Substation power utilization system bus short circuit fault discrimination device and identification method thereof

Abstract

The invention discloses a transformer substation power utilization system bus short circuit fault discrimination device and an identification method thereof, and relates to the technical field of circuit fault diagnos.The transformer substation power utilization system bus short circuit fault discrimination device comprises an interface protection device, a sensor, a battery pack and a battery cover plate, a plurality of fixing buckles are fixedly installed on the battery cover plate, and a sealing ring is fixedly installed at the bottom of the battery cover plate; a round hole and a plurality of through holes are formed in the battery cover plate, a pressure relief pipe is fixedly mounted on the round hole, an air release pipe is fixedly mounted on each of the plurality of through holes, and a pressure relief mechanism is mounted in each pressure relief pipe. The internal combustion battery has the advantages that automatic pressure relief, automatic pressure control and automatic volatile gas purification can be performed, air in the battery can be evacuated, oxygen supply can be blocked, the probability of battery explosion can be reduced during internal combustion of the battery, and the internal combustion battery has relatively high safety, environmental protection property and use universality and is relatively high in use safety coefficient.

Description

Technical Field

[0001] This invention relates to the field of circuit fault diagnosis technology, and in particular to a device for identifying short-circuit faults in the busbars of a substation power system and its identification method. Background Technology

[0002] With the continuous growth of social electricity demand and the in-depth advancement of smart grid construction, the structure of substation power systems is becoming increasingly complex, and the power load they bear is constantly increasing. As a key component connecting the various levels of power distribution equipment within the substation and realizing the collection and distribution of power, the operating status of the busbar is of paramount importance. Once a short-circuit fault occurs in the busbar, it will not only instantly cause a sudden drop in voltage and a surge in current in the local power grid, causing overload damage to core power equipment such as transformers and circuit breakers, but may also lead to a rapid expansion of the fault range. Therefore, it is necessary to identify short-circuit faults in the busbar.

[0003] The existing detection method uses the substation integrated automation system. A bus short circuit fault will cause the bus conductor resistance to generate a large amount of Joule heat due to the surge in current, causing the bus temperature to rise rapidly. At this time, the temperature of the electrical components inside the substation integrated automation system will rise sharply, especially the batteries used to supply power inside the substation integrated automation system. High temperature will affect the normal power supply efficiency of the batteries.

[0004] When a violent chemical reaction occurs inside the battery, the internal pressure increases dramatically. If the internal pressure cannot be released in time, the battery may explode, posing a significant safety hazard. Under high temperatures, the battery (lead-acid battery) will release gases containing sulfuric acid, which can damage the cells of the human respiratory system and is harmful to health. The cover cannot effectively handle the released gases, and the released gases will also increase the internal pressure of the battery, which may even cause the battery to bulge.

[0005] Therefore, a novel bus short-circuit fault detection device and identification method for substation power systems can be adopted to address the shortcomings of existing technologies. Summary of the Invention

[0006] The purpose of this invention is to solve the problems of the inability to automatically depressurize and the leakage of volatile gases in the prior art, and to propose a bus short-circuit fault detection device and identification method for substation power supply systems.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A busbar short-circuit fault detection device and identification method for a substation power system includes an interface protection device, a sensor, a battery pack, and a battery cover. Multiple fixing buckles are fixedly installed on the battery cover, a sealing ring is fixedly installed at the bottom of the battery cover, and a circular hole and multiple through holes are opened on the battery cover. A pressure relief pipe is fixedly installed on the circular hole, and a vent pipe is fixedly installed on each of the multiple through holes. A pressure relief mechanism is installed inside the pressure relief pipe. Each of the vent pipes is equipped with a venting mechanism, and the battery cover is equipped with a gas purification mechanism that cooperates with the multiple vent pipes. A dual-axis motor is fixedly installed on the upper part of the battery cover. A protective cover that cooperates with the pressure relief pipe, the vent pipe, and the dual-axis motor is fixedly installed on the battery cover. Two storage slots are opened on the protective cover. Two pads are fixedly installed in each of the two storage slots. A pull handle is rotatably installed between the two cooperating pads.

[0008] In the above-mentioned busbar short-circuit fault detection device and identification method for substation power supply system, the pressure relief mechanism includes a fixed ring, a sliding ring, a fixed support plate 1, a reset spring 1, a sealing plate 1, a fixed support plate 2, a reset spring 2, and a sealing plate 2. A fixed ring is fixedly installed on the pressure relief pipe, a fixed support plate 2 is fixedly installed on the fixed ring, a plurality of reset springs 2 are fixedly installed on the fixed support plate 2, and a sealing plate 2 that cooperates with the fixed ring is fixedly installed on the plurality of reset springs 2. A sliding ring is slidably mounted on the pressure relief pipe, and a fixed support plate is fixedly mounted on the sliding ring. Multiple return springs are fixedly mounted on the fixed support plate, and a sealing plate that cooperates with the sliding ring is fixedly mounted on the multiple return springs. A pushing structure is installed between the dual-shaft motor and the sliding ring.

[0009] In the above-mentioned busbar short-circuit fault detection device and identification method for a substation power system, the pushing structure includes a reciprocating screw, a helical gear, a ball nut, a friction rod, and a helical gear. A helical gear two is fixedly installed on the first drive end of the dual-axis motor, and a reciprocating lead screw two is rotatably installed on the battery cover plate. A helical gear one that meshes with the helical gear two is fixedly installed on the reciprocating lead screw two. A ball nut is fitted onto the reciprocating lead screw, and a friction rod is fixedly mounted on the ball nut. The friction rod is fixedly connected to the sliding ring, and a weightless component is installed between the friction rod and the battery cover.

[0010] In the above-mentioned busbar short-circuit fault detection device and identification method for a substation power system, the weightless component includes a support rod and a friction sleeve. The support rod is fixedly installed on the battery cover plate, and the friction sleeve that cooperates with the friction rod is fixedly installed on the support rod.

[0011] In the above-mentioned busbar short-circuit fault detection device and identification method for substation power system, the venting mechanism includes a limiting sleeve, a limiting rod, an adjusting plate, a sealing plate, a pressure spring, a sealing ring, and a support plate; A support plate and a sealing ring are fixedly installed on the vent pipe. Two limiting sleeves are fixedly installed on the support plate. A limiting rod is slidably installed on each of the two limiting sleeves. An adjusting plate is fixedly installed on both limiting rods. Multiple pressure springs are fixedly installed on the adjusting plate. A sealing plate that cooperates with the sealing ring is fixedly installed on the multiple pressure springs. An adjusting structure is installed between the vent pipe and the adjusting plate.

[0012] In the above-mentioned bus short-circuit fault detection device and identification method for a substation power system, the adjusting structure includes a screw, a nut, a fixed plate, and a fixed sleeve. The fixed sleeve is fixedly installed on the support plate, the nut is fixedly installed on the fixed sleeve, the screw is rotatably installed on the nut, the fixed plate is rotatably installed on the screw, the fixed plate is slidably connected to the vent pipe, and the lower end of the screw abuts against the adjusting plate. A driving structure is installed between the second drive end of the dual-axis motor and one of the screws, and a linkage structure is installed between the multiple screws.

[0013] In the above-mentioned busbar short-circuit fault detection device and identification method for a substation power system, the driving structure includes a gear, a reciprocating lead screw, a ball nut, a push rod, and a rack. A reciprocating lead screw is fixedly installed on the second drive end of the dual-axis motor. A ball nut is fitted onto the reciprocating lead screw. A push rod is fixedly installed on the ball nut. A rack is fixedly installed on the push rod. A gear that meshes with the rack is fixedly installed on one of the lead screws.

[0014] In the above-mentioned bus short-circuit fault detection device and identification method for a substation power system, the linkage structure includes a rotating roller and a track. A rotating roller is fixedly installed on each screw, and a track is shared among multiple rotating rollers.

[0015] In the above-mentioned bus short-circuit fault detection device and identification method for a substation power system, the purification mechanism includes an outlet pipe, a purifier, and an exhaust pipe. The purifier is fixedly installed on the battery cover plate. Each exhaust pipe is connected to the purifier through an outlet pipe. Multiple exhaust pipes are fixedly connected to the purifier.

[0016] Compared with existing technologies, the advantages of this invention are: 1. This invention can automatically regulate the internal pressure of the battery according to the actual situation of the battery, ensuring that the internal pressure of the battery is controlled within the standard range, reducing the probability of the battery bulging due to excessive pressure, effectively improving the safety of the battery, and also extending the service life of the battery.

[0017] 2. This invention can not only automatically regulate the internal pressure of the battery, but also automatically release the internal pressure of the battery, thereby reducing the probability of explosion after battery damage, further improving battery safety, and expanding the application range of the battery.

[0018] 3. This invention can not only perform automatic pressure control and automatic pressure relief operations, but also absorb and release harmful substances volatilized from inside the battery, reducing the probability of harmful substances being inhaled by the human body, reducing harm to the body, reducing the emission of harmful substances, making it more environmentally friendly and safer to use.

[0019] 4. This invention can not only automatically depressurize, automatically control pressure, and automatically purify volatile gases, but also evacuate the air inside the battery during internal combustion, blocking the oxygen supply and shortening the internal combustion time, thereby controlling the fire source. It can effectively reduce the probability of violent combustion after battery damage, and further improve safety.

[0020] In summary, this invention can automatically depressurize, automatically control pressure, and automatically purify volatile gases. When the battery is in internal combustion, it can evacuate the air inside the battery, block the oxygen supply, and reduce the probability of battery explosion. It has high safety, environmental friendliness, and wide applicability, and has a higher safety factor. Attached Figure Description

[0021] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the structure of a bus short-circuit fault detection device and identification method for a substation power system proposed in this invention; Figure 2 for Figure 1 Detailed schematic diagram of the structure with the protective cover removed; Figure 3 for Figure 1 Detailed schematic diagram of the explosion structure; Figure 4 for Figure 3 Enlarged schematic diagram of the pressure relief pipe and its internal components; Figure 5 for Figure 3 Enlarged schematic diagram of the pressure relief pipe and its surrounding components; Figure 6 for Figure 2 Enlarged schematic diagram of the central vent pipe and its surrounding components; Figure 7 for Figure 6 Enlarged schematic diagram of the transfer roller and track; Figure 8 for Figure 6 Detailed cross-sectional view of the enlarged structure of the central vent pipe; Figure 9 for Figure 6 Detailed schematic diagram of the exploded structure of the central vent pipe; Figure 10 for Figure 6 Enlarged schematic diagram of the dual-axis motor and its surrounding components; Figure 11 This is a detailed schematic diagram of the external structure of a substation integrated automation system.

[0022] In the diagram: 1 Battery cover, 2 Fixing buckle, 3 Protective cover, 4 Sealing ring, 5 Pull handle, 6 Vent pipe, 7 Purifier, 8 Vent pipe, 9 Exhaust pipe, 10 Track, 11 Roller, 12 Gear, 13 Pressure relief pipe, 14 Fixed ring, 15 Sliding ring, 16 Fixed support plate one, 17 Return spring one, 18 Sealing plate one, 19 Fixed support plate two, 20 Return spring two, 21 Sealing plate two, 22 Nut, 23 Rack, 24 Dual-axis motor, 25 Reciprocating screw one, 26 Ball nut one, 27 Push rod, 28 Fixed plate, 29 Limit sleeve, 30 Limit rod, 31 Adjusting plate, 32 Sealing plate, 33 Compression spring, 34 Sealing ring, 35 Support plate, 36 Fixed sleeve, 37 Reciprocating screw two, 38 Helical gear one, 39 Ball nut two, 40 Friction rod, 41 Support rod, 42 Friction sleeve. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] Reference Figures 2-6 , Figure 10A bus short-circuit fault detection device and identification method for a substation power system includes an interface protection device, a sensor, a battery pack and a battery cover 1. Multiple fixing buckles 2 are fixedly installed on the battery cover 1, a sealing ring 4 is fixedly installed at the bottom of the battery cover 1, a round hole and multiple through holes are opened on the battery cover 1, a pressure relief pipe 13 is fixedly installed on the round hole, and a vent pipe 6 is fixedly installed on each of the multiple through holes. A pressure relief mechanism is installed inside the pressure relief pipe 13. The purpose of the fixing buckle 2 is to facilitate the connection between the battery cover 1 and the battery casing.

[0025] The function of the sealing ring 4 is to improve the sealing performance of the battery cover 1.

[0026] The pressure relief mechanism includes a fixed ring 14, a sliding ring 15, a fixed support plate 16, a return spring 17, a sealing plate 18, a fixed support plate 29, a return spring 20, and a sealing plate 21. A fixed ring 14 is fixedly installed on the pressure relief pipe 13. A fixed support plate 2 19 is fixedly installed on the fixed ring 14. Multiple reset springs 20 are fixedly installed on the fixed support plate 2 19. A sealing plate 21 that cooperates with the fixed ring 14 is fixedly installed on the multiple reset springs 20. A sliding ring 15 is slidably mounted on the pressure relief pipe 13. A fixed support plate 16 is fixedly mounted on the sliding ring 15. Multiple return springs 17 are fixedly mounted on the fixed support plate 16. A sealing plate 18 that cooperates with the sliding ring 15 is fixedly mounted on the multiple return springs 17. A push structure is installed between the dual-shaft motor 24 and the sliding ring 15. When the internal pressure of the battery increases, it will press against the sealing plate 18 and the sealing plate 21, causing the sealing plate 18 and the sealing plate 21 to separate from the corresponding fixed ring 14 and sliding ring 15 respectively, thereby relieving the internal pressure of the battery. Reducing the internal pressure of the battery lowers the probability of explosion after battery damage, further improving battery safety and expanding the range of applications for the battery.

[0027] The driving structure includes a reciprocating lead screw 37, a helical gear 38, a ball nut 39, a friction rod 40, and a helical gear 2; A helical gear 2 is fixedly installed on the first drive end of the dual-shaft motor 24, and a reciprocating screw 2 37 is rotatably installed on the battery cover plate 1. A helical gear 1 38 that meshes with the helical gear 2 is fixedly installed on the reciprocating screw 2 37. A ball nut 39 is fitted onto the reciprocating lead screw 37. A friction rod 40 is fixedly installed on the ball nut 39. The friction rod 40 is fixedly connected to the sliding ring 15. A weightless component is installed between the friction rod 40 and the battery cover plate 1. The rotation of the first drive end of the dual-shaft motor 24 drives the rotation of the second helical gear, which in turn drives the rotation of the first helical gear 38 meshing with the second helical gear. The rotation of the first helical gear 38 drives the rotation of the second reciprocating screw 37, which causes the second ball nut 39 to reciprocate on the second reciprocating screw 37. The movement causes the sliding ring 15 to move up and down through the friction rod 40. The upward movement of the sliding ring 15 reduces the pressure between the sliding ring 15 and the fixed ring 14. At this time, the second sealing plate 21 will separate from the fixed ring 14, drawing air from inside the battery into the pressure relief pipe 13. Then, the downward movement of the sliding ring 15 compresses the space between the fixed ring 14 and the sliding ring 15, causing the pressure in this area to increase. This causes the first sealing plate 18 to separate from the sliding ring 15, releasing the air in this area. When the battery is in internal combustion, the air inside the battery can be evacuated, blocking the oxygen supply and shortening the combustion time, thereby controlling the fire source. This can effectively reduce the probability of violent combustion after battery damage, further improving safety.

[0028] The weightless components include a support rod 41 and a friction sleeve 42. The support rod 41 is fixedly installed on the battery cover plate 1, and the friction sleeve 42 that cooperates with the friction rod 40 is fixedly installed on the support rod 41. The movement of the friction rod 40 will generate sliding friction between it and the friction sleeve 42. This friction is relatively large and can meet the pressure and force borne by the ball nut 39. This can prevent the ball nut 39 from sliding down automatically under the action of gravity and improve the stability of the fit between the ball nut 39 and the reciprocating screw 37.

[0029] Reference Figures 1-3 , Figures 5-9 Each vent pipe 6 is equipped with a venting mechanism; The venting mechanism includes a limiting sleeve 29, a limiting rod 30, an adjusting disc 31, a sealing disc 32, a pressure spring 33, a sealing ring 34, and a support plate 35; A support plate 35 and a sealing ring 34 are fixedly installed on the vent pipe 6. Two limit sleeves 29 are fixedly installed on the support plate 35. A limit rod 30 is slidably installed on each of the two limit sleeves 29. An adjustment plate 31 is fixedly installed on both limit rods 30. Multiple pressure springs 33 are fixedly installed on the adjustment plate 31. A sealing plate 32 that cooperates with the sealing ring 34 is fixedly installed on the multiple pressure springs 33. An adjustment structure is installed between the vent pipe 6 and the adjustment plate 31. When the gas inside the battery evaporates, the internal pressure of the battery increases. The increased pressure is less than the elastic force of the return spring 20, so the gas will not be discharged from the pressure relief pipe 13. The pressure will push the sealing disc 32 to separate it from the sealing ring 34. At this time, the gas will enter the vent pipe 6 to release the gas, regulate the internal pressure of the battery, and reduce the probability of battery bulging.

[0030] The adjustment structure includes a screw, a nut 22, a fixed plate 28, and a fixed sleeve 36. The fixed sleeve 36 is fixedly installed on the support plate 35, and the nut 22 is fixedly installed on the fixed sleeve 36. The screw is rotatably installed on the nut 22, and the fixed plate 28 is rotatably installed on the screw. The fixed plate 28 is slidably connected to the vent pipe 6, and the lower end of the screw abuts against the adjustment plate 31. When the screw rotates, it moves on the nut 22 under the action of the nut 22. The movement will press against the position of the adjusting plate 31, thereby changing the shortening of the pressure spring 33 and adjusting the elastic force of the pressure spring 33. This allows for automatic balance adjustment of the internal pressure of the battery based on temperature and gas evaporation.

[0031] A driving structure is installed between the second drive end of the dual-shaft motor 24 and one of the screws, and a linkage structure is installed between the multiple screws; The drive structure includes gear 12, reciprocating lead screw 25, ball nut 26, push rod 27, and rack 23; A reciprocating lead screw 25 is fixedly installed on the second drive end of the dual-shaft motor 24. A ball nut 26 is fitted on the reciprocating lead screw 25. A push rod 27 is fixedly installed on the ball nut 26. A rack 23 is fixedly installed on the push rod 27. A gear 12 that meshes with the rack 23 is fixedly installed on one of the screws. The rotation of the second drive end of the dual-axis motor 24 drives the reciprocating screw 25 to rotate, causing the ball nut 26 to reciprocate on the reciprocating screw 25. The push rod 27 drives the rack 23 to move, and the movement of the rack 23 drives the gear 12 to rotate (the width of the rack 23 is greater than the width of the gear 12, and the gear 12 can still mesh with the rack 23 within a certain range of movement). The rotation of the gear 12 drives the screw to rotate, and the elastic force of the pressure spring 33 is adjusted through the above adjustment structure.

[0032] The linkage structure includes a rotating roller 11 and a track 10. A rotating roller 11 is fixedly installed on each screw, and a track 10 is sleeved together among multiple rotating rollers 11. One of the screws rotates, which drives the roller 11 on the screw to rotate. The roller 11 rotates, which drives the track 10 to rotate, thereby driving multiple screws to rotate simultaneously. This achieves the purpose of moving and adjusting multiple adjustment discs 31 at the same time, resulting in fast adjustment speed, automated adjustment, and high efficiency.

[0033] Reference Figure 2 , Figure 3 A gas purification mechanism that works in conjunction with multiple vent pipes 6 is installed on the battery cover 1. The purification mechanism includes an air outlet pipe 8, a purifier 7, and an exhaust pipe 9. The purifier 7 is fixedly installed on the battery cover plate 1. Each vent pipe 6 is connected to the purifier 7 through the air outlet pipe 8. Multiple exhaust pipes 9 are fixedly connected to the purifier 7. The volatile gas enters the vent pipe 6, then enters the purifier 7 through the outlet pipe 8, and is discharged through the exhaust pipe 9 after being purified by the purifier 7. It reduces the probability of harmful substances being inhaled by the human body, reduces damage to the body, reduces the emission of harmful substances, and is more environmentally friendly and safer to use.

[0034] Reference Figure 1 , Figure 3 as well as Figure 11 A dual-axis motor 24 is fixedly installed on the upper part of the battery cover plate 1. A protective cover 3 that cooperates with the pressure relief pipe 13, the vent pipe 6 and the dual-axis motor 24 is fixedly installed on the battery cover plate 1. Two storage slots are opened on the protective cover 3. Two pads are fixedly installed in each of the two storage slots. A pull handle 5 is installed between the two cooperating pads. The protective cover 3 is used to protect the dual-axis motor 24, the pressure relief pipe 13 and the vent pipe 6. The protective cover 3 has heat dissipation holes to allow the dual-axis motor 24 to dissipate heat.

[0035] The purpose of the handle 5 is to facilitate lifting the battery cover 1. The purpose of the storage slot is to store the handle 5, prevent the handle 5 from being exposed, reduce the space occupied, reduce the overall volume, and also to store and protect the handle 5.

[0036] Figure 11 This application is for integrated equipment of a substation integrated automation system. The interface protection device, sensor and battery pack are all existing equipment inside the substation integrated automation system. This application does not show their specific structure and operation method. Battery cover 1 is a component on the battery pack used to seal the battery. Battery cover 1 mainly protects the battery. The identification of short circuit faults on the bus of the substation power system requires the simultaneous operation of multiple devices. This application only shows one of the battery packs among the many devices, which makes it easier to intuitively show the protection point of this application.

[0037] The specific operating steps of this invention are as follows: The substation integrated automation system uses interface protection devices and sensors to collect bus current, voltage, temperature, arc flash, and ambient temperature and humidity in real time to ensure the capture of fault-related data. Cleaning data removes errors, correlates electrical and non-electrical quantities to see if they match fault characteristics, and uses AI models to compare waveforms and calculate probabilities in complex scenarios to distinguish normal, fault, and interference signals. If a short circuit occurs in the busbar, the temperature will rise rapidly, causing the internal temperature of the substation integrated automation system to rise. At this time, it is necessary to protect the battery pack inside the substation integrated automation system. The rise in battery pack temperature will cause the internal pressure of the battery to increase and the gas inside the battery to evaporate and expand. The following methods are used to adjust it. Pressure relief: When the internal pressure of the battery increases, it will press against the sealing plate 18 and the sealing plate 21. At this time, the sealing plate 18 and the sealing plate 21 will separate from the corresponding fixed ring 14 and sliding ring 15 respectively, thereby relieving the internal pressure of the battery.

[0038] Air extraction: The first drive end of the dual-shaft motor 24 rotates, driving the second helical gear to rotate, which in turn drives the first helical gear 38 meshing with the second helical gear to rotate. The rotation of the first helical gear 38 drives the second reciprocating screw 37 to rotate, causing the second ball nut 39 to reciprocate on the second reciprocating screw 37. This movement drives the sliding ring 15 to move up and down through the friction rod 40. The upward movement of the sliding ring 15 reduces the pressure between the sliding ring 15 and the fixed ring 14. At this time, the second sealing plate 21 will separate from the fixed ring 14, drawing air from inside the battery into the pressure relief pipe 13. Then, the sliding ring 15 moves downward, compressing the space between the fixed ring 14 and the sliding ring 15, causing the pressure in this area to increase. This causes the first sealing plate 18 to separate from the sliding ring 15, releasing the air in this area. The movement of the friction rod 40 will generate sliding friction between it and the friction sleeve 42. This friction is relatively large and can meet the pressure and force borne by the ball nut 39. This can prevent the ball nut 39 from sliding down automatically under the action of gravity and improve the stability of the fit between the ball nut 39 and the reciprocating screw 37.

[0039] Gas purification: When the gas inside the battery evaporates, the internal pressure of the battery will increase. The increased pressure is less than the elastic force of the return spring 20, so the gas will not be discharged from the pressure relief pipe 13. The pressure will push the sealing disc 32 to separate the sealing disc 32 from the sealing ring 34, at which point the gas will enter the vent pipe 6 for gas release. The volatile gas enters the vent pipe 6, then enters the purifier 7 through the outlet pipe 8, and is discharged through the exhaust pipe 9 after being purified by the purifier 7. According to the temperature-controlled pressure relief limit: the second drive end of the dual-shaft motor 24 rotates, driving the reciprocating screw 25 to rotate, causing the ball nut 26 to reciprocate on the reciprocating screw 25. This movement is driven by the push rod 27 to move the rack 23, which in turn drives the gear 12 to rotate (the width of the rack 23 is greater than the width of the gear 12, so the gear 12 can still mesh with the rack 23 within a certain range). The rotation of the gear 12 drives the screw to rotate, and the elastic force of the pressure spring 33 is adjusted through the above adjustment structure. One of the screws rotates, causing the roller 11 on the screw to rotate. The rotation of the roller 11 causes the track 10 to rotate, thereby causing multiple screws to rotate simultaneously, so as to achieve the purpose of simultaneous movement and adjustment of multiple adjustment discs 31.

[0040] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A bus short-circuit fault detection device for a substation power supply system, comprising an interface protection device, a sensor, a battery pack, and a battery cover (1), characterized in that, Multiple fixing buckles (2) are fixedly installed on the battery cover (1), a sealing ring (4) is fixedly installed at the bottom of the battery cover (1), a round hole and multiple through holes are opened on the battery cover (1), a pressure relief pipe (13) is fixedly installed on the round hole, a vent pipe (6) is fixedly installed on each of the multiple through holes, and a pressure relief mechanism is installed inside the pressure relief pipe (13). Each of the vent pipes (6) is equipped with a venting mechanism, and the battery cover plate (1) is equipped with a gas purification mechanism that cooperates with the multiple vent pipes (6). A dual-axis motor (24) is fixedly installed on the upper part of the battery cover (1). A protective cover (3) that cooperates with the pressure relief pipe (13), the vent pipe (6) and the dual-axis motor (24) is fixedly installed on the battery cover (1). Two storage slots are opened on the protective cover (3). Two pads are fixedly installed in each of the two storage slots. A pull handle (5) is rotatably installed between the two cooperating pads.

2. The bus short-circuit fault detection device for a substation power supply system according to claim 1, characterized in that, The pressure relief mechanism includes a fixed ring (14), a sliding ring (15), a fixed support plate (16), a return spring (17), a sealing plate (18), a fixed support plate (29), a return spring (20), and a sealing plate (21). A fixed ring (14) is fixedly installed on the pressure relief pipe (13), a fixed support plate (19) is fixedly installed on the fixed ring (14), a plurality of reset springs (20) are fixedly installed on the fixed support plate (19), and a sealing plate (21) that cooperates with the fixed ring (14) is fixedly installed on the plurality of reset springs (20). A sliding ring (15) is slidably mounted on the pressure relief pipe (13). A fixed support plate (16) is fixedly mounted on the sliding ring (15). Multiple reset springs (17) are fixedly mounted on the fixed support plate (16). A sealing plate (18) that cooperates with the sliding ring (15) is fixedly mounted on the multiple reset springs (17). A pushing structure is installed between the dual-shaft motor (24) and the sliding ring (15).

3. The bus short-circuit fault detection device for a substation power supply system according to claim 2, characterized in that, The pushing structure includes a reciprocating lead screw (37), a helical gear (38), a ball nut (39), a friction rod (40), and a helical gear. The first drive end of the dual-axis motor (24) is fixedly equipped with a helical gear II, and the battery cover plate (1) is rotatably equipped with a reciprocating screw II (37), and the reciprocating screw II (37) is fixedly equipped with a helical gear I (38) that meshes with the helical gear II. A ball nut (39) is fitted on the reciprocating screw (37), and a friction rod (40) is fixedly installed on the ball nut (39). The friction rod (40) is fixedly connected to the sliding ring (15), and a weightless component is installed between the friction rod (40) and the battery cover (1).

4. The bus short-circuit fault detection device for a substation power supply system according to claim 3, characterized in that, The weightless component includes a support rod (41) and a friction sleeve (42). The support rod (41) is fixedly installed on the battery cover plate (1), and the friction sleeve (42) that cooperates with the friction rod (40) is fixedly installed on the support rod (41).

5. The bus short-circuit fault detection device for a substation power supply system according to claim 1, characterized in that, The venting mechanism includes a limiting sleeve (29), a limiting rod (30), an adjusting disc (31), a sealing disc (32), a pressure spring (33), a sealing ring (34), and a support plate (35). A support plate (35) and a sealing ring (34) are fixedly installed on the vent pipe (6). Two limiting sleeves (29) are fixedly installed on the support plate (35). A limiting rod (30) is slidably installed on each of the two limiting sleeves (29). An adjusting plate (31) is fixedly installed on both of the two limiting rods (30). Multiple pressure springs (33) are fixedly installed on the adjusting plate (31). A sealing plate (32) that cooperates with the sealing ring (34) is fixedly installed on the multiple pressure springs (33). An adjusting structure is installed between the vent pipe (6) and the adjusting plate (31).

6. The bus short-circuit fault detection device for a substation power supply system according to claim 5, characterized in that, The adjustment structure includes a screw, a nut (22), a fixed plate (28), and a fixed sleeve (36). The fixed sleeve (36) is fixedly installed on the support plate (35). The nut (22) is fixedly installed on the fixed sleeve (36). The screw is rotatably installed on the nut (22). The fixed plate (28) is rotatably installed on the screw. The fixed plate (28) is slidably connected to the vent pipe (6). The lower end of the screw abuts against the adjustment plate (31). The second drive end of the dual-axis motor (24) is equipped with a driving structure between it and one of the screws, and a linkage structure is installed between the multiple screws.

7. A bus short-circuit fault detection device for a substation power supply system according to claim 6, characterized in that, The drive structure includes a gear (12), a reciprocating lead screw (25), a ball nut (26), a push rod (27), and a rack (23). A reciprocating screw (25) is fixedly installed on the second drive end of the dual-axis motor (24). A ball nut (26) is fitted on the reciprocating screw (25). A push rod (27) is fixedly installed on the ball nut (26). A rack (23) is fixedly installed on the push rod (27). A gear (12) that meshes with the rack (23) is fixedly installed on one of the screws.

8. A bus short-circuit fault detection device for a substation power supply system according to claim 6, characterized in that, The linkage structure includes a rotating roller (11) and a track (10). A rotating roller (11) is fixedly installed on each screw, and a track (10) is fitted together among multiple rotating rollers (11).

9. A busbar short-circuit fault detection device for a substation power supply system according to claim 1, characterized in that, The purification mechanism includes an air outlet pipe (8), a purifier (7) and an exhaust pipe (9). The purifier (7) is fixedly installed on the battery cover plate (1). Each of the exhaust pipes (6) and the purifier (7) are connected through the air outlet pipe (8). Multiple exhaust pipes (9) are fixedly connected to the purifier (7).

10. A method for identifying bus short-circuit faults in a substation power supply system, used in the substation power supply system bus short-circuit fault identification device as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. The substation integrated automation system uses interface protection devices and sensors to collect electrical quantities such as bus current and voltage, non-electrical quantities such as temperature and arcing, and ambient temperature and humidity in real time to ensure the capture of fault-related data. S2. Clean the data to remove errors, correlate electrical and non-electrical quantities to see if they match fault characteristics, and use AI models to compare waveforms and calculate probabilities in complex scenarios to distinguish normal, fault, and interference signals. S3. Once a short circuit occurs on the busbar, the temperature will rise rapidly, which will cause the internal temperature of the substation integrated automation system to rise. At this time, it is necessary to protect the battery pack inside the substation integrated automation system. The rise in battery pack temperature will cause the internal pressure of the battery to increase and the gas inside the battery to evaporate and expand. S4. Pressure relief: When the internal pressure of the battery increases, a pressure relief mechanism is used to relieve the internal pressure of the battery. Air extraction: As the battery temperature rises, the internal chemical reaction of the battery accelerates, and the rate of gas generation is greater than the rate of gas consumption. At this time, a gas venting mechanism is needed to release the gas inside the battery, and a gas purification mechanism is used to remove harmful substances from the gas.

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