A standby power supply for a smart grid substation and a method for activating the same

Abstract

The application relates to the technical field of substation standby power supply, in particular to a standby power supply of an intelligent power grid substation and an enabling method thereof. The standby power supply of the intelligent power grid substation comprises movable contactors connected with different input lines; a moving frame is arranged on the moving frame and is provided with static contactors; a protection piece is arranged on the gate body and can open or block the receiving sleeve; a switching piece is arranged on the mounting frame and can drive the moving frame to move between the multiple gate bodies; and after the movable contactor is aligned with the static contactor, the switching piece can drive the movable contactor to move close to the static contactor; in the process, the sealing plates can be rotated to open the receiving sleeve; when the moving frame is not in abutment with the movable contactor, the movable contactors are located in the receiving sleeve, and the sealing plates are in abutment with each other to seal the movable contactors in the receiving sleeve, so that the oxidation loss of the movable contactors is effectively reduced, external interference such as dust and foreign matters is avoided, and the risk of poor contact between the movable contactors and the static contactors can be avoided.

Description

Technical Field

[0001] This invention relates to the field of substation backup power technology, specifically a backup power supply for a smart grid substation and its activation method. Background Technology

[0002] In the construction and operation of smart grids, substations, as hubs for power transmission, distribution, and control, must maintain uninterrupted 24-hour power supply to critical loads such as internal relay protection devices, automated monitoring systems, emergency lighting, and communication equipment. Automatic transfer switch (ATS) is a crucial safety guarantee for the substation's secondary system. Its core function is to quickly and automatically disconnect the main power supply path and rapidly activate the backup power supply when the main power supply trips or loses power due to a fault, ensuring zero flicker or restoration of power to critical loads within the substation in the shortest possible time, preventing the escalation of grid accidents.

[0003] In typical smart grid substations, the backup power supply is usually housed within a power supply box. By connecting the backup line to the backup switch, the power supply circuit can be switched when the main line fails. This typically includes a switch connected to the main line and a switch connected to the backup line. Each switch is equipped with a moving contact that works with a stationary contact. During switching, the power supply can be freely switched by replacing the moving contact that works with the stationary contact.

[0004] Due to the inherent characteristics of backup power supplies, the circuit breakers connected to the backup lines are typically in a "hot standby" or "cold standby" state (used only when the main power supply line fails, is under maintenance, or malfunctions). This means the moving contacts of the backup line are not energized for extended periods, making their surfaces highly susceptible to chemical reactions with oxygen, moisture, and sulfides in the air, forming oxide or sulfide layers. Simultaneously, dust and metal particles within the substation easily accumulate on the contact surfaces. When power switching is required, these insulating media can cause a sharp increase in contact resistance, leading to overheating, arcing, or even complete loss of conductivity, resulting in backup power supply failure and potentially a major accident. Summary of the Invention

[0005] The purpose of this invention is to provide a backup power supply for a smart grid substation and its activation method, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A backup power supply for a smart grid substation includes a power supply box, on which multiple sets of switches are installed; each of the multiple sets of switches is provided with a moving contact connected to a different input line. It also includes a mounting frame installed on the power supply housing, a slide rail mounted on the mounting frame, a movable frame slidably mounted on the slide rail, and multiple sets of stationary contacts connected to the output lines mounted on the movable frame; The gate body is provided with a protective component, which includes multiple sets of storage sleeves installed on the gate body. Multiple sets of sealing plates are rotatably installed on the storage sleeves and are equidistantly arranged along their circumference. As the moving contact moves closer to or away from the stationary contact along the axial direction of the storage sleeve, the sealing plates can rotate relative to each other to move away from or closer to each other, thereby conducting or blocking the storage sleeve. The mounting frame is provided with a switching component, which can drive the movable frame to slide on the slide rail to move between multiple sets of the gate bodies to switch the moving contact that cooperates with the stationary contact; and after the moving contact is aligned with the stationary contact, the switching component can drive the moving contact to move closer to the stationary contact. During this process, the sealing plate can rotate to conduct the receiving sleeve.

[0008] The backup power supply for the smart grid substation as described above: the protective component also includes a rotating sleeve rotatably mounted on the receiving sleeve, the rotating sleeve having multiple sets of sealing grooves engaged; the sealing plate is equipped with a sliding column that slidably engages with the sealing grooves.

[0009] As described above, the backup power supply for a smart grid substation includes: a protective component further comprising a top rod fitted inside the receiving sleeve, with multiple sets of top rods connected by a connecting plate; a moving contact connected to the top rod via a buffer component; a driving sleeve slidably connected to the receiving sleeve mounted on the top rod, and a pressing plate mounted on the driving sleeve; a sliding sleeve slidably fitted onto the receiving sleeve and engaging with the rotating sleeve, and a protruding post mounted on the sliding sleeve; a rotating groove slidably fitted onto the rotating sleeve and engaging with the protruding post; a baffle plate cooperating with the pressing plate mounted on the sliding sleeve; and an extension spring fitted onto the receiving sleeve, with both ends of the extension spring abutting against the baffle plate and the driving sleeve, respectively.

[0010] The backup power supply of the smart grid substation as described above: the buffer component includes a buffer sleeve installed on the top rod, the moving contact is slidably engaged with the buffer sleeve, and a buffer spring is provided inside the buffer sleeve, with the two ends of the buffer spring abutting against the moving contact and the buffer sleeve respectively.

[0011] The backup power supply of the smart grid substation as described above: a tripping spring is sleeved on the top rod, and the two ends of the tripping spring abut against the gate body and the connecting plate respectively.

[0012] The backup power supply for the smart grid substation as described above includes: a switching component comprising a motor mounted on the mounting frame, with a lead screw mounted on the output end of the motor; a column slidably connected to the lead screw mounted on the movable frame; multiple sets of threaded sleeves threadedly connected to the lead screw, with the multiple sets of threaded sleeves respectively disposed on both sides of the column; and multiple sets of timing springs sleeved on the lead screw, with the two ends of the multiple sets of timing springs respectively abutting against the threaded sleeves and the column.

[0013] As described above, in the backup power supply of the smart grid substation: when the stationary contact is aligned with the moving contact, the movable frame slides to the end of the slide rail.

[0014] The backup power supply of the smart grid substation as described above includes: the switching component further includes an extrusion plate installed on the threaded sleeve; a lifting frame is slidably fitted on the column; a wedge block that cooperates with the extrusion plate and a top plate that compresses with the connecting plate are installed on the lifting frame; a return spring is sleeved on the column, and the two ends of the return spring abut against the moving frame and the lifting frame, respectively.

[0015] As described above, the backup power supply of the smart grid substation: when the extrusion plate extrudes the wedge, it can drive the lifting frame to slide upward along the axial direction of the column, thereby driving the connecting plate to slide upward through the top plate.

[0016] A method for activating a backup power supply in a smart grid substation as described above includes the following steps: Step 1: Fault Response; When the main power supply line fails, the contact between the moving contact and the stationary contact on the main power supply line is disconnected by the switching device; after disconnection, the moving contact on the main power supply line retracts into the receiving sleeve. After retraction, the receiving sleeve is sealed by the protective device to prevent the exposed live contacts from causing arcing short circuits or the intrusion of external foreign objects, and to ensure physical insulation safety after power failure. Step 2: Lateral switching and alignment; the stationary contact is moved by the switching component to align with the moving contact on the backup power supply. At this time, the moving frame slides to the end of the slide rail. Step 3: Vertical lifting; the moving contact on the backup power supply is brought closer to the stationary contact by the switching component. During this process, the protective component on the switch body connected to the backup power supply can conduct through the receiving sleeve, thereby forming a conductive channel for the moving contact to pass through, so as to eliminate physical obstruction during the closing process. Step 4: Contact closure and power supply; The push rod continues to move upward, and through the buffer, the moving contact passes through the opened storage sleeve and makes elastic contact with the stationary contact. The buffer spring absorbs the impact and completes the circuit conduction, and the backup power supply is put into use.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. When the moving frame is not in contact with the moving contact, the moving contact is located inside the storage sleeve, and the sealing plates abut against each other to seal the moving contact inside the storage sleeve. This can effectively reduce the oxidation loss of the moving contact and prevent external interference such as dust and foreign objects from causing accidental conduction between the moving contact and the stationary contact, thus avoiding electrical accidents. It can also effectively avoid the risk of poor contact between the moving contact and the stationary contact. 2. Utilizing the energy storage and release characteristics of symmetrical sequential springs, a shock-free buffering and bidirectional self-resetting process is achieved during switching, effectively eliminating transmission backlash and ensuring electrical isolation safety and mechanical reliability during multi-power supply switching. Furthermore, when the motor stops, the moving frame is locked in position via a threaded connection, maintaining contact between the moving and stationary contacts, eliminating unnecessary energy consumption and the risk of accidental tripping due to power failure. It can also withstand the continuous micro-vibrations common in substation environments (noise caused by the operation of large transformers and adjacent switch operations) and metal thermal expansion and contraction deformation caused by environmental temperature differences, preventing a drop in contact pressure due to slight slippage / settlement of the moving frame. This fundamentally avoids the vicious cycle of increased contact resistance → contact surface heating and oxidation → ablation and arcing. 3. The switching mechanism moves the mobile frame between two gates to switch between different stationary contacts and different lines to form a complete power supply circuit. This eliminates the complexity of configuring multiple independent output mechanisms for multiple power sources, resulting in a compact structure that significantly saves substation space and manufacturing costs. The mobile frame can only align with one gate at a time, ensuring that the stationary contact is in contact with the moving contact of only one power source at any given time. This physically eliminates the risk of multiple power sources operating in parallel or backfeeding, meeting the stringent "five-proof" requirements of the power system. The entire lateral switching process is driven by a motor, requiring no manual intervention. It features fast response speed and high action certainty, effectively improving the automation level of backup power supply switching. Attached Figure Description

[0018] Figure 1 A schematic diagram of the backup power supply structure for a smart grid substation; Figure 2 A schematic diagram of the installation frame in the backup power supply of a smart grid substation; Figure 3 for Figure 2 Another structural diagram from a different perspective; Figure 4 A schematic diagram of the moving frame structure in the backup power supply of a smart grid substation; Figure 5 A schematic diagram of the switching component in the backup power supply of a smart grid substation; Figure 6 This is a schematic diagram of the structure of the gate in the backup power supply of a smart grid substation. Figure 7 A schematic diagram of the structure of the sleeve in the backup power supply of a smart grid substation; Figure 8 A schematic diagram of a spring extending from the backup power supply in a smart grid substation; Figure 9 for Figure 8 Schematic diagram of the structure at point A; Figure 10 This is a schematic diagram of the sealing plate in the backup power supply of a smart grid substation.

[0019] In the diagram: 1. Power supply enclosure; 2. Gate body; 3. Mounting frame; 301, slide rail; 4. Moving frame; 401. Static contact; 402. Column; 5. Storage sleeve; 6. Rotate the sleeve; 601. Seal the inclined groove; 602. Rotate the inclined groove; 7. Sealing plate; 701. Sliding column; 8. Sliding sleeve; 801. Protruding post; 802. Baffle; 9. Extend the spring; 10. Top rod; 1001. Connecting plate; 11. Drive sleeve; 1101. Pressing plate; 12. Buffer sleeve; 13. Buffer spring; 14. Moving contact; 15. Opening spring; 16. Electric motor; 17. Lead screw; 18. Threaded sleeve; 1801. Extrusion plate; 19. Timing springs; 20. Lifting frame; 2001. Wedge block; 2002. Top plate; 21. Return spring. Detailed Implementation

[0020] 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0022] Please see Figure 1-10 As an embodiment of the present invention, the backup power supply of the smart grid substation includes a power supply box 1, on which multiple sets of gates 2 are installed; each of the multiple sets of gates 2 is provided with a moving contact 14 connected to different input lines. It also includes a mounting frame 3 installed on the power supply box 1, a slide rail 301 installed on the mounting frame 3, a movable frame 4 slidably installed on the slide rail 301, and a plurality of static contacts 401 connected to the output lines installed on the movable frame 4; The gate body 2 is provided with a protective component, which includes multiple sets of storage sleeves 5 installed on the gate body 2. Multiple sets of sealing plates 7 are rotatably installed on the storage sleeves 5 and are equidistantly arranged along their circumference. As the moving contact 14 moves closer to or away from the stationary contact 401 along the axial direction of the storage sleeve 5, the sealing plates 7 can rotate relative to each other to move away from or closer to each other, thereby conducting or blocking the storage sleeve 5. The mounting frame 3 is provided with a switching component, which can drive the movable frame 4 to slide on the slide rail 301 to move between multiple sets of the gate bodies 2 to switch the moving contact 14 that cooperates with the stationary contact 401; and after the moving contact 14 is aligned with the stationary contact 401, the switching component can drive the moving contact 14 to move closer to the stationary contact 401. During this process, the sealing plate 7 can rotate to conduct the receiving sleeve 5.

[0023] In this embodiment, when the movable frame 4 is not in contact with the movable contact 14, the movable contact 14 is located inside the receiving sleeve 5, and the sealing plates 7 abut against each other to seal the movable contact 14 inside the receiving sleeve 5. This can effectively reduce the oxidation loss of the movable contact 14 and prevent external interference such as dust and foreign objects from causing accidental conduction between the movable contact 14 and the stationary contact 401, thus avoiding electrical accidents. It can also effectively avoid the risk of poor contact between the movable contact 14 and the stationary contact 401.

[0024] When the main power supply is in operation, the movable frame 4 is positioned above the gate body 2 connected to the main power supply line, and the stationary contact 401 is tightly connected to the moving contact 14 on the gate body 2; at this time, the moving contacts 14 on the gate body 2 on the standby line are all in a sealed state.

[0025] When the main line fails, by controlling the switching mechanism, the moving contact 14 on the main power supply line can be moved away from the stationary contact 401. After the moving contact 14 on this side is retracted into the storage sleeve 5, it is sealed and protected by the protective component. Then, the switching mechanism can move the moving frame 4 on the slide rail 301, thereby moving the stationary contact 401 from the top of the main power supply line's side gate 2 to the top of the backup line's side gate 2. When the moving frame 4 moves to the end of the slide rail 301, the moving frame 4 does not move, and at this time, the stationary contact 401 is aligned with the moving contact 14. Then, the switching mechanism can move the moving contact 14 on this side closer to and abut against the stationary contact 401 to complete the activation of the backup power supply. During the approach process, multiple sets of sealing plates 7 rotate away from each other to conduct through the storage sleeve 5, thereby forming a conductive channel for the moving contact 14 to pass through, so as to eliminate the physical obstruction during the closing process.

[0026] As a further embodiment of the present invention, the protective component also includes a rotating sleeve 6 rotatably mounted on the storage sleeve 5, the rotating sleeve 6 having multiple sets of sealing grooves 601 engaged thereon; and a sliding column 701 slidably engaged with the sealing grooves 601 mounted on the sealing plate 7.

[0027] In this embodiment, when the rotating sleeve 6 rotates, it can drive the sealing groove 601 to rotate; the rotating sealing groove 601 can drive the sealing plate 7 to rotate through the squeezing action of its groove wall on the sliding column 701, and the sliding column 701 slides in the sealing groove 601 during the rotation; when multiple sets of sealing plates 7 rotate away from or approach each other, the conduction area of ​​the receiving sleeve 5 can be gradually increased or decreased, thereby realizing the conduction or closure of the receiving sleeve 5.

[0028] When the movable frame 4 is not in contact with the moving contact 14, the moving contact 14 is located inside the receiving sleeve 5, and the sealing plates 7 abut against each other to seal the moving contact 14 inside the receiving sleeve 5. This can effectively reduce the oxidation loss of the moving contact 14 and prevent external interference such as dust and foreign objects from causing accidental conduction between the moving contact 14 and the stationary contact 401, thus avoiding electrical accidents. It can also effectively avoid the risk of poor contact between the moving contact 14 and the stationary contact 401.

[0029] As a further embodiment of the present invention, the protective component further includes a top rod 10 sleeved within the storage sleeve 5, and multiple sets of top rods 10 are connected by a connecting plate 1001; the moving contact 14 is connected to the top rod 10 via a buffer; a driving sleeve 11 slidably connected to the storage sleeve 5 is mounted on the top rod 10, and a pressing plate 1101 is mounted on the driving sleeve 11; a sliding sleeve 8 slidably fitted onto the storage sleeve 5 and sleeved with the rotating sleeve 6, and a protruding post 801 is mounted on the sliding sleeve 8; a rotating inclined groove 602 is provided on the rotating sleeve 6 and slidably fitted with the protruding post 801; a baffle 802 that cooperates with the pressing plate 1101 is mounted on the sliding sleeve 8; an extension spring 9 is sleeved on the storage sleeve 5, and the two ends of the extension spring 9 abut against the baffle 802 and the driving sleeve 11, respectively.

[0030] In this embodiment, during the closing process (the moving contact 14 is located inside the receiving sleeve 5, and the sealing plates 7 abut against each other to form a sealed environment): when the connecting plate 1001 drives the push rod 10 to move along the axial direction of the receiving sleeve 5 towards the stationary contact 401, the push rod 10 will drive the driving sleeve 11 to move synchronously; and during the movement, the extension spring 9 drives the sliding sleeve 8 to move synchronously (the extension spring 9 has an initial compression amount, and its elasticity is sufficient to overcome the resistance of the sliding sleeve 8 sliding). During the movement of the sliding sleeve 8, the protruding column 801 can squeeze the groove wall of the rotating inclined groove 602, which can drive the rotating sleeve 6 to rotate. During the rotation, the protruding column 801 slides in the rotating inclined groove 602, thereby driving the sealing plates 7 to rotate away from each other, thereby connecting the receiving sleeve 5. During this process, the moving contact 14 still moves inside the receiving sleeve 5.

[0031] When the receiving sleeve 5 is turned on (the protruding post 801 is located at the end of the rotating inclined groove 602, the rotating sleeve 6 cannot rotate, and the sliding sleeve 8 cannot continue to slide), the continuing to move push rod 10 will cause the driving sleeve 11 to compress the extension spring 9, thereby causing the pressing plate 1101 to separate from the baffle 802, the moving contact 14 extends out of the receiving sleeve 5, and gradually approaches and abuts the stationary contact 401, thereby forming a complete power supply circuit; during this process, the sliding sleeve 8 slides inward in the driving sleeve 11.

[0032] The circuit breaker tripping process: The connecting plate 1001 drives the push rod 10 to move away from the stationary contact 401, thereby causing the moving contact 14 to separate from the stationary contact 401; at the same time, the drive sleeve 11 moves synchronously. During this process, the compression of the extended spring 9 gradually recovers, and the pressing plate 1101 gradually approaches the baffle 802. When the moving contact 14 retracts into the storage sleeve 5, the pressing plate 1101 abuts against the baffle 802. The push rod 10, which continues to move, drives the sliding sleeve 8 to move downward through the drive sleeve 11. The rotating sleeve 6 is driven to rotate through the squeezing cooperation between the protruding column 801 and the rotating inclined groove 602, thereby causing the sealing plates 7 to rotate and move closer to each other, thereby resealing the storage sleeve 5 to protect the moving contact 14.

[0033] Because the closing action requires opening the sealing plate 7 first and then extending the moving contact 14, it effectively avoids mechanical jamming of the moving contact 14 due to friction or misalignment when passing through the sealing plate 7. During the opening retraction process, the sealing plate 7 only begins to close after the moving contact 14 is fully retracted into the retractable sleeve 5. This avoids interference, squeezing, or shearing, thereby preventing the contact surface from being scratched, deformed, or even jammed, and eliminating the risk of arcing caused by the separation of the contacts under load, ensuring the safety of the tripping process and the reliability of the seal.

[0034] As a further embodiment of the present invention, the buffer includes a buffer sleeve 12 mounted on the top rod 10, the movable contact 14 is slidably engaged with the buffer sleeve 12, and a buffer spring 13 is provided inside the buffer sleeve 12, with the two ends of the buffer spring 13 abutting against the movable contact 14 and the buffer sleeve 12 respectively.

[0035] In this embodiment, when the moving contact 14 moves toward the stationary contact 401 with the push rod 10 and finally contacts it, the buffer spring 13 can absorb the impact kinetic energy at the moment of contact between the two, preventing contact bounce or mechanical damage caused by rigid collision; at the same time, after the circuit is closed, the continuous preload provided by the buffer spring 13 can ensure that the moving contact 14 and the stationary contact 401 maintain a stable contact pressure, avoiding the increase of contact resistance or the phenomenon of poor connection caused by equipment vibration or thermal expansion and contraction, and significantly improving the electrical stability and mechanical life of the power supply circuit.

[0036] As a further embodiment of the present invention, a gate-opening spring 15 is sleeved on the top rod 10, and the two ends of the gate-opening spring 15 abut against the gate body 2 and the connecting plate 1001 respectively.

[0037] In this embodiment, during the closing process, the connecting plate 1001 drives the top rod 10 to move and compresses the opening spring 15.

[0038] When the switching element loses its driving force, loses power, or malfunctions, the trip spring 15 can release the stored potential energy, automatically push the connecting plate 1001 and the push rod 10 to reset, and forcefully pull the moving contact 14 back into the sleeve 5. This fundamentally avoids the dangerous state caused by the jamming of the drive mechanism and achieves a safe redundancy of self-resetting without human intervention.

[0039] As a further embodiment of the present invention, the switching component includes a motor 16 mounted on the mounting frame 3, and a lead screw 17 mounted on the output end of the motor 16; a column 402 slidably connected to the lead screw 17 is mounted on the moving frame 4, and multiple sets of threaded sleeves 18 are threadedly connected to the lead screw 17, with the multiple sets of threaded sleeves 18 respectively disposed on both sides of the column 402; multiple sets of timing springs 19 are sleeved on the lead screw 17, and the two ends of the multiple sets of timing springs 19 respectively abut against the threaded sleeves 18 and the column 402.

[0040] As a further embodiment of the present invention, when the stationary contact 401 is aligned with the moving contact 14, the moving frame 4 slides to the end of the slide rail 301.

[0041] In this embodiment, the line is in an open circuit state, and the moving frame 4 is located between the two gate bodies 2. At this time, the timing springs 19 on both sides are in a pre-compressed state. The control motor 16 rotates, thereby driving the lead screw 17 to rotate. Through the threaded engagement, the threaded sleeve 18 moves synchronously, and through the timing springs 19, the column 402 moves on the lead screw 17, so as to drive the moving frame 4 to move towards one side of the gate body 2.

[0042] When the moving frame 4 is aligned with the gate body 2 on one side (i.e., the moving frame 4 moves to the end of the slide rail 301), the stationary contact 401 is aligned with the moving contact 14. At this time, the moving frame 4 is limited, while the threaded sleeve 18, which continues to move on one side, compresses the timing spring 19, causing the threaded sleeve 18 to approach the column 402. Meanwhile, the compression of the timing spring 19 on the other side decreases, causing the threaded sleeve 18 to move away from the column 402. During this process, the push rod 10 moves upward to drive the moving contact 14 to abut against the stationary contact 401.

[0043] When switching to the other side of the gate body 2, the motor 16 drives the lead screw 17 to rotate in the opposite direction, thereby driving the threaded sleeve 18 to move in the opposite direction. During this process, the distance between the threaded sleeve 18 and the column 402 is gradually restored, and the timing springs 19 on both sides are also gradually reset. At the same time, under the elastic force of the opening spring 15, the moving contact 14 and the stationary contact 401 complete the opening action.

[0044] By utilizing the energy storage and release characteristics of the symmetrical timing spring 19, shock-free buffering and bidirectional self-resetting during the switching process are achieved, effectively eliminating transmission backlash and ensuring the electrical isolation safety and mechanical reliability of multi-power supply switching. Furthermore, when the motor 16 stops operating, the moving frame 4 is locked in position via a threaded connection, maintaining the contact between the moving contact 14 and the stationary contact 401. This eliminates unnecessary energy consumption and the risk of accidental tripping due to power failure. It also resists the continuous micro-vibrations common in substation environments (noise caused by the operation of large transformers and adjacent switch operations) and metal thermal expansion and contraction deformation caused by environmental temperature differences. This prevents the contact pressure from dropping due to slight slippage / settlement of the moving frame 4, fundamentally avoiding the vicious cycle of increased contact resistance → contact surface heating and oxidation → ablation and arcing.

[0045] As a further embodiment of the present invention, the switching component further includes a pressing plate 1801 installed on the threaded sleeve 18, a lifting frame 20 slidably fitted on the column 402, a wedge block 2001 that cooperates with the pressing plate 1801 and a top plate 2002 that compresses with the connecting plate 1001 installed on the lifting frame 20; a return spring 21 is sleeved on the column 402, and the two ends of the return spring 21 abut against the moving frame 4 and the lifting frame 20 respectively.

[0046] As a further embodiment of the present invention, when the extrusion plate 1801 extrudes the wedge block 2001, it can drive the lifting frame 20 to slide upward along the axial direction of the column 402, thereby driving the connecting plate 1001 to slide upward through the top plate 2002.

[0047] In this embodiment, when the moving frame 4 is limited, as the threaded sleeve 18 approaches the column 402, the squeezing action of the squeezing plate 1801 on the wedge block 2001 can drive the lifting frame 20 to move upward and compress the reset spring 21. During this process, the squeezing action of the top plate 2002 on the connecting plate 1001 can drive the top rod 10 to move synchronously, thereby completing the closing action.

[0048] The switching mechanism drives the moving frame 4 to move between the two gate bodies 2, switching between different stationary contacts 401 to form a complete power supply circuit with different lines. This eliminates the complexity of configuring multiple independent output mechanisms for multiple power sources, resulting in a compact structure that significantly saves substation space and manufacturing costs. The moving frame 4 can only align with one gate body 2 at a time, ensuring that the stationary contact 401 is in contact with the moving contact 14 of only one power source at any given time. This physically eliminates the risk of multiple power sources operating in parallel or backfeeding, meeting the stringent "five-proof" requirements of the power system. The entire lateral switching process is driven by the motor 16, requiring no manual intervention. It features fast response speed and high action certainty, effectively improving the automation level of backup power supply switching.

[0049] A method for activating a backup power supply in a smart grid substation as described above includes the following steps: Step 1: Fault Response; When the main power supply line fails, the contact between the moving contact 14 and the stationary contact 401 on the main power supply line is disconnected by the switching component; after disconnection, the moving contact 14 on the main power supply line retracts into the receiving sleeve 5. After retraction, the receiving sleeve 5 is sealed by the protective component to prevent the exposed live contacts from causing an arc short circuit or the intrusion of external foreign objects, and to ensure physical insulation safety after power failure. Step 2: Lateral switching and alignment; The stationary contact 401 is moved by the switching component to align with the moving contact 14 on the backup power supply. At this time, the moving frame 4 slides to the end of the slide rail 301. Step 3: Vertical lifting; the moving contact 14 on the backup power supply is brought close to the stationary contact 401 by the switching component. During this process, the protective component on the switch body 2 connected to the backup power supply can conduct through the receiving sleeve 5, thereby forming a conductive channel for the moving contact 14 to pass through, so as to eliminate physical obstruction during the closing process. Step 4: Contact closure and power supply; The push rod 10 continues to move upward, and through the buffer, the moving contact 14 passes through the opened storage sleeve 5 and makes elastic contact with the stationary contact 401. The buffer spring 13 absorbs the impact and completes the circuit conduction, and the backup power supply is put into use.

[0050] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0051] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A backup power supply for a smart grid substation, characterized in that, The power supply box includes a power supply enclosure, on which multiple sets of gates are installed; each set of gates is provided with a moving contact that is connected to different input lines. It also includes a mounting frame installed on the power supply housing, a slide rail mounted on the mounting frame, a movable frame slidably mounted on the slide rail, and multiple sets of stationary contacts connected to the output lines mounted on the movable frame; The gate body is provided with a protective component, which includes multiple sets of storage sleeves installed on the gate body. Multiple sets of sealing plates are rotatably installed on the storage sleeves and are equidistantly arranged along their circumference. As the moving contact moves closer to or away from the stationary contact along the axial direction of the storage sleeve, the sealing plates can rotate relative to each other to move away from or closer to each other, thereby conducting or blocking the storage sleeve. The mounting frame is provided with a switching component, which can drive the movable frame to slide on the slide rail to move between multiple sets of the gate bodies to switch the moving contact that cooperates with the stationary contact; and after the moving contact is aligned with the stationary contact, the switching component can drive the moving contact to move closer to the stationary contact. During this process, the sealing plate can rotate to conduct the receiving sleeve.

2. The backup power supply for a smart grid substation according to claim 1, characterized in that, The protective component also includes a rotating sleeve rotatably mounted on the storage sleeve, and the rotating sleeve is provided with multiple sets of sealing grooves; the sealing plate is provided with a sliding column that slidably engages with the sealing grooves.

3. The backup power supply for a smart grid substation according to claim 2, characterized in that, The protective component further includes a top rod fitted inside the storage sleeve, and multiple sets of top rods are connected by a connecting plate; the moving contact is connected to the top rod through a buffer; a driving sleeve that is slidably connected to the storage sleeve is installed on the top rod, and a pressing plate is installed on the driving sleeve; a sliding sleeve that is slidably fitted onto the storage sleeve and engages with the rotating sleeve is installed on the sliding sleeve; a protruding post is installed on the sliding sleeve; a rotating groove that is slidably fitted onto the rotating sleeve and engages with the protruding post is provided on the rotating sleeve; a baffle that cooperates with the pressing plate is installed on the sliding sleeve; an extension spring is fitted onto the storage sleeve, and the two ends of the extension spring abut against the baffle and the driving sleeve, respectively.

4. A backup power supply for a smart grid substation according to claim 3, characterized in that, The buffer component includes a buffer sleeve mounted on the top rod, the movable contact slidably engages with the buffer sleeve, and a buffer spring is provided inside the buffer sleeve, with both ends of the buffer spring abutting against the movable contact and the buffer sleeve respectively.

5. A backup power supply for a smart grid substation according to claim 3, characterized in that, A gate-opening spring is fitted on the top rod, and the two ends of the gate-opening spring abut against the gate body and the connecting plate, respectively.

6. A backup power supply for a smart grid substation according to claim 3, characterized in that, The switching component includes a motor mounted on the mounting frame, with a lead screw mounted on the output end of the motor; a column slidably connected to the lead screw is mounted on the moving frame, and multiple sets of threaded sleeves are threadedly connected to the lead screw, with the multiple sets of threaded sleeves respectively disposed on both sides of the column; multiple sets of timing springs are sleeved on the lead screw, with the two ends of the multiple sets of timing springs respectively abutting against the threaded sleeves and the column.

7. A backup power supply for a smart grid substation according to claim 6, characterized in that, When the stationary contact is aligned with the moving contact, the moving frame slides to the end of the slide rail.

8. A backup power supply for a smart grid substation according to claim 6, characterized in that, The switching component also includes an extrusion plate installed on the threaded sleeve, a lifting frame slidably fitted on the column, a wedge block that cooperates with the extrusion plate and a top plate that compresses with the connecting plate installed on the lifting frame; a return spring is sleeved on the column, and the two ends of the return spring abut against the moving frame and the lifting frame respectively.

9. A backup power supply for a smart grid substation according to claim 8, characterized in that, When the extrusion plate presses the wedge, it can drive the lifting frame to slide upward along the axial direction of the column, thereby driving the connecting plate to slide upward through the top plate.

10. A method for activating the backup power supply of a smart grid substation as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Fault Response; When the main power supply line fails, the contact between the moving contact and the stationary contact on the main power supply line is disconnected by the switching device; after disconnection, the moving contact on the main power supply line retracts into the receiving sleeve. After retraction, the receiving sleeve is sealed by the protective device to prevent the exposed live contacts from causing arcing short circuits or the intrusion of external foreign objects, and to ensure physical insulation safety after power failure. Step 2: Lateral switching and alignment; the stationary contact is moved by the switching component to align with the moving contact on the backup power supply. At this time, the moving frame slides to the end of the slide rail. Step 3: Vertical lifting; the moving contact on the backup power supply is brought closer to the stationary contact by the switching component. During this process, the protective component on the switch body connected to the backup power supply can conduct through the receiving sleeve, thereby forming a conductive channel for the moving contact to pass through, so as to eliminate physical obstruction during the closing process. Step 4: Contact closure and power supply; The push rod continues to move upward, and through the buffer, the moving contact passes through the opened storage sleeve and makes elastic contact with the stationary contact. The buffer spring absorbs the impact and completes the circuit conduction, and the backup power supply is put into use.

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