CN118136449B - Vacuum circuit breaker self-adaptive closing method, electronic equipment and storage medium - Google Patents
Vacuum circuit breaker self-adaptive closing method, electronic equipment and storage medium Download PDFInfo
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Abstract
The invention discloses a vacuum circuit breaker self-adaptive closing method, electronic equipment and a storage medium. When the actual bouncing time is within a reasonable range, directly using the historical action information as a control strategy; when the bouncing time exceeds the adjusting threshold value but is still within the protecting threshold value, correcting the action information of the switching coil; and when the bouncing time exceeds the protection threshold value, resetting the action information of the switching coil. According to the invention, the action strategy of the closing coil is adjusted according to the actual bouncing time, so that the closing precision and stability are improved, unnecessary bouncing and impact are reduced, the mechanical abrasion and electrical loss of equipment are reduced, and the service life of the vacuum circuit breaker is prolonged.
Description
Technical Field
The invention relates to the technical field of vacuum circuit breakers, in particular to a self-adaptive closing method of a vacuum circuit breaker, electronic equipment and a storage medium.
Background
The vacuum circuit breaker is widely applied to high-low voltage switch cabinets by virtue of excellent insulation level and environment-friendly performance, and the key characteristic of contact bounce when the vacuum circuit breaker is switched on is an important index for evaluating whether the vacuum circuit breaker has excellent switching-on and switching-off performance. The switching-on bounce refers to the time from when the contact is just contacted to when the contact is stably contacted in the vacuum circuit breaker, and the electric life of the arc extinguishing chamber is influenced by electric arc, which is only generated when the moving contact and the fixed contact are not contacted, and is not generated when the moving contact and the fixed contact are contacted. A large number of practices and theoretical analysis show that the factor really influencing the electric life of the vacuum circuit breaker is overlong closing bounce time in the closing process. Therefore, how to reduce the closing bounce time of the vacuum circuit breaker becomes a problem to be solved in the field of vacuum circuit breakers.
The Chinese patent with publication number CN109524252A discloses a method for inhibiting the closing bounce of a permanent magnet circuit breaker based on moving average filtering, which predicts the stage of closing by judging the characteristic of coil current and adopts a moving average filtering algorithm to process sampling current data, thereby applying different control signals to different stages of the closing process according to the characteristic of closing current, and effectively reducing the closing bounce. The prior art controls different signals in a closing period of the vacuum circuit breaker, the signal response is based on waveform sampling of a coil during closing action and a proximity switch ranging signal of the closing end of a contact, and for most of closing requirements (closing bounce time is less than or equal to 5 ms) of the vacuum circuit breaker in the market, the technical scheme has hysteresis of control response in actual application and still has the problem of longer closing bounce time.
Disclosure of Invention
In order to solve the problems, the invention provides a vacuum circuit breaker self-adaptive closing method, electronic equipment and a storage medium.
In a first aspect of the present invention, there is provided a vacuum circuit breaker adaptive closing method, including:
Acquiring closing bounce protection information, closing coil historical action information and contact historical displacement information; the closing bounce protection information comprises a closing bounce adjustment threshold and a closing bounce protection threshold;
Extracting actual closing bounce time of the contact history displacement information according to the contact history displacement information;
If the actual closing bounce time does not exceed the closing bounce adjustment threshold, taking the historical action information of the closing coil as a control strategy of the vacuum circuit breaker for closing next time;
If the actual closing bounce time exceeds the closing bounce adjustment threshold and does not exceed the closing bounce protection threshold, correcting the historical action information of the closing coil, and taking the corrected historical action information of the closing coil as a control strategy of the vacuum circuit breaker for closing next time;
And if the actual closing bounce time exceeds the closing bounce protection threshold, resetting the historical action information of the closing coil, and taking the reset historical action information of the closing coil as a control strategy of the next closing of the vacuum circuit breaker.
Optionally, the historical action information of the closing coil is a current curve of the closing coil in the last closing process of the vacuum circuit breaker; the historical displacement information of the contact is a displacement action curve of the contact in the last closing process of the vacuum circuit breaker.
Optionally, according to a displacement action curve of the contact in the last closing process of the vacuum circuit breaker, sequentially determining displacement peak points Pd i of the displacement action curve according to a time axis sequence, wherein i is the number of the displacement peak points, and i is more than or equal to 2; traversing the time difference between the adjacent displacement peak point positions Pd i, and sequentially taking the time difference as the actual closing bounce time CBt j, wherein j is the number of the actual closing bounce time, and j is more than or equal to 1.
Optionally, presetting the closing bounce adjustment threshold CBr j and presetting the closing bounce protection threshold CBp j, wherein j is more than or equal to 1;
Based on the number j of the actual closing bounce times CBt j, comparing the actual closing bounce times CBt j with the closing bounce adjustment threshold CBr j and the closing bounce protection threshold CBp j one by one respectively,
If any of the actual closing bounce times CBt j does not exceed the corresponding closing bounce adjustment threshold CBr j, taking the current curve of the closing coil in the last closing process as a control strategy of the next closing of the vacuum circuit breaker,
If the actual closing bounce time CBt j exceeds the closing bounce adjustment threshold CBr j and does not exceed the closing bounce protection threshold CBp j, performing current control correction on a time period corresponding to a current curve of the closing coil according to the time period of the actual closing bounce time CBt j,
If the actual closing bounce time CBt j exceeds the closing bounce protection threshold CBp j, performing current control reset on a time period corresponding to a current curve of the closing coil according to the time period of the actual closing bounce time CBt j.
Optionally, the current control correction includes: calculating the maximum amplitude value of the contact bounce to be corrected according to the displacement action curve of the contact in the last closing process of the vacuum circuit breakerConstructing a correction functionIn which, in the process,In order to correct the coefficient of the coefficient,＜0，The bounce amplitude is allowed for the contact,For the time of energizing the coil,Is a constant; the correction function is processedSuperimposed on the current profile of the closing coil for the respective time period.
Optionally, the time period for correcting the current curve of the closing coil is the time period from the nearest current peak value to the next current valley value before the closing bounce action; the correction coefficientThe value range of the (E) is-1.80 to-1.20.
Optionally, the current control reset includes: prolonging the corresponding time period of the current curve of the closing coil, wherein the prolonged time is a multiple of the actual closing bounce time CBt j, and constructing a reset functionIn which, in the process,A is more than 0 and less than 1 for resetting coefficient,Time period to be reset for closing coil current curve and≥1，The initial current value for the time period to be reset for the closing coil current profile.
Optionally, in the adjustment process of the control strategy of the next closing of the vacuum circuit breaker, the correction and the reset of the historical action information of the closing coil are independently performed.
In a second aspect of the present invention, an electronic device is provided, including a memory and a processor, where the memory stores a computer program, and the processor implements the steps of the adaptive closing method of a vacuum circuit breaker when executing the computer program.
In a third aspect of the present invention, there is provided a storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the vacuum circuit breaker adaptive closing method described above.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
According to the technical scheme, the self-adaptive closing method of the vacuum circuit breaker is characterized in that by acquiring closing bounce protection information, closing coil historical action information and contact historical displacement information, according to comparison of actual closing bounce time with a set closing bounce adjustment threshold value and a closing bounce protection threshold value, the action strategy of a closing coil can be self-adaptively adjusted. When the actual bouncing time is within a reasonable range, directly using the historical action information as a control strategy; when the bouncing time exceeds the adjusting threshold value but is still within the protecting threshold value, correcting the action information of the switching coil; and when the bouncing time exceeds the protection threshold value, resetting the action information of the switching coil.
According to the invention, the switching-on bounce adjusting threshold value and the switching-on bounce protecting threshold value are set, analysis of contact historical displacement information, in particular extraction of actual switching-on bounce time, enables analysis of a switching-on process to be deeper, further enables action strategies of switching-on coils to be adjusted according to the actual bounce time, improves switching-on precision and stability, enables a vacuum circuit breaker to realize more optimized switching-on operation under different conditions by self-adaptive adjustment capability, reduces unnecessary bounce and impact, is beneficial to reducing mechanical abrasion and electrical loss of equipment, and prolongs service life of the vacuum circuit breaker.
Drawings
Fig. 1 is a flowchart of an adaptive closing method of a vacuum circuit breaker according to an embodiment of the present invention.
Fig. 2 is a graph of current of a closing coil during a closing process of a vacuum circuit breaker according to an embodiment of the present invention.
Fig. 3 is a graph of displacement motion of a contact during closing of a vacuum circuit breaker according to an embodiment of the present invention.
Fig. 4 is a graph of current of a closing coil in the closing process of the vacuum circuit breaker after correction and reset according to an embodiment of the present invention.
Fig. 5 is a graph showing the displacement action of the contact during the closing process of the vacuum circuit breaker after the correction and the reset according to the embodiment of the present invention.
Fig. 6 is a schematic diagram of an electronic device according to an embodiment of the invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
With reference to fig. 1, the technical scheme of the invention is a vacuum circuit breaker self-adaptive closing method, comprising the following steps:
s100, acquiring closing bounce protection information, closing coil historical action information and contact historical displacement information; the closing bounce protection information comprises a closing bounce adjustment threshold and a closing bounce protection threshold;
s200, extracting actual closing bounce time of the contact history displacement information according to the contact history displacement information;
s300, if the actual closing bounce time does not exceed the closing bounce adjustment threshold, taking the historical action information of the closing coil as a control strategy of the next closing of the vacuum circuit breaker;
S400, if the actual closing bounce time exceeds the closing bounce adjustment threshold and does not exceed the closing bounce protection threshold, correcting the historical action information of the closing coil, and taking the corrected historical action information of the closing coil as a control strategy of the vacuum circuit breaker for next closing;
S500, if the actual closing bounce time exceeds the closing bounce protection threshold, resetting the historical action information of the closing coil, and taking the reset historical action information of the closing coil as a control strategy of the vacuum circuit breaker for next closing.
In the above embodiment, the number of bounces between the moving contact and the fixed contact in the closing process of the vacuum circuit breaker is 1 to more than 3 times, and the number of bounces is usually within 3 times (including 3 times).
In the above embodiment, the historical motion information of the closing coil is collected by a current transformer, and the historical displacement information of the contact is collected by a high-precision linear displacement sensor.
In the embodiment, the adaptive closing method of the vacuum circuit breaker is to obtain closing bounce protection information, closing coil historical action information and contact historical displacement information, and according to comparison of the actual closing bounce time with a set closing bounce adjustment threshold and a closing bounce protection threshold, the method can adaptively adjust the action strategy of the closing coil. When the actual bouncing time is within a reasonable range, directly using the historical action information as a control strategy; when the bouncing time exceeds the adjusting threshold value but is still within the protecting threshold value, correcting the action information of the switching coil; resetting the action information of the switching coil when the bouncing time exceeds the protection threshold
The step S300 is to use the historical action information of the closing coil as a control strategy of the vacuum circuit breaker for the next closing, that is, the control mode of the closing coil is not changed, but the precondition is that the actual closing bounce time of all the contact bounces does not exceed the closing bounce adjustment threshold.
As can be seen from the above, the vacuum circuit breaker may have multiple closing bounce during the closing process, so that the actual closing bounce time of each time is independently compared, and different closing bounce adjustment thresholds/closing bounce protection thresholds are preset for the closing bounce sequence. For example, the first closing bounce adjustment threshold is set to 3ms, and the second closing bounce adjustment threshold is set to 1.5ms.
The step S400 and the step S500 are performed independently for closing bounce. For example, in the switching-on process of the primary vacuum circuit breaker, if the actual switching-on bounce time exceeds the first switching-on bounce adjustment threshold but does not exceed the first switching-on bounce protection threshold, the switching-on coil control time period corresponding to the first switching-on bounce is corrected, and if the actual switching-on bounce time exceeds the second switching-on bounce protection threshold, the switching-on coil control time period corresponding to the first switching-on bounce is reset; and finally, taking the corrected and reset historical action information of the closing coil as a control strategy of the next closing of the vacuum circuit breaker.
In this embodiment, the historical action information of the closing coil is a current curve of the closing coil in the last closing process of the vacuum circuit breaker; the historical displacement information of the contact is a displacement action curve of the contact in the last closing process of the vacuum circuit breaker. As shown in fig. 2 and fig. 4, the current curve of the closing coil in the closing process of a certain vacuum circuit breaker is shown in fig. 2, which is the current curve of the closing coil before adjustment, and fig. 4, which is the current curve of the closing coil after adjustment; as shown in fig. 3 and fig. 5, the displacement action graph of the contact in the closing process of a certain vacuum circuit breaker is shown, wherein fig. 3 is the displacement action graph of the contact before adjustment, and fig. 5 is the displacement action graph of the contact after adjustment.
In this embodiment, the step S200 specifically includes: according to a displacement action curve of a contact in the last closing process of the vacuum circuit breaker, sequentially determining displacement peak points Pd i of the displacement action curve according to a time axis sequence, wherein i is the number of the displacement peak points, and i is more than or equal to 2; traversing the time difference between the adjacent displacement peak point positions Pd i, and sequentially taking the time difference as the actual closing bounce time CBt j, wherein j is the number of the actual closing bounce time, and j is more than or equal to 1.
As shown in fig. 3, the displacement action curve has 3 displacement peak points Pd i, that is, the vacuum circuit breaker has two closing hops in the closing process, which are respectively an actual closing bounce time CBt 1 and an actual closing bounce time CBt 2.
In this embodiment, the closing bounce adjustment threshold CBr j is preset, and the closing bounce protection threshold CBp j is preset, where j is greater than or equal to 1;
Based on the number j of the actual closing bounce times CBt j, comparing the actual closing bounce times CBt j with the closing bounce adjustment threshold CBr j and the closing bounce protection threshold CBp j one by one respectively,
If any of the actual closing bounce times CBt j does not exceed the corresponding closing bounce adjustment threshold CBr j, taking the current curve of the closing coil in the last closing process as a control strategy of the next closing of the vacuum circuit breaker,
If the actual closing bounce time CBt j exceeds the closing bounce adjustment threshold CBr j and does not exceed the closing bounce protection threshold CBp j, performing current control correction on a time period corresponding to a current curve of the closing coil according to the time period of the actual closing bounce time CBt j,
If the actual closing bounce time CBt j exceeds the closing bounce protection threshold CBp j, performing current control reset on a time period corresponding to a current curve of the closing coil according to the time period of the actual closing bounce time CBt j.
In the above embodiment, the period corresponding to the current curve of the closing coil subjected to the current control correction or reset is a period from the coil current peak value before the closing action bounces to the next coil current valley value.
In this embodiment, the current control correction includes: calculating the maximum amplitude value of the contact bounce to be corrected according to the displacement action curve of the contact in the last closing process of the vacuum circuit breaker，
Constructing a correction function: (1),
In the formula (1), the amino acid sequence of the formula (1),In order to correct the coefficient of the coefficient,＜0，The bounce amplitude is allowed for the contact,For the time of energizing the coil,Is a constant;
The correction function is processed Superimposed on the current profile of the closing coil for the respective time period.
In this embodiment, the time period for correcting the current curve of the closing coil is a time period from the nearest current peak value to the next current valley value before the closing bounce action; the correction coefficientThe value range of the (E) is-1.80 to-1.20.
In this embodiment, the current control reset includes: the corresponding time period of the current curve of the closing coil is prolonged, the prolonged time is a multiple of the actual closing bounce time CBt j,
Constructing a reset function(2),
In the formula (2), the amino acid sequence of the formula (2),A is more than 0 and less than 1 for resetting coefficient,Time period to be reset for closing coil current curve and≥1，The initial current value for the time period to be reset for the closing coil current profile.
In this embodiment, the extended time is 3 to 5 times of the actual closing bounce time CBt j.
In this embodiment, during the adjustment of the control strategy for the next closing of the vacuum circuit breaker, the correction and the reset of the historical action information of the closing coil are performed independently.
In order to better understand the technical scheme of the invention, the implementation description is carried out here:
Referring to fig. 2 and fig. 3, it can be seen from fig. 2 that two closing springs exist in the closing process of the vacuum circuit breaker, wherein the first closing spring exceeds a first closing spring protection threshold, and the second closing spring exceeds a second closing spring adjustment threshold but does not exceed a second closing spring protection threshold, so that corresponding time periods in the closing coil current graphs are respectively adjusted.
As shown in fig. 4, the reset and correction are performed on the basis of the current control of the original closing coil; as shown in fig. 5, in the next closing process of the vacuum circuit breaker, it is obvious that only one closing bounce exists in the closing process, and the amplitude and time of the closing bounce are greatly reduced.
According to the invention, the switching-on bounce adjusting threshold value and the switching-on bounce protecting threshold value are set, analysis of contact historical displacement information, in particular extraction of actual switching-on bounce time, enables analysis of a switching-on process to be deeper, further enables action strategies of switching-on coils to be adjusted according to the actual bounce time, improves switching-on precision and stability, enables a vacuum circuit breaker to realize more optimized switching-on operation under different conditions by self-adaptive adjustment capability, reduces unnecessary bounce and impact, is beneficial to reducing mechanical abrasion and electrical loss of equipment, and prolongs service life of the vacuum circuit breaker.
Example 2
Referring to fig. 6, the technical solution of the present invention is an electronic device, including a memory 20 and a processor 10, where the memory 20 stores a computer program, and the processor 10 implements the steps of the adaptive closing method of a vacuum circuit breaker described in embodiment 1 when executing the computer program.
Example 3
The technical solution of the present invention is a storage medium, on which computer program instructions are stored, which when executed by a processor implement the steps of the adaptive closing method of a vacuum circuit breaker described in embodiment 1.
In the description, each embodiment is described in a progressive manner, and each embodiment is mainly described by the differences from other embodiments, so that the same similar parts among the embodiments are mutually referred.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The self-adaptive closing method of the vacuum circuit breaker is characterized by comprising the following steps of:
Acquiring closing bounce protection information, closing coil historical action information and contact historical displacement information; the closing bounce protection information comprises a closing bounce adjustment threshold and a closing bounce protection threshold;
Extracting actual closing bounce time of the contact history displacement information according to the contact history displacement information;
If the actual closing bounce time does not exceed the closing bounce adjustment threshold, taking the historical action information of the closing coil as a control strategy of the vacuum circuit breaker for closing next time;
If the actual closing bounce time exceeds the closing bounce adjustment threshold and does not exceed the closing bounce protection threshold, correcting the historical action information of the closing coil, and taking the corrected historical action information of the closing coil as a control strategy of the vacuum circuit breaker for closing next time;
And if the actual closing bounce time exceeds the closing bounce protection threshold, resetting the historical action information of the closing coil, and taking the reset historical action information of the closing coil as a control strategy of the next closing of the vacuum circuit breaker.
2. The adaptive closing method of a vacuum circuit breaker according to claim 1, wherein the historical action information of the closing coil is a current curve of the closing coil in the last closing process of the vacuum circuit breaker; the historical displacement information of the contact is a displacement action curve of the contact in the last closing process of the vacuum circuit breaker.
3. The adaptive closing method of a vacuum circuit breaker according to claim 2, wherein a displacement peak point position Pd i of a contact in a last closing process of the vacuum circuit breaker is sequentially determined according to a time axis sequence according to the displacement action curve of the contact, wherein i is a number of the displacement peak point position, and i is more than or equal to 2; traversing the time difference between the adjacent displacement peak point positions Pd i, and sequentially taking the time difference as the actual closing bounce time CBt j, wherein j is the number of the actual closing bounce time, and j is more than or equal to 1.
4. The adaptive closing method of vacuum circuit breaker according to claim 3, wherein the closing bounce adjustment threshold CBr j is preset, and the closing bounce protection threshold CBp j is preset, wherein j is greater than or equal to 1;
Based on the number j of the actual closing bounce times CBt j, comparing the actual closing bounce times CBt j with the closing bounce adjustment threshold CBr j and the closing bounce protection threshold CBp j one by one respectively,
If any of the actual closing bounce times CBt j does not exceed the corresponding closing bounce adjustment threshold CBr j, taking the current curve of the closing coil in the last closing process as a control strategy of the next closing of the vacuum circuit breaker,
If the actual closing bounce time CBt j exceeds the closing bounce adjustment threshold CBr j and does not exceed the closing bounce protection threshold CBp j, performing current control correction on a time period corresponding to a current curve of the closing coil according to the time period of the actual closing bounce time CBt j,
If the actual closing bounce time CBt j exceeds the closing bounce protection threshold CBp j, performing current control reset on a time period corresponding to a current curve of the closing coil according to the time period of the actual closing bounce time CBt j.
5. The adaptive closing method of a vacuum interrupter as defined in claim 4, wherein the current control correction comprises: calculating the maximum amplitude value of the contact bounce to be corrected according to the displacement action curve of the contact in the last closing process of the vacuum circuit breakerConstructing a correction functionIn which, in the process,In order to correct the coefficient of the coefficient,＜0，The bounce amplitude is allowed for the contact,For the time of energizing the coil,Is a constant; the correction function is processedSuperimposed on the current profile of the closing coil for the respective time period.
6. The adaptive closing method of vacuum circuit breaker according to claim 5, wherein the time period for correcting the current curve of the closing coil is the time period from the nearest current peak to the next current valley before the closing bounce operation; the correction coefficientThe value range of the (E) is-1.80 to-1.20.
7. The adaptive closing method of a vacuum interrupter as defined in claim 4, wherein the current control reset comprises: prolonging the corresponding time period of the current curve of the closing coil, wherein the prolonged time is a multiple of the actual closing bounce time CBt j, and constructing a reset functionIn which, in the process,A is more than 0 and less than 1 for resetting coefficient,Time period to be reset for closing coil current curve and≥1，The initial current value for the time period to be reset for the closing coil current profile.
8. The adaptive closing method of a vacuum circuit breaker according to any one of claims 1 to 7, wherein the correction and the reset of the closing coil history action information are independently performed during the adjustment of the control strategy for the next closing of the vacuum circuit breaker.
9. An electronic device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the vacuum interrupter adaptive closing method of any one of claims 1 to 8.
10. A storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the vacuum interrupter adaptive closing method of any one of claims 1 to 8.
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| CN101127283A (en) * | 2007-06-08 | 2008-02-20 | 西安交通大学 | Low voltage electrical appliance intelligent control method based on current-varying mode |
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