Buffer control method and device of opening buffer device of high-voltage vacuum circuit breaker, storage medium and high-voltage vacuum circuit breaker
By detecting the opening status of the high-voltage vacuum circuit breaker and dynamically adjusting the opening area of the vent hole, combined with an ideal impact force model, the problem of insufficient adaptability and accuracy of existing buffer devices under operating conditions was solved, and stable and reliable opening operation of the high-voltage vacuum circuit breaker was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-24
- Publication Date
- 2026-03-27
AI Technical Summary
Existing high-voltage vacuum circuit breaker tripping buffer devices rely on fixed stiffness parameters for buffering performance, making them unable to adapt to changes in impact force under different operating conditions. This results in either insufficient or excessive buffering. Furthermore, traditional control methods cannot comprehensively consider the influence of multiple parameters, leading to insufficient buffering accuracy and severe mechanical damage.
By detecting the opening status of the high-voltage vacuum circuit breaker, collecting the screw stroke and rotation angle, dynamically adjusting the opening area and gas flow of the vent hole, and combining the ideal impact force model, adjusting the horizontal movement of the screw tip cone, the buffer force can be precisely adjusted.
It improves the stability and accuracy of the buffer device, reduces the mechanical damage to the circuit breaker caused by the tripping impact, extends the service life of the equipment, and ensures the continuity of power supply in the power system.
Smart Images
Figure CN121748218A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of high-voltage vacuum circuit breaker buffer control technology, and in particular to a buffer control method, device, storage medium, and high-voltage vacuum circuit breaker for a high-voltage vacuum circuit breaker tripping buffer device. Background Technology
[0002] In power systems, high-voltage vacuum circuit breakers are core equipment for ensuring the safe and stable operation of the power grid. The reliability of their tripping process directly affects the continuity of power supply. During tripping operations, the rapid separation of the moving and stationary contacts generates an instantaneous impact force. If this impact force is not effectively buffered, it will directly act on the circuit breaker's operating mechanism. Over time, this can easily lead to wear, deformation, or even failure of the mechanism's components, reducing the circuit breaker's service life and operational reliability.
[0003] Existing tripping buffer devices mostly employ single-spring or gas buffer structures, which have significant limitations. The buffering performance of a single-spring buffer device depends on a fixed stiffness parameter and cannot dynamically adjust the buffering effect according to the actual impact load. When faced with impacts under different working conditions, it is prone to insufficient or excessive buffering. A single gas buffer device is limited by the structure of the vent hole, with a fixed opening area, making it difficult to adapt to scenarios with varying impact mass, impact velocity, and other parameters, resulting in poor buffering stability.
[0004] In addition, traditional buffer control methods lack the ability to coordinate and adapt to multiple parameters, relying only on a single physical quantity (such as spring deformation or gas pressure) for control. They cannot comprehensively consider the impact of factors such as impact mass, impact velocity, and friction loss on the buffering effect, resulting in insufficient buffering accuracy and difficulty in effectively mitigating the mechanical damage of the circuit breaker caused by the tripping impact force. Summary of the Invention
[0005] In view of this, the present application provides a buffer control method, device, storage medium, and high-voltage vacuum circuit breaker for a high-voltage vacuum circuit breaker tripping buffer device. This allows the novel tripping buffer unit based on the high-voltage vacuum circuit breaker to reduce the impact of impact force on the high-voltage circuit breaker by using gas and telescopic springs as the main buffer units under different venting hole opening areas.
[0006] According to one aspect of this application, a buffer control method for a high-voltage vacuum circuit breaker tripping buffer device is provided, characterized in that the method includes: Detect the tripping status of the high-voltage vacuum circuit breaker; When the high-voltage vacuum circuit breaker is detected to be in the open state, the screw stroke, screw rotation angle and pre-impact velocity of the high-voltage vacuum circuit breaker are collected, and the horizontal movement of the screw tip cone is determined based on the screw stroke and screw rotation angle. The opening area of the drain hole of the buffer device is determined based on the horizontal movement of the screw tip cone. Obtain the ideal impact force model of the high-voltage vacuum circuit breaker, and substitute the opening area of the vent hole and the velocity before impact into the ideal impact force model to obtain the theoretical impact force of the buffer device; The screw is adjusted based on the theoretical impact force and the preset impact force to change the horizontal movement of the screw tip cone, thereby adjusting the impact force on the buffer device.
[0007] Optionally, adjusting the horizontal movement of the screw tip cone based on the theoretical impact force and the preset impact force includes: Obtain the area of the moving piston of the buffer device; Calculate the ratio of the opening area of the drain hole to the area of the moving piston; If the ratio is within the range of [0,1], then the horizontal movement of the screw tip cone is adjusted based on the theoretical impact force and the preset impact force.
[0008] Optionally, adjusting the horizontal movement of the screw tip cone based on the theoretical impact force and the preset impact force includes: The theoretical impact force is corrected based on a preset loss rate; If the corrected theoretical impact force is greater than the upper limit of the preset impact force, the screw is adjusted to increase the horizontal movement of the screw tip cone. If the corrected theoretical impact force is less than the lower limit of the preset impact force, the screw is adjusted to reduce the horizontal movement of the screw tip cone.
[0009] Optionally, after adjusting the screw based on the theoretical impact force and the preset impact force, the method further includes: Return to the step of detecting the tripping state of the high-voltage vacuum circuit breaker until the obtained corrected theoretical impact force is between the lower limit and the upper limit of the preset impact force.
[0010] Optionally, determining the horizontal movement of the screw tip cone based on the screw stroke and the screw rotation angle includes: Calculate the product of the screw stroke and the screw rotation angle, and take the ratio of the product to 2π as the horizontal movement of the screw tip cone.
[0011] Optionally, the opening area of the drain hole of the buffer device is determined based on the horizontal movement of the screw tip cone, including: The opening area of the drain hole of the buffer device can be calculated using the following formula: Where d represents the opening diameter of the drain hole, S represents the horizontal movement of the screw tip cone, and α represents the half-angle of the screw tip cone surface.
[0012] Optionally, the expression for the ideal impact force model is: ,in, The force represents the theoretical impact force, k represents the spring stiffness coefficient, and M represents the impact mass of the object. Indicates the velocity before impact. This indicates the area of the moving piston.
[0013] According to another aspect of this application, a buffer control device for a high-voltage vacuum circuit breaker tripping buffer device is provided, the device comprising: The status detection module is used to detect the open status of the high-voltage vacuum circuit breaker; The horizontal movement calculation module is used to collect the screw stroke, screw rotation angle and pre-impact velocity of the high-voltage vacuum circuit breaker when it is detected that the high-voltage vacuum circuit breaker is in the open state, and to determine the horizontal movement of the screw tip cone based on the screw stroke and screw rotation angle. An opening area calculation module is used to determine the opening area of the drain hole of the buffer device based on the horizontal movement of the screw tip cone. The impact force calculation module is used to obtain the ideal impact force model of the high-voltage vacuum circuit breaker. The opening area of the vent hole and the velocity before impact are substituted into the ideal impact force model to obtain the theoretical impact force of the buffer device. The adjustment module is used to adjust the screw based on the theoretical impact force and the preset impact force, so as to change the horizontal movement of the screw tip cone and realize the adjustment of the impact force of the buffer device.
[0014] Optionally, the adjustment module is used for: Obtain the area of the moving piston of the buffer device; Calculate the ratio of the opening area of the drain hole to the area of the moving piston; If the ratio is within the range of [0,1], then the horizontal movement of the screw tip cone is adjusted based on the theoretical impact force and the preset impact force.
[0015] Optionally, the adjustment module is used for: The theoretical impact force is corrected based on a preset loss rate; If the corrected theoretical impact force is greater than the upper limit of the preset impact force, the screw is adjusted to increase the horizontal movement of the screw tip cone. If the corrected theoretical impact force is less than the lower limit of the preset impact force, the screw is adjusted to reduce the horizontal movement of the screw tip cone.
[0016] Optionally, the state detection module is used to adjust the screw based on the theoretical impact force and the preset impact force, and then return to the step of detecting the open state of the high-voltage vacuum circuit breaker. The adjustment module is also used to stop adjusting until the obtained corrected theoretical impact force is between the lower limit of the preset impact force and the upper limit of the preset impact force.
[0017] Optionally, the horizontal movement calculation module is used for: Calculate the product of the screw stroke and the screw rotation angle, and take the ratio of the product to 2π as the horizontal movement of the screw tip cone.
[0018] Optionally, the opening area calculation module is used for: The opening area of the drain hole of the buffer device can be calculated using the following formula: Where d represents the opening diameter of the drain hole, S represents the horizontal movement of the screw tip cone, and α represents the half-angle of the screw tip cone surface.
[0019] Optionally, the expression for the ideal impact force model is: ,in, The force represents the theoretical impact force, k represents the spring stiffness coefficient, and M represents the impact mass of the object. Indicates the velocity before impact. This indicates the area of the moving piston.
[0020] According to another aspect of this application, a storage medium is provided that stores a computer program thereon, which, when executed by a processor, implements the buffer control method of the above-described high-voltage vacuum circuit breaker tripping buffer device.
[0021] According to another aspect of this application, a high-voltage vacuum circuit breaker is provided, including a storage medium, a processor, and a computer program stored on the storage medium and executable on the processor. When the processor executes the program, it implements the buffer control method of the high-voltage vacuum circuit breaker tripping buffer device described above.
[0022] By means of the above technical solutions, the buffer control method, device, storage medium and high voltage vacuum circuit breaker provided in the embodiments of this application can reduce the impact of impact force on the high voltage circuit breaker by using gas and telescopic spring as the main buffer units under different vent hole opening areas of the novel high voltage vacuum circuit breaker.
[0023] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description
[0024] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 A schematic flowchart of a buffer control method for a high-voltage vacuum circuit breaker tripping buffer device provided in an embodiment of this application is shown. Figure 2 This paper shows a schematic diagram of the structure of a novel tripping buffer unit based on a high-voltage vacuum circuit breaker provided in an embodiment of this application; Figure 3 This illustration shows a schematic diagram of the opening area structure of the discharge hole of a novel tripping buffer unit based on a high-voltage vacuum circuit breaker according to an embodiment of this application; Figure 4 This illustration shows a schematic diagram of the cross-sectional structure of the vent hole opening of a novel tripping buffer unit based on a high-voltage vacuum circuit breaker, provided in an embodiment of this application. Figure 5 A schematic diagram of the buffer control device of a high-voltage vacuum circuit breaker tripping buffer device provided in an embodiment of this application is shown. Detailed Implementation
[0025] The present application will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present application can be combined with each other.
[0026] This embodiment provides a buffer control method for a high-voltage vacuum circuit breaker tripping buffer device, such as... Figure 1 As shown, the method includes: Step 101: Check the open status of the high-voltage vacuum circuit breaker.
[0027] Step 102: When the high-voltage vacuum circuit breaker is detected to be in the open state, the screw stroke, screw rotation angle and pre-impact velocity of the high-voltage vacuum circuit breaker are collected, and the horizontal movement of the screw tip cone is determined based on the screw stroke and the screw rotation angle.
[0028] In the embodiments of this application, such as Figure 2The diagram shows the structure of a novel tripping buffer unit based on a high-voltage vacuum circuit breaker. In the diagram, 1 is the impactor head, 2 is the spring, 3 is the coupling, 4 is the moving piston, 5 is the outer casing, 6 is the gas chamber, 7 is the tail cover, 8 is the adjusting base, and 9 is the screw. When a collision occurs, gas is discharged through the vent hole. The size of the vent hole's opening area determines the speed of the moving piston. At this time, the spring compresses and moves upon impact; this is the structure of the novel buffer unit.
[0029] First, the tripping status of the high-voltage vacuum circuit breaker is detected to determine if it is in the tripping state. When the circuit breaker is detected to be in the tripping state, data such as screw stroke, screw rotation angle, and pre-impact velocity are collected. Based on the screw stroke and screw rotation angle, the horizontal movement of the screw tip cone is determined through a specific calculation method. This step provides key parameters for subsequently determining the opening area of the vent hole of the buffer device. For example, S represents the opening area of the vent hole, and h represents the screw stroke. This indicates the screw rotation angle.
[0030] Step 103: Determine the opening area of the drain hole of the buffer device based on the horizontal movement of the screw tip cone.
[0031] Next, the opening area of the drain hole of the buffer device is determined based on the determined horizontal movement of the screw tip cone. Figure 3 This diagram illustrates the structure of the vent hole opening area of a novel tripping buffer unit based on a high-voltage vacuum circuit breaker. It is installed at the tail cover and comprises an adjusting base and a screw. The screw's top cone rotates and moves horizontally, causing a change in the vent hole opening area at the gas chamber tail cover, thus achieving control over the vent hole opening area.
[0032] For example, the opening area of the drain hole of the buffer device can be calculated using the following formula: ,in, denoted by , where d represents the opening area of the vent hole, d represents the opening diameter of the vent hole, S represents the horizontal movement of the screw tip cone, and α represents the half-angle of the screw tip cone surface.
[0033] This formula is based on the geometric relationship between the horizontal movement S of the screw tip cone, the diameter d of the vent hole, and the half-angle α of the screw tip cone surface. When the screw tip cone moves horizontally, different geometric models are formed according to the magnitude of the movement S to calculate the vent hole area. At that time, the opening area of the drain hole The calculation involves trigonometric relationships. As the screw tip moves horizontally, the effective flow area of the drain hole gradually changes. At this time, the opening area of the drain hole... Calculation formula This reflects that within this range of movement, the effective area is equal to the initial area of the effluent orifice ( (i.e., the theoretical area when the hole is fully open) minus the area obstructed by the movement of the screw tip cone (and... (Related). When the screw tip cone moves beyond a certain limit, the effective opening area of the drain hole no longer changes and remains at a certain value. This means the vent is fully open, allowing gas to flow through at maximum flow rate to provide maximum buffering. By considering different horizontal movement S of the screw tip cone, the appropriate vent opening area can be accurately calculated based on the actual tripping state. This allows the buffer device to dynamically adjust the vent size according to varying impact mass, impact velocity, and other parameters, thus better adapting to various operating conditions and improving buffering stability and accuracy. Precise vent opening area calculation helps to better control the gas flow rate and velocity within the buffer device, thereby achieving precise adjustment of the buffering force. This effectively avoids insufficient or excessive buffering, reduces mechanical damage to the circuit breaker from tripping impact forces, extends the circuit breaker's service life, and ensures the continuity of power supply to the power system. Figure 4 This is a schematic diagram of the cross-sectional structure of the vent hole opening of a novel tripping buffer unit based on a high-voltage vacuum circuit breaker. The size of the vent hole opening can be adjusted by controlling the horizontal movement of the screw tip cone. The horizontal movement of the screw tip cone is controlled... The size of the drain hole can control its opening area. The size, thereby achieving the effect of impact force Size adjustment.
[0034] Step 104: Obtain the ideal impact force model of the high-voltage vacuum circuit breaker, and substitute the opening area of the vent hole and the velocity before impact into the ideal impact force model to obtain the theoretical impact force of the buffer device.
[0035] Furthermore, an ideal impact force model of the high-voltage vacuum circuit breaker is obtained. The orifice opening area and the collected pre-impact velocity are substituted into this model to calculate the theoretical impact force of the buffer device. This step comprehensively considers the influence of the orifice opening area and the pre-impact velocity on the impact force. For example, the expression of the ideal impact force model is: ,in, The force represents the theoretical impact force, k represents the spring stiffness coefficient, and M represents the impact mass of the object. Indicates the velocity before impact. This indicates the area of the moving piston.
[0036] Step 105: Adjust the screw based on the theoretical impact force and the preset impact force to change the horizontal movement of the screw tip cone, thereby adjusting the impact force on the buffer device.
[0037] Finally, the calculated theoretical impact force was compared with the preset impact force, and the screw was adjusted according to the comparison results, thereby changing the horizontal movement of the screw tip cone. Since the opening area of the drain hole is related to the horizontal movement of the screw tip cone, the impact force of the buffer device was ultimately adjusted, allowing it to better adapt to actual working conditions.
[0038] In this embodiment of the application, optionally, adjusting the horizontal movement of the screw tip cone based on the theoretical impact force and the preset impact force includes: obtaining the area of the moving piston of the buffer device; calculating the ratio of the opening area of the drain hole to the area of the moving piston; if the ratio is in the range of [0,1], then adjusting the horizontal movement of the screw tip cone based on the theoretical impact force and the preset impact force.
[0039] In this embodiment, the area of the moving piston in the buffer device is first obtained, and the ratio of the previously calculated vent opening area to the obtained moving piston area is calculated. It is then determined whether this ratio is within the range of [0,1]. If the ratio is within this range, the horizontal movement of the screw tip cone is adjusted based on the theoretical impact force and the preset impact force. This means that only when the vent opening area is within a reasonable range relative to the moving piston area will the position of the screw tip cone be adjusted according to the difference in impact force, thereby achieving further adjustment of the impact force of the buffer device. Specifically, when... At this time, there is no gas release from the gas chamber, and the spring plays the main role in cushioning. It tends toward infinity; when At that time, the moving piston encountered no obstruction. When the value is close to zero, there are no satisfied boundary conditions; when When it approaches infinity, <0, this case is meaningless. Impact force Only with Related to, among them .
[0040] In this embodiment of the application, optionally, adjusting the horizontal movement of the screw tip cone based on the theoretical impact force and the preset impact force includes: correcting the theoretical impact force based on a preset loss rate; if the corrected theoretical impact force is greater than the upper limit of the preset impact force, adjusting the screw to increase the horizontal movement of the screw tip cone; if the corrected theoretical impact force is less than the lower limit of the preset impact force, adjusting the screw to decrease the horizontal movement of the screw tip cone.
[0041] In this embodiment, firstly, the calculated theoretical impact force is corrected based on a preset loss rate. This step takes into account various energy losses that may occur during actual operation, making the impact force data closer to reality. Next, a judgment is made: if the corrected theoretical impact force is greater than the upper limit of the preset impact force, it indicates that the current buffering force may be insufficient and unable to effectively alleviate the tripping impact. In this case, the screw is adjusted to increase the horizontal movement of the screw tip cone, and the buffering force is increased by changing the opening area of the drain hole, etc. Conversely, if the corrected theoretical impact force is less than the lower limit of the preset impact force, it means that the buffering force may be too large, which may affect the normal tripping action of the circuit breaker. Therefore, the screw is adjusted to reduce the horizontal movement of the screw tip cone, thereby reducing the buffering force. This embodiment corrects the theoretical impact force by setting a preset loss rate, making the adjustment basis more consistent with the actual working conditions. The horizontal movement of the screw top cone is precisely adjusted according to the relationship between the corrected theoretical impact force and the upper and lower limits of the preset impact force. This can avoid damage to the mechanical structure of the circuit breaker due to insufficient buffering, and prevent excessive buffering from affecting the opening performance. Thus, it effectively ensures the stability and reliability of the high-voltage vacuum circuit breaker's opening process and extends the service life of the equipment.
[0042] Additionally, the deformation of the buffer device spring can be obtained, and the product of this deformation and the spring stiffness coefficient can be calculated to obtain the actual impact force. If the deviation between the corrected theoretical impact force and the actual impact force is greater than the preset deviation, then the preset loss rate is compensated based on the actual impact force and the corrected theoretical impact force, so that after the theoretical impact force is corrected based on the preset loss rate, the deviation between the corrected theoretical impact force and the actual impact force is within the preset deviation range.
[0043] Optionally, after adjusting the screw based on the theoretical impact force and the preset impact force in this application embodiment, the method further includes: returning to the step of detecting the open state of the high-voltage vacuum circuit breaker until the obtained corrected theoretical impact force is between the lower limit of the preset impact force and the upper limit of the preset impact force.
[0044] In this embodiment, after adjusting the screw based on the theoretical impact force and the preset impact force, the process does not end there. Instead, it returns to the step of detecting the open state of the high-voltage vacuum circuit breaker. Then, a series of operations are repeatedly performed, including collecting relevant data, calculating the theoretical impact force, correcting the theoretical impact force, and adjusting the screw based on the correction result and the preset impact force range. This forms a cyclical control process until the final corrected theoretical impact force falls within a reasonable range between the lower and upper limits of the preset impact force, at which point the cyclical control process stops.
[0045] By applying the technical solution of this embodiment, the novel tripping buffer unit based on the high-voltage vacuum circuit breaker can reduce the impact of impact force on the high-voltage circuit breaker by using gas and telescopic springs as the main buffer units under different bleed hole opening areas.
[0046] This invention overcomes the limitations of existing buffer devices and solves the problem of single-spring buffering. Existing single-spring buffer devices rely on fixed stiffness parameters for buffering performance and cannot be dynamically adjusted according to actual impact loads. However, this embodiment indirectly achieves dynamic adjustment of the buffering effect by detecting multiple parameters and dynamically adjusting the opening area of the vent hole, avoiding the problems of insufficient or excessive buffering that easily occur with single-spring buffer devices under different working conditions. It also solves the problem of single-gas buffering. Single-gas buffer devices are limited by the vent hole structure, with a fixed opening area, making it difficult to adapt to scenarios with varying impact mass, impact velocity, and other parameters. This embodiment dynamically determines the vent hole opening area based on the horizontal movement of the screw tip cone, better adapting to scenarios with varying parameters and improving buffering stability. Furthermore, it improves buffering accuracy. Traditional buffering control methods rely on only a single physical quantity for control and cannot comprehensively consider the impact of factors such as impact mass, impact velocity, and friction loss on the buffering effect. In calculating the theoretical impact force, this application embodiment comprehensively considers the opening area of the vent hole and the velocity before impact. Furthermore, by adjusting the screw subsequently, the difference between the actual impact force and the preset impact force is further considered, which enables more precise adjustment of the impact force of the buffer device and alleviates the mechanical damage to the circuit breaker caused by the tripping impact force.
[0047] Furthermore, as Figure 1 In a specific implementation of the method, this application provides a buffer control device for a high-voltage vacuum circuit breaker tripping buffer device, such as... Figure 5 As shown, the device includes: The status detection module is used to detect the open status of the high-voltage vacuum circuit breaker; The horizontal movement calculation module is used to collect the screw stroke, screw rotation angle and pre-impact velocity of the high-voltage vacuum circuit breaker when it is detected that the high-voltage vacuum circuit breaker is in the open state, and to determine the horizontal movement of the screw tip cone based on the screw stroke and screw rotation angle. An opening area calculation module is used to determine the opening area of the drain hole of the buffer device based on the horizontal movement of the screw tip cone. The impact force calculation module is used to obtain the ideal impact force model of the high-voltage vacuum circuit breaker. The opening area of the vent hole and the velocity before impact are substituted into the ideal impact force model to obtain the theoretical impact force of the buffer device. The adjustment module is used to adjust the screw based on the theoretical impact force and the preset impact force, so as to change the horizontal movement of the screw tip cone and realize the adjustment of the impact force of the buffer device.
[0048] Optionally, the adjustment module is used for: Obtain the area of the moving piston of the buffer device; Calculate the ratio of the opening area of the drain hole to the area of the moving piston; If the ratio is within the range of [0,1], then the horizontal movement of the screw tip cone is adjusted based on the theoretical impact force and the preset impact force.
[0049] Optionally, the adjustment module is used for: The theoretical impact force is corrected based on a preset loss rate; If the corrected theoretical impact force is greater than the upper limit of the preset impact force, the screw is adjusted to increase the horizontal movement of the screw tip cone. If the corrected theoretical impact force is less than the lower limit of the preset impact force, the screw is adjusted to reduce the horizontal movement of the screw tip cone.
[0050] Optionally, the state detection module is used to adjust the screw based on the theoretical impact force and the preset impact force, and then return to the step of detecting the open state of the high-voltage vacuum circuit breaker. The adjustment module is also used to stop adjusting until the obtained corrected theoretical impact force is between the lower limit of the preset impact force and the upper limit of the preset impact force.
[0051] Optionally, the horizontal movement calculation module is used for: Calculate the product of the screw stroke and the screw rotation angle, and take the ratio of the product to 2π as the horizontal movement of the screw tip cone.
[0052] Optionally, the opening area calculation module is used for: The opening area of the drain hole of the buffer device can be calculated using the following formula: Where d represents the opening diameter of the drain hole, S represents the horizontal movement of the screw tip cone, and α represents the half-angle of the screw tip cone surface.
[0053] Optionally, the expression for the ideal impact force model is: ,in, The force represents the theoretical impact force, k represents the spring stiffness coefficient, and M represents the impact mass of the object. Indicates the velocity before impact. This indicates the area of the moving piston.
[0054] It should be noted that for other corresponding descriptions of the functional units involved in the buffer control device of the high-voltage vacuum circuit breaker tripping buffer device provided in this application embodiment, please refer to... Figures 1 to 4 The corresponding descriptions in the method will not be repeated here.
[0055] This application also provides a high-voltage vacuum circuit breaker, including a controller for implementing the above method.
[0056] In one embodiment, a computer-readable storage medium is provided, which may be non-volatile or volatile, having stored thereon a computer program that, when executed by a processor, implements the steps in the above method embodiments.
[0057] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above method embodiments.
[0058] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments described above. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, graphics processors, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.
[0059] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0060] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.
Claims
1. A method of controlling a buffer of a high-voltage vacuum circuit breaker opening buffer device, characterized by, The method comprises: detecting an open state of a high-voltage vacuum circuit breaker; when detecting that the high-voltage vacuum circuit breaker is in the open state, collecting screw rod travel, screw rod rotation angle and pre-impact speed of the high-voltage vacuum circuit breaker, determining screw rod top cone horizontal movement amount based on the screw rod travel and the screw rod rotation angle; determining a relief hole opening area of a buffer device according to the screw rod top cone horizontal movement amount; obtaining an ideal impact force model of the high-voltage vacuum circuit breaker, substituting the relief hole opening area and the pre-impact speed into the ideal impact force model to obtain a theoretical impact force of the buffer device; based on the theoretical impact force and a preset impact force, adjusting the screw rod to change the screw rod top cone horizontal movement amount, so as to realize impact force adjustment of the buffer device.
2. The method of claim 1, wherein, Based on the theoretical impact force and the preset impact force, adjusting the screw rod top cone horizontal movement amount comprises: obtaining a moving piston area of the buffer device; calculating a ratio of the relief hole opening area to the moving piston area; if the ratio is within the range of [0, 1], then based on the theoretical impact force and the preset impact force, adjusting the screw rod top cone horizontal movement amount.
3. The method of claim 2, wherein, Based on the theoretical impact force and the preset impact force, adjusting the screw rod top cone horizontal movement amount comprises: correcting the theoretical impact force based on a preset loss rate; if the corrected theoretical impact force is greater than an upper limit of the preset impact force, then adjusting the screw rod to increase the screw rod top cone horizontal movement amount; if the corrected theoretical impact force is less than a lower limit of the preset impact force, then adjusting the screw rod to decrease the screw rod top cone horizontal movement amount.
4. The method of claim 3, wherein, After adjusting the screw rod based on the theoretical impact force and the preset impact force, the method further comprises: returning to the step of detecting the open state of the high-voltage vacuum circuit breaker until the obtained corrected theoretical impact force is between the lower limit of the preset impact force and the upper limit of the preset impact force.
5. The method according to any one of claims 1 to 4, characterized in that, Based on the screw rod travel and the screw rod rotation angle, determining the screw rod top cone horizontal movement amount comprises: calculating a product of the screw rod travel and the screw rod rotation angle, and taking a ratio of the product to 2π as the screw rod top cone horizontal movement amount.
6. The method according to any one of claims 1 to 4, characterized in that, According to the screw rod top cone horizontal movement amount, determining the relief hole opening area of the buffer device comprises: calculating the relief hole opening area of the buffer device by the following formula: wherein, represents the opening area of the leakage hole, d represents the opening diameter of the leakage hole, S represents the horizontal movement amount of the screw top cone, and a represents the half-angle angle of the cone surface of the screw top cone.
7. The method according to any one of claims 1 to 4, characterized in that, The expression of the ideal impact force model is wherein, represents the theoretical impact force, k represents the spring stiffness coefficient, M represents the object impact mass, represents the pre-impact speed, represents the moving piston area.
8. A buffer control device of a high-voltage vacuum circuit breaker opening buffer device, characterized by, The device comprises: a state detection module configured to detect an open state of a high-voltage vacuum circuit breaker; a horizontal movement amount calculation module configured to, when detecting that the high-voltage vacuum circuit breaker is in the open state, collect screw rod travel, screw rod rotation angle and pre-impact speed of the high-voltage vacuum circuit breaker, and determine screw rod top cone horizontal movement amount based on the screw rod travel and the screw rod rotation angle; an opening area calculation module configured to determine a relief hole opening area of a buffer device according to the screw rod top cone horizontal movement amount; an impact force calculation module configured to obtain an ideal impact force model of the high-voltage vacuum circuit breaker, substitute the relief hole opening area and the pre-impact speed into the ideal impact force model to obtain a theoretical impact force of the buffer device; and an adjustment module configured to, based on the theoretical impact force and a preset impact force, adjust the screw rod to change the screw rod top cone horizontal movement amount, so as to realize impact force adjustment of the buffer device. An adjusting module is configured to adjust the screw based on the theoretical impact force and a preset impact force, so as to change the horizontal movement amount of the top cone of the screw and achieve impact force adjustment of the buffer device.
9. A high-voltage vacuum circuit breaker, characterized by A controller configured to implement the method of any one of claims 1 to 7.
10. A storage medium having stored thereon a computer program, characterized in that The computer program, when executed by a processor, implements the method of any one of claims 1 to 7.