A SF6 gas remote online monitoring system, method and electronic equipment

Abstract

The present invention discloses a remote online monitoring system, method, and electronic device for SF6 gas. The system includes an SF6 gas density relay, a LoRa anti-interference module and a LoRa forward error correction (FEC) coding module. The LoRa anti-interference module is used to perform spread spectrum modulation processing on received signals based on orthogonal frequency division multiple access (OFDMA) and quadrature amplitude modulation (QAM) techniques, and the LoRa forward error correction (FEC) coding module is used to encode, decode, and perform code correction on monitored data using a convolutional code. Furthermore, the system includes a communication module and an Internet of Things (IoT) management platform. The communication module is used to connect data from the SF6 gas density relay to the IoT management platform. The present invention can continuously monitor SF6 status parameters, promptly capture early warning signs of failure in substation GIS equipment, and monitor and remotely transmit SF6 gas density in substations with strong electromagnetic interference, thereby ensuring the safe and reliable operation of power supply equipment.

Description

Technical Field

[0001] The present invention belongs to the technical field of SF6 gas monitoring, and in particular relates to a SF6 gas remote online monitoring system, method and electronic equipment. Background Art

[0002] With the rapid development of sensor technology, computer and communication technology, and control technology, their application areas are constantly expanding. Their gradual integration with traditional power grids has given rise to the concept of smart grids. Smart grids are the future direction of power grid development, and smart substations, as the control center for power dispatch, are a crucial component of smart grids. The construction of smart substations is a key component of building a modern equipment management system, a crucial measure to enhance the intelligence level of equipment and the quality and efficiency of substation operation and maintenance, and a crucial foundation for the digital transformation of substations.

[0003] Traditional SF6 gas density relay data acquisition requires manual, comprehensive equipment inspections. The increased number of devices leads to increased workload and inspection errors. Currently, in the process of promoting the construction of smart substations, the design and operation of SF6 digital remote meters are far from mature. From the perspective of operational performance, manual on-site meter reading is a tedious, inefficient, and repetitive task. Digital remote transmission will enable the digital collection and remote transmission of instrument data from all main equipment in the station, significantly reducing the daily operational workload, effectively reducing the workload of operational personnel, and significantly improving operational performance. From the perspective of lean operational maintenance, it can achieve continuous monitoring of equipment, realize data trend perception and sudden change monitoring, facilitate lean equipment operation and maintenance, and more effectively ensure equipment safety.

[0004] For example, patent CN115855171A provides an online monitoring and alarm system for gas in SF6 electrical equipment and an implementation method, including a monitoring host, which is connected to several gas transmitters, several SF6 split-screen intelligent control terminals, several sensing alarm terminals and a monitoring center; the monitoring host and the gas transmitter communicate using a 485 communication method, and the monitoring host communicates with the SF6 split-screen intelligent control terminal and the sensing alarm terminal through a 485 communication method and a LoRa wireless method; the monitoring host transmits data to the monitoring center through a 485 bus method, a LoRa wireless method, and a CAN method, and the monitoring center can also control the monitoring host through a 485 bus method, a LoRa wireless method, and a CAN method.

[0005] For example, patent CN114945113A provides a monitoring method, system and device for SF6 gas-insulated equipment, including: if the alarm time of the current work to be run meets the preset matching requirements with the current time, waking itself up and controlling the sensing and measuring device or wireless remote transmission module required for the current work to be run to start; wherein the work to be run is the monitoring work for SF6 gas-insulated equipment; if it is detected that the current work to be run has ended, controlling the sensing and measuring device or wireless remote transmission module required for the current work to be run to shut down; obtaining the timestamp of the next work to be run, converting the timestamp into the alarm time of the next work to be run, and controlling itself to enter deep sleep.

[0006] As in the prior art described in the above patent, although the substation is equipped with an SF6 gas density online monitoring system, due to the complex noise in the electromagnetic environment where the equipment is located, it is easy for the sensor part to be damaged or the SF6 gas density data obtained through the online monitoring system is inaccurate, and the operation and maintenance costs are high.

[0007] Therefore, how to design SF6 gas remote online monitoring technology to realize the monitoring and remote transmission of SF6 gas density in substations with strong electromagnetic interference is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0008] To address the deficiencies in the aforementioned prior art, the present invention provides a remote online monitoring system, method, and electronic device for SF6 gas. The system comprises an SF6 gas density relay, a LoRa anti-interference module, and a LoRa forward error correction (FEC) coding module. The LoRa anti-interference module is used to perform spread spectrum modulation processing on received signals based on orthogonal frequency division multiple access (OFDMA) and quadrature amplitude modulation (QAM) techniques, and the LoRa forward error correction (FEC) coding module is used to encode, decode, and perform code correction on the monitored data using a convolutional code. Furthermore, the system comprises a communication module and an Internet of Things (IoT) management platform. The communication module is used to connect data from the SF6 gas density relay to the IoT management platform. The present invention can continuously monitor SF6 status parameters, promptly capture early warning signs of failure in substation GIS equipment, and monitor and remotely transmit SF6 gas density in substations with strong electromagnetic interference, thereby ensuring the safe and reliable operation of power supply equipment.

[0009] In a first aspect, the present invention provides a SF6 gas remote online monitoring system, comprising:

[0010] The SF6 gas density relay includes a LoRa anti-interference module and a LoRa forward error correction coding module. The LoRa anti-interference module is used to perform spread spectrum modulation processing on the received signal based on orthogonal frequency division multiple access technology and orthogonal amplitude modulation technology. The LoRa forward error correction coding module is used to encode, decode and correct the monitored data using a convolutional code.

[0011] Communication module and Internet of Things management platform, the communication module is used to connect the data of the SF6 gas density relay to the Internet of Things management platform.

[0012] Furthermore, it also includes: an inspection prompt module, which is used to prompt the SF6 gas density relay to inspect the GIS equipment in the substation on the set inspection date.

[0013] Furthermore, it also includes: an inspection operation video monitoring module for monitoring GIS equipment in the substation.

[0014] Furthermore, it also includes a temperature measurement module, an oxygen measurement module, a pressure measurement module and a heat dissipation module respectively connected to the communication module.

[0015] Furthermore, the communication module is used to upload the parameter information and alarm information of the SF6 gas density relay and the parameter information of the temperature measurement module, oxygen measurement module, pressure measurement module and heat dissipation module to the Internet of Things management platform through the same communication protocol.

[0016] Furthermore, the LoRa forward error correction coding module includes a LoRa channel encoder and a LoRa signal decoder;

[0017] The LoRa forward error correction coding module is used to encode, decode and correct the monitored data using convolutional code, specifically including:

[0018] Establish a digital interface between the LoRa channel encoder and the LoRa signal decoder;

[0019] The LoRa channel encoder encodes the detected data using a convolutional code and transmits the encoded data to the LoRa signal decoder through a digital interface;

[0020] The LoRa signal decoder determines the transmission sequence of the encoded data according to the preset transmission conditions, and corrects the erroneous data after decoding and checking the encoded data;

[0021] The LoRa signal decoder sends the corrected data according to the determined sending sequence.

[0022] Furthermore, the LoRa channel encoder includes several register units;

[0023] The LoRa forward error correction coding module is used to encode, decode and correct the monitored data using convolutional code, specifically including:

[0024] Decomposing the monitored data into information bits corresponding to the number of register units;

[0025] The decomposed information bits are stored in each register unit respectively:

[0026] Performing an algebraic operation on the information bits in each register unit and outputting the operation result as an encoding result; wherein the encoding result includes a plurality of check bit sequences and a data bit sequence;

[0027] The LoRa signal decoder receives the encoding result of the LoRa channel encoder;

[0028] Comparing the multiple check bit sequences and data bit sequences in the received coding result with all the preset transmission sequences, and providing the preset transmission sequence having the smallest code distance with the multiple check bit sequences and data bit sequences in the coding result;

[0029] Decoding the data bit sequence in the received encoding result;

[0030] Perform algebraic calculations on all check bit sequences and compare them with the information bits in the register unit, and correct any discrepancies.

[0031] The corrected information bits are resent to the encoder for further algebraic operation and then sent to the communication module through a predetermined sending sequence.

[0032] Furthermore, the received signal is subjected to spread spectrum modulation processing based on orthogonal frequency division multiple access technology and orthogonal amplitude modulation technology, specifically including:

[0033] Preset different subcarrier sets for each communication module;

[0034] Send test information to the IoT management platform through various communication modules and receive feedback information returned from the IoT management platform;

[0035] reallocating subcarrier sets to all communication modules based on the feedback information;

[0036] The communication module modulates the received information bits to generate real and imaginary parts of the signal bits;

[0037] The real and imaginary parts are linearly combined to form a complex signal;

[0038] The complex signal is modulated to obtain a quadrature amplitude modulated signal.

[0039] In a second aspect, the present invention further provides a method for remote online monitoring of SF6 gas, which uses the above-mentioned remote online monitoring system for SF6 gas and specifically includes the following steps:

[0040] Install the SF6 gas density relay in the substation where SF6 electrical equipment is installed;

[0041] The LoRa anti-interference module performs spread spectrum modulation processing on the received signal based on orthogonal frequency division multiple access technology and orthogonal amplitude modulation technology. The LoRa forward error correction coding module uses convolutional code encoding to encode, decode and correct the monitored data.

[0042] The communication module connects the data of the SF6 gas density relay to the Internet of Things management platform.

[0043] In a third aspect, the present invention further provides an electronic device, comprising:

[0044] Memory, for storing computer programs;

[0045] a processor for executing a computer program;

[0046] The computer program is used to execute the above-mentioned SF6 gas remote online monitoring method.

[0047] The present invention provides a SF6 gas remote online monitoring system, method and electronic equipment, which have at least the following beneficial effects:

[0048] (1) Compared with the existing technology, the SF6 gas remote online monitoring system provided by the present invention integrates sensing technology, data collection technology, and reliable communication technology. By integrating the traditional density mechanical meter and wireless remote transmission into a compact integrated design, it can be modified or directly installed in a limited space.

[0049] (2) It can continuously monitor SF6 status parameters and timely capture the precursor information of early failure of substation GIS equipment. It can monitor and remotely transmit SF6 gas density in substations with strong electromagnetic interference, thereby ensuring the safe and reliable operation of power supply equipment.

[0050] (3) The LoRa forward error correction coding module divides the coded bit sequence into multiple check bit sequences and a given data bit sequence. When receiving information, the received data bit sequence is first decoded and then the received check bit sequence is calculated. If a difference occurs, it means that the data bit sequence is wrong. At this time, the erroneous data can be further corrected.

[0051] (4) Each communication module uses a different set of subcarriers. Based on the feedback information of the channel conditions, adaptive user-to-subcarrier allocation can be achieved, further improving the robustness of the system communication. During the transmission process, the digital signal transmitted by the communication module is divided into two parts and modulated separately. One part represents the real part of the signal, and the other part represents the imaginary part of the signal. By linearly combining these two parts to form a complex signal, the signal is modulated to obtain an orthogonal amplitude modulated signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 This is an architecture diagram of a SF6 gas remote online monitoring system provided by the present invention;

[0053] Figure 2 This is a functional diagram of the LoRa forward error correction coding module provided by the present invention;

[0054] Figure 3 This is a functional diagram of the LoRa anti-interference module provided by the present invention;

[0055] Figure 4 A flow chart of a method for remote online monitoring of SF6 gas provided by the present invention;

[0056] Figure 5 This is a structural diagram of an electronic device provided by the present invention. DETAILED DESCRIPTION

[0057] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0058] The terms used in the embodiments of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The singular forms "a," "an," "the," and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, and unless the context clearly indicates otherwise, "a plurality" generally includes at least two.

[0059] It should also be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product or device comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such product or device. In the absence of further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the product or device comprising the element.

[0060] SF6 gas density relays are used to detect changes in SF6 gas density in high-voltage electrical equipment. They are widely used in single equipment such as SF6 circuit breakers, as well as in combined electrical equipment such as gas-insulated enclosed combination electrical appliances and plug-in switch systems. The accurate acquisition of density data directly affects the safe and stable operation of high-voltage electrical equipment.

[0061] Traditional SF6 gas density relays require comprehensive manual inspections of the equipment, increasing the workload and errors. Some substations are equipped with online SF6 gas density monitoring systems, but the complex electromagnetic environment in which these systems operate can easily damage the sensors and produce inaccurate SF6 gas density data.

[0062] Currently, the most widely used type is still the mechanical SF6 gas density meter. This type of density meter has high reliability and basically guaranteed measurement accuracy. However, the measured pressure data cannot be transmitted, and centralized display and management of data cannot be achieved, which can no longer meet the needs of substation automation management.

[0063] The previous "planned maintenance" method has disadvantages such as long cycle, easy omissions, time-consuming and labor-intensive, high risk, and low accuracy. The "online monitoring" method can effectively solve the above problems.

[0064] Therefore, in order to meet the requirements of smart substations for substation online monitoring systems, remote monitoring of SF6 gas density must be achieved, which helps to make various online status monitoring sensors interchangeable. With a unified data exchange standard, the same monitoring module can be shared, which greatly facilitates subsequent maintenance and greatly reduces maintenance costs.

[0065] Currently, there are wireless SF6 density transmitters based on ZigBee, but they do not adopt a unified information model or a unified communication service interface (information interaction model), and do not involve data analysis between GIS equipment and meters, or between different meters. Now it is necessary to integrate the density meter for an integrated design, and an integrated sulfur hexafluoride digital meter can be launched according to actual needs. Figure 1 As shown, the embodiment of the present application provides a SF6 gas remote online monitoring system, comprising:

[0066] SF6 gas density relay, the SF6 gas density relay includes a LoRa anti-interference module and a LoRa forward error correction coding module, wherein the LoRa forward error correction coding module uses a convolutional code encoding method for encoding and decoding. The LoRa forward error correction coding module is used to encode and send LoRa information using the convolutional code encoding method, and transmit the LoRa information encoding through the LoRa channel encoder; the LoRa forward error correction coding module is also used for LoRa information encoding correction, and receives the corrected code transmitted from the LoRa channel encoder through the LoRa decoder;

[0067] The LoRa anti-interference module is used to perform spread spectrum modulation processing on the received signal based on orthogonal frequency division multiple access technology and orthogonal amplitude modulation technology to resist the influence caused by crystal oscillator drift and Doppler frequency shift;

[0068] Communication module and Internet of Things management platform, the communication module is used to connect the data of the SF6 gas density relay to the Internet of Things management platform.

[0069] Traditional SF6 gas density relays consist of a density meter with alarm and lockout contacts, or a combination of a density meter and relay, providing intuitive monitoring of SF6 gas pressure. When the SF6 gas density within high-voltage electrical equipment drops below the pressure alarm value, the SF6 density relay issues an alarm signal; when the SF6 gas density within high-voltage electrical equipment drops below the pressure lockout value, the SF6 density relay issues a lockout signal. Utilizing the pressure measurement function included with SF6 digital density meters, gas pressure within the equipment can be monitored at all times, providing a dual-insurance solution and preventing accidents caused by inaccurate pressure gauges within the equipment. However, the separation of the mechanical and electronic components of an SF6 density meter results in a redundant sealing mechanism, increasing the likelihood of sealing failures and compromising equipment reliability. Furthermore, because pressurized SF6 gas requires sophisticated sealing techniques, the numerous disassembly steps associated with the separate structure can easily damage the sealing surfaces of the SF6 flanges, potentially leading to SF6 gas leakage and posing a significant safety hazard.

[0070] During on-site intelligent transformation, the separate installation method occupies a large installation space, resulting in inconvenience in the installation and removal of traditional SF6 mechanical meters and remote sensors due to insufficient space in many places. The integrated SF6 digital density remote meter has a compact structure, is not prone to interference, and is easy to install on-site, bringing convenience to operation and greatly improving work efficiency, thereby ensuring the normal operation of power supply equipment.

[0071] Compared with the existing technology, the SF6 gas remote online monitoring system provided by the present invention integrates sensing technology, data collection technology, and reliable communication technology. By compactly integrating the traditional density mechanical meter and wireless remote transmission into one design, it can be modified or directly installed in a limited space.

[0072] Currently, SF6 density information for high-voltage electrical equipment in most substations requires traditional manual inspections and cannot be directly obtained in the main control room. Due to the complex electromagnetic environment in which these components operate, data collection is subject to errors. In severe cases, this can lead to misjudgments or even failures without receiving alarms, significantly impacting the safe and stable operation of the power grid.

[0073] Traditional wired remote SF6 meters were designed without consideration for signal distortion caused by long-distance common-mode interference, as well as electromagnetic and electrostatic interference at substations. These issues can severely impair communication between the receiving device and the SF6 remote meter, or even damage the receiving device itself. Wired digital SF6 remote density meters are susceptible to complex electromagnetic environments, including lightning strikes, surges, VFTO, and electrostatic discharge. Therefore, appropriate measures must be taken to mitigate the effects of conducted and radiated coupling.

[0074] To address the problems of existing SF6 gas density relays, particularly the inability to accurately collect gas density data in complex electromagnetic environments, the present invention provides an SF6 gas remote online monitoring system that can continuously monitor SF6 status parameters, promptly capture early warning signs of GIS equipment failures, and reliably monitor and remotely transmit SF6 gas density wirelessly in substations with strong electromagnetic interference, thereby ensuring the safe and reliable operation of power supply equipment. Compared with existing technologies, this system saves a large amount of workload and expenses for inspection workers, greatly reduces the subsequent maintenance costs of the product, improves economic benefits, and has significant technical effects. In addition, the present application also relates to a SF6 gas remote online monitoring method and electronic equipment, which also have the above-mentioned beneficial effects.

[0075] Specifically, in an embodiment of the present invention, it further includes: an inspection prompting module, which is used to prompt the SF6 gas density relay to inspect the GIS equipment in the substation on a set inspection date.

[0076] Specifically, in an embodiment of the present invention, the communication module is used to upload the parameter information and alarm information of the SF6 gas density relay and the parameter information of the temperature measurement module, oxygen measurement module, pressure measurement module and heat dissipation module to the Internet of Things management platform through the same communication protocol.

[0077] Traditional SF6 density remote meter communication protocols use a manufacturer-defined protocol to describe data, making interoperability between SF6 density digital meters from different manufacturers and the master station difficult and necessitating heavy installation and debugging efforts. A unified device model offers several benefits: Standardizing devices through the definition of a device model effectively reduces the development workload for accessing multi-dimensional sensing devices. Furthermore, this standardization allows for the participation of multiple manufacturers, making unified device access simpler and more efficient, effectively resolving the challenge of unified access for multi-vendor, multi-type, and multi-protocol sensing devices. Standardizing data descriptions through the definition of a device model effectively simplifies the integration of multi-dimensional sensing data, improves data utilization efficiency, and effectively addresses the difficulty of integrating multi-dimensional sensing data. The definition of a device model eliminates the strong coupling between applications and devices, simplifying application development without requiring changes to sensing devices, effectively resolving the issue of high coupling between applications and devices.

[0078] Wireless sensor networks are an important component of the perception layer of the Internet of Things. With the development of micro-electromechanical systems and the emergence of various low-power digital devices, small-sized, low-power, and low-cost sensor nodes have become possible. These nodes, combined with various sensors, form a wireless sensor network, which enables the SF6 digital density telemeter data transmission process to have a unified Internet of Things model and communication protocol, thereby enabling the SF6 digital density telemeter data to be connected to a unified Internet of Things management platform. This is of great reference significance for realizing the sharing and linkage of data from the main equipment on the transmission and transformation side, and improving the ability to perceive the operating status of the main equipment on the transmission and transformation side.

[0079] Specifically, in an embodiment of the present invention, it further includes: a temperature measurement module, an oxygen measurement module, a pressure measurement module connected to the communication module; and a heat dissipation module.

[0080] Specifically, in an embodiment of the present invention, it further includes: an inspection operation video monitoring module connected to the communication module.

[0081] Specifically, such as Figure 2-3 As shown, in an embodiment of the present invention, the LoRa forward error correction coding module includes a LoRa channel encoder and a LoRa signal decoder; the LoRa anti-interference module is used to perform spread spectrum modulation processing on the received signal based on orthogonal frequency division multiple access technology and orthogonal amplitude modulation technology, and the LoRa forward error correction coding module is used to encode, decode and correct the monitored data using a convolutional code encoding method, specifically including:

[0082] Establish a digital interface between the LoRa channel encoder and the LoRa signal decoder;

[0083] The LoRa channel encoder encodes the detected data using a convolutional code and transmits the encoded data to the LoRa signal decoder through a digital interface;

[0084] The LoRa signal decoder determines the transmission sequence of the encoded data according to the preset transmission conditions, and corrects the erroneous data after decoding and checking the encoded data;

[0085] The LoRa signal decoder sends the corrected data according to the determined sending sequence.

[0086] The LoRa channel encoder includes several register units;

[0087] The LoRa forward error correction coding module is used to encode, decode and correct the monitored data using convolutional code, specifically including:

[0088] Decomposing the monitored data into information bits corresponding to the number of register units;

[0089] The decomposed information bits are stored in each register unit respectively:

[0090] Performing an algebraic operation on the information bits in each register unit and outputting the operation result as an encoding result; wherein the encoding result includes a plurality of check bit sequences and a data bit sequence;

[0091] The LoRa signal decoder receives the encoding result of the LoRa channel encoder;

[0092] Comparing the multiple check bit sequences and data bit sequences in the received coding result with all the preset transmission sequences, and providing the preset transmission sequence having the smallest code distance with the multiple check bit sequences and data bit sequences in the coding result;

[0093] Decoding the data bit sequence in the received encoding result;

[0094] Perform algebraic calculations on all check bit sequences and compare them with the information bits in the register unit, and correct any discrepancies.

[0095] The corrected information bits are resent to the encoder for further algebraic operation and then sent to the communication module through a predetermined sending sequence.

[0096] The received signal is subjected to spread spectrum modulation processing based on orthogonal frequency division multiple access technology and orthogonal amplitude modulation technology, specifically including:

[0097] Preset different subcarrier sets for each communication module;

[0098] Send test information to the IoT management platform through various communication modules and receive feedback information returned from the IoT management platform;

[0099] reallocating subcarrier sets to all communication modules based on the feedback information;

[0100] The communication module modulates the received information bits to generate real and imaginary parts of the signal bits;

[0101] The real and imaginary parts are linearly combined to form a complex signal;

[0102] The complex signal is modulated to obtain a quadrature amplitude modulated signal.

[0103] LoRa is a long-distance radio technology based on low-power wide-area networks. Compared with traditional transmission methods, LoRa has the advantages of long transmission distance, low power consumption and strong anti-interference ability.

[0104] LoRa technology is a leading low-power, long-distance wireless communication technology. It uses linear frequency modulation (LFM) spread spectrum modulation to transmit information using sinusoidal pulse signals whose frequency varies linearly across the entire bandwidth. A linear increase in frequency within the bandwidth represents a "1" signal, while a decrease in frequency within the bandwidth represents a "0" signal. Spread spectrum modulation technology can be configured to use different spreading sequences, resulting in orthogonal signals. Furthermore, LoRa communication incorporates built-in forward error correction (FEC) technology, allowing for customizable bit rates to mitigate sudden interference.

[0105] Due to the above characteristics, LoRa communication technology has the following advantages over other communication technologies: First, its communication sensitivity can reach -148dBm, enabling long transmission distances with extremely low power consumption. Second, its use of special spread spectrum modulation technology effectively resists the effects of crystal oscillator drift and Doppler shift, making it suitable for deployment in complex and diverse application scenarios.

[0106] Secondly, its built-in forward error correction technology with a customizable bit rate provides a certain degree of protection against sudden interference and corrects erroneous data packets. Furthermore, LoRa operates in unlicensed frequency bands, making it suitable for a wide range of scenarios. Finally, its network typically adopts a star topology, which is less complex than a mesh topology, easier to deploy, and can accommodate a large number of nodes, providing a stable, secure, and low-maintenance wireless sensor network. Given the inherent characteristics of SF6 digitalization and its service requirements, LoRa, with its low power consumption, wide coverage, and strong penetration, is an ideal networking option for SF6 digital density telemetering networks.

[0107] In addition, if Figure 4 As shown, an embodiment of the present invention further provides a method for remote online monitoring of SF6 gas, comprising the steps of:

[0108] The SF6 gas density relay is installed in the substation equipped with SF6 electrical equipment. The SF6 gas density relay is an anti-interference remote transmission SF6 gas density relay based on the long-distance radio technology LoRa.

[0109] The SF6 gas density relay has built-in LoRa forward error correction coding technology; the code rate can be customized to cope with sudden interference;

[0110] Among them, the SF6 gas density relay uses spread spectrum modulation technology to resist the influence caused by crystal drift and Doppler frequency shift;

[0111] Connect the data of SF6 digital density telemeter to a unified IoT management platform.

[0112] Specifically, in the embodiment of the present invention, it further includes: inspecting the GIS equipment in the substation every 14 to 16 days.

[0113] Specifically, in an embodiment of the present invention, the method includes the steps of sharing and linking the data of the main equipment on the power transmission and transformation side.

[0114] Specifically, in an embodiment of the present invention, the step of uploading the parameter information and alarm information of the SF6 gas density relay and the parameter information of the temperature measurement module, oxygen measurement module, pressure measurement module and heat dissipation module to the Internet of Things management platform through the same communication protocol is also included.

[0115] In addition, if Figure 5 As shown, an embodiment of the present invention further provides an electronic device, including:

[0116] Memory, for storing computer programs;

[0117] a processor for executing a computer program;

[0118] The computer program is used to execute the above-mentioned SF6 gas remote online monitoring method.

[0119] The technical solution of the embodiments of the present invention offers the advantage of enabling data monitoring and diagnosis of all circuit breakers and GIS equipment within a substation, providing real-time insights into the operating status of circuit breakers and GIS equipment within the substation. This significantly reduces the workload and expenses of inspection workers, significantly lowers subsequent product maintenance costs, and improves economic efficiency. For example, with a 110kV substation equipped with two main transformers, 15 sensors can be deployed. With an inspection frequency of once every 15 days, 24 inspections can be reduced annually. Furthermore, remote data analysis can be used to determine the insulation level trends of GIS equipment, thereby avoiding personnel safety risks associated with reduced insulation levels. Subsequent data can be exported and uploaded to the Internet of Things management platform for unified management. This case integrates sensing technology, data collection technology, and reliable communication technology. By integrating the traditional density mechanical meter and wireless remote transmission into a compact integrated design, it can be modified or directly installed in a limited space. It can continuously monitor SF6 status parameters and timely capture the precursor information of early failure of GIS equipment. It can reliably monitor and transmit SF6 gas density in substations with strong electromagnetic interference through wireless means, thereby ensuring the safe and reliable operation of power supply equipment. Compared with existing technologies, it saves a lot of workload and expenses of inspection workers, greatly reduces the later maintenance cost of the product, improves economic benefits, and has significant technical effects.

[0120] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic inventive concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the invention. Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the invention. Thus, the present invention is intended to include such changes and modifications as fall within the scope of the claims and their equivalents.

Claims

1. A SF6 gas remote online monitoring system, characterized in that: include: SF6 gas density relay, including LoRa anti-interference module and LoRa forward error correction coding module; The communication module and the Internet of Things management platform also include a temperature measurement module, an oxygen measurement module, a pressure measurement module, and a heat dissipation module respectively connected to the communication module; The communication module is used to upload the parameter information and alarm information of the SF6 gas density relay and the parameter information of the temperature measurement module, oxygen measurement module, pressure measurement module and heat dissipation module to the Internet of Things management platform through the same communication protocol; The LoRa anti-interference module is used to perform spread spectrum modulation processing on the received signal based on orthogonal frequency division multiple access technology and orthogonal amplitude modulation technology. Specifically, it includes: presetting different subcarrier sets for each communication module; sending test information to the Internet of Things management platform through each communication module, and receiving feedback information returned from the Internet of Things management platform; reallocating subcarrier sets to all communication modules based on the feedback information; the communication module modulates the received information bits to generate the real and imaginary parts of the signal bits; linearly combining the real and imaginary parts to form a complex signal; and modulating the complex signal to obtain an orthogonal amplitude modulation signal. The LoRa forward error correction coding module includes a LoRa channel encoder and a LoRa signal decoder. The LoRa forward error correction coding module can customize the code rate and is used to encode, decode, and correct the monitored data using a convolutional code. Specifically, it includes: Decompose the monitored data into information bits corresponding to the number of register units; store the decomposed information bits in each register unit respectively; perform algebraic operations on the information bits in each register unit, and output the operation results as encoding results; wherein the encoding results include multiple check bit sequences and data bit sequences; the LoRa signal decoder receives the encoding results of the LoRa channel encoder; compares the multiple check bit sequences and data bit sequences in the received encoding results with all preset transmission sequences, and provides a preset transmission sequence with the smallest code distance with the multiple check bit sequences and data bit sequences in the encoding results; decodes the data bit sequence in the received encoding results; performs algebraic calculations on all check bit sequences and compares them with the information bits in the register units, and corrects the information bits with differences; resends the corrected information bits to the encoder for another algebraic operation, and then sends them to the communication module through a determined preset transmission sequence.

2. The SF6 gas remote online monitoring system according to claim 1, characterized in that: Also includes: The inspection reminder module is used to remind the SF6 gas density relay to inspect the GIS equipment in the substation on the set inspection date.

3. The SF6 gas remote online monitoring system according to claim 2, characterized in that: Also includes: Inspection operation video monitoring module, used to monitor GIS equipment in substations.

4. A method for remote online monitoring of SF6 gas, characterized in that: The SF6 gas remote online monitoring system as claimed in claim 1 specifically comprises the following steps: Install the SF6 gas density relay in the substation where SF6 electrical equipment is installed; The LoRa anti-interference module performs spread spectrum modulation processing on the received signal based on orthogonal frequency division multiple access technology and orthogonal amplitude modulation technology. The LoRa forward error correction coding module uses convolutional code encoding to encode, decode and correct the monitored data. The communication module connects the data of the SF6 gas density relay to the Internet of Things management platform.

5. The SF6 gas remote online monitoring method according to claim 4, characterized in that: The SF6 gas remote online monitoring system also includes: an inspection prompt module, which is used to prompt the SF6 gas density relay to inspect the GIS equipment in the substation on the set inspection date.

6. The SF6 gas remote online monitoring method according to claim 5, characterized in that: The SF6 gas remote online monitoring system also includes: a patrol operation video monitoring module for monitoring GIS equipment in the substation.

7. An electronic device, characterized in that: include: Memory, for storing computer programs; a processor for executing a computer program; The computer program is used to execute the SF6 gas remote online monitoring method as described in any one of claims 4 to 6.

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