Data acquisition and transmission device for whole process operation of substation sulfur hexafluoride

Abstract

The application provides a substation SF6 full-process operation data acquisition and transmission device, a data acquisition module contained in the device is connected with SF6 gas processing equipment and detection instruments by integrating a multi-protocol access unit composed of multiple communication protocol interfaces, so that parameter data of SF6 gas in the recycling, purification, detection and recharge operation process can be acquired; a data transmission module contained in the device is connected with the data acquisition module, and can transmit the acquired parameter data to a power system intranet database; a control module contained in the device controls the data acquisition module and the data transmission module, and thus the substation SF6 full-process operation data acquisition and transmission device provided by the application can be adapted to multiple source heterogeneous equipment with different interfaces in the SF6 gas full-process operation scene, so that a single device can complete the acquisition and transmission of SF6 gas recycling, purification, detection, recharge and other full-process operation data.

Description

Technical Field

[0001] This application relates to the field of data acquisition and transmission technology, and in particular to a data acquisition and transmission device for the entire process of sulfur hexafluoride operation in a substation. Background Technology

[0002] Sulfur hexafluoride (SF6) gas is a critical insulating and arc-extinguishing medium in power equipment, and its operational quality throughout its entire life cycle directly affects the safe operation of the power system and the protection of the ecological environment. According to the "Supervision Guidelines for Sulfur Hexafluoride Gas in the Power Industry" (DL / T 595-2016), multiple core parameters related to SF6 gas, including trace moisture, gas purity, and decomposition products, must be subject to full-process traceability management during the recovery, purification, detection, and recharging stages.

[0003] Manual recording was an early method of data collection for SF6 gas operations. As the most basic data collection method, it has the following technical limitations: 1) Data integrity defects: Paper records are difficult to construct operation data maps that are continuous in time and spatially related; 2) Poor real-time performance: Data needs to be manually sorted before being entered into the system, resulting in serious lag; 3) Risk of human interference: There is a possibility of data tampering or clerical errors in the manual intervention process.

[0004] To address the problems caused by manual recording, general-purpose data acquisition equipment can be introduced to achieve basic electronic data collection. However, general-purpose data acquisition equipment often adopts a single fixed interface architecture, such as only including an RS485 interface, which makes it incompatible with multi-source heterogeneous equipment that uses other interface protocols in the entire process of SF6 gas recovery, purification, detection, and recharging. Utility Model Content

[0005] This utility model provides a data acquisition and transmission device for the entire process of sulfur hexafluoride operation in substations, in order to solve the problem of the single interface architecture of general data acquisition equipment.

[0006] This utility model provides a data acquisition and transmission device for the entire process of sulfur hexafluoride (SF6) operation in a substation, comprising:

[0007] The data acquisition module integrates a multi-protocol access unit composed of multiple communication protocol interfaces. It is used to connect with the sulfur hexafluoride gas treatment equipment and detection instruments through the multi-protocol access unit to collect parameter data of sulfur hexafluoride gas during the recovery, purification, detection and recharging process.

[0008] A data transmission module, connected to the data acquisition module, is used to transmit the parameter data to the power system intranet database;

[0009] The control module is connected to both the data acquisition module and the data transmission module, and is used to coordinate the collaborative work between the data acquisition module and the data transmission module.

[0010] Furthermore, the device also includes:

[0011] The external protective enclosure has a double-layer structure, with an outer waterproof layer and an inner electromagnetic shielding layer, which provides waterproof and electromagnetic shielding protection for the data acquisition module, the data transmission module and the main controller.

[0012] Optionally, each communication interface integrated in the multi-protocol access unit integrates an electromagnetic isolation circuit, and each communication interface is fixed to the external protective housing by a conductive rubber ring, forming a continuous conductive path with the electromagnetic shielding layer.

[0013] Optionally, the multi-protocol access unit integrates an RS485 interface, an RS232 interface, and a Bluetooth communication module;

[0014] The RS485 interface uses an optocoupler isolation circuit, the RS232 interface uses a ferrite bead filter circuit and a transient voltage suppression device, and the Bluetooth communication module uses a Class 1 industrial-grade Bluetooth chip.

[0015] Optionally, the data transmission module integrates a power private network transmission unit, used to encrypt and transmit the parameter data to the power system intranet database via the power private network.

[0016] Optionally, the power grid communication unit integrates an SM2 encryption chip, supporting hardware acceleration of national cryptographic algorithms.

[0017] Furthermore, the data transmission module also integrates a breakpoint resume control circuit, which includes a non-volatile memory for temporary data storage when transmission is interrupted.

[0018] Optionally, the control module integrates a clock circuit and a storage controller. The clock circuit is used to add timestamps to the parameter data, and the storage controller is used to organize and store the timestamped parameter data in a time sequence.

[0019] Optionally, the clock circuit includes a temperature-compensated crystal oscillator with a frequency stability better than ±1ppm.

[0020] Optionally, the storage controller adopts a ring buffer structure, where new data automatically overwrites the oldest stored data to ensure temporal continuity.

[0021] This utility model embodiment provides a data acquisition and transmission device for the entire process of sulfur hexafluoride (SF6) operation in substations. The included data acquisition module connects to SF6 gas processing equipment and detection instruments via a multi-protocol access unit composed of multiple communication protocol interfaces, thereby acquiring parameter data during the recovery, purification, detection, and recharging processes of SF6 gas. The included data transmission module, connected to the data acquisition module, transmits the acquired parameter data to the power system's intranet database. The included control module coordinates the collaborative work of the data acquisition module and the data transmission module. Therefore, the data acquisition and transmission device for the entire process of SF6 operation in substations provided by this utility model embodiment can be adapted to multi-source heterogeneous equipment with different interfaces in SF6 gas operation scenarios, enabling a single device to complete the acquisition and transmission of data for the entire process of SF6 gas recovery, purification, detection, and recharging. Attached Figure Description

[0022] Figure 1 A schematic diagram of a substation sulfur hexafluoride full-process operation data acquisition and transmission device provided for an embodiment of this utility model;

[0023] Figure 2 A schematic diagram of the structure of another substation sulfur hexafluoride full-process operation data acquisition and transmission device provided for an embodiment of this utility model;

[0024] Figure 3 A schematic diagram of the structure of another substation sulfur hexafluoride full-process operation data acquisition and transmission device provided for an embodiment of this utility model;

[0025] Figure 4 This is a structural example diagram of a substation sulfur hexafluoride full-process operation data acquisition and transmission device provided for an embodiment of this utility model. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, the embodiments and features described herein can be combined with each other unless otherwise specified. It should also be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings, not the entire structure.

[0027] Figure 1 This is a schematic diagram of a substation sulfur hexafluoride full-process operation data acquisition and transmission device provided as an embodiment of the present invention. Figure 1 As shown, the device specifically includes:

[0028] The data acquisition module 101 integrates a multi-protocol access unit composed of multiple communication protocol interfaces. It is used to connect with the sulfur hexafluoride gas treatment equipment and detection instruments through the multi-protocol access unit to collect parameter data of sulfur hexafluoride gas during the recovery, purification, detection and recharging process.

[0029] A multi-protocol access unit refers to a hardware interface combination consisting of multiple communication protocol interfaces, such as including but not limited to RS485 interface, RS232 interface and Bluetooth communication module.

[0030] Understandably, general-purpose data acquisition equipment often employs a single, fixed interface architecture, such as only including an RS485 interface. However, the entire process of sulfur hexafluoride (SF6) gas operation in substations involves the use of various equipment for recovery, purification, detection, and recharging. Different equipment may support different communication interfaces; for example, a recovery device might use an RS485 interface, a purification device might use an industrial Ethernet interface, a detection device might use an RS232 interface or a Bluetooth communication module, and a recharging device might use a 4-20mA analog output port. Therefore, general-purpose data acquisition equipment cannot be adapted to the diverse and heterogeneous equipment using different communication interfaces in the entire process of SF6 gas recovery, purification, detection, and recharging, thus making it impossible to collect SF6 operation data from a single device.

[0031] The data transmission module 102 is connected to the data acquisition module 101 and is used to transmit the parameter data to the power system intranet database.

[0032] It can be understood that, according to the "Regulations on Security Protection of Power Monitoring Systems," data in power production control areas (such as substations) must be strictly physically isolated from the Internet to prevent external attacks. Furthermore, sulfur hexafluoride gas, as an insulating medium for high-voltage equipment, makes its operational data sensitive information within the power industry, requiring storage in a power system intranet database that complies with the "Basic Requirements for Network Security Level Protection of Information Security Technology." In addition, by transmitting the collected operational data to the intranet database, it is possible to link with the power dispatching system and equipment management system to achieve real-time monitoring of the sulfur hexafluoride gas status. Simultaneously, recording the entire process of operational data (such as recovery time, test results, and operators) through the power system intranet database can meet the power industry's audit requirements for operational compliance. The function of the data transmission module 102 is to transmit the parameter data collected by the data acquisition module 101 to the power system intranet database.

[0033] The control module 103 is connected to the data acquisition module 101 and the data transmission module 102 respectively, and is used to coordinate the collaborative work of the data acquisition module 101 and the data transmission module 102.

[0034] Understandably, after the data acquisition module 101 collects the parameter data for the entire operation process, according to the communication protocol agreed upon with the power system's intranet database, the collected parameter data needs to be integrated and processed into the data format specified in the protocol before it can be transmitted. Furthermore, the collected parameter data also needs to be cached. Therefore, the function of the control module 103 is to perform preliminary processing on the parameter data collected by the data acquisition module 101 to meet the transmission requirements of the data transmission module 102.

[0035] Optionally, the control module 103 integrates a programmable logic controller (PLC), a microcontroller unit (MCU), a digital signal processor (DSP), or any other type of processor. The control module 103 may integrate one or more processors.

[0036] Optionally, the control module 103 can be connected to the data acquisition module 101 and the data transmission module 102 via either wired or wireless communication. Wireless communication includes, but is not limited to, Wi-Fi, Bluetooth, and 4G / 5G mobile communication; wired communication includes, but is not limited to, Ethernet and serial communication.

[0037] This utility model embodiment provides a data acquisition and transmission device for the entire process of sulfur hexafluoride (SF6) operation in substations. The included data acquisition module connects to SF6 gas processing equipment and detection instruments via a multi-protocol access unit composed of multiple communication protocol interfaces, thereby acquiring parameter data during the recovery, purification, detection, and recharging processes of SF6 gas. The included data transmission module, connected to the data acquisition module, transmits the acquired parameter data to the power system's intranet database. The included control module coordinates the collaborative work of the data acquisition module and the data transmission module. Therefore, the data acquisition and transmission device for the entire process of SF6 operation in substations provided by this utility model embodiment can be adapted to multi-source heterogeneous equipment with different interfaces in SF6 gas operation scenarios, enabling a single device to complete the acquisition and transmission of data for the entire process of SF6 gas recovery, purification, detection, and recharging.

[0038] Figure 2 This is a schematic diagram of the structure of a data acquisition and transmission device for the entire process of sulfur hexafluoride operation in a substation, provided by another embodiment of the present invention. This embodiment is further optimized based on the above embodiment.

[0039] like Figure 2As shown, the substation sulfur hexafluoride full-process operation data acquisition and transmission device provided in this embodiment, based on the data acquisition module 201, data transmission module 202, and control module 203, also includes an optimized addition: an external protective enclosure 204. Among these,

[0040] The external protective enclosure 204 has a double-layer structure, with an outer waterproof layer and an inner electromagnetic shielding layer, which provides waterproof and electromagnetic shielding protection for the data acquisition module 201, the data transmission module 202 and the control module 203.

[0041] Understandably, a substation is a strong electromagnetic environment. By setting up an external protective enclosure 204 with both waterproof and electromagnetic shielding functions, it can meet the operational needs in outdoor scenarios and also cope with the operational needs in the strong electromagnetic environment of a substation.

[0042] Understandably, the electromagnetic interference intensity in substations far exceeds that of conventional environments (electric field strength can reach 1kV / m). General-purpose equipment, due to deficiencies in anti-interference design, weak protocol compatibility, and insufficient safety protection, struggles to meet the high-reliability data acquisition requirements of sulfur hexafluoride (SF6) operations. Therefore, a targeted electromagnetic shielding structure can be designed to improve system robustness.

[0043] Furthermore, each communication interface integrated in the multi-protocol access unit integrates an electromagnetic isolation circuit, and each communication interface is fixed to the external protective housing 204 by a conductive rubber ring, forming a continuous conductive path with the electromagnetic shielding layer.

[0044] Understandably, in a substation environment, communication interfaces are often the main channels for electromagnetic leakage: firstly, external electromagnetic interference is conducted to the internal circuits through the interface cables, resulting in conducted leakage; secondly, gaps in the interfaces create an antenna effect, radiating electromagnetic waves outwards, resulting in radiated leakage. Connecting each communication interface to the electromagnetic shielding layer of the external protective enclosure 204 via conductive rubber rings can form a continuous conductive path, thereby eliminating electromagnetic leakage channels, blocking gap leakage, suppressing common-mode current, and ensuring no electromagnetic leakage at the interfaces.

[0045] Optionally, the multi-protocol access unit integrates an RS485 interface, an RS232 interface, and a Bluetooth communication module; the interface circuit of the RS485 interface adopts an optocoupler isolation circuit, the RS232 interface adopts a ferrite bead filter circuit and a transient voltage suppression device, and the Bluetooth communication module adopts a Class 1 industrial-grade Bluetooth chip.

[0046] RS485 is a common industrial communication protocol widely used for long-distance, multi-node data transmission. In the strong electromagnetic interference environment of substations, if the RS485 interface is not isolated, interference from strong electric fields, magnetic fields, or transient surges may be conducted to the data acquisition device through the communication line, causing equipment damage or data loss. Using optocoupler isolation can effectively isolate common-mode interference (such as noise caused by ground potential difference), significantly improving the reliability of RS485 communication.

[0047] In one embodiment, the isolation voltage of the optocoupler isolation circuit used in the RS485 interface is ≥2500Vrms to effectively prevent high voltage surges from damaging the data acquisition device and extend the equipment life.

[0048] Compared to RS485's long-distance communication (typically over 1200 meters), RS232 is a short-distance communication (typically within 15 meters) and is time-sensitive. The 5μs delay of a typical optocoupler results in a 3.2μs timing skew per data frame. Therefore, the protection design for RS232 interfaces requires a low-latency, high-signal-fidelity scheme. By combining ferrite bead filtering with transient voltage suppression devices, the ferrite bead filtering can suppress high-frequency common-mode interference, while the transient voltage suppressor can discharge lightning surges. Furthermore, this scheme also ensures signal edge steepness.

[0049] For Bluetooth communication modules, substations typically cover large areas, with equipment spread over distances of tens or even hundreds of meters. Using ordinary Bluetooth modules, whose transmission distance is usually around 10 meters, cannot meet the demands of long-distance communication. This necessitates frequent relocation of the data acquisition device to approach the equipment, increasing operational complexity and manual intervention. Furthermore, the outdoor temperature of substations can fluctuate between -20℃ and 60℃, and ordinary Bluetooth modules may not operate stably within this range. Mechanical vibrations or impacts may occur at the substation site, potentially damaging ordinary Bluetooth modules due to their fragile structure. Additionally, ordinary Bluetooth modules have a short lifespan and are unsuitable for long-term deployment.

[0050] The advantages of Class 1 industrial-grade Bluetooth modules are: 1) High transmission power, enabling stable communication up to approximately 100 meters in open environments; 2) Stronger resistance to electromagnetic interference, suitable for the strong electromagnetic fields of substations; 3) Strong compatibility, enabling seamless communication with common Bluetooth communication devices; 4) Operating temperature range of -40℃ to 85℃; 5) IP67 or higher protection rating (dustproof and waterproof); 6) Vibration / shock resistance conforming to IEC60068-2 standard; 7) MTBF (Mean Time Between Failure) exceeding 5 years. Therefore, considering the characteristics of substations such as electromagnetic interference, wide temperature range, and dispersed equipment, the targeted selection of Class 1 industrial-grade Bluetooth modules can effectively solve the problem of insufficient communication distance caused by the dispersed layout of substation equipment and improve the communication stability and reliability of the system in harsh environments.

[0051] This embodiment of the invention, based on the aforementioned embodiments, adds an external protective enclosure with dual protection functions of waterproofing and electromagnetic shielding. This allows a single device to complete the entire process of sulfur hexafluoride gas recovery, purification, detection, and recharging data collection and transmission, while also adapting to outdoor operations and strong electromagnetic environments in substations. Furthermore, each communication interface employs an electromagnetic isolation design and forms a continuous conductive path with the electromagnetic shielding layer of the external protective enclosure, enabling the modules to work together to achieve a synergistic effect greater than the sum of its parts ("1+1>2").

[0052] Figure 3 This is a schematic diagram of another substation sulfur hexafluoride full-process operation data acquisition and transmission device provided by this utility model embodiment. This embodiment is further optimized based on the above embodiment.

[0053] like Figure 3 As shown, the substation sulfur hexafluoride full-process operation data acquisition and transmission device provided in this embodiment includes: a data acquisition module 301, a data transmission module 302, a control module 303, and an external protective enclosure 304. Among them,

[0054] The data transmission module 302 integrates a power private network transmission unit, which is used to encrypt and transmit the parameter data to the power system intranet database via the power private network.

[0055] Optionally, the power grid communication unit integrates an SM2 encryption chip, supporting hardware acceleration of national cryptographic algorithms.

[0056] Understandably, given the sensitivity and importance of substation operation data, integrating a dedicated power grid transmission unit with data encryption processing capabilities can ensure secure data transmission and prevent eavesdropping during data transmission.

[0057] Furthermore, the data transmission module 302 also integrates a breakpoint resume control circuit, which includes a non-volatile memory for temporary data storage when transmission is interrupted.

[0058] Understandably, by setting up a breakpoint resume control circuit as a hardware buffer, when the network is abnormally interrupted, the uncompleted data packets will be temporarily stored in the hardware buffer and will continue to be transmitted after the network is restored, thereby avoiding data packet loss caused by network interruption.

[0059] Furthermore, the control module 303 integrates a clock circuit and a storage controller. The clock circuit is used to add timestamps to the parameter data, and the storage controller is used to organize and store the timestamped parameter data in a time sequence.

[0060] It is understandable that the recovery, purification, detection, and recharging of sulfur hexafluoride gas in substations involve the collaborative work of multiple devices. If the data lacks timestamps, the temporal sequence of operations of these devices cannot be reconstructed, thus compromising the traceability of the collected operational data. Therefore, adding timestamps to the collected parameter data allows for the precise recording of the acquisition time of each device's parameters.

[0061] Optionally, the added timestamps can be accurate to the millisecond level.

[0062] In one embodiment, timestamps are combined with encrypted transmission (such as the SM2 algorithm) and device identification codes to form a data trust chain, thereby creating a data anti-tampering system covering the entire data flow cycle from data collection and transmission to storage.

[0063] It is understandable that adding timestamps can be implemented using either a clock circuit or a software timer. A clock circuit has independent hardware resources and does not consume CPU resources, while a software timer relies on CPU clock interrupts and operating system scheduling.

[0064] Optionally, the clock circuit includes a temperature-compensated crystal oscillator with frequency stability better than ±1ppm.

[0065] In one embodiment, the breakpoint resume control circuit relies on timestamps to mark the temporal continuity of data packets, while the ±1ppm accuracy of the clock circuit ensures that the position of the latest valid data can be accurately identified after the transmission is interrupted, avoiding the problem of timestamp jumps caused by system delays when using software timers.

[0066] In one embodiment, the clock signal line is wired with shielded twisted pair cable, forming a Faraday cage structure with the electromagnetic shielding layer of the external protective enclosure 304 to prevent signal coupling noise.

[0067] In one embodiment, the clock circuit also includes a backup power supply so that the clock circuit can continue to operate normally after the main power supply fails.

[0068] Optionally, the storage controller adopts a ring buffer structure, where new data automatically overwrites the oldest stored data to ensure temporal continuity.

[0069] Understandably, traditional linear storage stops recording when the storage space is full, leading to data interruption. Furthermore, it requires manual periodic data export or storage expansion, which is unsuitable for unattended scenarios. A circular buffer structure, however, can always retain the latest time period data, ensuring spatiotemporal continuity. Its automatic overwrite mechanism eliminates manual intervention, and with a fixed capacity, the data time span can be accurately predicted (e.g., 1GB of storage corresponds to 72 hours of recording).

[0070] A circular buffer ensures the temporal continuity of physical storage space, guaranteeing that the storage medium always stores the latest data stream, while a clock circuit adds a precise timestamp to each data packet, thereby establishing a unified time base and preventing logical timing breaks. The two are interconnected through hardware-level synchronization signals, forming a dual "storage-timing" protection system.

[0071] In one embodiment, the storage controller includes a ring address generator and dual-pointer control logic, wherein: the ring address generator uses a modular arithmetic circuit to implement physical address cyclic mapping; the dual-pointer control logic includes a write pointer register (WP) and a read pointer register (RP), the difference between WP and RP is always equal to a preset storage depth N; when WP reaches the end address of the storage, it automatically rolls back to the beginning address and triggers the overwrite enable signal (COV).

[0072] This embodiment of the utility model refines the data transmission module and the control module based on the aforementioned embodiments. By setting a dedicated power grid transmission unit in the data transmission module, encrypted transmission of the collected data is achieved, ensuring data security. By setting a breakpoint resumption control circuit in the data transmission module, interrupted storage and breakpoint resumption during data transmission are achieved, ensuring data integrity. By setting a clock circuit and a storage controller in the control module, the time continuity and traceability of the transmitted data are ensured.

[0073] Figure 4 This is a structural example diagram of a substation sulfur hexafluoride full-process operation data acquisition and transmission device provided for an embodiment of this utility model.

[0074] like Figure 4As shown, the substation sulfur hexafluoride full-process operation data acquisition and transmission device provided in this example includes: a data acquisition module, a data processing and transmission module, and peripheral accessories. The data acquisition module includes: an RS485 interface 401, an RS232 interface 402, a USB interface 403, a network port 404, and a Bluetooth communication module 405. The data processing and transmission module includes: a main control board 406, a power grid transmission module 407, and a touch screen display 408. The peripheral accessories include: a power switch 409, a charging port 410, a battery 411, a handle 412, a front panel 413, an accessory storage box 414, and a protective housing 415.

[0075] It should be noted that the Bluetooth communication module can be configured separately or integrated into the main control board. Figure 4 Taking the integration of the Bluetooth communication module 405 on the main control board 406 as an example.

[0076] The device supports multiple protocol interfaces including RS485, RS232, Bluetooth, and USB, and is compatible with SF6 recovery devices, gas detectors, recovery rate measuring instruments, and other equipment. It also has a built-in adaptive communication protocol parsing function that automatically identifies the device type and configures communication parameters.

[0077] The parameters collected by this device cover:

[0078] 1) Recovery stage: recovered gas volume, gas pressure / temperature, recovery rate;

[0079] 2) Purification stage: purified gas volume, purification rate;

[0080] 3) Testing stage: SF6 purity, impurity content (air, CF4, C2F6, etc.), moisture, acidity, hydrolyzable fluorides and mineral oil indicators;

[0081] 4) Recharge phase: recharge amount and recharge pressure.

[0082] The main control board 406 of the device integrates data storage function and supports local caching; the power network transmission module 407 uploads encrypted data to the power information intranet database in real time through the power network; the touch screen 408 realizes data visualization and remote control of the equipment (issuance of start and stop commands).

[0083] The protective housing 415 of the device is used to protect the internal components and can provide dual protection of waterproofing and electromagnetic shielding, making it suitable for outdoor and strong electromagnetic conditions; the accessory storage box 414 centrally manages accessories such as chargers and connecting cables; the handle 412 facilitates mobile deployment.

[0084] The working principle of this device is as follows:

[0085] 1) Device connection: Connect to field equipment via wired (RS485 / RS232) or Bluetooth.

[0086] 2) Data acquisition: Automatically acquire parameters at each stage, process them on the main control board, and then store and display them.

[0087] 3) Data transmission: After encryption, the data is uploaded to the background database in real time via the power grid transmission module.

[0088] 4) Human-computer interaction: Monitor data or send control commands through the touch screen.

[0089] This device enables digital control of on-site operations throughout the entire process of sulfur hexafluoride gas handling in substations through multi-mode data acquisition and real-time transmission. Typical application scenarios are as follows:

[0090] 1. Gas recovery operation

[0091] The operator connects the recycling and purification unit to this device via an RS485 interface and simultaneously pairs it with the recovery rate measuring instrument via the Bluetooth function of the touchscreen. After issuing a start command on the touchscreen interface, the recycling and purification unit and the recovery rate measuring instrument begin working synchronously. This device collects key parameters such as the pressure, temperature, recovery rate, and gas volume of the recycled gas in real time, and uploads them encrypted to the power information intranet database via a dedicated power grid transmission module, ensuring the integrity and traceability of the recycling process data.

[0092] 2. Gas purification operation

[0093] During the purification process after recycling, this device continuously communicates with the recycling and purification device via the RS485 interface, automatically acquires data such as purified gas volume and purification rate, and uploads them to the background management system in real time to form a visualized monitoring of purification efficiency.

[0094] 3. Gas composition detection

[0095] When performing gas composition detection, operators connect the device to the gas detection instrument via the Bluetooth communication module through the RS232 interface or the touchscreen. The device automatically collects detection data on SF6 purity, moisture content, acidity, and various impurities (such as CF4, C2F6, etc.), and simultaneously transmits the data to the power system's intranet database, providing real-time data for gas quality assessment.

[0096] 4. Gas recharging operation

[0097] During the recharging operation, this device reuses the RS485 interface-connected recycling and purification unit to read parameters such as recharging volume and pressure in real time. Combined with the preset recharging target value, the touch screen can display the progress status, and simultaneously upload the operation log and process parameters in full, realizing closed-loop management of the recharging operation.

[0098] Through the above process, this device upgrades the traditional discrete, manual-dependent operation mode to a centralized data acquisition and automatic reporting digital management mode. Data is seamlessly integrated from field equipment to the back-end system, meeting the needs for visual monitoring of the operation process and providing a real and timely data foundation for the full life cycle management of SF6 gas.

[0099] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A data acquisition and transmission device for the entire process of sulfur hexafluoride (SF6) operation in a substation, characterized in that, include: The data acquisition module integrates a multi-protocol access unit composed of multiple communication protocol interfaces. The multi-protocol access unit is connected to the sulfur hexafluoride gas treatment equipment and detection instruments, and is used to collect parameter data of sulfur hexafluoride gas during the recovery, purification, detection and recharging process. A data transmission module, connected to the data acquisition module, is used to transmit the parameter data to the power system intranet database; The control module is connected to both the data acquisition module and the data transmission module, and is used to control the operation of the data acquisition module and the data transmission module to realize data acquisition and transmission.

2. The substation sulfur hexafluoride full-process operation data acquisition and transmission device according to claim 1, characterized in that, Also includes: The external protective enclosure has a double-layer structure, with an outer waterproof layer and an inner electromagnetic shielding layer, which provides waterproof and electromagnetic shielding protection for the data acquisition module, the data transmission module and the control module.

3. The data acquisition and transmission device for the entire process of sulfur hexafluoride operation in substations according to claim 2, characterized in that, Each communication interface integrated in the multi-protocol access unit integrates an electromagnetic isolation circuit. Each communication interface is fixed to the external protective housing by a conductive rubber ring, forming a continuous conductive path with the electromagnetic shielding layer.

4. The substation sulfur hexafluoride full-process operation data acquisition and transmission device according to claim 2 or 3, characterized in that, The multi-protocol access unit integrates an RS485 interface, an RS232 interface, and a Bluetooth communication module; The RS485 interface uses an optocoupler isolation circuit, the RS232 interface uses a ferrite bead filter circuit and a transient voltage suppression device, and the Bluetooth communication module uses a Class 1 industrial-grade Bluetooth chip.

5. The substation sulfur hexafluoride full-process operation data acquisition and transmission device according to claim 1, characterized in that, The data transmission module integrates a dedicated power network transmission unit, which is used to encrypt and transmit the parameter data to the power system intranet database via the dedicated power network.

6. The substation sulfur hexafluoride full-process operation data acquisition and transmission device according to claim 5, characterized in that, The dedicated power grid transmission unit integrates an SM2 encryption chip, which supports hardware acceleration of national cryptographic algorithms.

7. The substation sulfur hexafluoride full-process operation data acquisition and transmission device according to claim 5 or 6, characterized in that, The data transmission module also integrates a breakpoint resume control circuit, which includes a non-volatile memory for temporary data storage when transmission is interrupted.

8. The substation sulfur hexafluoride full-process operation data acquisition and transmission device according to claim 1, characterized in that, The control module integrates a clock circuit and a storage controller. The clock circuit is used to add timestamps to the parameter data, and the storage controller is used to store the timestamped parameter data.

9. The substation sulfur hexafluoride full-process operation data acquisition and transmission device according to claim 8, characterized in that, The clock circuit includes a temperature-compensated crystal oscillator with frequency stability better than ±1ppm.

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