Circuit breaker control method and system

Abstract

The invention discloses a circuit breaker control method and system. The method comprises the steps that when a protection value adjusting instruction is received or in each protection value adjusting period, if operation information of the circuit breaker contains tripping information, an initial protection value of the circuit breaker is increased according to a tripping current growth rate, and a first target protection value is obtained; wherein the tripping information at least comprises a tripping current and a tripping type; if the operation information of the circuit breaker does not contain the tripping information, reducing the initial protection value of the circuit breaker according to the protection value growth rate to obtain a second target protection value; and if a receiving instruction for receiving the first target protection value or the second target protection value is received, the first target protection value or the second target protection value is sent to the circuit breaker, so that the circuit breaker is disconnected when the current of the circuit breaker reaches the first target protection value or the second target protection value. According to the technical scheme, the control accuracy of the circuit breaker is improved, the set protection value is more reasonable, and lines and equipment can be better protected.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and in particular to a circuit breaker control method and system. Background Art

[0002] Circuit breakers are widely used in low-voltage power distribution networks and in a variety of industrial, commercial and civil applications. Circuit breakers can be disconnected when a line or equipment fails, protecting the line and equipment from overload, short circuit, undervoltage, overvoltage and other faults.

[0003] When installing a circuit breaker, protection parameters will be set in the circuit breaker, and once the protection parameters are set, they will not be changed. When the set protection parameters are too low, the operating current of the circuit breaker will easily reach the set protection parameters, resulting in the problem of frequent triggering of the tripping protection, affecting normal power consumption. When the set protection parameters are too high, when a fault occurs in the line where the circuit breaker is located or the connected equipment, such as a line short circuit, the short-circuit current may not reach the set protection parameters, causing the circuit breaker to fail to trip in time, that is, fail to disconnect in time, and thus fail to protect the line or connected equipment. Therefore, the existing circuit breakers have the problem of unreasonable protection parameter settings and are unable to better protect lines and equipment. Summary of the invention

[0004] The present invention provides a circuit breaker control method and system to solve the problem that the protection parameter setting of the circuit breaker is unreasonable and the circuit and equipment cannot be well protected.

[0005] According to one aspect of the present invention, a circuit breaker control method is provided, the circuit breaker control method comprising:

[0006] When receiving a protection value adjustment instruction, or in each protection value adjustment cycle, if the operation information of the circuit breaker includes tripping information, the initial protection value of the circuit breaker is increased according to the tripping current growth rate to obtain a first target protection value; wherein the tripping information includes at least a tripping current and a tripping type;

[0007] If the operation information of the circuit breaker does not include the tripping information, reducing the initial protection value of the circuit breaker according to the protection value growth rate to obtain a second target protection value;

[0008] If an acceptance instruction for accepting the first target protection value or the second target protection value is received, the first target protection value or the second target protection value is sent to the circuit breaker so that the circuit breaker is disconnected when the current of the circuit breaker reaches the first target protection value or the second target protection value.

[0009] Optionally, increasing the initial protection value of the circuit breaker according to the trip current growth rate to obtain a first target protection value includes:

[0010] Determine the average tripping current of the circuit breaker according to at least one target tripping current within a preset time and the number of trippings corresponding to the target tripping current; wherein the preset time is the time of the adjustment cycle or the preset time in the adjustment instruction; the target tripping current is the tripping current corresponding to the overload type of the tripping type;

[0011] The trip current growth rate is determined according to the average trip current and the initial protection value, and the initial protection value is increased according to the trip current growth rate to obtain the first target protection value.

[0012] Optionally, determining the tripping current growth rate according to the average tripping current and the initial protection value includes:

[0013] The trip current growth rate is obtained by subtracting the initial protection value from the average trip current and dividing the result by the initial protection value.

[0014] Optionally, increasing the initial protection value according to the trip current growth rate to obtain the first target protection value includes:

[0015] According to the sum of the tripping current growth rate and the first coefficient, the initial protection value is increased to obtain the first target protection value; wherein the first coefficient is greater than or equal to zero and less than 1.

[0016] Optionally, reducing the initial protection value of the circuit breaker according to the protection value growth rate to obtain a second target protection value includes:

[0017] Determine the average working current of the circuit breaker according to a preset time length and a plurality of working currents within the preset time length; wherein the preset time length is the time length of the adjustment cycle or the preset time length in the adjustment instruction;

[0018] The protection value growth rate is determined according to the average working current and the initial protection value, and the initial protection value is reduced according to the protection value growth rate to obtain the second target protection value.

[0019] Optionally, determining the protection value growth rate according to the average working current and the initial protection value includes:

[0020] The protection value growth rate is obtained by subtracting the average working current from the initial protection value and dividing the result by the initial protection value.

[0021] Optionally, reducing the initial protection value according to the protection value growth rate to obtain the second target protection value includes:

[0022] According to the sum of the protection value growth rate and the second coefficient, the initial protection value is reduced to obtain the second target protection value; wherein the second coefficient is greater than or equal to zero and less than the protection value growth rate.

[0023] Optionally, if the operation information of the circuit breaker includes tripping information, before increasing the initial protection value of the circuit breaker according to the tripping current growth rate to obtain the first target protection value, the method further includes:

[0024] Acquire historical operating parameters of the circuit breaker from the circuit breaker; wherein the historical operating parameters at least include the operating information, the initial protection value and the electrical parameters of the circuit breaker.

[0025] According to another aspect of the present invention, a circuit breaker control system is provided, the circuit breaker control system comprising: a server and a controller; the controller is used to execute the circuit breaker control method described in any embodiment of the present invention;

[0026] The server is connected to the circuit breaker, and the server is used to obtain the operation information of the circuit breaker;

[0027] The controller is connected to the server, and is used to obtain the tripping record from the server.

[0028] Optionally, the circuit breaker includes a control module, and the control module includes a wired communication unit and a wireless communication unit;

[0029] The wired communication unit and the wireless communication unit are connected to the server respectively.

[0030] The technical solution of the embodiment of the present invention is that when there is tripping information in the operation information of the circuit breaker, indicating that the circuit breaker has tripped, the initial protection value of the circuit breaker is set to be small, and the initial protection value is increased according to the tripping growth rate, and the first target protection value obtained is large, which can avoid the circuit breaker from frequently triggering the tripping. When there is no tripping information in the operation information of the circuit breaker, indicating that the circuit breaker has not tripped, the initial protection value of the circuit breaker is set to be large, and the initial protection value of the circuit breaker is reduced according to the protection value growth rate, and the second target protection value obtained is small, which can avoid the problem that the circuit breaker cannot trip in time. Thereby improving the accuracy of the circuit breaker control, making the set protection value more reasonable, and better protecting the lines and equipment.

[0031] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 is a flow chart of a circuit breaker control method provided by an embodiment of the present invention;

[0034] Figure 2 is a flow chart of another circuit breaker control method provided by an embodiment of the present invention;

[0035] Figure 3 is a flow chart of another circuit breaker control method provided by an embodiment of the present invention;

[0036] Figure 4 is a flow chart of another circuit breaker control method provided by an embodiment of the present invention;

[0037] Figure 5 is a current schematic diagram of a circuit breaker provided by an embodiment of the present invention;

[0038] Figure 6 is a current schematic diagram of another circuit breaker provided by an embodiment of the present invention;

[0039] Figure 7 is a structural schematic diagram of a circuit breaker control system provided by an embodiment of the present invention;

[0040] Figure 8 It is a structural schematic diagram of another circuit breaker control system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0042] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0043] The embodiment of the present invention provides a circuit breaker control method, the circuit breaker may be a universal circuit breaker or other types of circuit breakers, which are not limited in this embodiment. The circuit breaker control method may be executed by a controller, which may be a computer, a host computer or a mobile phone, etc., which are not limited in this embodiment.

[0044] Figure 1 is a flow chart of a circuit breaker control method provided by an embodiment of the present invention, with reference to Figure 1 , the circuit breaker control method includes:

[0045] S110. When receiving a protection value adjustment instruction, or in each protection value adjustment cycle, determine whether there is tripping information in the operation information of the circuit breaker. If so, execute step S120; if not, execute step S130.

[0046] The initial protection value is the protection value preset when the circuit breaker leaves the factory or is installed. When the user finds that the circuit breaker trips when the line is normal, or the circuit breaker cannot trip when the line is abnormal, the user will input or send a protection value adjustment instruction to the controller. The controller can adjust the initial protection value according to the protection value adjustment instruction received from the user input or sent, or it can adjust it once every period of time, that is, adjust the initial protection value in each protection value adjustment cycle.

[0047] Specifically, the circuit breaker stores operation information, and the controller can obtain the operation information of the circuit breaker. If the operation information stores tripping information, it indicates that the circuit breaker has tripped; if the operation information does not store tripping information, it indicates that the circuit breaker has not tripped. The circuit breaker tripping means that the circuit breaker automatically trips, that is, disconnects the line where the circuit breaker is located.

[0048] S120. Increase the initial protection value of the circuit breaker according to the tripping current growth rate to obtain a first target protection value; wherein the tripping information includes at least the tripping current and the tripping type.

[0049] Specifically, when there is tripping information in the operation information of the circuit breaker, indicating that the circuit breaker has tripped, the initial protection value of the circuit breaker is set to be small. By increasing the initial protection value according to the tripping growth rate, the first target protection value obtained is larger, which can avoid frequent tripping of the circuit breaker.

[0050] The tripping current growth rate can be determined based on the tripping information and the initial protection value. For example, based on the tripping type and the tripping current in the tripping information, the tripping current corresponding to the overload tripping type is selected, and the tripping current growth rate is calculated based on the tripping current corresponding to the overload tripping type and the initial protection value. By determining the tripping current growth rate, the difference between the tripping current and the initial protection value when the tripping occurs can be determined. Therefore, by increasing the initial protection value of the circuit breaker according to the tripping current growth rate, the first target protection value can be made close to the tripping current when the tripping occurs. The circuit breaker can then accurately determine whether to trip according to the first target protection value, thereby improving the accuracy of the circuit breaker control, making the set protection value more reasonable, and better protecting the lines and equipment.

[0051] The tripping information may further include the tripping time and the number of tripping times, etc., which are not limited in this embodiment.

[0052] S130. Reduce the initial protection value of the circuit breaker according to the protection value growth rate to obtain a second target protection value.

[0053] Specifically, when there is no tripping information in the operation information of the circuit breaker, it indicates that the circuit breaker has not tripped. In this case, the initial protection value of the circuit breaker is set larger. The initial protection value of the circuit breaker is reduced according to the protection value growth rate, and the obtained second target protection value is smaller, which can avoid the problem that the circuit breaker cannot trip in time.

[0054] The protection value growth rate can be determined based on the current and the initial protection value when the circuit breaker is working normally, so as to determine the difference between the initial protection value and the normal working current. Then, by reducing the initial protection value of the circuit breaker according to the protection value growth rate, the second target protection value can be made close to the current at the time of the fault. Then, the circuit breaker can accurately determine whether to trip according to the second target protection value, thereby improving the accuracy of circuit breaker control, making the set protection value more reasonable, and better protecting the lines and equipment.

[0055] S140. If an acceptance instruction for accepting the first target protection value or the second target protection value is received, the first target protection value or the second target protection value is sent to the circuit breaker, so that the circuit breaker is disconnected when the current of the circuit breaker reaches the first target protection value or the second target protection value.

[0056] Specifically, after determining the first target protection value or the second target protection value, the controller can output the first target protection value or the second target protection value. If an acceptance instruction for accepting the first target protection value or the second target protection value is received, the first target protection value or the second target protection value will be sent to the circuit breaker. In this way, the circuit breaker can determine whether a trip occurs, that is, whether to disconnect, based on the first target protection value or the second target protection value, thereby improving the accuracy of circuit breaker control. For example, when any phase current of the circuit breaker reaches the first target protection value or the second target protection value, the circuit breaker trips.

[0057] The technical solution of this embodiment is that when there is tripping information in the operation information of the circuit breaker, indicating that the circuit breaker has tripped, the initial protection value of the circuit breaker is set to be small, and the initial protection value is increased according to the tripping growth rate, and the first target protection value obtained is large, which can avoid the circuit breaker from frequently triggering the tripping. When there is no tripping information in the operation information of the circuit breaker, indicating that the circuit breaker has not tripped, the initial protection value of the circuit breaker is set to be large, and the initial protection value of the circuit breaker is reduced according to the protection value growth rate, and the second target protection value obtained is small, which can avoid the problem that the circuit breaker cannot trip in time. Thereby improving the accuracy of circuit breaker control, making the set protection value more reasonable, and better protecting the lines and equipment.

[0058] Based on the above technical solutions, Figure 2 is a flowchart of another circuit breaker control method provided by an embodiment of the present invention. Figure 2 , the circuit breaker control method includes:

[0059] S210. When receiving a protection value adjustment instruction, or in each protection value adjustment cycle, determine whether there is tripping information in the operation information of the circuit breaker. If so, execute step S220; if not, execute step S240.

[0060] S220. Determine the average tripping current of the circuit breaker according to at least one target tripping current within a preset time length and the number of tripping times corresponding to the target tripping current; wherein the preset time length is the length of the adjustment cycle or the preset time length in the adjustment instruction; and the target tripping current is the tripping current corresponding to the overload type of the tripping type.

[0061] Among them, the tripping current is the current of the circuit breaker when the tripping occurs. The tripping current can be a single-phase current, a three-phase current, or a four-phase circuit. It can be determined according to the line where the circuit breaker is located or the connected load, and this embodiment does not limit it. The reasons for the circuit breaker tripping may include short-circuit tripping, undervoltage tripping, and overload tripping. The target tripping current is the tripping current corresponding to the overload type, that is, the current when the circuit breaker trips overload. The number of tripping times is the number of tripping times corresponding to the target tripping current, that is, the number of times the circuit breaker trips overload within a preset time.

[0062] Specifically, if at least one trip occurs within a preset time, then at least one target trip current corresponds to the trip current. The at least one target trip current is summed and then divided by the corresponding number of trips to obtain the average trip current of the circuit breaker. When there is only one target trip current, the target trip current is the average trip current. In this way, it is convenient to correct the initial protection value according to the average trip current, and the first target protection value obtained can be more reasonable.

[0063] S230. Determine a tripping current growth rate according to the average tripping current and the initial protection value, and increase the initial protection value according to the tripping current growth rate to obtain a first target protection value.

[0064] Specifically, according to the difference between the average tripping current and the initial protection value, the tripping current growth rate can be determined. The initial protection value can be added to the product of the initial protection value and the tripping current growth rate, and the initial protection value can be increased according to the tripping current growth rate. The obtained first target protection value is larger, which can avoid the problem of frequent tripping of the circuit breaker.

[0065] S240. Reduce the initial protection value of the circuit breaker according to the protection value growth rate to obtain a second target protection value.

[0066] S250. If an acceptance instruction for accepting the first target protection value or the second target protection value is received, the first target protection value or the second target protection value is sent to the circuit breaker, so that the circuit breaker is disconnected when the current of the circuit breaker reaches the first target protection value or the second target protection value.

[0067] On the basis of the above technical solution, optionally, the tripping current growth rate is determined according to the average tripping current and the initial protection value, including:

[0068] Subtract the difference between the average tripping current and the initial protection value and divide it by the initial protection value to get the tripping current growth rate.

[0069] Specifically, the difference between the average tripping current and the initial protection value is divided by the initial protection value to determine the difference rate between the average tripping current and the initial protection value, that is, the tripping current growth rate. In this way, the difference between the initial protection value and the average tripping current can be determined, so as to increase the initial protection value according to the ratio (tripping current growth rate).

[0070] Optionally, increasing the initial protection value according to the tripping current growth rate to obtain a first target protection value includes:

[0071] The initial protection value is increased according to the sum of the tripping current growth rate and the first coefficient to obtain a first target protection value; wherein the first coefficient is greater than or equal to zero and less than 1.

[0072] For example, the first coefficient is K1, then In this way, the first target protection value can be made slightly larger to avoid a large current when the load connected to the circuit breaker is turned on, so that the current of the circuit breaker reaches the first target protection value and trips, that is, to avoid malfunction of the circuit breaker, thereby further improving the accuracy of circuit breaker control.

[0073] The first coefficient may be a preset value or a value input by a user, which is not limited in this embodiment. Furthermore, after adjusting the initial protection value, if the first target protection value still cannot meet the demand, the controller may adjust the first coefficient to update the first target protection value, so that the updated first target protection value can better control whether the circuit breaker is tripped.

[0074] On the basis of the above technical solutions, Figure 3 is a flowchart of another circuit breaker control method provided by an embodiment of the present invention. Figure 3 , the circuit breaker control method includes:

[0075] S310. When receiving a protection value adjustment instruction, or in each protection value adjustment cycle, determine whether there is tripping information in the operation information of the circuit breaker. If so, execute step S320; if not, execute step S340.

[0076] S320. Determine the average tripping current of the circuit breaker according to at least one target tripping current within a preset time length and the number of tripping times corresponding to the target tripping current; wherein the preset time length is the time length of the adjustment cycle or the preset time length in the adjustment instruction; and the target tripping current is the tripping current corresponding to the overload type of the tripping type.

[0077] S330. Determine a tripping current growth rate according to the average tripping current and the initial protection value, and increase the initial protection value according to the tripping current growth rate to obtain a first target protection value.

[0078] S340. Determine an average operating current of the circuit breaker according to a preset time length and a plurality of operating currents within the preset time length; wherein the preset time length is the time length of an adjustment cycle or a preset time length in an adjustment instruction.

[0079] The working current is the current when the circuit breaker is working normally and no tripping occurs.

[0080] Specifically, when the circuit breaker is working, the working current of the circuit breaker can be obtained in real time or periodically, and multiple working currents can be obtained within a preset time period. The controller obtains multiple working currents within the preset time period from the circuit breaker, and sums up the multiple working currents and divides them by the preset time period to obtain the average working current within the preset time period.

[0081] For example, if the preset duration is m days (m is an integer greater than 1), then the average working current can be obtained by summing up multiple working currents within m days and dividing by m. For example, if the preset duration is 1 day, then the average working current can be obtained by summing up multiple working currents within 1 day and dividing by 24 hours or 1440 minutes.

[0082] S350, determining a protection value growth rate according to the average working current and the initial protection value, and reducing the initial protection value according to the protection value growth rate to obtain a second target protection value.

[0083] Specifically, based on the difference between the average working current and the initial protection value, the protection value growth rate can be determined. The initial protection value can be reduced according to the protection value growth rate by subtracting the product of the initial protection value and the protection value growth rate from the initial protection value. The obtained second target protection value is smaller, which can avoid the problem of the circuit breaker failing to trip in time.

[0084] S360. If an acceptance instruction for accepting the first target protection value or the second target protection value is received, the first target protection value or the second target protection value is sent to the circuit breaker so that the circuit breaker is disconnected when the current of the circuit breaker reaches the first target protection value or the second target protection value.

[0085] On the basis of the above technical solution, optionally, the protection value growth rate is determined according to the average working current and the initial protection value, including:

[0086] Subtract the difference between the initial protection value and the average working current and divide it by the initial protection value to get the protection value growth rate.

[0087] Specifically, the difference between the initial protection value and the average working current is subtracted and divided by the initial protection value to determine the difference rate between the initial protection value and the average working current, that is, the protection value growth rate. In this way, the difference between the initial protection value and the average working current can be determined, so as to reduce the initial protection value according to the ratio (protection value growth rate).

[0088] Optionally, reducing the initial protection value according to the protection value growth rate to obtain a second target protection value includes:

[0089] According to the sum of the protection value growth rate and the second coefficient, the initial protection value is reduced to obtain the second target protection value; wherein the second coefficient is greater than or equal to zero and less than the protection value growth rate.

[0090] Exemplarily, the second coefficient is K2, then In this way, the second target protection value can be made slightly larger to avoid a large current when the load connected to the circuit breaker is turned on, so that the current of the circuit breaker reaches the first target protection value and trips, that is, to avoid malfunction of the circuit breaker, thereby further improving the accuracy of circuit breaker control.

[0091] Furthermore, by setting the second coefficient to be greater than or equal to zero and less than the protection value growth rate, it is possible to avoid the initial protection value from increasing instead of decreasing, thereby ensuring that the initial protection value is reduced and preventing the circuit breaker from being unable to trip in time.

[0092] The second coefficient may be a preset value or a value input by a user, which is not limited in this embodiment. Furthermore, after adjusting the initial protection value, if the second target protection value still cannot meet the demand, the controller may adjust the second coefficient to update the second target protection value, so that the updated second target protection value can better control whether the circuit breaker is tripped.

[0093] On the basis of the above technical solutions, Figure 4 is a flowchart of another circuit breaker control method provided by an embodiment of the present invention. Figure 4 , the circuit breaker control method includes:

[0094] S410. Obtain historical operating parameters of the circuit breaker from the circuit breaker; wherein the historical operating parameters at least include operating information, initial protection values, and electrical parameters of the circuit breaker.

[0095] Specifically, the circuit breaker can store the historical operating parameters of the circuit breaker, and the controller can obtain the historical operating parameters of the circuit breaker from the circuit breaker before adjusting the initial protection value, so as to adjust the initial protection value. The electrical parameters of the circuit breaker may include the operating current of the circuit breaker, etc., which are not limited in this embodiment. In some other embodiments, the electrical parameters of the circuit breaker may also include the voltage, power, electric energy, harmonics and operating frequency of the circuit breaker.

[0096] In some embodiments, the circuit breaker control system includes a server, and the circuit breaker can send historical operating parameters stored in the circuit breaker to the server for storage in the server. The controller can read the historical operating parameters of the circuit breaker from the server when the historical operating parameters are needed.

[0097] S420. When receiving a protection value adjustment instruction, or in each protection value adjustment cycle, determine whether there is tripping information in the operation information of the circuit breaker. If so, execute step S430; if not, execute step S440.

[0098] S430. Increase the initial protection value of the circuit breaker according to the tripping current growth rate to obtain a first target protection value; wherein the tripping information at least includes the tripping current and the tripping type.

[0099] S440. Reduce the initial protection value of the circuit breaker according to the protection value growth rate to obtain a second target protection value.

[0100] S450. If an acceptance instruction for accepting the first target protection value or the second target protection value is received, the first target protection value or the second target protection value is sent to the circuit breaker, so that the circuit breaker is disconnected when the current of the circuit breaker reaches the first target protection value or the second target protection value.

[0101] For example, Figure 5 is a current schematic diagram of a circuit breaker provided by an embodiment of the present invention, such as Figure 5 As shown, the horizontal axis is time, the vertical axis is current value, curve ① is the first target protection value, curve ② is the A-phase working current curve of the circuit breaker, curve ③ is the B-phase working current curve of the circuit breaker, and curve ④ is the C-phase current curve of the circuit breaker. Figure 5 As shown, when the circuit breaker works normally, the working current is less than the first target protection value, which can avoid frequent tripping of the circuit breaker.

[0102] Figure 6 is another current schematic diagram of a circuit breaker provided by an embodiment of the present invention, such as Figure 6 As shown, the horizontal axis is time, the vertical axis is current value, curve ⑤ is the second target protection value, curve ⑥ is the A-phase working current curve of the circuit breaker, curve ⑦ is the B-phase working current curve of the circuit breaker, and curve ⑧ is the C-phase current curve of the circuit breaker. Figure 6 As shown, when the current of any phase of the circuit breaker is large, it exceeds the second target protection value, so that the circuit breaker can be tripped in time to better protect the line where the circuit breaker is located and the connected equipment.

[0103] The embodiment of the present invention further provides a circuit breaker control system. Figure 7 is a schematic diagram of a circuit breaker control system provided by an embodiment of the present invention, with reference to Figure 7 The circuit breaker control system includes: a server 10 and a controller 20; the controller 20 is used to execute the circuit breaker control method provided by any embodiment of the present invention; the server 10 is connected to the circuit breaker 30, and the server 10 is used to obtain the operation information of the circuit breaker 30; the controller 20 is connected to the server 10, and the controller 20 is used to obtain the operation information from the server 10.

[0104] Specifically, the controller 20 can be a computer, a host computer or a mobile phone, etc., and the server 10 can be a local hard disk of the computer, a USB flash drive or a cloud storage device, etc. By setting the server 10, the circuit breaker 30 can send the acquired operation information of the circuit breaker 30 to the server 10, so as to store it in the server 10, thereby avoiding the problem that the memory of the circuit breaker 30 is small and cannot store more information. Therefore, when it is necessary to adjust the initial protection value, the controller 20 can obtain the operation information of the circuit breaker 30 from the server 10, so as to adjust the initial protection value according to whether there is tripping information in the operation information. When the controller 20 determines that there is tripping information in the operation information of the circuit breaker 30, indicating that the circuit breaker 30 has been tripped, the initial protection value of the circuit breaker 30 is set to be small, and the controller 20 increases the initial protection value according to the tripping growth rate, and the first target protection value obtained is large, which can avoid the circuit breaker 30 from frequently triggering the tripping. When there is no tripping information in the operation information of the circuit breaker 30, it indicates that the circuit breaker 30 has not tripped, and the initial protection value of the circuit breaker 30 is set to be relatively large. The controller 20 reduces the initial protection value of the circuit breaker according to the protection value growth rate, and the obtained second target protection value is relatively small, which can avoid the problem that the circuit breaker cannot trip in time. Thereby improving the accuracy of the circuit breaker control, making the set protection value more reasonable, and better protecting the line and equipment.

[0105] Based on the above technical solutions, Figure 8 is a schematic diagram of the structure of another circuit breaker control system provided by an embodiment of the present invention. Figure 8 , the circuit breaker 30 includes a control module 301, and the control module 301 includes a wired communication unit 311 and a wireless communication unit 312;

[0106] The wired communication unit 311 and the wireless communication unit 312 are respectively connected to the server 10 .

[0107] The wireless communication unit 312 may include a WIFi communication circuit, a 4G communication circuit, or a 5G communication circuit. The wired communication unit 311 may include a network cable communication circuit or a bus communication circuit, and the bus communication circuit may be a controller area network bus (CAN) communication circuit. In this way, the circuit breaker 30 can communicate with the server 10 by wire and wirelessly, and information transmission between the circuit breaker 30 and the controller 20 is realized.

[0108] Optionally, refer to Figure 8The circuit breaker 30 further includes a sensor module 302, which includes a current transformer 321, a temperature sensor 322, and an environment monitoring sensor 323; the current transformer 321 is used to detect the current of the circuit breaker 30, the temperature sensor 322 is used to detect the busbar temperature on the input side of the circuit breaker 30, and the environment monitoring sensor 323 is used to detect the ambient temperature and humidity. In this way, the working parameters and working environment of the circuit breaker 322 can be detected.

[0109] Optionally, refer to Figure 8 The control module 301 also includes a sampling circuit 313, a control unit 314, a drive circuit 315 and a storage unit 316; the sampling circuit 313 is connected to the sensor module 302, and the sampling circuit 313 is used to obtain the sensor information collected by the sensor module 302; the sensor information at least includes the current, busbar temperature, ambient temperature and ambient humidity of the circuit breaker 30; the control unit 314 is used to send the sensor information collected by the sampling circuit 313 to the storage unit 316, and transmit the electrical parameters of the circuit breaker 30 stored in the storage unit 316 to the wired communication unit 311 and the wireless communication unit 312; the control unit 314 is connected to the drive circuit 315, and the control unit 314 is used to obtain the first target protection value or the second target protection value sent by the controller 20 through the wired communication unit 311 and the wireless communication unit 312, and control the drive signal output by the drive circuit 315 according to the first target protection value or the second target protection value.

[0110] Optionally, refer to Figure 8 The circuit breaker 30 also includes a circuit breaker body 303, which includes an electric operating mechanism 331, a closing mechanism 332, an opening mechanism 333 and an operating mechanism 334; a drive circuit 315 is connected to the electric operating mechanism 331, the closing mechanism 332 and the opening mechanism 333 respectively, and the drive circuit 315 is used to output a drive signal to the electric operating mechanism 331, the closing mechanism 332 and the opening mechanism 333, so that the electric operating mechanism 331, the closing mechanism 332 and the opening mechanism 333 drive the operating mechanism 334 to close or open. Among them, the electric operating mechanism 331 may include a motor operating mechanism, and the operating mechanism 334 may be a spring operating mechanism. The spring operating mechanism uses the energy stored by the extension and contraction of the spring to control the closing and opening. The storage of the spring energy is transmitted by the motor operating mechanism, that is, the motor operating mechanism can control the extension and contraction of the spring in the spring operating mechanism, so as to realize the opening or closing. The driving circuit 315 can transmit a driving signal to the opening mechanism 333, and the opening mechanism 333 controls the operating mechanism 334 to open the switch. The driving circuit 315 can transmit a driving signal to the closing mechanism 332, and the closing mechanism 332 controls the operating mechanism 334 to close the switch.

[0111] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0112] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A circuit breaker control method, characterized in that: include: When receiving a protection value adjustment instruction, or in each protection value adjustment cycle, if the operation information of the circuit breaker includes tripping information, the initial protection value of the circuit breaker is increased according to the tripping current growth rate to obtain a first target protection value; wherein the tripping information includes at least a tripping current and a tripping type; If the operation information of the circuit breaker does not include the tripping information, reducing the initial protection value of the circuit breaker according to the protection value growth rate to obtain a second target protection value; If an acceptance instruction for accepting the first target protection value or the second target protection value is received, the first target protection value or the second target protection value is sent to the circuit breaker so that the circuit breaker is disconnected when the current of the circuit breaker reaches the first target protection value or the second target protection value.

2. The method according to claim 1, characterized in that The step of increasing the initial protection value of the circuit breaker according to the trip current growth rate to obtain a first target protection value includes: Determine the average tripping current of the circuit breaker according to at least one target tripping current within a preset time and the number of trippings corresponding to the target tripping current; wherein the preset time is the time of the adjustment cycle or the preset time in the adjustment instruction; the target tripping current is the tripping current corresponding to the overload type of the tripping type; The trip current growth rate is determined according to the average trip current and the initial protection value, and the initial protection value is increased according to the trip current growth rate to obtain the first target protection value.

3. The method according to claim 2, characterized in that The step of determining the tripping current growth rate according to the average tripping current and the initial protection value includes: The trip current growth rate is obtained by subtracting the initial protection value from the average trip current and dividing the result by the initial protection value.

4. The method according to claim 2, characterized in that: Increasing the initial protection value according to the tripping current growth rate to obtain the first target protection value includes: According to the sum of the tripping current growth rate and the first coefficient, the initial protection value is increased to obtain the first target protection value; wherein the first coefficient is greater than or equal to zero and less than 1.

5. The method according to claim 1, characterized in that The step of reducing the initial protection value of the circuit breaker according to the protection value growth rate to obtain a second target protection value includes: Determine the average working current of the circuit breaker according to a preset time length and a plurality of working currents within the preset time length; wherein the preset time length is the time length of the adjustment cycle or the preset time length in the adjustment instruction; The protection value growth rate is determined according to the average working current and the initial protection value, and the initial protection value is reduced according to the protection value growth rate to obtain the second target protection value.

6. The method according to claim 5, characterized in that The step of determining the protection value growth rate according to the average working current and the initial protection value includes: The protection value growth rate is obtained by subtracting the average working current from the initial protection value and dividing the result by the initial protection value.

7. The method according to claim 5, characterized in that The reducing the initial protection value according to the protection value growth rate to obtain the second target protection value includes: According to the sum of the protection value growth rate and the second coefficient, the initial protection value is reduced to obtain the second target protection value; wherein the second coefficient is greater than or equal to zero and less than the protection value growth rate.

8. The method according to claim 1, characterized in that If the operation information of the circuit breaker includes tripping information, before increasing the initial protection value of the circuit breaker according to the tripping current growth rate to obtain the first target protection value, the method further includes: Acquire historical operating parameters of the circuit breaker from the circuit breaker; wherein the historical operating parameters at least include the operating information, the initial protection value and the electrical parameters of the circuit breaker.

9. A circuit breaker control system, characterized in that: include: Servers and controllers; The controller is used to execute the circuit breaker control method according to any one of claims 1 to 8; The server is connected to the circuit breaker, and the server is used to obtain the operation information of the circuit breaker; The controller is connected to the server, and is used to obtain the operation information from the server.

10. The circuit breaker control system according to claim 9, characterized in that: The circuit breaker includes a control module, and the control module includes a wired communication unit and a wireless communication unit; The wired communication unit and the wireless communication unit are connected to the server respectively.

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