SF6 monitoring module based on transformer substation

Abstract

The invention discloses an SF6 monitoring module based on a transformer substation, and relates to the technical field of SF6 monitoring, the SF6 monitoring module comprises a main body, a gas monitoring assembly, a real-time display assembly and an alarm assembly, the main body comprises an explosion-proof shell and a power supply assembly arranged in the explosion-proof shell, the gas monitoring assembly is arranged on the main body and is used for monitoring the state of SF6 gas in real time, and the real-time display assembly is used for displaying the state of the SF6 gas. The gas monitoring assembly comprises an optical fiber sensing detection unit, the optical fiber sensing detection unit further comprises a light source, an optical fiber sensor, a photoelectric detector and an optical splitter, the real-time display assembly is embedded in the explosion-proof shell and used for displaying monitoring data, and the real-time display assembly comprises an interaction screen. According to the invention, comprehensive monitoring and efficient management of the SF6 gas state are realized by integrating an optical fiber sensing technology, an intelligent alarm mechanism and a remote monitoring function, the safety and environmental protection performance of substation equipment are remarkably improved, and the system has important application value and popularization prospect.

Description

Technical Field

[0001] This invention relates to the field of SF6 monitoring technology, and in particular to an SF6 monitoring module based on a substation. Background Technology

[0002] Sulfur hexafluoride (SF6) gas is widely used in high-voltage electrical equipment in substations due to its excellent insulation and arc-quenching properties. However, SF6 gas leaks can cause serious environmental damage, and its pressure, temperature, and concentration directly affect the operational safety and stability of the equipment. Therefore, real-time monitoring of the SF6 gas status is crucial for ensuring the safe operation of substation equipment and protecting the environment.

[0003] Traditional SF6 gas monitoring methods typically rely on mechanical pressure gauges or single sensors, which have the following drawbacks:

[0004] First, the sensitivity is low, and traditional methods are insufficient to detect minute leaks, making it impossible to promptly identify potential hazards. Second, the anti-interference capability is poor; in the complex electromagnetic environment of substations, traditional sensors are easily interfered with, leading to inaccurate data. Third, the functions are limited, lacking intelligent alarm and remote monitoring capabilities, making it impossible for maintenance personnel to monitor equipment status in real time. Fourth, the safety is insufficient; some equipment does not adopt explosion-proof design, posing safety hazards in high-voltage environments.

[0005] To address the aforementioned issues, there is an urgent need for an SF6 monitoring module that integrates high-sensitivity sensing technology, intelligent alarm mechanisms, and remote monitoring functions to achieve comprehensive monitoring and efficient management of the SF6 gas state. Summary of the Invention

[0006] In view of the problems existing in the SF6 monitoring modules based on substations, this invention is proposed.

[0007] Therefore, the problems to be solved by this invention are low sensitivity, limited functionality, and insufficient security.

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0009] This invention provides an SF6 monitoring module based on a substation, which includes a main body, a gas monitoring component, a real-time display component, and an alarm component;

[0010] The main body includes an explosion-proof housing and a power supply component housed within the explosion-proof housing;

[0011] A gas monitoring component, mounted on the main body, is used to monitor the state of SF6 gas in real time. The gas monitoring component includes a fiber optic sensing and detection unit, which further includes a light source, a fiber optic sensor, a photodetector, and a beam splitter.

[0012] A real-time display component, embedded in an explosion-proof housing, is used to display monitoring data. The real-time display component includes an interactive screen.

[0013] The alarm component is used to alert for abnormal situations. The alarm component includes a signal processing unit, a communication module, a local alarm component, a remote alarm component, and an alarm threshold setting module.

[0014] As a preferred embodiment of the SF6 monitoring module based on substations in this invention, the light source in the fiber optic sensing unit is connected to the fiber optic sensor via an optical fiber. The optical signal collected by the fiber optic sensor is transmitted to the photodetector via a beam splitter. The photodetector converts the optical signal into an electrical signal and then transmits it to the signal processing unit.

[0015] As a preferred embodiment of the SF6 monitoring module based on substations in this invention, the signal processing unit is connected to the interactive screen via a connecting cable, and is used to display the processed monitoring data on the interactive screen in real time.

[0016] As a preferred embodiment of the SF6 monitoring module based on substations in this invention, the signal processing unit is connected to the local alarm component via a signal line. When the monitoring data exceeds the alarm threshold, the signal processing unit triggers the local alarm component to issue an alarm signal.

[0017] As a preferred embodiment of the SF6 monitoring module based on substations in this invention, the signal processing unit is connected to the remote alarm component through a communication module. When the monitoring data exceeds the alarm threshold, the signal processing unit sends alarm information to the remote alarm component through the communication module.

[0018] As a preferred embodiment of the SF6 monitoring module based on substations in this invention, the signal processing unit and the alarm threshold setting module are connected via a control bus. The user can input the alarm threshold through the interactive screen, and the alarm threshold setting module transmits the threshold information to the signal processing unit for judgment.

[0019] As a preferred embodiment of the SF6 monitoring module based on substations in this invention, the explosion-proof housing is connected to the fiber optic sensor via a sealed joint, and the probe portion of the fiber optic sensor extends out of the explosion-proof housing for direct contact with the SF6 gas environment.

[0020] As a preferred embodiment of the SF6 monitoring module based on substations in this invention, the local alarm component includes a buzzer, an LED indicator, and a relay module. The buzzer and LED indicator are connected to the signal processing unit via signal lines, and the relay module is connected to an external alarm device via control signal lines.

[0021] As a preferred embodiment of the SF6 monitoring module based on substations of the present invention, the power supply component is connected to the light source, signal processing unit, interactive screen, local alarm component, remote alarm component and communication module respectively through power lines, providing stable power for the above components.

[0022] The beneficial effects of this invention are:

[0023] This SF6 monitoring module has high sensitivity and accuracy. It adopts a fiber optic sensing detection unit, which works in concert with a light source, fiber optic sensor, photodetector and spectrometer to monitor parameters such as pressure, temperature and concentration of SF6 gas in real time. Fiber optic sensing technology has extremely high sensitivity to trace SF6 gas leaks, with detection accuracy down to the ppm level, ensuring early detection of potential hazards.

[0024] This SF6 monitoring module features an intelligent alarm mechanism, integrating a signal processing unit, local alarm components, and remote alarm components, supporting multi-level alarm mechanisms:

[0025] Primary alarm: When the monitored data approaches the alarm threshold, a prompt signal is emitted through a buzzer and LED indicator.

[0026] Advanced alarms trigger audible and visual alarms and notify maintenance personnel when monitored data exceeds alarm thresholds;

[0027] Severe anomaly response: When the monitoring data deviates significantly from the safe range, the power supply to the relevant equipment will be automatically cut off, and maintenance personnel will be notified through multiple channels.

[0028] The alarm threshold setting module allows users to flexibly set alarm conditions through an interactive screen to meet the needs of different scenarios.

[0029] Beneficial effects

[0030] This SF6 monitoring module has strong anti-interference capabilities, adopts fiber optic sensing technology and explosion-proof housing to ensure stable operation of the system in the complex electromagnetic environment of substations. The explosion-proof housing is connected to the fiber optic sensor through a sealed connector, and the probe is in direct contact with the SF6 gas environment. At the same time, it achieves an IP67 or higher protection level, making it suitable for harsh outdoor conditions.

[0031] This SF6 monitoring module features real-time display and remote monitoring. The real-time display component is embedded in an explosion-proof housing, and the monitoring data is displayed intuitively through an interactive screen for easy viewing by on-site personnel. The communication module supports multiple communication methods and uploads the monitoring data to a cloud monitoring platform, supporting remote viewing and management. Maintenance personnel can monitor the equipment status in real time through a web or mobile terminal, improving maintenance efficiency.

[0032] This SF6 monitoring module is safe and reliable. The power supply component provides a stable power supply to each module through the power cord and is equipped with a backup battery to ensure that the system can still operate normally in the event of a power outage. The system has an automatic cut-off function, which can actively cut off the power supply to relevant equipment in case of serious abnormalities to prevent further leakage or failure. The whole system is easy to maintain and expand, and the modular design facilitates installation, calibration and maintenance. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0034] Figure 1 This is a block diagram of the overall structure of the SF6 monitoring module based on a substation. Detailed Implementation

[0035] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0036] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0037] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0038] This invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of this invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this invention. In actual fabrication, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0039] Furthermore, in the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In addition, the terms "first," "second," or "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" in this invention should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; similarly, they can refer to mechanical connections, electrical connections, or direct connections, or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] Example 1

[0042] like Figure 1 As shown, this embodiment provides an SF6 monitoring module based on a substation, including a main body, a gas monitoring component, a real-time display component, and an alarm component. The core components of the module are all integrated within an explosion-proof housing, ensuring stable operation of the equipment under high voltage, strong electromagnetic interference, and harsh environments.

[0043] The main body is made of high-strength metal material with an explosion-proof shell, and the protection level can reach IP67 or higher, which can effectively resist external impact, moisture and dust intrusion.

[0044] The power supply component adopts a built-in industrial-grade switching power supply and a backup lithium battery, which provides a stable working power to the light source, signal processing unit, interactive screen, local alarm component, remote alarm component and communication module through the power cord, ensuring that the system can still operate normally in the event of a power outage.

[0045] The gas monitoring component is the core of the monitoring module. Its core is the fiber optic sensing and detection unit, which includes a light source, fiber optic sensor, photodetector and beam splitter. The light source is a narrow linewidth laser that emits light signals of a specific wavelength (such as around 10.5µm, corresponding to the absorption peak of SF6 gas) to ensure high sensitivity detection of SF6 gas.

[0046] The fiber optic sensor is connected to the light source via optical fiber. The probe extends out of the explosion-proof housing and comes into direct contact with the SF6 gas environment. The fiber optic sensor collects changes in parameters such as gas pressure, temperature and concentration, and transmits the optical signal to the beam splitter.

[0047] A beam splitter is used to separate the optical signal collected by the fiber optic sensor and transmit it to the photodetector.

[0048] The photodetector converts the received light signal into an electrical signal and transmits it to the signal processing unit through the signal line. Through the aforementioned fiber optic sensing technology, this module achieves high-precision monitoring of the SF6 gas state, with a detection accuracy of up to the ppm level. It can detect trace leaks in a timely manner and ensure early detection of potential hazards.

[0049] The real-time display component is embedded in an explosion-proof housing, and the monitoring data is displayed intuitively through an interactive screen.

[0050] The signal processing unit demodulates, filters, and performs compensation calculations on the received electrical signal to obtain the actual state parameters of SF6 gas pressure, temperature, and concentration.

[0051] The interactive screen is connected to the signal processing unit via a cable, displays monitoring data in real time, and allows users to set alarm thresholds via the touchscreen.

[0052] The alarm component integrates a signal processing unit, a local alarm component, a remote alarm component, and an alarm threshold setting module, supporting multi-level alarm mechanisms.

[0053] The primary alarm is triggered when the monitored data approaches the alarm threshold. At this time, the signal processing unit triggers the primary alarm, the buzzer emits a slight sound, and the LED indicator flashes yellow to alert on-site personnel.

[0054] The advanced alarm is triggered when the monitored data exceeds the alarm threshold. At this time, the signal processing unit triggers the advanced alarm, the buzzer emits a high-frequency sound, the LED indicator light stays on red, the relay module activates the external audible and visual alarm, and the communication module notifies the maintenance personnel via SMS / email.

[0055] The trigger condition for a severe anomaly response is as follows: when the monitoring data deviates significantly from the safe range, the signal processing unit triggers a severe anomaly response, the system automatically cuts off the power supply to the relevant equipment to prevent further leakage or failure; the buzzer continuously emits a high-frequency sound, and the LED indicator flashes red rapidly; the remote alarm component notifies maintenance personnel through multiple channels, such as messages, emails, and telephones, and generates an emergency repair task order.

[0056] The communication module supports multiple communication methods to upload monitoring data to the cloud monitoring platform.

[0057] The cloud-based monitoring platform receives and stores monitoring data, providing a visual interface and data analysis functions.

[0058] During remote management, maintenance personnel can access the cloud monitoring platform via web or mobile devices to view real-time data, historical records, and alarm information. It also supports remote setting of alarm thresholds, sensor calibration, firmware upgrades, and other functions.

[0059] Working principle

[0060] The light source is a narrow-linewidth laser that emits light signals at specific wavelengths, such as around 10.5µm, which corresponds to the absorption peak of SF6 gas. This wavelength selection ensures high-sensitivity detection of SF6 gas.

[0061] The fiber optic sensor is connected to a light source via optical fiber. Its probe extends out of the explosion-proof housing and directly contacts the SF6 gas environment. The fiber optic sensor can capture changes in parameters such as the pressure, temperature, and concentration of SF6 gas and convert these changes into changes in optical signals. The optical signals are transmitted to a beam splitter via optical fiber. The beam splitter separates the optical signals and transmits them to a photodetector. The photodetector converts the received optical signals into electrical signals and transmits them to a signal processing unit via a signal line. Through the above-mentioned fiber optic sensing technology, the module can achieve high-precision monitoring of the SF6 gas state, with a detection accuracy of up to the ppm level, which is significantly better than traditional mechanical pressure gauges or single-sensor detection methods, thereby ensuring early detection of trace leaks.

[0062] The signal processing unit is the core processing component of the SF6 monitoring module. It is responsible for demodulating, filtering, and compensating the received data, and displaying the processed data on the interactive screen in real time. The signal processing unit receives the electrical signal transmitted by the photodetector, demodulates and filters it to remove noise interference, and extracts the actual state parameters of SF6 gas pressure, temperature, and concentration. At the same time, the signal processing unit combines the user-defined values ​​stored in the alarm threshold setting module to determine whether the current monitoring data exceeds the safe range.

[0063] The processed data is transmitted to the interactive screen via a connection cable. The interactive screen embedded in the explosion-proof housing is used to intuitively display the monitoring data, such as "Pressure: 0.6MPa, Temperature: 25℃, Concentration: 500ppm". Users can flexibly set alarm thresholds through the interactive screen. The alarm threshold setting module transmits the threshold information to the signal processing unit for judgment. This process ensures the real-time, accuracy and visualization of the monitoring data, making it easy for on-site personnel to quickly grasp the equipment status.

[0064] When the monitored data approaches the alarm threshold (e.g., the pressure drops to 0.5MPa but is higher than 0.4MPa), the signal processing unit triggers a primary alarm, the buzzer emits a slight sound, and the LED indicator flashes yellow to remind on-site personnel to pay attention to potential hazards.

[0065] When the monitored data exceeds the alarm threshold (such as pressure below 0.4MPa or concentration exceeding 1000ppm), the signal processing unit triggers an advanced alarm, the buzzer emits a high-frequency sound, the LED indicator light stays on red, the relay module activates the external audible and visual alarm, and at the same time, the communication module notifies the maintenance personnel via SMS / email.

[0066] When the monitoring data deviates significantly from the safe range (such as pressure below 0.3 MPa or concentration exceeding 5000 ppm), the signal processing unit triggers a severe abnormality response, the system automatically cuts off the power to the relevant equipment to prevent further leakage or failure; the buzzer continuously emits a high-frequency sound, the LED indicator flashes red rapidly, the remote alarm component notifies the operation and maintenance personnel through multiple information transmission channels, and generates an emergency repair task order.

[0067] The multi-level alarm mechanism ensures the system's rapid response capability under different abnormal conditions, thereby improving the safety and reliability of the equipment.

[0068] The communication module supports multiple communication methods, such as RS485, Ethernet, LoRa, NB-IoT, and Wi-Fi, and uploads monitoring data to the cloud monitoring platform to achieve remote monitoring and management.

[0069] The communication module uploads the monitoring data processed by the signal processing unit to the cloud monitoring platform, using lightweight MQTT or HTTP protocols to ensure efficient transmission.

[0070] The cloud-based monitoring platform receives and stores monitoring data, provides historical data analysis functions, and allows maintenance personnel to access the platform via web or mobile devices to view real-time data, historical records, and alarm information. It also supports remote setting of alarm thresholds, sensor calibration, firmware upgrades, and other functions.

[0071] Remote monitoring reduces the frequency of on-site inspections, improves operation and maintenance efficiency, and provides technical support for the intelligent operation and maintenance of substations.

[0072] To ensure the stable operation of the module in the complex electromagnetic environment and harsh conditions of substations, this invention adopts protective measures. The explosion-proof housing has a protection level of IP67 or higher, which can effectively resist external impact, moisture and dust intrusion. Fiber optic sensing technology and the design of the explosion-proof housing ensure that the module operates stably in the environment of strong electromagnetic interference and is suitable for harsh outdoor conditions. These designs significantly improve the reliability and service life of the module, enabling it to operate stably for a long time in the high-voltage, strong electromagnetic interference substation environment.

[0073] In summary, this invention, by integrating fiber optic sensing technology, intelligent alarm mechanisms, and remote monitoring functions, achieves comprehensive monitoring and efficient management of SF6 gas status, significantly improving the safety and environmental performance of substation equipment, and has significant application value and promising prospects for promotion.

[0074] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An SF6 monitoring module based on a substation, characterized in that, It includes the main body, gas monitoring components, real-time display components, and alarm components; The main body includes an explosion-proof housing and a power supply assembly; The gas monitoring component is mounted on the main body and is used to monitor the state of SF6 gas in real time. The gas monitoring component includes an optical fiber sensing and detection unit, which further includes a light source, an optical fiber sensor, a photodetector, and a beam splitter. The real-time display component is embedded in the explosion-proof housing and is used to display monitoring data. The real-time display component includes an interactive screen. The alarm component is used to alarm for abnormal situations. The alarm component includes a signal processing unit, a communication module, a local alarm component, a remote alarm component, and an alarm threshold setting module.

2. The SF6 monitoring module based on a substation according to claim 1, characterized in that, The light source in the fiber optic sensing unit is connected to the fiber optic sensor via an optical fiber. The optical signal collected by the fiber optic sensor is transmitted to the photodetector via a beam splitter. The photodetector converts the optical signal into an electrical signal and then transmits it to the signal processing unit.

3. The SF6 monitoring module based on a substation according to claim 1, characterized in that, The signal processing unit is connected to the interactive screen via a connecting cable, and is used to display the processed monitoring data on the interactive screen in real time.

4. The SF6 monitoring module based on a substation according to claim 1, characterized in that, The signal processing unit is connected to the local alarm component via a signal line. When the monitored data exceeds the alarm threshold, the signal processing unit triggers the local alarm component to issue an alarm signal.

5. The SF6 monitoring module based on a substation according to claim 1, characterized in that, The signal processing unit is connected to the remote alarm component via a communication module. When the monitored data exceeds the alarm threshold, the signal processing unit sends alarm information to the remote alarm component via the communication module.

6. The SF6 monitoring module based on a substation according to claim 1, characterized in that, The signal processing unit is connected to the alarm threshold setting module via a control bus. The user can input the alarm threshold through the interactive screen, and the alarm threshold setting module will transmit the threshold information to the signal processing unit for judgment.

7. The SF6 monitoring module based on a substation according to claim 1, characterized in that, The explosion-proof housing is connected to the fiber optic sensor via a sealed joint. The probe portion of the fiber optic sensor extends out of the explosion-proof housing for direct contact with the SF6 gas environment.

8. The SF6 monitoring module based on a substation according to claim 1, characterized in that, The local alarm component includes a buzzer, an LED indicator, and a relay module. The buzzer and LED indicator are connected to the signal processing unit via signal lines, and the relay module is connected to an external alarm device via control signal lines.

9. The SF6 monitoring module based on a substation according to claim 1, characterized in that, The power supply component is connected to the gas monitoring component, the real-time display component, and the alarm component via power lines, providing a stable power supply for these components.

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