CN116013744A - Tripping control method and device of circuit breaker and electronic equipment - Google Patents
Tripping control method and device of circuit breaker and electronic equipment Download PDFInfo
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- CN116013744A CN116013744A CN202310164710.7A CN202310164710A CN116013744A CN 116013744 A CN116013744 A CN 116013744A CN 202310164710 A CN202310164710 A CN 202310164710A CN 116013744 A CN116013744 A CN 116013744A
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Abstract
The application discloses a tripping control method and device of a circuit breaker and electronic equipment, wherein the method and the device are applied to the electronic equipment of the circuit breaker, and particularly acquire a current value of a single-phase circuit in the circuit breaker; detecting zero crossing time of the single-phase circuit according to the current value; and controlling the circuit breaker to execute the circuit breaking operation at a preset time point before the next zero crossing time. Through the operation, the circuit breaker can execute the circuit breaking operation when the current crosses zero, and the arc striking energy of the circuit breaker can be minimized, so that the ablation of the silver point of the circuit breaker can be reduced, and further the service life of the circuit breaker is improved.
Description
Technical Field
The present disclosure relates to the field of power equipment technologies, and in particular, to a trip control method and apparatus for a circuit breaker, and an electronic device.
Background
The circuit breaker is an important component of an electric power facility, and needs to keep stable and safe operation for a long time, so that the main reason influencing the service life of the circuit breaker is that the impact of a moving contact and a fixed contact and arc ablation during opening and closing are generally unavoidable, but the service life of the circuit breaker can be improved through ablation. While the improvement in service life is currently achieved substantially only by means of modification of the structure, e.g. modification of the contact material, etc., this approach inevitably increases the cost of the product.
Disclosure of Invention
In view of the above, the present application provides a trip control method, apparatus and electronic device for a circuit breaker, which are used for improving the service life of the circuit breaker without increasing the product cost.
In order to achieve the above object, the following solutions have been proposed:
a trip control method applied to an electronic device of a circuit breaker, the trip control method comprising the steps of:
acquiring a current value of a single-phase circuit in the circuit breaker;
detecting zero crossing time of the single-phase circuit according to the current value;
and controlling the circuit breaker to execute the circuit breaking operation at a preset time point before the zero crossing time.
Optionally, the detecting the zero crossing time of the single-phase circuit according to the current value includes the steps of:
judging the current value according to a preset threshold value;
and when the current value is smaller than the preset threshold value, judging whether the absolute value of the current value is reduced below the preset threshold value, and if the absolute value is reduced below the preset threshold value, judging that the current time is the zero crossing time.
Optionally, the difference between the preset time point and the zero crossing time point is the execution duration of the circuit breaker.
Optionally, the step of controlling the circuit breaker to execute the circuit breaking operation at a preset time point before the next zero crossing time includes the steps of:
and if the circuit breaker is a multi-phase circuit breaker, controlling the circuit breaker to execute short-circuit operation according to zero crossing time of the single-phase circuit of each phase.
A trip control apparatus applied to an electronic device of a circuit breaker, the trip control apparatus comprising:
a current acquisition module configured to acquire a current value of a single-phase circuit in the circuit breaker;
a zero-crossing detection module configured to detect a zero-crossing time of the single-phase circuit from the current value;
and the control execution module is configured to control the circuit breaker to execute the circuit breaking operation at a preset time point before the zero crossing time.
Optionally, the zero-crossing detection module includes:
the first detection unit is configured to judge the current value according to a preset threshold value;
and a second detection unit configured to determine whether an absolute value of the current value decreases below the preset threshold when the current value is smaller than the preset threshold, and determine that the current time is the zero-crossing time when the change rate is smaller than the preset change rate if the absolute value decreases below the preset threshold.
Optionally, the difference between the preset time point and the zero crossing time point is the execution duration of the circuit breaker.
Optionally, the control execution module is configured to control the circuit breaker to execute the short-circuit operation according to zero crossing time of the single-phase circuit in sequence if the circuit breaker is a multi-phase circuit breaker.
An electronic device for use with a circuit breaker, optionally comprising at least one processor and a memory coupled to the processor, wherein:
the memory is used for storing a computer program or instructions;
the processor is configured to execute the computer program or instructions to cause the electronic device to implement the trip control method as described above.
As can be seen from the above technical solution, the present application discloses a method, an apparatus and an electronic device for controlling tripping of a circuit breaker, where the method and the apparatus are applied to the electronic device of the circuit breaker, specifically, the method and the apparatus are used for obtaining a current value of a single-phase circuit in the circuit breaker; detecting zero crossing time of the single-phase circuit according to the current value; and controlling the circuit breaker to execute the circuit breaking operation at a preset time point before the next zero crossing time. Through the operation, the circuit breaker can execute the circuit breaking operation when the current crosses zero, and the arc striking energy of the circuit breaker can be minimized, so that the ablation of the silver point of the circuit breaker can be reduced, and further the service life of the circuit breaker is improved.
In addition, the scheme does not need to add hardware equipment, namely the service life of the circuit breaker can be improved on the basis of not needing to input hardware cost.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a trip control method according to an embodiment of the present application;
FIG. 2 is a schematic illustration of an optimal zero crossing point according to an embodiment of the present application;
fig. 3 is a trip timing diagram of a circuit breaker according to an embodiment of the present application;
fig. 4 is a block diagram of a trip control apparatus according to an embodiment of the present application;
fig. 5 is a block diagram of another trip control apparatus according to an embodiment of the present application;
fig. 6 is a block diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
Example 1
Fig. 1 is a flowchart of a trip control method according to an embodiment of the present application.
As shown in fig. 1, the trip control method provided in this embodiment is applied to a circuit breaker, specifically to an electronic device on the circuit breaker, where the electronic device may be understood as a controller, a single-chip microcomputer, and an embedded device having data computing capability, information processing capability, and control capability, and the trip control method specifically includes the following steps:
s1, acquiring a current value of a single-phase circuit in the circuit breaker.
The current value of the single-phase circuit is detected by a current detection circuit arranged in the circuit breaker and is output to the electronic equipment, so that the acquisition of the current value is realized. And acquiring a current value of the single-phase circuit if the circuit breaker is a single-phase circuit breaker, and acquiring a current value of each phase circuit if the circuit breaker is a multi-phase circuit breaker.
S2, detecting zero crossing time of the single-phase circuit according to the current value.
Namely, after the zero crossing time of one or more phases of circuits is obtained, the zero crossing time of the single-phase or each phase of circuit is judged according to the zero crossing time, and the specific judging method comprises the following steps:
firstly, the current value is judged according to a preset threshold value, namely the current value of the single-phase circuit or each phase circuit is compared with the preset threshold value, and the preset threshold value can be determined according to the specific model and parameters of the circuit breaker or is determined through actual detection.
And then, after judging that the current value is smaller than a preset threshold value, further judging whether the absolute value of the current value is reduced below the preset threshold value, and if so, determining that the moment is the zero crossing moment of the phase circuit. The reason for this is that the ac current is characterized in that it is a positive current in one half period and a negative current in the other half period, and the current decrease is numerically increased, and the actual current decrease is determined by the judgment of the absolute value.
In addition, in order to maintain the zero-crossing timing with sufficient accuracy, the zero-crossing timing may be detected in a plurality of consecutive periods.
And S3, controlling the circuit breaker to execute the circuit breaking operation according to the zero crossing time.
When the circuit breaker needs to be subjected to the circuit breaking operation, selecting the next zero crossing time of the current time, and outputting a circuit breaking control signal at a preset time before the zero crossing time, wherein the circuit breaking control signal is used for controlling the circuit breaker to break. The difference between the preset time point and the zero crossing time point is the execution time length of the circuit breaker, so that the zero crossing time point is guaranteed to be well when the silver point is disconnected. The preset rate of change is also determined based on the specific model and parameters of the circuit breaker, or by actual detection.
If the circuit breaker is a multiphase circuit breaker, a plurality of zero crossing moments can be naturally obtained, and in order to ensure the balance of ablation of a plurality of silver points, when the circuit breaking operation is executed, the circuit breaking operation can be executed on the circuit breaker according to the zero crossing moment of each phase of circuit in sequence, so that the silver points keep balanced.
Taking a 4P product as an example, as shown in fig. 2, no matter what angle is cut off, the change amplitude of the three-phase total current value is smaller, but the three-phase residual arcing time is larger, wherein the looping position is the optimal tripping point with the minimum total current value and total arcing time, and as long as the tripping is carried out at the points, the arcing energy of the circuit breaker can be minimized, the ablation of the contact of the circuit breaker can be reduced, and the service life of the product is prolonged.
The optimal tripping points are zero points with reduced absolute values of A, B, C-phase currents respectively, and as the circuit breaker cannot be tripped in a split phase manner, the multiphase circuit breaker needs to be tripped in a rotating phase manner to ensure the service life, and the state balance of each phase of silver points is ensured.
In addition, as shown in fig. 3, after the zero crossing point is confirmed for the second time, after the delay of N2 (zero crossing time) -N3 (mechanical action time), a tripping command is sent out, so that the damage of the silver point can be balanced, the phenomenon that the circuit breaker reaches the end of the service life in advance due to serious single-phase ablation can be avoided, and the effect is mainly realized through multiphase alternate zero switching.
As can be seen from the above technical solution, the present embodiment provides a trip control method, which is applied to an electronic device of a circuit breaker, and specifically obtains a current value of a single-phase circuit in the circuit breaker; detecting zero crossing time of the single-phase circuit according to the current value; and controlling the circuit breaker to execute the circuit breaking operation at a preset time point before the next zero crossing time. Through the operation, the circuit breaker can execute the circuit breaking operation when the current crosses zero, and the arc striking energy of the circuit breaker can be minimized, so that the ablation of the silver point of the circuit breaker can be reduced, and further the service life of the circuit breaker is improved.
In addition, the scheme of this application can improve product life under the condition that does not add the cost, and this scheme compatible product wide range, can adapt to the more extensive mass production circuit breaker.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Although operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order. In certain circumstances, multitasking and parallel processing may be advantageous.
It should be understood that the various steps recited in the method embodiments of the present disclosure may be performed in a different order and/or performed in parallel. Furthermore, method embodiments may include additional steps and/or omit performing the illustrated steps. The scope of the present disclosure is not limited in this respect.
Computer program code for carrying out operations of the present disclosure may be written in one or more programming languages, including, but not limited to, an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the C-language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of remote computers, the remote computer may be connected to the user computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer.
Example two
Fig. 4 is a block diagram of a trip control apparatus according to an embodiment of the present application.
As shown in fig. 4, the trip control apparatus provided in this embodiment is applied to a circuit breaker, specifically, an electronic device on the circuit breaker, where the electronic device may be understood as a controller, a single chip microcomputer, and an embedded device having data computing capability, information processing capability, and control capability, and the trip control apparatus specifically includes a current acquisition module 10, a zero crossing detection module 20, and a control execution module 30.
The current acquisition module is used for acquiring a current value of a single-phase circuit in the circuit breaker.
The current value of the single-phase circuit is detected by a current detection circuit arranged in the circuit breaker and is output to the electronic equipment, so that the acquisition of the current value is realized. And acquiring a current value of the single-phase circuit if the circuit breaker is a single-phase circuit breaker, and acquiring a current value of each phase circuit if the circuit breaker is a multi-phase circuit breaker.
The zero-crossing detection module is used for detecting zero-crossing time of the single-phase circuit according to the current value.
I.e. after the zero crossing time of the one or more phases of the circuit is obtained, the zero crossing time of the single-phase or each phase of the circuit is determined from the zero crossing time, the module comprising a first detection unit 21 and a second detection unit 22, as shown in fig. 5.
The first detection unit is used for judging the current value according to a preset threshold value, namely comparing the current value of the single-phase circuit or each phase circuit with the preset threshold value, wherein the preset threshold value can be determined according to the specific model and parameters of the circuit breaker or is determined through actual detection.
The second detecting unit is used for further judging whether the absolute value of the current value is reduced below the preset threshold value or not after the first detecting unit judges that the current value is smaller than the preset threshold value, and if so, determining that the moment is the zero crossing moment of the phase circuit. The reason for this is that the ac current is characterized in that it is a positive current in one half period and a negative current in the other half period, and the current decrease is numerically increased, and the actual current decrease is determined by the judgment of the absolute value.
In addition, in order to maintain the zero-crossing timing with sufficient accuracy, the zero-crossing timing may be detected in a plurality of consecutive periods.
The control execution module is used for controlling the circuit breaker to execute the circuit breaking operation according to the zero crossing time.
When the circuit breaker needs to be subjected to the circuit breaking operation, selecting the next zero crossing time of the current time, and outputting a circuit breaking control signal at a preset time before the zero crossing time, wherein the circuit breaking control signal is used for controlling the circuit breaker to break. The difference between the preset time point and the zero crossing time point is the execution time length of the circuit breaker, so that the zero crossing time point is guaranteed to be well when the silver point is disconnected. The preset rate of change is also determined based on the specific model and parameters of the circuit breaker, or by actual detection.
If the circuit breaker is a multiphase circuit breaker, a plurality of zero crossing moments can be naturally obtained, and in order to ensure the balance of ablation of a plurality of silver points, when the circuit breaking operation is executed, the circuit breaking operation can be executed on the circuit breaker according to the zero crossing moment of each phase of circuit in sequence, so that the silver points keep balanced.
As can be seen from the above technical solution, the present embodiment provides a trip control device, which is applied to an electronic device of a circuit breaker, and specifically obtains a current value of a single-phase circuit in the circuit breaker; detecting zero crossing time of the single-phase circuit according to the current value; and controlling the circuit breaker to execute the circuit breaking operation at a preset time point before the next zero crossing time. Through the operation, the circuit breaker can execute the circuit breaking operation when the current crosses zero, and the arc striking energy of the circuit breaker can be minimized, so that the ablation of the silver point of the circuit breaker can be reduced, and further the service life of the circuit breaker is improved.
The units involved in the embodiments of the present disclosure may be implemented by means of software, or may be implemented by means of hardware. The name of the unit does not in any way constitute a limitation of the unit itself, for example the first acquisition unit may also be described as "unit acquiring at least two internet protocol addresses".
The functions described above herein may be performed, at least in part, by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: a Field Programmable Gate Array (FPGA), an Application Specific Integrated Circuit (ASIC), an Application Specific Standard Product (ASSP), a system on a chip (SOC), a Complex Programmable Logic Device (CPLD), and the like.
Example III
Fig. 6 is a block diagram of an electronic device according to an embodiment of the present application.
As shown in fig. 6, the electronic device may be understood as a controller, a single chip microcomputer, and an embedded device having data computing capability, information processing capability, and control capability. The electronic device in fig. 6 is merely an example, and should not impose any limitations on the functionality and scope of use of embodiments of the present disclosure.
The electronic device includes a processing means (e.g., a central processing unit, a graphics processor, etc.) 601 that can perform various appropriate actions and processes according to a program stored in a Read Only Memory (ROM) 602 or a program loaded from a storage means 608 into a Random Access Memory (RAM) 603. In the RAM603, various programs and data required for the operation of the electronic apparatus 600 are also stored. The processing device 601, the ROM 602, and the RAM603 are connected to each other through a bus 604. An input/output (I/O) interface 605 is also connected to bus 604.
In general, the following devices may be connected to the I/O interface 605: input devices 606 including, for example, a touch screen, touchpad, keyboard, mouse, camera, microphone, accelerometer, gyroscope, and the like; an output device 607 including, for example, a Liquid Crystal Display (LCD), a speaker, a vibrator, and the like; storage 608 including, for example, magnetic tape, hard disk, etc.; and a communication device 609. The communication means 609 may allow the electronic device to communicate with other devices wirelessly or by wire to exchange data.
Readable storage medium embodiments
The computer readable medium carries one or more programs which, when executed by the electronic device, cause the electronic device to:
in this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it is further noted that 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 terminal 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 terminal. 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 terminal device comprising the element.
The foregoing has outlined rather broadly the more detailed description of the invention in order that the detailed description of the invention that follows may be better understood, and in order that the present principles and embodiments may be better understood; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
Claims (9)
1. The tripping control method is applied to the electronic equipment of the circuit breaker and is characterized by comprising the following steps:
acquiring a current value of a single-phase circuit in the circuit breaker;
detecting zero crossing time of the single-phase circuit according to the current value;
and controlling the circuit breaker to execute the circuit breaking operation at a preset time point before the zero crossing time.
2. The trip control method according to claim 1, wherein said detecting a zero crossing time of said single-phase circuit from said current value includes the steps of:
judging the current value according to a preset threshold value;
and when the current value is smaller than the preset threshold value, judging whether the absolute value of the current value is reduced below the preset threshold value, and if the absolute value is reduced below the preset threshold value, judging that the current time is the zero crossing time.
3. The trip control method of claim 1, wherein a difference between the preset time point and the zero crossing time point is an execution duration of the circuit breaker.
4. The trip control method of claim 1, wherein the predetermined time point before the next zero crossing time point controls the circuit breaker to perform a breaking operation, comprising the steps of:
and if the circuit breaker is a multi-phase circuit breaker, controlling the circuit breaker to execute short-circuit operation according to zero crossing time of the single-phase circuit of each phase.
5. A trip control apparatus applied to an electronic device of a circuit breaker, the trip control apparatus comprising:
a current acquisition module configured to acquire a current value of a single-phase circuit in the circuit breaker;
a zero-crossing detection module configured to detect a zero-crossing time of the single-phase circuit from the current value;
and the control execution module is configured to control the circuit breaker to execute the circuit breaking operation at a preset time point before the zero crossing time.
6. The trip control device of claim 5, wherein said zero crossing detection module comprises:
the first detection unit is configured to judge the current value according to a preset threshold value;
and a second detection unit configured to determine whether an absolute value of the current value decreases below the preset threshold value when the current value is smaller than the preset threshold value, and determine that the current time is the zero-crossing time if the absolute value decreases below the preset threshold value.
7. The trip control apparatus of claim 5, wherein a difference between the preset time point and the zero crossing time point is an execution duration of the circuit breaker.
8. The trip control apparatus of claim 5, wherein the control execution module is configured to control the circuit breaker to perform a short circuit operation in accordance with zero crossing times of the single-phase circuit for each phase in turn if the circuit breaker is a multi-phase circuit breaker.
9. An electronic device for use with a circuit breaker, the electronic device comprising at least one processor and a memory coupled to the processor, wherein:
the memory is used for storing a computer program or instructions;
the processor is configured to execute the computer program or instructions to cause the electronic device to implement the trip control method according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310164710.7A CN116013744A (en) | 2023-02-10 | 2023-02-10 | Tripping control method and device of circuit breaker and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310164710.7A CN116013744A (en) | 2023-02-10 | 2023-02-10 | Tripping control method and device of circuit breaker and electronic equipment |
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| CN116013744A true CN116013744A (en) | 2023-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310164710.7A Pending CN116013744A (en) | 2023-02-10 | 2023-02-10 | Tripping control method and device of circuit breaker and electronic equipment |
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| CN (1) | CN116013744A (en) |
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