Short network current balance control method and control system

Abstract

The embodiment of the invention provides a short network current balance control method and control system, and relates to the technical field of automatic control. The short network current balance control method comprises the following steps: acquiring current data of each cable in a plurality of cables under a current working condition and a current load; according to the historical current data, determining the adjustment target current of the plurality of cables under the current working condition and the current load; and determining the working state of a short network current balancer arranged on the plurality of cables and used for adjusting the current based on the adjustment target current and the current data in each cable. According to the embodiment of the invention, real-time and effective automatic balance adjustment of all cables is realized.

Description

Technical Field

[0001] This application relates to the field of automatic control technology, and specifically relates to a short network current balance control method and a short network current balance control system. Background Art

[0002] A single wire cannot carry a large current alone. Therefore, multiple cables are required to carry the current together in high-current applications. For example, in a submerged arc furnace, due to the low-voltage and high-current working mode, the electrode current is usually as high as tens of thousands of amperes. To ensure convenient and reliable installation, the current is transmitted by multiple cables mainly composed of copper tubes in parallel, and it is ensured that the current distributed to each copper tube and the connected conductive elements does not exceed their load-carrying capacity.

[0003] During this process, in order to ensure the current load balance on each cable, although various balancing measures have been taken, such as making the cable routing and layout as symmetrical as possible, in actual production, the current distribution of the cables and the connected contact elements is still uneven. The uneven current distribution will cause uneven electrode baking. Moreover, due to the current imbalance, some electrical components will carry too much current, causing the conductive element to be overloaded, while some electrical components will carry too little current. If the above situation persists for a long time, it will greatly increase the probability of electrode accidents and also affect the production efficiency of the entire production system. Most of the existing short network current balance technologies rely on pure manual adjustment and are adjusted according to past manual experience, with a low degree of intelligence. Summary of the Invention

[0004] The purpose of the embodiments of this application is to provide a short network current balance control method and system. By real-time monitoring the current and active power of each cable under different working conditions, and using the method of optimal curve fitting in big data analysis, the curve function relationship between the cable current I and the active power P that is most suitable is found. Thus, the short network current balancer can be used to more accurately adjust the current on each cable in real time, ensuring that the current on all cables is within a suitable and reliable range, thereby solving the problem of uneven cable current distribution and at least solving some of the problems in the background art.

[0005] To achieve the above purpose, a short network current balance control method is provided in this application. The method includes: obtaining the current data of each cable in multiple cables under the current working condition and current load; determining the adjusted target current of the multiple cables under the current working condition and current load according to the historical current data; and determining the working state of the short network current balancer for adjusting the current provided on the multiple cables based on the adjusted target current and the current data of each cable.

[0006] Optionally, the historical current data is obtained through the following steps: under different loads and different working conditions, obtain the current data on each cable transmitted in real time by the current detection device, and statistically classify and organize the current data of each cable to obtain the historical current data.

[0007] Optionally, determining the target adjustment current of multiple cables under the current working condition and the current load according to the historical current data includes: extracting data samples from the historical current data; obtaining the fitting relationship between the load and the average current based on the data samples, where the fitting relationship has the average current corresponding to each load, and the data samples include the load and the average current corresponding to the load; based on the fitting relationship, calculate the average current corresponding to the current load, and use the calculated average current as the target adjustment current.

[0008] Optionally, extracting data samples from the historical current data includes: grouping the historical current data based on the same working condition; determining the maximum current value and the minimum current value within each group; removing the historical current data of the cable corresponding to the maximum current value and the cable corresponding to the minimum current value; calculating the average value of multiple current data with the same load within each group; using the historical current data within the group with the same working condition as the current working condition as the data sample.

[0009] Optionally, before determining the working state of the short-circuit network current balancer for adjusting the current provided on the multiple cables based on the target adjustment current and the current data in each cable, the method further includes: determining the minimum value in the current data from the current data in each cable of the multiple cables under the current working condition and the current load; judging whether the difference between the minimum value in the current data and the average current of the current data under the same working condition and the same load in the historical current data is within a preset range; if not within the preset range, generate a fault message; if within the preset range, perform the subsequent steps.

[0010] Optionally, obtaining the fitting relationship between the load and the average current based on the data samples includes: establishing a coordinate system with the active power in the load and the average current as the coordinate axes; mapping the numerical pairs of the active power and the average current in the data samples to the coordinate points in the coordinate system; fitting a curve according to the coordinate points, and using the function of the fitted curve as the fitting relationship.

[0011] Optionally, the function of the fitted curve is a fifth-order function with the active power as the independent variable and the average current as the dependent variable, and the coefficients of the fifth-order function are determined according to the fitting result.

[0012] Optionally, calculating the average current corresponding to the current load based on the fitting relationship includes: substituting the current load as the independent variable into the curve function, and calculating the value of the curve function as the average current corresponding to the current load.

[0013] Optionally, the short-circuit network current balancer includes a movable semi-circular ring and a fixed semi-circular ring, and the working state of the short-circuit network current balancer includes the cross-sectional area corresponding to the cross-sections of the movable semi-circular ring and the fixed semi-circular ring; determining the working state of the short-circuit network current balancer for adjusting the current provided on the multiple cables based on the regulated target current and the current data in each cable includes: taking the cable where the maximum current value in the current data of the current cable is located as the adjustment object, and adjusting the cross-sectional area corresponding to the cross-section of the short-circuit network current balancer on the adjustment object; during the adjustment process, monitoring whether the ratio of the difference between the maximum current and the minimum current in the current data to the maximum current is within a preset range; when the ratio of the difference to the maximum current is not within the preset range, continuing the adjustment process; when the ratio of the difference to the maximum current is within the preset range, ending the adjustment process for the adjustment object.

[0014] Optionally, adjusting the cross-sectional area corresponding to the cross-section of the short-circuit network current balancer on the adjustment object includes: gradually increasing the cross-sectional area corresponding to the cross-section of a single short-circuit network current balancer; and when there are multiple short-circuit network current balancers on the adjustment object, when the cross-sectional area corresponding to the cross-section of a certain short-circuit network current balancer reaches the maximum value, adjusting the cross-sectional area corresponding to the cross-section of another short-circuit network current balancer.

[0015] Optionally, after the adjustment process for the adjustment object ends, the method further includes: re-acquiring the current data in each of the multiple cables under the current working condition and the current load; based on the re-acquired current data, determining the cable where the maximum current value in the current data of the current cable is located as the new adjustment object, and performing the adjustment process on the new adjustment object.

[0016] In this application, a short-circuit network current balance control system is further provided, and the system includes: a current detection device, arranged on each of the multiple cables, for collecting the current data in each of the multiple cables; a short-circuit network current balancer, arranged on each of the multiple cables, for executing a corresponding working state according to an adjustment instruction; a controller, configured to generate the adjustment instruction based on the current data of the current detection device.

[0017] Optionally, generating the adjustment instruction based on the current data of the current detection device includes: obtaining the current data of each cable among multiple cables under the current working condition and current load; determining the adjustment target current of multiple cables under the current working condition and current load according to the historical current data; determining the working state of the short-circuit network current balancer for adjusting the current and arranged on the multiple cables based on the adjustment target current and the current data of each cable; and generating the adjustment instruction based on the determined working state and the current state of the short-circuit network current balancer.

[0018] Optionally, the short-circuit network current balancer includes: a first semi-circular ring and a second semi-circular ring capable of relative movement, the first semi-circular ring and the second semi-circular ring are made of silicon steel; and a controllable telescopic rod arranged on the first semi-circular ring or the second semi-circular ring; the telescopic state of the controllable telescopic rod is related to the cross-sectional corresponding area of the first semi-circular ring and the second semi-circular ring.

[0019] Optionally, both the first semi-circular ring and the second semi-circular ring are obtained by pressing multiple layers of silicon steel sheets, and the outer walls of the first semi-circular ring and the second semi-circular ring are wrapped with magnetic isolation materials.

[0020] In this application, an electronic device is further provided, including: at least one processor; a memory connected to the at least one processor; wherein, the memory stores instructions executable by the at least one processor, and the at least one processor realizes the steps of the foregoing short-circuit network current balance control method by executing the instructions stored in the memory.

[0021] In this application, a machine-readable storage medium is further provided, and instructions are stored on the machine-readable storage medium, and when the instructions are executed by a processor, the processor is configured to execute and realize the foregoing short-circuit network current balance control method.

[0022] In this application, a computer program product is further provided, including a computer program, and when the computer program is executed by a processor, the foregoing short-circuit network current balance control method is realized.

[0023] The above technical solutions have the following beneficial effects: (1) By introducing the short-circuit network current balance control method, real-time monitoring and dynamic adjustment are realized, completely changing the traditional adjustment mode. At the same time, the short-circuit network current balance control system based on the dynamic adjustment short-circuit network current balance method can automatically analyze the current state of each cable according to real-time data, ensuring the uniformity and stability of the current distribution. Due to the adoption of an advanced adaptive control algorithm, the system can automatically adjust the current distribution according to the requirements under different working conditions, realizing intelligent management.

[0024] (2) It has important technological innovations and application values in the field of current balance regulation. In the past, current balance regulation mainly relied on manual experience, with the problem of poor adaptability. Manual adjustment is not only inefficient but also often requires power-off when readjustment is needed after the adjustment is completed, resulting in production stagnation and seriously affecting production efficiency and safety. The implementation mode of this application not only improves the accuracy and stability of current regulation but also greatly reduces the need for manual intervention, thereby reducing the occurrence of human errors. At the same time, the characteristic of real-time automatic regulation makes the production process more efficient, without the need for frequent power-off for adjustment, ensuring the continuity and safety of production.

[0025] (3) The implementation mode of this application provides convenience for the maintenance of equipment, reduces the failure rate, and extends the service life of the equipment. It not only solves many problems in traditional regulation methods but also provides strong technical support for industrial production, promoting the improvement of production efficiency and the modernization of equipment management.

[0026] Other features and advantages of the embodiments of this application will be described in detail in the subsequent specific implementation part. Brief Description of the Drawings

[0027] The drawings are used to provide a further understanding of the embodiments of this application, and constitute a part of the specification. Together with the following specific implementation, they are used to explain the embodiments of this application, but do not constitute a limitation to the embodiments of this application. In the drawings: Figure 1 Schematically shows the step schematic diagram of the short-circuit network current balance control method according to the implementation mode of this application; Figure 2 Schematically shows the curve fitting relationship diagram according to the implementation mode of this application; Figure 3 Schematically shows the structural schematic diagram of the automatic adjustment short-circuit network current balancer according to the implementation mode of this application; Figure 4 Schematically shows the working principle schematic diagram of the automatic adjustment short-circuit network current balancer according to the implementation mode of this application; Figure 5 Schematically shows the first part of the actual installation effect diagram of the automatic adjustment short-circuit network current balancer according to the implementation mode of this application; Figure 6 Schematically shows the second part of the actual installation effect diagram of the automatic adjustment short-circuit network current balancer according to the implementation mode of this application; Figure 7 Schematically shows the process schematic diagram of the active power and optimal current calculation principle according to the implementation mode of this application; Figure 8Schematically shows a schematic diagram of the working principle of an automatic adjustment short-network current balancer according to an embodiment of the present application; Figure 9 Schematically shows a schematic diagram of the structure of a short-network current balance control device according to an embodiment of the present application; Figure 10 Schematically shows an internal structure diagram of an electronic device according to an embodiment of the present application. Specific embodiments

[0028] The following details the specific embodiments of the embodiments of the present application in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the embodiments of the present application, and are not used to limit the embodiments of the present application.

[0029] Figure 1 Schematically shows a schematic diagram of the steps of a short-network current balance control method according to an embodiment of the present application. As Figure 1 shown, a short-network current balance control method includes: S01. Obtain the current data in each of multiple cables under the current working condition and current load; S02. Determine the adjusted target current of the multiple cables under the current working condition and current load according to the historical current data; S03. Determine the working state of the short-network current balancer for adjusting the current provided on the multiple cables based on the adjusted target current and the current data in each cable.

[0030] Through the above embodiments, the problem of poor adaptability in the existing adjustment method is overcome. It not only improves the accuracy and stability of current adjustment, but also greatly reduces the need for manual intervention, thereby reducing the occurrence of human errors. At the same time, the characteristic of real-time automatic adjustment makes the production process more efficient, without the need to frequently power off for adjustment, ensuring the continuity and safety of production.

[0031] In some embodiments of the present application, the historical current data is obtained through the following steps: Under different loads and different working conditions, obtain the current data on each cable transmitted in real time by the current detection device, and statistically classify and organize the current data of each cable to obtain the historical current data. This step can be implemented in a test scenario to obtain historical data based on test data. This step can also be implemented in an application scenario to obtain this historical data based on the collection and organization of on-site data. Under different loads and different working conditions, the current detection device transmits the current on each cable to the short-network current balancer control system in real time. In the short-network current balancer control system, the current of each cable is statistically classified and organized to obtain the historical database of current data.

[0032] In some embodiments of the present application, determining the regulated target current of multiple cables under the current working condition and current load according to historical current data includes: extracting data samples from the historical current data; obtaining a fitting relationship between the load and the average current based on the data samples, where the fitting relationship has the average current corresponding to each load, and the data samples include the load and the average current corresponding to the load; calculating the average current corresponding to the current load based on the fitting relationship, and using the calculated average current as the regulated target current. This embodiment introduces big data technology and can determine the most suitable curve function relationship between the current I and the active power P in the load by using the method of optimal curve fitting based on historical data. This process enables the short-circuit current balancer to more accurately adjust the current of each cable, ensuring that the current of all cables is within a suitable and reliable range, thereby effectively solving the problem of uneven current distribution in the cables.

[0033] In some embodiments of the present application, extracting data samples from the historical current data includes: grouping the historical current data based on the same working condition; determining the maximum current value and the minimum current value within each group; removing the historical current data of the cable corresponding to the maximum current value and the cable corresponding to the minimum current value; calculating the average value of multiple current data with the same load within each group; using the historical current data within the group having the same working condition as the current working condition as the data samples. Find the cable Lmax where the maximum current is located and the cable Lmin where the minimum current is located in the historical current data under the same load and the same working condition; after removing the current data corresponding to the cable Lmax with the maximum current and the cable Lmin with the minimum current in the statistical data, take the average value of the current on the remaining cables to obtain the average current on each cable under different load working conditions, that is: I avg1 ,I avg2 ,I avg3 ,I avg4 ,I avg5 ,I avg6 ,I avg7 ,…,I avgi 。The average current here is distinguished based on the grouping, and the I avgi within the same group is related to the load.

[0034] In some embodiments of the present application, before determining the operating state of the short-circuit current balancer for current regulation provided on the multiple cables based on the regulated target current and the current data in each cable, the method further includes: determining the minimum value among the current data in each of the multiple cables under the current working condition and current load; determining whether the difference between the minimum value in the current data and the current average value of the current data under the same working condition and the same load in the historical current data is within a preset range; generating a fault message if it is not within the preset range; and performing subsequent steps if it is within the preset range. The subsequent steps herein include the aforementioned step of determining the operating state of the short-circuit current balancer for current regulation provided on the multiple cables based on the regulated target current and the current data in each cable, that is, the step of regulating the current. Specifically, then, compare L min The minimum current I on the cable min , if it is much smaller than its corresponding I avg under the same working condition and load, generally by experience I min <I avg by about 3%, it indicates that there is a break point on this cable or the connection at the cable joint is not good. At this time, the short-circuit current balance system will give an alarm prompt, and technical personnel need to be arranged to check the line. If it is not much smaller than I avg under the same working condition and load, then perform subsequent steps and use the short-circuit current balancer for balance adjustment. This embodiment is beneficial for detecting cable faults and improving the robustness of the short-circuit current balance control method during execution. In some embodiments of the present application, obtaining the fitting relationship between the load and the current average value based on the data samples includes: establishing a coordinate system with the active power in the load and the current average value as the coordinate axes; mapping the numerical pairs of the active power and the current average value in the data samples to the coordinate points in the coordinate system; and fitting a curve according to the coordinate points, and using the function of the fitted curve as the fitting relationship. Figure 2 Schematically shows a curve fitting relationship diagram according to an embodiment of the present application. As Figure 2 shown, taking the active power loads P1, P2, P3,..., Pi under different working conditions as the vertical coordinates, and taking the average currents I avg1 , I avg2 , I avg3 , I avg4 , I avg5 , I avg6 , I avg7 , …, I avgi as the horizontal coordinates to obtain a set of data, that is, the numerical pairs (I avg1 , P1) (I avg2 , P2) (I avg3 , P3), …, (I avgi, Pi), and fit the curve function relationship of P-I based on this set of data. According to the fitted curve function relationship, the optimal average current I of the active load under different working conditions can be obtained avg , that is, the optimal average current I avg formula.

[0035] Further, the function of the fitted curve is a fifth-order function with the active power as the independent variable and the average current as the dependent variable, and the coefficients of the fifth-order function are determined according to the fitting result. That is: I avg = a0 + a1P + a2P 2 + a3P 3 + a4P 4 + a5P 5 , where a0, a1, a2, a3, a4, a5 are coefficients, which are determined according to the curve function relationship.

[0036] In some embodiments of the present application, the short-circuit network current balancer includes a movable semi-circular ring and a fixed semi-circular ring, and the working state of the short-circuit network current balancer includes the corresponding cross-sectional area of the movable semi-circular ring and the fixed semi-circular ring. Figure 3 Schematically shows a schematic structural diagram of an automatically adjustable short-circuit network current balancer according to an embodiment of the present application. As Figure 3 shown, the short-circuit network current balancer is composed of silicon steel sheets of two semi-circular rings; each semi-circular ring is pressed by silicon steel sheets with a thickness of about 0.3 mm; the two semi-circular rings are divided into: a fixed semi-circular ring and a movable semi-circular ring; wherein the movable semi-circular ring can adjust the moving distance of the movable semi-circular ring through a controllable pneumatic telescopic rod, and by adjusting the moving distance of the movable semi-circular ring, the corresponding cross-sectional area of the movable semi-circular ring and the fixed semi-circular ring is adjusted, so as to achieve the adjustment effect of the short-circuit network current balancer. Figure 4 Schematically shows a schematic working principle diagram of an automatically adjustable short-circuit network current balancer according to an embodiment of the present application. As Figure 4 shown, when the corresponding cross-sectional area of the movable semi-circular ring and the fixed semi-circular ring = 0%, the short-circuit network current balancer is invalid; when the corresponding cross-sectional area of the movable semi-circular ring and the fixed semi-circular ring = 100%, the adjustment effect of the short-circuit network current balancer is the largest; in order to prevent the electromagnetic induction effect of the two semi-circular rings from interfering with the surrounding large-current cables, the outer walls of the two semi-circular rings are wrapped with a stainless steel shell with very good magnetic isolation materials, and stainless steel installation bolts are also used for installation.

[0037] Based on the above short network current balancer, determining the working state of the short network current balancer for adjusting current provided on the multiple cables based on the regulated target current and the current data in each cable, including: taking the cable where the maximum current in the current data of the current cable is located as the adjustment object, and adjusting the cross-sectional area corresponding to the short network current balancer on the adjustment object; during the adjustment process, monitoring whether the ratio of the difference between the maximum current and the minimum current in the current data to the maximum current is within a preset range; when the ratio of the difference to the maximum current is not within the preset range, continuing the adjustment process; when the ratio of the difference to the maximum current is within the preset range, ending the adjustment process for the adjustment object. Exemplarily, using the short network current balancer to adjust the maximum current I max on L max , and gradually adjusting I max to be near I avg . The specific method is as follows: According to the current actual working condition active power load P, using the optimal average current I avg formula: I avg =a0 + a1P + a2P 2 + a3P 3 + a4P 4 + a5P 5 calculate the current corresponding optimal average current I avg ; use the current detection device to monitor the numerical change of the maximum current I max in real time, taking the current corresponding optimal average current I avg as the adjustment standard, when there are multiple short network current balancers, start to automatically adjust the multiple short network current balancers on the L max cable; first adjust the first short network current balancer, gradually adjust it from the zero position to the maximum, and observe the numerical change of the maximum current I max during the adjustment process. It will be found that the numerical value of the maximum current I max is gradually decreasing, and at the same time the minimum current I min will gradually increase; if the real-time detected (I max -I min )÷I max > 3%, it means that the balance has not been achieved yet, then continue to adjust the next short network current balancer in the same way, and the adjustment method is as described above; if the real-time detected (I max -I min )÷I max ≤ 3%, it means that at this time the maximum current I max and the minimum current I min have basically reached balance, and the current adjustment of this maximum cable is completed.

[0038] Figure 5 Schematically shows the first part of the actual installation effect diagram of the automatic short-network current balancer according to an embodiment of the present application. Figure 6 Schematically shows the second part of the actual installation effect diagram of the automatic short-network current balancer according to an embodiment of the present application. As Figure 5 and Figure 6 shown, the installation effect of the automatic short-network current balancer installed on the cable. The number of automatic short-network current balancers in the figure is only for illustration and does not constitute a quantitative or qualitative limitation.

[0039] In some embodiments of the present application, the method further includes: re-obtaining the current data in each cable among multiple cables under the current working condition and current load; based on the re-obtained current data, determining the cable where the maximum current value in the current data of the current cable is located as the new adjustment object, and performing an adjustment process on the new adjustment object. According to the cable current I max detected by the current detection device at this time, find the cable L max where the cable current is the largest at this time, and repeat the operation steps in the previous embodiment for adjustment until the difference between the maximum cable current I max and the minimum cable current I min in each detection period is within a preset range, for example, 3% of I max . This step can be continuously executed in a loop to ensure the current balance on multiple cables during the entire production process.

[0040] Figure 7 Schematically shows the process schematic diagram of the active power and optimal current calculation principle according to an embodiment of the present application. As Figure 7 shown, it schematically shows the current data monitored by the cable current real-time detection device, and finally obtains the calculation process of the optimal cable current.

[0041] Figure 8 Schematically shows the schematic diagram of the working principle of the automatic short-network current balancer according to an embodiment of the present application. As Figure 8 shown, it schematically shows the working principle under the implementation scenario of the submerged arc furnace. It obtains the optimal average current through the short-network current balancer control system that can execute the aforementioned short-network current balance control method, and controls the telescopic rod regulator to adjust the short-network current balancer respectively based on this.

[0042] Through the above embodiments, the short-network current balance control is realized. The short-network current balance control system not only solves many problems in the traditional adjustment method, but also provides strong technical support for industrial production, promoting the improvement of production efficiency and the modernization of equipment management.

[0043] Based on the same inventive concept, this application also provides a short network current balance control device. Figure 9 Schematically shows a structural diagram of the short network current balance control device according to an embodiment of the present application. As Figure 9 shown, the device includes: a current acquisition module that acquires current data in each of multiple cables under the current working condition and current load; a current determination module that is used to determine the adjustment target current of the multiple cables under the current working condition and current load according to historical current data; and a state determination module that determines the working state of the short network current balancer for adjusting current provided on the multiple cables based on the adjustment target current and the current data in each cable.

[0044] For the specific limitations of each functional module in the above short network current balance control device, reference can be made to the limitations on the short network current balance control method in the foregoing text, which will not be elaborated here. Each module in the above system can be implemented in whole or in part by software, hardware, and their combination. Each of the above modules can be embedded in or independent of the processor in the electronic device in the form of hardware, or stored in the memory in the electronic device in the form of software, so as to facilitate the processor to call and execute the operations corresponding to each of the above modules. It also solves many problems in the traditional adjustment method, and also has the advantages of providing strong technical support for industrial production, promoting the improvement of production efficiency and the modernization of equipment management.

[0045] In some embodiments of the present application, an electronic device is also provided, including: at least one processor; a memory connected to the at least one processor; wherein, the memory stores instructions executable by the at least one processor, and the at least one processor executes the foregoing short network current balance control method. Its internal structure diagram can be as Figure 10 shown. Figure 10 Schematically shows the internal structure diagram of the electronic device according to an embodiment of the present application. The electronic device includes a processor A01, a network interface A02, a memory (not shown in the figure), and a database (not shown in the figure) connected through a system bus. Among them, the processor A01 of the electronic device is used to provide computing and control capabilities. The memory of the electronic device includes an internal memory A03 and a non-volatile storage medium A04. The non-volatile storage medium A04 stores an operating system B01, a computer program B02, and a database (not shown in the figure). The internal memory A03 provides an environment for the operation of the operating system B01 and the computer program B02 in the non-volatile storage medium A04. The network interface A02 of the electronic device is used to communicate with an external terminal through a network connection. The computer program B02, when executed by the processor A01, implements a short network current balance control method.

[0046] Those skilled in the art can understand, Figure 10The structure shown is only a block diagram of some parts of the structure related to the solution of this application, and does not constitute a limitation on the electronic device to which the solution of this application is applied. The specific electronic device may include more or fewer components than those shown in the figure, or combine some components, or have different component arrangements.

[0047] In some embodiments of the present application, a short-circuit network current balance control system is further provided. The system includes: a current detection device disposed on each of multiple cables for collecting current data in each of the multiple cables; a short-circuit network current balancer disposed on each of the multiple cables for performing corresponding working states according to adjustment instructions; a controller configured to generate the adjustment instructions based on the current data of the current detection device. One implementation of this system can be referred to Figure 8 as shown, which shows the logical control loop of the short-circuit network current balancer control system and the short-circuit network current balancer.

[0048] In some alternative embodiments, generating the adjustment instructions based on the current data of the current detection device includes: obtaining the current data in each of the multiple cables under the current working condition and current load; determining the adjustment target current of each of the multiple cables under the current working condition and current load according to historical current data; determining the working state of the short-circuit network current balancer disposed on the multiple cables for adjusting the current based on the adjustment target current and the current data in each cable; generating the adjustment instructions based on the determined working state and the current state of the short-circuit network current balancer. In this embodiment, the controller is configured to execute the foregoing short-circuit network current balance control method.

[0049] In some alternative embodiments of the present application, the short-circuit network current balancer includes: a first semi-circular ring and a second semi-circular ring that can move relative to each other, and the first semi-circular ring and the second semi-circular ring are made of silicon steel; and a controllable telescopic rod disposed on the first semi-circular ring or the second semi-circular ring; the telescopic state of the controllable telescopic rod is related to the corresponding cross-sectional area of the first semi-circular ring and the second semi-circular ring. The first semi-circular ring and the second semi-circular ring are both pressed from multiple layers of silicon steel sheets, and the outer walls of the first semi-circular ring and the second semi-circular ring are wrapped with magnetic isolation materials. As Figure 3 shown, the movable semi-circular ring and the fixed semi-circular ring in the figure are the first semi-circular ring and the second semi-circular ring; both the movable ring and the fixed semi-circular ring are wrapped with stainless steel. The controllable telescopic rod disposed on the movable semi-circular ring can adjust the moving distance of the movable semi-circular ring. By adjusting the moving distance of the movable semi-circular ring, the corresponding cross-sectional area of the movable semi-circular ring and the fixed semi-circular ring is adjusted, so as to achieve the adjustment effect of the short-circuit network current balancer.

[0050] In an implementation provided by the present application, a machine-readable storage medium is provided. Instructions are stored on the machine-readable storage medium, and when the instructions are executed by a processor, the processor is configured to execute the aforementioned short-circuit network current balance control method.

[0051] In an implementation provided by the present application, a computer program product is provided, including a computer program that implements the aforementioned short-circuit network current balance control method when executed by a processor.

[0052] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0053] The present application is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the specified functions in one Figure 1 flow or multiple flows and / or Figure 1 blocks or multiple blocks.

[0054] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device that implements the specified functions in one Figure 1 flow or multiple flows and / or Figure 1 blocks or multiple blocks.

[0055] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the specified functions in one Figure 1 flow or multiple flows and / or Figure 1 blocks or multiple blocks.

[0056] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0057] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0058] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0059] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0060] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A short-circuit current balance control method, characterized in that: The method includes: Obtaining current data in each of the plurality of cables under current working conditions and current loads; Determine the regulation target current of multiple cables under the current working condition and the current load according to the historical current data; The working state of a short-circuit current balancer for regulating current disposed on the plurality of cables is determined based on the regulation target current and current data in each cable.

2. The method according to claim 1, characterized in that: The historical current data is obtained by the following steps: Under different loads and different working conditions, the current data on each cable transmitted by the current detection device in real time is obtained, and the current data of each cable is statistically classified and sorted to obtain historical current data.

3. The method according to claim 1, characterized in that Determine the target current of multiple cables under current working conditions and current loads based on historical current data, including: extracting data samples from the historical current data; Obtaining a fitting relationship between a load and a current mean based on the data sample, wherein the fitting relationship has a current mean corresponding to each load, and the data sample includes a load and a current mean corresponding to the load; Based on the fitting relationship, the current average corresponding to the current load is calculated to obtain the current average as the adjustment target current.

4. The method according to claim 3, characterized in that Extracting data samples from the historical current data includes: Grouping the historical current data based on the same operating conditions; Determine the maximum current value and the minimum current value in each group; Removing historical current data of the cable corresponding to the maximum current value and the cable corresponding to the minimum current value; Calculate the average of multiple current data of the same load in each group; The historical current data in the group having the same operating condition as the current operating condition is used as the data sample.

5. The method according to claim 4, characterized in that Before determining the working state of the short network current balancer for regulating current disposed on the plurality of cables based on the regulated target current and the current data in each cable, the method further includes: Determine a minimum value in the current data from the current data in each of the plurality of cables under the current working condition and the current load; Determine whether a difference between a minimum value in the current data and a current mean value of current data under the same working condition and the same load in the historical current data is within a preset range; If it is not within the preset range, a fault message is generated.

6. The method according to claim 3, characterized in that Obtaining a fitting relationship between the load and the current mean based on the data sample includes: Establish a coordinate system with the active power and current mean value in the load as the coordinate axis; Mapping the value pairs of active power and current mean in the data sample to coordinate points in the coordinate system; A curve is fitted according to the coordinate points, and a function of the fitted curve is used as the fitting relationship.

7. The method according to claim 6, characterized in that The function of the curve obtained by fitting is a quintic function with active power as the independent variable and current mean as the dependent variable, and the coefficient of the quintic function is determined according to the fitting result.

8. The method according to claim 6, characterized in that Calculating the current mean value corresponding to the current load based on the fitting relationship includes: Substitute the current load as an independent variable into the curve function, and calculate the value of the curve function as the current mean value corresponding to the current load.

9. The method according to claim 1, characterized in that: The short network current balancer comprises a movable semicircular ring and a fixed semicircular ring, and the working state of the short network current balancer comprises the cross-sectional corresponding areas of the movable semicircular ring and the fixed semicircular ring; Determining the working state of a short-circuit current balancer for adjusting current disposed on the plurality of cables based on the adjustment target current and the current data in each cable includes: Taking the cable where the maximum current value in the current data of the current cable is located as the adjustment object, adjusting the corresponding area of ​​the cross section of the short network current balancer on the adjustment object; During the adjustment process, monitoring whether the ratio of the difference between the maximum current value and the minimum current value in the current data to the maximum current value is within a preset range; When the ratio of the difference to the maximum current value is not within a preset range, continuing the adjustment process; When the ratio of the difference to the maximum current value is within a preset range, the adjustment process of the adjustment object is completed.

10. The method according to claim 9, characterized in that Adjusting the cross-sectional corresponding area of ​​the short-circuit current balancer on the adjustment object comprises: Gradually increase the cross-sectional area corresponding to a single short-circuit current balancer; And when there are multiple short-circuit current balancers on the adjustment object, when the corresponding area of ​​the cross section of a short-circuit current balancer reaches a maximum value, the corresponding area of ​​the cross section of another short-circuit current balancer is adjusted.

11. The method according to claim 9, characterized in that After the adjustment process of the adjustment object is completed, the method further includes: Re-obtaining current data in each of the plurality of cables under current working conditions and current loads; Based on the newly acquired current data, a cable with a maximum current value in the current data of the current cable is determined as a new adjustment object, and an adjustment process is performed on the new adjustment object.

12. A short-circuit current balance control system, characterized in that: The system includes: A current detection device is provided on each of the plurality of cables and is used to collect current data in each of the plurality of cables; A short-circuit current balancer is provided on each of the plurality of cables and is used to execute a corresponding working state according to an adjustment instruction; A controller is configured to generate the adjustment instruction based on the current data of the current detection device.

13. The system according to claim 12, characterized in that The step of generating the adjustment instruction based on the current data of the current detection device comprises: Obtaining current data in each of the plurality of cables under current working conditions and current loads; Determine the regulation target current of multiple cables under the current working condition and the current load according to the historical current data; Determining a working state of a short-circuit current balancer for regulating current disposed on the plurality of cables based on the regulated target current and current data in each cable; The adjustment instruction is generated based on the determined working state and the current state of the short network current balancer.

14. The system according to claim 12, characterized in that The short network current balancer comprises: A first semicircular ring and a second semicircular ring capable of relative movement, wherein the first semicircular ring and the second semicircular ring are made of silicon steel; and A controllable telescopic rod is arranged on the first semicircular ring or the second semicircular ring; the telescopic state of the controllable telescopic rod is correlated with the corresponding area of ​​the cross section of the first semicircular ring and the second semicircular ring.

15. The system according to claim 14, characterized in that The first semicircular ring and the second semicircular ring are both obtained by pressing multiple layers of silicon steel sheets, and the outer walls of the first semicircular ring and the second semicircular ring are wrapped with magnetic isolation material.

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