remote communication.
5. The LoRa and 4G communication system of a distributed grid fault recorder as claimed in claim 4, wherein said remote server further comprises:
and the heartbeat packet receiving module is used for receiving heartbeat packet data sent by the collecting unit and the sensing unit.
6. The LoRa and 4G communication system of distributed power grid fault recorder of claim 1, characterized in that, two-way handshake protocol is adopted in LoRa short-range communication and 4G long-range communication.
7. The LoRa and 4G communication system of the distributed grid fault recorder as claimed in claim 1, wherein all information of the basic format of the data frame of the communication protocol of the LoRa short-range communication and the 4G long-range communication adopts a data type of an unsigned single-byte integer variable, comprising:
a data header as a header portion of the data frame, indicating a type of the task information;
a command ID number for indicating a specific type of task information, i.e., a function of this frame data;
data, which is used for representing specific data used when executing the task and can comprise a plurality of data;
the check bit is used for summing data before the check bit and judging whether the received data frame has errors or not so as to ensure the accuracy of the data frame;
the data end, which is the end portion of the data frame, indicates the end of the data frame.
8. The LoRa and 4G communication system of the distributed power grid fault recorder of claim 1, characterized in that the LoRa short-range communication is realized by an ATK-LORA-01 wireless serial port module; the 4G remote communication is realized by adopting an ME909s-821 module.
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| CN110972118B (en) * | 2019-11-28 | 2020-11-10 | 西安交通大学 | Duplex-mode social interaction relationship data acquisition platform and method |
| CN111741095B (en) * | 2020-06-15 | 2023-03-24 | 浙江巨磁智能技术有限公司 | Electric energy meter micro-grid networking mode with complementary sharing of remote communication |
| CN112702717B (en) * | 2020-11-06 | 2022-07-26 | 国网浙江省电力有限公司温州供电公司 | Communication method based on LoRa and NB-IoT fault indicator communication system |
| CN114793329A (en) * | 2021-01-26 | 2022-07-26 | 国网山西省电力公司信息通信分公司 | Power grid environment monitoring system and method based on 5G LoRa fixed gateway design |
| CN113049991B (en) * | 2021-03-24 | 2022-11-29 | 国网山东省电力公司泰安供电公司 | Distribution network line cable middle head running state monitoring system |
| CN113866566A (en) * | 2021-10-26 | 2021-12-31 | 广东电网有限责任公司 | Distribution lines monitoring system based on fault indicator and loRa communication |
| CN115103389B (en) * | 2022-06-15 | 2023-09-22 | 国网山东省电力公司武城县供电公司 | Fault indication method for power distribution network |
| CN116404566B (en) * | 2022-12-02 | 2024-02-06 | 国网河北省电力有限公司石家庄市栾城区供电分公司 | Power distribution line inspection platform and inspection method |
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