Double-split parallel cable current imbalance adjustment system and method based on magnetic balance

Abstract

The present application relates to a current imbalance regulation system and method for double-split parallel cables based on magnetic balance. The information acquisition device of the system is used to collect the current data and magnetic field data of each cable in the parallel cable; the excitation device is used to construct an auxiliary magnetic field for the parallel cable to eliminate the magnetic field effect caused by the current imbalance of the parallel cable; the control device is used to obtain each current data and each magnetic field data, and determine the current imbalance and magnetic field imbalance of the parallel cable based on each current data and each magnetic field data; when it is determined that the parallel cable meets the regulation conditions according to the current imbalance and magnetic field imbalance, the excitation device is controlled to operate until the parallel cable meets the current balance condition. The use of this system can quickly adapt to the load changes and environmental conditions of the double-split parallel cable, and improve the accuracy and efficiency of current imbalance regulation.

Description

Technical Field

[0001] The present application relates to the field of electrical engineering technology, and in particular to a system and method for regulating current imbalance of double-split parallel cables based on magnetic balance. Background Art

[0002] In modern power systems, parallel cable technology is widely used in large-scale power transmission and distribution networks because it can increase transmission capacity, enhance system reliability and reduce the risk of single line failure. However, despite the many advantages of parallel cable technology, in actual operation, the current distribution between parallel cables is often uneven due to various factors, such as manufacturing differences, different cable laying environments, and uneven load distribution. The consequence of current imbalance will have a significant impact on the safety, reliability and economy of the power system. Therefore, how to effectively solve the current imbalance problem in parallel cables has become an important issue that needs to be urgently solved in the operation of power systems.

[0003] Existing technical solutions commonly used to solve the current imbalance problem in parallel cables usually rely on static design, such as minimizing parameter differences during the design and laying stages of the cables, or regularly monitoring and maintaining the cables during operation. This technical solution based on static design has limited effect in solving the current imbalance problem and cannot cope with dynamic load changes and environmental conditions. Summary of the invention

[0004] Based on this, it is necessary to provide a double-split parallel cable current imbalance regulation system based on magnetic balance and a double-split parallel cable current imbalance regulation method based on magnetic balance, which can quickly adapt to parallel cable load changes and environmental conditions and improve the accuracy and efficiency of current imbalance regulation.

[0005] In a first aspect, the present application provides a current imbalance adjustment system for a double-split parallel cable based on magnetic balance, the system comprising an information acquisition device, an excitation device, and a control device respectively connected to the information acquisition device and the excitation device for communication;

[0006] The information acquisition device is used to collect current data and magnetic field data of each cable in the parallel cables;

[0007] The excitation device is used to construct an auxiliary magnetic field for the parallel cables to eliminate the magnetic field effect caused by the unbalanced current of the parallel cables;

[0008] The control device is used to obtain each of the current data and each of the magnetic field data, and determine the current imbalance and the magnetic field imbalance of the parallel cables based on each of the current data and each of the magnetic field data; when it is determined that the parallel cables meet the adjustment conditions based on the current imbalance and the magnetic field imbalance, the excitation device is controlled to operate until the parallel cables meet the current balance conditions.

[0009] In some embodiments, the information acquisition device includes a current information acquisition component, a magnetic field information acquisition component, and a signal conversion circuit that is communicatively connected to the current information acquisition component and the magnetic field information acquisition component respectively;

[0010] The current information acquisition component is used to collect the current signal of each cable in the parallel cables;

[0011] The magnetic field information acquisition component is used to collect the magnetic field signal of each cable in the parallel cables;

[0012] The signal conversion circuit is connected to the control device, and is used to perform signal conversion on each of the current signals and each of the magnetic field signals to obtain current data and magnetic field data of each of the cables.

[0013] In some of the embodiments, the control device includes a current inner loop control component and a magnetic field outer loop control component;

[0014] The current inner loop control component is used to determine the current imbalance of the parallel cables based on each of the current data, and when it is determined according to the current imbalance that the parallel cables meet the current regulation conditions, control the operation of the excitation device according to the current imbalance to adjust the output current of the excitation device;

[0015] The magnetic field outer loop control component is used to determine the magnetic field imbalance of the parallel cable based on each of the magnetic field data. When it is determined that the parallel cable meets the magnetic field adjustment conditions according to the magnetic field imbalance, the operation of the excitation device is controlled according to the magnetic field imbalance to adjust the magnetic field strength of the excitation device.

[0016] In some embodiments, the current inner loop control component includes a current data processing unit and a current inner loop regulator; the magnetic field outer loop control component includes a magnetic field data processing unit and a magnetic field outer loop regulator; the current data processing unit and the magnetic field data processing unit are respectively connected to the information acquisition device for communication; the current inner loop regulator and the magnetic field outer loop regulator are respectively electrically connected to the excitation device;

[0017] The current data processing unit is used to determine the current imbalance of the parallel cables based on each of the current data, and when the current imbalance is greater than the current imbalance threshold, determine the current difference according to the current imbalance and the current imbalance threshold, and input the current difference to the current inner loop regulator;

[0018] The current inner loop regulator is used to call a proportional-integral control strategy to control the operation of the excitation device according to the current difference;

[0019] The magnetic field data processing unit is used to determine the magnetic field imbalance of the parallel cables based on each of the magnetic field data, and when the magnetic field imbalance is greater than the magnetic field imbalance threshold, determine the magnetic field difference according to the magnetic field imbalance and the magnetic field imbalance threshold, and input the magnetic field difference to the magnetic field outer loop regulator;

[0020] The magnetic field outer loop regulator is used to call a proportional-integral control strategy to control the operation of the excitation device according to the magnetic field imbalance.

[0021] In some of the embodiments, the excitation device includes at least one auxiliary magnetic coil arranged on the parallel cable; the auxiliary magnetic coil is connected to the control device, and is used to accept the control operation of the control device to construct an auxiliary magnetic field for the parallel cable, and the magnetic flux of the auxiliary magnetic field is opposite to the cable magnetic field of the parallel cable.

[0022] In some of these embodiments, the control device further includes a fault detection component;

[0023] The fault detection component is used to perform abnormality detection on the parallel cables according to the current data and magnetic field data of each of the cables to obtain abnormality detection results; when the abnormality detection results indicate that the parallel cables are abnormal, an operation protection mechanism matching the abnormal situation of the parallel cables is started according to the abnormality detection results.

[0024] In some of these embodiments, the control device further includes a model building component;

[0025] The model building component is used to obtain multi-point magnetic field data of the parallel cables and generate a magnetic field distribution model of the parallel cables based on the multi-point magnetic field data; the magnetic field distribution model is used to characterize the interaction information of the cable magnetic fields of the parallel cables and the strength distribution information of the local magnetic fields of the parallel cables.

[0026] In some of these embodiments, the control device further includes a trend prediction component;

[0027] The trend prediction component is used to predict the magnetic field distribution information of the parallel cables under different working conditions according to the magnetic field distribution model, and to perform unbalance trend prediction on the parallel cables based on the magnetic field distribution information to obtain the current unbalance trend prediction results of the parallel cables under corresponding working conditions.

[0028] In some of these embodiments, the control device further includes a remote control component;

[0029] The remote control component is used to generate a monitoring page of the parallel cable and send the monitoring page to a remote terminal for display, wherein the monitoring page is used to display the operating status information of the parallel cable and the operating information of the excitation device; in response to an excitation device adjustment instruction triggered by the monitoring page, an adjustment operation control parameter is obtained, and the operation of the excitation device is controlled according to the adjustment operation control parameter.

[0030] In a second aspect, the present application also provides a method for adjusting current imbalance of a double-split parallel cable based on magnetic balance, the method comprising:

[0031] Obtaining current data and magnetic field data of each cable in the parallel cables;

[0032] Determine the current imbalance and magnetic field imbalance of the parallel cables based on the current data and the magnetic field data;

[0033] When it is determined that the parallel cables meet the adjustment conditions based on the current imbalance and the magnetic field imbalance, an auxiliary magnetic field is constructed for the parallel cables until the parallel cables meet the current balance conditions; the auxiliary magnetic field is used to eliminate the magnetic field effect generated by the current imbalance of the parallel cables.

[0034] The above-mentioned double-split parallel cable current imbalance adjustment system based on magnetic balance and the double-split parallel cable current imbalance adjustment method based on magnetic balance can collect the current data and magnetic field data of each cable in the parallel cable in real time through the information acquisition equipment in the system, so as to monitor the current distribution and magnetic field distribution of the parallel cables, and determine the current imbalance and magnetic field imbalance of the parallel cables based on each current data and each magnetic field data. When it is determined that the parallel cables meet the adjustment conditions based on the current imbalance and the magnetic field imbalance, the control device in the system can control the operation of the excitation device configured in the system until the parallel cables meet the current balance conditions. By setting up information acquisition equipment in the system, no matter what environment the parallel cables are in or what dynamic changes occur in their loads, the control equipment can collect the current data and magnetic field data of each cable in real time through the information acquisition equipment, accurately understand the current distribution and magnetic field distribution of the parallel cables, and achieve rapid response to changes in cable current distribution. During the adjustment process, the control equipment can determine the current imbalance and magnetic field imbalance through the current data and magnetic field data, and accurately control the excitation equipment from the two dimensions of current and magnetic field to achieve dynamic current equalization of the cable current, effectively improving the accuracy and efficiency of the current imbalance adjustment of the double-split parallel cables. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural block diagram of a current imbalance adjustment system of a double-split parallel cable based on magnetic balance in some embodiments;

[0036] Figure 2 A schematic diagram of the arrangement of an excitation device in some embodiments;

[0037] Figure 3 It is a structural block diagram of an information collection device in some embodiments;

[0038] Figure 4 is a structural block diagram of a control device in some embodiments;

[0039] Figure 5 A structural block diagram of a current inner loop control component and a magnetic field outer loop control component in some embodiments;

[0040] Figure 6 It is a structural block diagram of a current imbalance adjustment system of a double-split parallel cable based on magnetic balance in some other embodiments;

[0041] Figure 7 A schematic diagram of a flow chart of a method for adjusting current imbalance of a double-split parallel cable based on magnetic balance in some embodiments;

[0042] Figure 8It is a structural block diagram of a current imbalance adjustment device for double-split parallel cables based on magnetic balance in some embodiments;

[0043] Fig. 9 1 is a diagram of the internal structure of a computer device in some embodiments. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0045] When multiple cables are working in parallel, the current often cannot be evenly distributed among the cables, which may cause some cables to carry excessive current, leading to overheating and energy loss, affecting the safety and life of the cable system.

[0046] In order to improve the safety and operating life of the cable system, in some embodiments, Figure 1 As shown, a double-split parallel cable current imbalance regulation system 100 based on magnetic balance is provided. The double-split parallel cable current imbalance regulation system 100 based on magnetic balance includes an information acquisition device 101, an excitation device 102, and a control device 103 which is respectively communicatively connected to the information acquisition device 101 and the excitation device 102.

[0047] The information collection device 101 is a hardware device for collecting current data and magnetic field data of each cable in the parallel cable. By setting the information collection device 101 on the parallel cable, the current data of each phase of the parallel cable and the magnetic field data between the parallel cables can be accurately collected. The parallel cable is a double-split parallel cable.

[0048] The excitation device 102 is a hardware device used to construct an auxiliary magnetic field for parallel cables to eliminate the magnetic field effect caused by current imbalance in the parallel cables. The auxiliary magnetic field refers to a magnetic field whose magnetic flux direction is opposite to the cable magnetic field of the parallel cables, that is, an AC magnetic field opposite to the direction of the current inside the parallel cables. By constructing an auxiliary magnetic field for the parallel cables, the purpose of adjusting the cable reactance can be achieved. It can be understood that in parallel cables, the cables that are gathered into a parallel unit share an excitation device 102. For example, there are 6 cables in the parallel cable, of which cables 1, 2, and 3 are the first parallel unit, and cables 4, 5, and 6 are the second parallel unit. The parallel cable is composed of the first parallel unit and the second parallel unit in parallel. Then, if Figure 2As shown, the first parallel unit 201 is correspondingly provided with an excitation device 102, and the second parallel unit 202 is correspondingly provided with an excitation device 102, that is, the number of excitation devices 102 arranged in the cable system is related to the number of parallel units constituting the parallel cable, and the excitation device 102 includes a power supply 203.

[0049] Among them, the control device 103 is a device component with logic processing capabilities, which controls the operation of various devices in the system, such as the excitation device 102 and the information acquisition device 101. The control device 103 can be any device component with logic processing capabilities, such as a microcontroller, a control chip, etc.

[0050] Among them, the current data is information data used to characterize the current flow in the cable, such as the magnitude of the current. The magnetic field data is information data used to characterize the magnetic field distribution around the cable, such as the magnetic field strength, magnetic field direction, etc.

[0051] Current imbalance refers to the difference in current carried by each cable in a parallel cable. It is a technical indicator that measures whether the current distribution of each cable in a parallel cable is uniform from the current dimension. In parallel cables, uneven current distribution can easily lead to overheating of some cables, reduced efficiency of the power system, and power loss, which in turn affects the reliability and safety of the entire power system.

[0052] Magnetic field imbalance refers to the degree of inconsistency in the magnetic field around each cable due to the difference in current carried by each cable in the parallel cable. It is essentially a technical indicator to measure whether the current distribution of each cable in the parallel cable is uniform from the magnetic field dimension. Unbalanced magnetic field distribution may cause electromagnetic interference and affect the normal operation of other electronic equipment around the parallel cable. The difference in magnetic field between each cable will also affect the current carried by the cable.

[0053] Among them, the adjustment condition is a preset judgment condition used to determine whether the parallel cable needs to be adjusted for current imbalance. If the parallel cable meets the adjustment condition, it means that the current imbalance in the parallel cable at this time may affect the stable operation of the parallel cable system, and the parallel cable needs to be adjusted to ensure the stable operation of the power system.

[0054] The current balancing condition is a preset condition for determining whether the current carried by each cable in the parallel cable is evenly distributed. It can be understood that the current balancing condition can be determined in advance by the designer based on the regulation accuracy requirements of the cable system. For example, the current balancing condition can be that the carrying current of each cable is equal, or the current balancing condition can be that the current imbalance of the parallel cables is less than 5%.

[0055] Specifically, the control device can obtain the current data and magnetic field data of each cable based on the information acquisition device, determine the current imbalance and magnetic field imbalance of the parallel cables based on the current data and magnetic field data, and control the excitation device to operate until the parallel cables meet the current balance condition when it is determined that the parallel cables meet the adjustment conditions according to the current imbalance and magnetic field imbalance. The current is balanced by adjusting the inductive impedance of the cable, so that the reactance of the overloaded cable increases, thereby reducing its current flow, and the cable with lower reactance will share more current, so that the current can be distributed more evenly among multiple cables, reducing the risk of overheating of local cables due to carrying too high current.

[0056] In the above embodiment, the current data and magnetic field data of each cable in the parallel cable can be collected in real time through the information collection device in the system, so as to monitor the current distribution and magnetic field distribution of the parallel cable, and determine the current imbalance and magnetic field imbalance of the parallel cable based on each current data and each magnetic field data. When the parallel cable is determined to meet the adjustment conditions according to the current imbalance and magnetic field imbalance, the control device in the system can control the operation of the excitation device configured in the system until the parallel cable meets the current balance condition. By setting the information collection device in the system, no matter what environment the parallel cable is in or what dynamic changes its load undergoes, the control device can collect the current data and magnetic field data of each cable in real time through the information collection device, accurately understand the current distribution and magnetic field distribution of the parallel cable, and achieve rapid response to the change of cable current distribution. In the adjustment process, the control device can determine the current imbalance and magnetic field imbalance through the current data and magnetic field data, and accurately control the excitation device from the two dimensions of current and magnetic field, so as to achieve dynamic current sharing of the cable current, and effectively improve the accuracy and efficiency of the current imbalance adjustment of the double-split parallel cable.

[0057] In some embodiments, Figure 3 As shown, the information acquisition device 101 includes a current information acquisition component 301, a magnetic field information acquisition component 302, and a signal conversion circuit 303 which is communicatively connected to the current information acquisition component 301 and the magnetic field information acquisition component 302 respectively.

[0058] The current information acquisition component 301 is a hardware device for acquiring the current signal of each cable in the parallel cables. For example, the current information acquisition component 301 can be a current transformer respectively arranged on each cable. The current information acquisition component 301 can acquire the current signal of each cable in the parallel cables in real time, and the current signal can represent the specific current value of the corresponding cable.

[0059] The magnetic field information acquisition component 302 is a hardware device for collecting magnetic field signals of each cable in the parallel cables. For example, the magnetic field information acquisition component 302 can be a Hall sensor respectively set at the magnetic field information acquisition point of each cable. The magnetic field information acquisition component 302 can be set at the magnetic field information acquisition position of each cable to monitor and collect the magnetic field signal around each cable in the parallel cables in real time. The magnetic field signal can represent the magnetic induction intensity of the corresponding cable.

[0060] In some of the embodiments, the function of the magnetic field information acquisition component 302 is to monitor the magnetic field strength around the parallel cables in real time and continuously, and transmit the data to the control device for processing. The magnetic field information acquisition component 302 may include a plurality of high-precision Hall sensors distributed at different positions of the parallel cables to obtain the magnetic field strength information at each position. These sensors can not only measure the magnetic induction intensity around the cables, but also provide the magnetic field change trend in spatial distribution, ensuring that the system can detect the current imbalance more accurately.

[0061] In some embodiments, the Hall sensors are not only arranged on the cable surface, but also arranged in layers at different heights and angles of the parallel cables. This arrangement ensures all-round measurement of the magnetic field and improves the ability to perceive local cable magnetic field fluctuations, so that the system can more accurately adjust the output of the magnetic assist coil.

[0062] Among them, the signal conversion circuit 303 is used to convert the signal collected by the acquisition component into a digital signal circuit for data acquisition, control process, execution of calculation display readout or other purposes. For example, the signal conversion circuit 303 can be an AD conditioning circuit. The signal conversion circuit 303 can convert the current signal collected by the current information acquisition component 301 and the magnetic field signal collected by the magnetic field information acquisition component 302 into a digital signal, obtain current data and magnetic field data, and feed back to the control device. For example, the AD conditioning circuit can convert the current signal and the magnetic field signal into a digital signal through ADC analog-to-digital conversion.

[0063] In some of the embodiments, when the magnetic field information acquisition component 302 is a Hall sensor, the Hall sensor can collect the magnetic field signal of the external magnetic field of the cable, such as the magnetic field strength, and convert the magnetic field signal into a voltage signal. The signal conversion circuit 303 can convert the voltage signal into a digital signal and feed it back to the control device.

[0064] Specifically, the current information acquisition component 301 in the double-split parallel cable current imbalance adjustment system based on magnetic balance can collect the current signal of each cable in the parallel cable, convert the current signal into a digital signal through the signal conversion circuit 303, and obtain the current data of each cable. Similarly, the magnetic field information acquisition component 302 can collect the magnetic field signal of each cable in the parallel cable, convert the magnetic field signal into a digital signal through the signal conversion circuit 303, and obtain the magnetic field data of each cable.

[0065] In the above embodiment, through the combined action of the current information acquisition component and the magnetic field information acquisition component, the control device can quickly respond to changes in cable current distribution, adjust the working parameters of the excitation device, and accurately control the size of the reactance, thereby achieving dynamic current sharing of the cable current.

[0066] In some embodiments, Figure 4 As shown, the control device 103 includes a current inner loop control component 401 and a magnetic field outer loop control component 402 .

[0067] The current inner loop control component 401 can be used to adjust the excitation current output by the excitation device to ensure real-time control of the reactance adjustment of the cable.

[0068] The current inner loop control component 401 can determine the current imbalance of the parallel cables based on each current data. In some embodiments, a current imbalance calculation function or a current imbalance determination model is pre-set in the current inner loop control component 401, and the current imbalance calculation function or the current imbalance determination model can be called based on each current data to calculate the current imbalance for the parallel cables and determine the current imbalance of the parallel cables.

[0069] The current regulation condition is a preset judgment condition for judging whether the parallel cables need to be current regulated.

[0070] Specifically, the current inner loop control component 401 can determine the current imbalance of the parallel cables based on the current data. When it is determined that the parallel cables meet the current regulation conditions according to the current imbalance, it means that the parallel cables need to be current regulated. The current inner loop control component 401 can control the operation of the excitation device according to the current imbalance and adjust the output current of the excitation device.

[0071] The magnetic field outer ring control component 402 can be used to control the output current value of the AC current source, thereby dynamically adjusting the external magnetic field of each cable in the parallel cable.

[0072] Similarly, the magnetic field outer loop control component 402 can determine the magnetic field imbalance of the parallel cables based on the magnetic field data. In some embodiments, the magnetic field outer loop control component 402 is pre-set with a magnetic field imbalance calculation function or a magnetic field imbalance determination model, and can call the magnetic field imbalance calculation function or the magnetic field imbalance determination model based on the magnetic field data to perform magnetic field imbalance calculation for the parallel cables to determine the magnetic field imbalance of the parallel cables.

[0073] The magnetic field adjustment condition is a preset judgment condition for judging whether the parallel cables need to be adjusted for the magnetic field.

[0074] Specifically, the magnetic field outer loop control component 402 can determine the magnetic field imbalance of the parallel cable based on various magnetic field data. When it is determined that the parallel cable meets the magnetic field adjustment conditions according to the magnetic field imbalance, it means that the parallel cable needs to perform magnetic field adjustment. The magnetic field outer loop control component 402 can control the operation of the excitation device according to the magnetic field imbalance, and adjust the magnetic field strength of the excitation device. For example, the magnetic field outer loop control component 402 can control the output current value of the AC current source, that is, adjust the excitation current, so as to dynamically adjust the magnetic field strength of the excitation device, and then dynamically adjust the external magnetic field of the parallel cable.

[0075] In the above embodiment, in the entire double closed-loop control system, the current inner loop is mainly responsible for adjusting the current, and the magnetic field outer loop is responsible for adjusting the magnetic field difference caused by the unbalanced current. Through the double closed-loop control, the impedance value of the parallel cable can be balanced more accurately, so as to quickly and effectively adjust the current imbalance of the parallel cable under dynamic conditions and ensure the operational stability of the power system.

[0076] In some embodiments, Figure 5 As shown, the current inner loop control component 401 includes a current data processing unit 501 and a current inner loop regulator 502, and the magnetic field outer loop control component 402 includes a magnetic field data processing unit 503 and a magnetic field outer loop regulator 504. The current data processing unit 501 and the magnetic field data processing unit 503 are respectively communicated with the information acquisition device 101, and the current inner loop regulator 502 and the magnetic field outer loop regulator 504 are respectively electrically connected to the excitation device 102.

[0077] Among them, the current data processing unit 501 and the magnetic field data processing unit 503 are processing units with logic processing capabilities. The current data processing unit 501 can perform logic analysis and processing on the current data to determine the current imbalance of the parallel cables and compare the current imbalance with the current imbalance threshold, and judge whether the parallel cables meet the current regulation conditions. Similarly, the magnetic field data processing unit 503 can perform logic analysis and processing on the magnetic field data to determine the magnetic field imbalance of the parallel cables and compare the magnetic field imbalance with the magnetic field imbalance threshold, and judge whether the parallel cables meet the magnetic field regulation conditions.

[0078] Among them, the current imbalance threshold is a preset threshold parameter used to determine whether the parallel cable needs current regulation, and the magnetic field imbalance threshold is a preset threshold parameter used to determine whether the parallel cable needs magnetic field regulation. It can be understood that both the current imbalance threshold and the magnetic field imbalance threshold can be determined by the designer based on experimental data or empirical data.

[0079] The current inner loop regulator 502 and the magnetic field outer loop regulator 504 are both based on feedback control theory and are regulating devices that adjust the output signal according to the size of the input error signal to reduce the error, such as PI regulators.

[0080] The current inner loop regulator 502 can call the proportional integral control strategy, i.e., the PI control strategy, to control the operation of the excitation device according to the current difference. The magnetic field outer loop regulator 504 can call the PI control strategy to control the operation of the excitation device according to the magnetic field difference. Among them, the current difference can represent the current information of the difference between the current imbalance of the parallel cables and the current imbalance threshold. The magnetic field difference can represent the magnetic field information of the difference between the magnetic field imbalance of the parallel cables and the magnetic field imbalance threshold.

[0081] Specifically, the current data processing unit 501 can determine the current imbalance of the parallel cable based on each current data. When the current imbalance is greater than the current imbalance threshold, it means that the parallel cable meets the current regulation condition. The current data processing unit 501 can determine the current difference according to the current imbalance and the current imbalance threshold, and input the current difference to the current inner loop regulator 502. The current inner loop regulator 502 can call the PI control strategy to control the operation of the excitation device according to the current difference, such as adjusting the excitation current output by the excitation device. Similarly, the magnetic field data processing unit 503 can determine the magnetic field imbalance of the parallel cable based on each magnetic field data. When the magnetic field imbalance is greater than the magnetic field imbalance threshold, it means that the parallel cable meets the magnetic field regulation condition, and determine the magnetic field difference according to the magnetic field imbalance and the magnetic field imbalance threshold, and input the magnetic field difference to the magnetic field outer loop regulator 504. The magnetic field outer loop regulator 504 can call the PI control strategy to control the operation of the excitation device according to the magnetic field imbalance, such as adjusting the excitation current output by the excitation device.

[0082] In some of the embodiments, since current changes and magnetic field changes affect each other, during the adjustment process of the current inner loop regulator 502 and the magnetic field outer loop regulator 504, the current data processing unit 501 and the magnetic field data processing unit 503 can continuously execute the steps of determining the current imbalance and the magnetic field imbalance based on the current data and the magnetic field data, and further judging whether the parallel cable meets the current regulation conditions or the magnetic field regulation conditions, and then controlling the operation of the regulator based on the new current difference and the magnetic field difference, and through feedback regulation, quickly and accurately responding to changes in current imbalance, to achieve uniform current distribution in the parallel cable system.

[0083] In the above embodiments, through the collaborative cooperation among the current data processing unit, the current inner loop regulator, the magnetic field data processing unit, and the magnetic field outer loop regulator, it is possible to quickly and accurately respond to changes in current imbalance based on the dual control mechanism of the current inner loop and the magnetic field outer loop, thereby achieving uniform current distribution in the parallel cable system.

[0084] In some embodiments, the excitation device includes at least one auxiliary magnetic coil disposed on the parallel cable. The auxiliary magnetic coil is connected to the control device and is used to accept the control operation of the control device to construct an auxiliary magnetic field for the parallel cable, and the magnetic flux of the auxiliary magnetic field is opposite to the cable magnetic field of the parallel cable.

[0085] Among them, the function of the auxiliary magnetic coil is to weaken the mutual magnetic field interference between the parallel cables by generating a magnetic flux in the opposite direction to the excitation direction of the parallel cable core wire, thereby balancing the current distribution.

[0086] In some of the embodiments, the auxiliary magnetic coil may be surrounded by a magnetic ring made of a high magnetic permeability material to ensure the conduction efficiency of its magnetic field.

[0087] Specifically, the auxiliary magnetic coil is connected to the control device and can receive the control operation of the control device, that is, to build an auxiliary magnetic field for the parallel cables according to the instructions sent by the control device. The magnetic flux of the auxiliary magnetic field is opposite to the direction of the cable magnetic field of the parallel cables, thereby weakening the magnetic field difference caused by current imbalance between the parallel cables. This mechanism can effectively balance the current distribution in the cable and avoid overheating of the cable due to excessive current. The magnetic field generated by the auxiliary magnetic coil is controlled by the controller, and the magnetic field strength is changed by adjusting the excitation current of the coil, thereby dynamically responding to changes in the current imbalance of the parallel cables.

[0088] In some embodiments, the control device further comprises a fault detection component.

[0089] Among them, the fault detection component is a module component used to perform fault detection on the entire parallel cable system and monitor the operating status of the system.

[0090] Specifically, the fault detection component can perform abnormality detection on the parallel cables based on the current data and magnetic field data of each cable to obtain abnormality detection results; when the abnormality detection results indicate that there is an abnormality in the parallel cables, an operation protection mechanism matching the abnormal situation of the parallel cables is initiated according to the abnormality detection results.

[0091] In some of the embodiments, the fault detection component can determine whether there is an abnormal cable with current overload among the cables based on the current data of each cable. If so, the fault detection component can issue a warning signal and take corresponding protective measures to prevent equipment overload or damage.

[0092] In some of the embodiments, the fault detection component can determine whether there is an abnormal cable with abnormal magnetic field fluctuations among the cables based on the magnetic field data of each cable. If so, the fault detection component will automatically record the abnormal fluctuation value and trigger an early warning based on the set safety threshold, promptly reminding the operator to check the system to prevent cable overheating or insulation failure due to excessive current.

[0093] In some of the embodiments, the fault detection component can determine the current imbalance and / or magnetic field strength of the parallel cables based on the current data and / or magnetic field data of each cable. When the current imbalance and / or magnetic field strength exceeds the safe range, the fault detection component can activate the automatic protection mechanism to control the excitation current of the excitation device to automatically reduce or shut down, and at the same time shut down the power supply of related equipment through feedback signals to ensure that the entire system is in a safe operating state.

[0094] In some of the embodiments, the fault detection component can also perform fault recording operations, that is, when abnormal current or magnetic field fluctuations are detected, the fault detection component can automatically generate a fault report, including abnormal current value, magnetic field strength, timestamp and other information, so that the operator can quickly locate the fault point according to the fault report and take corresponding measures.

[0095] In the above embodiment, by setting up a fault detection component, it is possible to respond quickly when an abnormal situation occurs in the parallel cable system, determine and execute an operation protection mechanism matching the abnormal situation, so as to ensure the operation stability of the system.

[0096] In some embodiments, the control device also includes a model building component.

[0097] Among them, the model building component is a component module used to build a real-time magnetic field distribution model for parallel cables. By building a real-time magnetic field distribution model, we can have a deeper understanding of the interaction of cable magnetic fields and the strength distribution of local magnetic fields.

[0098] Specifically, the model building component can obtain multi-point magnetic field data of parallel cables and generate a magnetic field distribution model of the parallel cables based on the multi-point magnetic field data; the magnetic field distribution model is used to characterize the interaction information of the cable magnetic fields of the parallel cables and the strength distribution information of the local magnetic fields of the parallel cables.

[0099] Among them, multi-point magnetic field data can be collected by the magnetic field information collection component. Designers can pre-set multiple magnetic field information collection components at key detection positions of parallel cables to collect magnetic field strengths at different positions in real time, providing more comprehensive multi-point magnetic field data for the control device. It is understandable that in order to improve the measurement accuracy and range, different types of magnetic field information collection components can be used, such as fluxgate magnetometers, inductive magnetic field sensors, Hall sensors, etc., to form a composite magnetic field measurement system to detect multi-point magnetic field data of parallel cables.

[0100] In some of the embodiments, a multi-dimensional magnetic field analysis model is pre-set in the model building component. After obtaining multi-point magnetic field data of the parallel cables, the model building component can call the multi-dimensional magnetic field analysis model to use a high-precision algorithm to analyze the multi-point magnetic field data to determine the magnetic field changes.

[0101] In some of the embodiments, the control device may also periodically calibrate the magnetic field sensor to ensure the accuracy and stability of its measurement. A known standard magnetic field may be used for calibration to eliminate systematic errors.

[0102] In the above embodiment, the model building component can be used to accurately model the parallel cables and generate a magnetic field distribution model of the parallel cables, so that the interaction of the cable magnetic fields of the parallel cables and the strength distribution of the local magnetic fields can be more intuitively displayed.

[0103] In some embodiments, the control device also includes a trend prediction component.

[0104] Among them, the trend prediction component is a module component used to predict the magnetic field distribution information of the parallel cables under different working conditions, and then predict the unbalance trend of the parallel cables.

[0105] Specifically, the trend prediction component can predict the magnetic field distribution information of the parallel cables under different working conditions according to the magnetic field distribution model, and perform unbalance trend prediction on the parallel cables based on the magnetic field distribution information to obtain the current unbalance trend prediction results of the parallel cables under the corresponding working conditions.

[0106] In some of the embodiments, the trend prediction component can also call a multidimensional magnetic field analysis model to predict the magnetic field distribution information of the parallel cable under different working conditions. Specifically, the trend prediction component can call a multidimensional magnetic field analysis model based on the magnetic field distribution model and related prediction parameters, such as the cable current prediction value and the magnetic induction intensity prediction value, and analyze the change of the magnetic field of the magnetic field distribution model under the corresponding related prediction parameters based on the related prediction parameters, so as to predict the magnetic field distribution of the parallel cable under different working conditions, and obtain the magnetic field distribution information of the parallel cable under different working conditions. The trend prediction component then predicts the imbalance trend of the parallel cable based on the magnetic field distribution information, for example, through a preset trend prediction model or trend prediction function, the current imbalance trend prediction result of the parallel cable under the corresponding working conditions is determined. This real-time modeling helps the control system predict the current imbalance trend, adjust the magnetic field in advance, and avoid large current fluctuations.

[0107] In some embodiments, the control device also includes a remote control component, which is used to generate a monitoring page for the parallel cable, send the monitoring page to a remote terminal for display, respond to an excitation device adjustment instruction triggered by the monitoring page, obtain adjustment operation control parameters, and control the operation of the excitation device according to the adjustment operation control parameters.

[0108] Among them, the remote control component is a module component used to build an interactive channel with a remote terminal and perform remote interaction.

[0109] Among them, the monitoring page is used to display the operating status information of the parallel cable and the operating information of the excitation equipment, such as the current distribution of the parallel cable, the magnetic field strength, the equipment operating status and other key information.

[0110] Among them, the excitation device adjustment instruction can be triggered by the user based on the remote terminal for the monitoring page. For example, the user can adjust the operation information of the excitation device on the monitoring page based on the remote terminal to trigger the excitation device adjustment instruction. For example, the operator can remotely adjust the excitation current of the excitation device, or modify the control strategy of the excitation device according to the actual load conditions to ensure that the parallel cable is always in the best operating state. The remote control component will obtain the adjustment operation control parameters based on the adjustment information input operation triggered by the user through the remote terminal.

[0111] Specifically, the remote control component can generate a monitoring page for the parallel cable, send the monitoring page to the remote terminal for display, respond to the excitation device adjustment instruction triggered by the monitoring page, obtain the adjustment operation control parameters, and control the operation of the excitation device according to the adjustment operation control parameters.

[0112] In the above embodiment, through the remote control component, the double-split parallel cable current imbalance adjustment system based on magnetic balance can establish a communication connection with the remote terminal, so that the user can view the operating status of the cable system in real time based on the remote terminal, and at the same time adjust the cable system accordingly according to actual needs, thereby improving the user's convenience.

[0113] In some embodiments, Figure 6 As shown, a double-split parallel cable current imbalance adjustment system based on magnetic balance is provided, and the system may include a current transformer 601, a Hall sensor 602, a magnetic assist coil 603, an AD conditioning circuit 604 and a control device 103.

[0114] The following is a description of the function of each key component:

[0115] The auxiliary magnetic coil 603 is connected to the inner current regulator and the outer magnetic field regulator in the control device 103, respectively, and the control device 103 adjusts the magnetic field strength according to the current imbalance. The auxiliary magnetic coil 603 is used to weaken the mutual magnetic field interference between the parallel cables by generating a magnetic flux in the opposite direction of the excitation direction of the parallel cable core wire, thereby balancing the current distribution. The auxiliary magnetic coil 603 is surrounded by a magnetic ring made of high magnetic permeability material to ensure the conduction efficiency of its magnetic field.

[0116] The current transformer 601 is used to collect the current data of each phase of the parallel cable. The current signal of each cable is captured by the current transformer 601 and transmitted to the AD conditioning circuit 604 for preprocessing. After the analog-to-digital converter (ADC) converts these analog current signals into digital signals, they are transmitted to the control device 103 for calculating the current imbalance. The precise current collection function of the current transformer 601 ensures that the system can respond quickly and in real time to changes in the cable current, helping the control device 103 to determine whether the magnetic field strength of the magnetic assist coil 603 needs to be adjusted.

[0117] Hall sensor 602: Hall sensor 602 is arranged around the parallel cables and is mainly used to monitor the magnetic field strength between the parallel cables. The Hall effect can be used to convert the magnetic field strength into electrical signals. These electrical signals are converted into digital signals through AD conditioning circuit 604 and transmitted to control device 103 for calculating the magnetic field difference between the parallel cables. Through the feedback system, control device 103 can accurately adjust the excitation current of the auxiliary magnetic coil 603 according to the magnetic field data detected by Hall sensor 602 to offset the magnetic field difference caused by current imbalance, thereby achieving the purpose of balancing the cable current.

[0118] Control device 103: Responsible for receiving data collected by current transformer 601 and Hall sensor 602, and adjusting the current amplitude and magnetic field strength of auxiliary magnetic coil 603 in real time according to the current imbalance and magnetic field changes, and finally achieving dynamic balance of current. Control device 103 is also equipped with a dual closed-loop control system, which controls the current through the outer loop and adjusts the magnetic field through the inner loop to ensure stable operation of the system.

[0119] The control device 103 includes a current data processing unit 501, a current inner loop regulator 502, a magnetic field data processing unit 503, a magnetic field outer loop regulator 504, a fault detection component 605, a model building component 606, a trend prediction component 607, and a remote control component 608. The current transformer 601 and the Hall sensor 602 are respectively connected to the AD conditioning circuit 604, the AD conditioning circuit 604 is respectively connected to each unit and component in the control device 103, and the magnetic assist coil 603 is respectively connected to the current inner loop regulator and the magnetic field outer loop regulator in the control device 103.

[0120] The working principle of the double-split parallel cable current imbalance adjustment system based on magnetic balance is that the current transformer 601 monitors the current value of each phase parallel cable in real time, and the Hall sensor 602 collects the magnetic field strength around the cable. The control device 103 analyzes and processes these data to determine the imbalance of the current. Once the current is unevenly distributed, the system will weaken the magnetic field interference between the cables by adjusting the magnetic field strength of the auxiliary magnetic coil 603, thereby balancing the current. When the current is evenly distributed, the system will reduce or turn off the excitation strength of the auxiliary magnetic coil 603 to ensure that the current of the entire system is always kept within a reasonable range.

[0121] The double-split parallel cable current imbalance regulation system based on magnetic balance adopts a double closed-loop control strategy, which mainly includes:

[0122] Current inner loop control: The inner loop processes the current data collected by the current transformer 601 in real time, calculates the current deviation, and feeds it back to the PI regulator. The PI regulator generates a corresponding control signal based on the deviation to adjust the current output of the magnetic assist coil 603.

[0123] Magnetic field outer loop control: The outer loop uses the magnetic field strength detected by the Hall sensor 602 to feedback the magnetic field changes between the parallel cables. The magnetic field strength error signal is transmitted to the PI regulator for adjustment, and finally controls the magnetic field strength of the auxiliary magnetic coil 603.

[0124] Through the dual control mechanism of the inner current loop and the outer magnetic field loop, the present invention can quickly and accurately respond to changes in current imbalance and achieve uniform distribution of current in the parallel cable system.

[0125] Among them, the working process of the double-split parallel cable current unbalance adjustment system based on magnetic balance can be divided into the following three main steps:

[0126] Current collection and processing: The current data on each line of the parallel cable is collected in real time through the current transformer 601, and the data is transmitted to the control device 103. The control device 103 obtains the current imbalance between each phase cable by sorting and calculating the data.

[0127] Calculation and comparison of imbalance: Compare the calculated current imbalance with the preset reference value. If the current deviation of a phase in the cable system exceeds the set threshold, the system will determine that the current is unbalanced. At this time, the control device 103 will start the auxiliary magnetic coil 603, and use the coil to generate a magnetic flux in the opposite direction of the magnetic field between the parallel cables, thereby weakening the magnetic field between the parallel cables and achieving the effect of balancing the current.

[0128] Dynamic regulation and current sharing: When the current imbalance is large, the control device 103 will adjust the power amplitude of the magnetic assist coil 603 so that the magnetic assist coil 603 generates a stronger magnetic field to offset the magnetic induction between the parallel cables, so that the same-phase current is evenly distributed. On the contrary, when the imbalance is small, the control device 103 will reduce the excitation intensity of the magnetic assist coil 603 so that the current is balanced between the parallel cables, thereby achieving dynamic regulation of the current.

[0129] Specifically, the control process and working steps of the double-split parallel cable current unbalance adjustment system based on magnetic balance are as follows:

[0130] Data collection: The current transformer 601 collects the current data of each parallel cable, and the Hall sensor 602 collects the magnetic field strength around the cable.

[0131] Data processing and calculation: The collected current signal and magnetic field signal are processed by the AD conditioning circuit 604, and then converted into digital signals by the ADC and transmitted to the control device 103.

[0132] Calculating current imbalance and magnetic field imbalance: The current data processing unit 501 in the control device 103 can calculate the current imbalance of the parallel cables according to the sensor data. The magnetic field data processing unit 503 can calculate the magnetic field imbalance of the parallel cables according to the sensor data.

[0133] Double closed-loop regulation: The control device 103 adjusts the excitation current of the auxiliary magnetic coil 603 according to the calculation results through the double closed-loop PI regulator, that is, the current inner loop regulator 502 and the magnetic field outer loop regulator 504, to generate a magnetic flux in the opposite direction to the cable magnetic field, weaken the magnetic field caused by the unbalanced current, and thus make the cable current tend to be balanced.

[0134] Real-time control: The system monitors the current and magnetic field data in real time, and dynamically adjusts the working state of the magnetic assist coil 603 to ensure that the cable is always within a safe working range and prevent overload or cable heating.

[0135] System safety and protection mechanism: The system is also equipped with an automatic safety protection mechanism. When the fault detection component 605 in the control device 103 detects that the cable current or magnetic field exceeds the set safety range, it will issue an alarm signal and start the protection mechanism to automatically reduce or shut down the excitation current of the auxiliary magnetic coil 603 to ensure the safe operation of the system and the cable. In addition, the fault detection component 605 will also record abnormal conditions and related data for fault analysis and system maintenance.

[0136] Application scenarios and extensions: The dual-split parallel cable current imbalance adjustment system based on magnetic balance is suitable for various complex parallel cable systems, especially those where the workload often fluctuates or the environmental conditions are complex. By introducing an intelligent control system, the current equalization effect of the parallel cable system can be significantly improved, the cable life can be extended, and the system maintenance cost can be reduced. The dual-split parallel cable current imbalance adjustment system based on magnetic balance can also achieve more functions through software upgrades and hardware expansions, such as integration with the power monitoring platform to achieve remote monitoring and fault diagnosis, further improving the intelligence level of the system.

[0137] The double-split parallel cable current unbalance regulation system based on magnetic balance can further add the following implementation steps and functions to enhance the performance of the regulation system, especially for the refinement of magnetic field measurement and feedback:

[0138] The first is the integration and setting of magnetic field information acquisition components.

[0139] Magnetic field sensor layout: Multiple Hall sensors 602 are set at key positions of the parallel cable to collect the magnetic field strength at different positions in real time. This layout can provide more comprehensive magnetic field data, which helps to accurately adjust the excitation current of the auxiliary magnetic coil 603. Multi-channel data acquisition: Each Hall sensor 602 is connected to an independent AD conditioning circuit 604 to ensure that magnetic field data at multiple points can be collected simultaneously and processed by a high-speed data acquisition system to reduce delays and improve response speed.

[0140] The second is data fusion and analysis.

[0141] Magnetic field data fusion: The magnetic field data processing unit 503 of the control device 103 fuses the magnetic field data from the multiple Hall sensors 602 and uses a weighted average algorithm or other data processing methods to obtain the overall magnetic field strength and distribution information of the entire parallel cable system.

[0142] Imbalance assessment: The current data processing unit 501 of the control device 103 calculates the correlation between the current imbalance and the magnetic field strength imbalance in real time based on the current data collected by the current transformer 601, and optimizes the control strategy.

[0143] The third is the optimization of dynamic adjustment strategies.

[0144] Adaptive control algorithm: Develop an adaptive control algorithm to enable the current data processing unit 501 and the magnetic field data processing unit 503 of the control device 103 to dynamically adjust the excitation current of the magnetic assist coil 603 according to the current and magnetic field data collected in real time. The algorithm is based on historical data and current status, and can be quickly adjusted under different working conditions to maintain dynamic balance of current.

[0145] Application of prediction model: The model building component 606 and the trend prediction component 607 of the control device 103 can pre-establish a prediction model based on historical operation data to predict possible current imbalance in the future, so as to take measures to make adjustments in advance.

[0146] The fourth is the fault detection and early warning mechanism.

[0147] Real-time monitoring and abnormality detection: The fault detection component 605 of the control device 103 can implement a fault detection algorithm to monitor the operating status of the system, including parameters such as current, magnetic field strength, and the excitation current of the magnetic assist coil 603. When an abnormal situation (such as current overload or magnetic field abnormality) is detected, the fault detection component 605 will automatically adjust the excitation current of the magnetic assist coil 603 or issue an alarm.

[0148] Data recording and analysis: The fault detection component 605 records historical data such as current, magnetic field, and working status of the magnetic assist coil 603, providing a basis for subsequent fault analysis and maintenance. Reports can be set to be generated regularly to analyze operating efficiency and possible problems.

[0149] The fifth is user interface and remote monitoring.

[0150] Human-machine interface: The remote control component 608 of the control device 103 is designed with a user-friendly interface, which enables operators to view the operating status of the cable system, magnetic field strength, current value and other key parameters in real time. The interface can also display alarms and recommended operations.

[0151] Remote monitoring function: remote monitoring and control can be realized through Internet connection. Operators can obtain data in real time at different locations, adjust the working status of the magnetic assist coil 603, and perform troubleshooting and maintenance.

[0152] The sixth is testing and verification.

[0153] System testing: In actual applications, the dynamic control device is fully tested to verify its performance under different loads and environmental conditions to ensure the stability and reliability of the system.

[0154] Optimization iteration: Based on the test results, the control algorithm, data processing method and system configuration are optimized to improve the overall performance and response speed of the system.

[0155] The seventh is testing and verification.

[0156] Combination of multiple sensing technologies: Consider using different types of magnetic field sensors (such as fluxgate magnetometers, inductive magnetic field sensors, etc.) in combination with the Hall sensor 602 to form a composite magnetic field measurement system to improve measurement accuracy and range.

[0157] Calibration mechanism: Regularly calibrate the magnetic field sensor to ensure the accuracy and stability of its measurement. Calibration can be performed using a known standard magnetic field to eliminate systematic errors.

[0158] Through the above-added implementation steps, the double-split parallel cable current imbalance adjustment system based on magnetic balance can not only monitor and adjust the current imbalance of the parallel cables in real time, but also accurately measure and analyze the magnetic field to ensure efficient and safe operation of the system.

[0159] The above-mentioned double-split parallel cable current unbalance adjustment system based on magnetic balance has the following significant advantages:

[0160] Improve the service life of cables: By balancing the current distribution of each phase cable, local cable overheating is avoided, cable insulation aging is reduced, and the service life of cables is extended.

[0161] Improve system efficiency: The system can ensure uniform distribution of current under dynamic load conditions, maximize the use of each parallel cable, reduce energy loss, and improve the transmission efficiency of the power system.

[0162] Reduce the risk of failure: By weakening the magnetic field interference between cables, the impact of current imbalance on power equipment is reduced, thereby improving the safety and stability of the system.

[0163] Intelligent control: The system can monitor and adjust current and magnetic field in real time, has a high degree of intelligence and dynamic response capabilities, and is suitable for various complex power system scenarios.

[0164] Through the above technical scheme, the double-split parallel cable current imbalance adjustment system based on magnetic balance effectively solves the technical problem of parallel cable current imbalance in the prior art and significantly improves the operating efficiency and safety of the power system.

[0165] At the same time, the double-split parallel cable current imbalance adjustment system based on magnetic balance can also realize spatial magnetic field gradient analysis, that is, by analyzing the magnetic field gradients at different positions of the cable, the system can detect the uneven distribution of the cable current and adjust the excitation intensity of the auxiliary magnetic coil 603 accordingly, thereby eliminating the magnetic field interference problem caused by excessive local cable current.

[0166] The newly added magnetic field information acquisition component of the double-split parallel cable current imbalance adjustment system based on magnetic balance can further optimize the adjustment mechanism of the magnetic assist coil 603 and form an intelligent magnetic field adjustment mechanism based on magnetic field feedback. Through the magnetic field strength feedback signal monitored by the Hall sensor 602, the magnetic field information processing unit of the control device 103 can more accurately adjust the excitation current and magnetic flux direction of the magnetic assist coil 603, so that it can quickly respond to the imbalance of current between parallel cables.

[0167] Dynamic magnetic field feedback mechanism: The newly added dynamic magnetic field feedback mechanism combines multi-dimensional magnetic field analysis and real-time monitoring, and ensures that the system can continuously maintain the balance of parallel cable current under different workloads by continuously adjusting the output current and magnetic flux of the magnetic assist coil 603. This mechanism has high dynamic responsiveness and can adapt to instantaneous load changes in the power system.

[0168] Precise excitation regulation: Based on the real-time magnetic field data collected by the Hall sensor 602, the system can accurately adjust the excitation current of the magnetic assist coil 603. By calculating the difference in magnetic induction intensity around each cable, the control device 103 can accurately control the reverse magnetic flux generated by the magnetic assist coil 603 according to the imbalance of the cable magnetic field, further improving the current balancing effect.

[0169] Precise adjustment of cable impedance: The system also supports precise adjustment of parallel cable impedance. Through precise analysis of current imbalance and magnetic field distribution, the control device 103 can adjust the impedance of parallel cables in real time to eliminate the imbalance problem caused by differences in cable manufacturing or laying.

[0170] Cable impedance balancing: Using the magnetic field information provided by the Hall sensor 602, the control device 103 can analyze the impedance changes of each phase cable in real time, and balance the impedance difference by controlling the excitation current of the auxiliary magnetic coil 603, ensuring that all parallel cables can share the same current under different working conditions.

[0171] Data storage and fault recording: In order to improve the long-term operation stability of the system, the system has added data storage and fault recording functions. The data collected by the magnetic field information acquisition component, including cable current, magnetic induction intensity, excitation current value, etc., will be stored in the system's storage unit for subsequent analysis.

[0172] Historical data analysis: By analyzing historical data, the system can find the current distribution pattern of parallel cables under different loads and working conditions, which helps to predict and prevent the occurrence of current imbalance in advance. At the same time, the data storage function can also help the system quickly locate the source of the problem when a fault occurs.

[0173] Based on the same technical concept, in some embodiments, Figure 7 As shown, the present application provides a method for adjusting the current imbalance of a double-split parallel cable based on magnetic balance, and the method is applied to Figure 1 The control device in the example is used to illustrate, including the following steps:

[0174] S702, obtaining current data and magnetic field data of each cable in the parallel cables.

[0175] S704: Determine the current imbalance and magnetic field imbalance of the parallel cables based on the current data and the magnetic field data.

[0176] S706: When it is determined that the parallel cables meet the adjustment condition according to the current imbalance and the magnetic field imbalance, an auxiliary magnetic field is constructed for the parallel cables until the parallel cables meet the current balance condition.

[0177] The auxiliary magnetic field is used to eliminate the magnetic field effect caused by the unbalanced current in the parallel cables.

[0178] It can be understood that the specific implementation of S702-S706 is basically the same as that recorded in the system embodiment, and will not be repeated here.

[0179] In the above-mentioned method for adjusting the current imbalance of the double-split parallel cable based on magnetic balance, the control device can collect the current data and magnetic field data of each cable in the parallel cable in real time, so as to monitor the current distribution and magnetic field distribution of the parallel cable, determine the current imbalance and magnetic field imbalance of the parallel cable based on each current data and each magnetic field data, and when it is determined that the parallel cable meets the adjustment conditions according to the current imbalance and magnetic field imbalance, the excitation device configured in the control system is operated until the parallel cable meets the current balance condition. By collecting the current data and magnetic field data in real time, the control device accurately understands the current distribution and magnetic field distribution of the parallel cable, and realizes a rapid response to the change of the cable current distribution. During the adjustment process, the control device can accurately control the excitation device from the two dimensions of current and magnetic field through the current imbalance and magnetic field imbalance determined by the current data and magnetic field data, and realize the dynamic current sharing of the cable current, which effectively improves the accuracy and adjustment efficiency of the current imbalance adjustment of the double-split parallel cable.

[0180] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0181] Based on the same inventive concept, the embodiment of the present application also provides a double-split parallel cable current imbalance adjustment device based on magnetic balance for implementing the above-mentioned double-split parallel cable current imbalance adjustment method based on magnetic balance. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above-mentioned method, so the specific limitations in the embodiments of one or more parallel cable current imbalance adjustment devices provided below can refer to the limitations of the parallel cable current imbalance adjustment method above, and will not be repeated here.

[0182] In some embodiments, Figure 8 As shown, a current imbalance adjustment device 800 for double-split parallel cables based on magnetic balance is provided, comprising: a data acquisition module 801, an imbalance determination module 802 and an adjustment module 803, wherein:

[0183] The data acquisition module 801 is used to acquire the current data and magnetic field data of each cable in the parallel cables.

[0184] The imbalance determination module 802 is used to determine the current imbalance and magnetic field imbalance of the parallel cables based on the current data and the magnetic field data.

[0185] The adjustment module 803 is used to construct an auxiliary magnetic field for the parallel cables when it is determined that the parallel cables meet the adjustment conditions according to the current imbalance and the magnetic field imbalance, until the parallel cables meet the current balance conditions; the auxiliary magnetic field is used to eliminate the magnetic field effect caused by the current imbalance of the parallel cables.

[0186] Each module in the above-mentioned magnetic balance-based double-split parallel cable current imbalance adjustment device can be fully or partially implemented by software, hardware and their combination. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the corresponding operations of each of the above modules.

[0187] In some embodiments, a computer device is provided, which may be a control device, and its internal structure diagram may be as follows: Fig. 9 As shown. The computer device includes a processor, a memory and a network interface connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store current data, magnetic field data, current imbalance, magnetic field imbalance and other data. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a current imbalance adjustment method for a double-split parallel cable based on magnetic balance is implemented.

[0188] Those skilled in the art will understand that Fig. 9 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0189] In some embodiments, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, specific steps of the embodiment of the method for adjusting current imbalance of double-split parallel cables based on magnetic balance are implemented.

[0190] In some embodiments, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the specific steps of the embodiment of the method for adjusting the current imbalance of double-split parallel cables based on magnetic balance are implemented.

[0191] In some embodiments, a computer program product is provided, including a computer program, which, when executed by a processor, implements the specific steps of the embodiment of the method for adjusting current imbalance of double-split parallel cables based on magnetic balance.

[0192] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties. In addition, the acquisition, storage, processing, and transmission of data are in compliance with relevant laws and regulations.

[0193] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0194] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0195] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A double-split parallel cable current imbalance adjustment system based on magnetic balance, characterized in that: The system includes an information acquisition device, an excitation device, and a control device which is respectively connected to the information acquisition device and the excitation device for communication; The information acquisition device is used to collect current data and magnetic field data of each cable in the parallel cables; The excitation device is used to construct an auxiliary magnetic field for the parallel cables to eliminate the magnetic field effect caused by the unbalanced current of the parallel cables; The control device is used to obtain each of the current data and each of the magnetic field data, and determine the current imbalance and magnetic field imbalance of the parallel cables based on each of the current data and each of the magnetic field data; When it is determined that the parallel cables meet the adjustment condition according to the current imbalance and the magnetic field imbalance, the excitation device is controlled to operate until the parallel cables meet the current balance condition.

2. The system according to claim 1, characterized in that The information acquisition device includes a current information acquisition component, a magnetic field information acquisition component, and a signal conversion circuit that is communicatively connected to the current information acquisition component and the magnetic field information acquisition component respectively; The current information acquisition component is used to collect the current signal of each cable in the parallel cables; The magnetic field information acquisition component is used to collect the magnetic field signal of each cable in the parallel cables; The signal conversion circuit is connected to the control device, and is used to perform signal conversion on each of the current signals and each of the magnetic field signals to obtain current data and magnetic field data of each of the cables.

3. The system according to claim 1, characterized in that The control device includes a current inner loop control component and a magnetic field outer loop control component; The current inner loop control component is used to determine the current imbalance of the parallel cables based on each of the current data, and when it is determined according to the current imbalance that the parallel cables meet the current regulation conditions, control the operation of the excitation device according to the current imbalance to adjust the output current of the excitation device; The magnetic field outer loop control component is used to determine the magnetic field imbalance of the parallel cable based on each of the magnetic field data. When it is determined that the parallel cable meets the magnetic field adjustment conditions according to the magnetic field imbalance, the operation of the excitation device is controlled according to the magnetic field imbalance to adjust the magnetic field strength of the excitation device.

4. The system according to claim 3, characterized in that The current inner loop control component includes a current data processing unit and a current inner loop regulator; the magnetic field outer loop control component includes a magnetic field data processing unit and a magnetic field outer loop regulator; the current data processing unit and the magnetic field data processing unit are respectively connected to the information acquisition device for communication; the current inner loop regulator and the magnetic field outer loop regulator are respectively connected to the excitation device for electrical communication; The current data processing unit is used to determine the current imbalance of the parallel cables based on each of the current data, and when the current imbalance is greater than the current imbalance threshold, determine the current difference according to the current imbalance and the current imbalance threshold, and input the current difference to the current inner loop regulator; The current inner loop regulator is used to call a proportional-integral control strategy to control the operation of the excitation device according to the current difference; The magnetic field data processing unit is used to determine the magnetic field imbalance of the parallel cables based on each of the magnetic field data, and when the magnetic field imbalance is greater than the magnetic field imbalance threshold, determine the magnetic field difference according to the magnetic field imbalance and the magnetic field imbalance threshold, and input the magnetic field difference to the magnetic field outer loop regulator; The magnetic field outer loop regulator is used to call a proportional-integral control strategy to control the operation of the excitation device according to the magnetic field imbalance.

5. The system according to claim 1, characterized in that The excitation device includes at least one auxiliary magnetic coil arranged on the parallel cable; the auxiliary magnetic coil is connected to the control device, and is used to accept the control operation of the control device to build an auxiliary magnetic field for the parallel cable, and the magnetic flux of the auxiliary magnetic field is opposite to the cable magnetic field of the parallel cable.

6. The system according to any one of claims 1 to 5, characterized in that: The control device also includes a fault detection component; The fault detection component is used to perform abnormality detection on the parallel cables according to the current data and magnetic field data of each of the cables to obtain abnormality detection results; In a case where the abnormality detection result indicates that the parallel cables are abnormal, an operation protection mechanism matching the abnormality of the parallel cables is started according to the abnormality detection result.

7. The system according to any one of claims 1 to 5, characterized in that: The control device also includes a model building component; The model building component is used to obtain multi-point magnetic field data of the parallel cables and generate a magnetic field distribution model of the parallel cables based on the multi-point magnetic field data; the magnetic field distribution model is used to characterize the interaction information of the cable magnetic fields of the parallel cables and the strength distribution information of the local magnetic fields of the parallel cables.

8. The system according to claim 7, characterized in that The control device also includes a trend prediction component; The trend prediction component is used to predict the magnetic field distribution information of the parallel cables under different working conditions according to the magnetic field distribution model, and to perform unbalance trend prediction on the parallel cables based on the magnetic field distribution information to obtain the current unbalance trend prediction results of the parallel cables under corresponding working conditions.

9. The system according to any one of claims 1 to 5, characterized in that: The control device also includes a remote control component; The remote control component is used to generate a monitoring page of the parallel cable, and send the monitoring page to a remote terminal for display, wherein the monitoring page is used to display the operating status information of the parallel cable and the operating information of the excitation device; In response to the excitation device adjustment instruction triggered on the monitoring page, an adjustment operation control parameter is obtained, and the operation of the excitation device is controlled according to the adjustment operation control parameter.

10. A method for adjusting current imbalance of double-split parallel cables based on magnetic balance, characterized in that: The method comprises: Obtaining current data and magnetic field data of each cable in the parallel cables; Determine the current imbalance and magnetic field imbalance of the parallel cables based on the current data and the magnetic field data; When it is determined that the parallel cables meet the adjustment conditions based on the current imbalance and the magnetic field imbalance, an auxiliary magnetic field is constructed for the parallel cables until the parallel cables meet the current balance conditions; the auxiliary magnetic field is used to eliminate the magnetic field effect generated by the current imbalance of the parallel cables.

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