Cable sheath circulation compensation method and device, computer equipment, readable storage medium and program product

Abstract

The invention relates to a cable sheath circulation compensation method and device, computer equipment, a computer readable storage medium and a computer program product. The method comprises the following steps: acquiring cable information of a cable protected by a cable sheath and current information on the cable sheath; under the condition that the information deviation between the current information and the current setting information meets a deviation condition, performing compensation analysis on the cable sheath based on the information deviation and the cable information, and determining compensation reactance information of the cable sheath; determining a target compensation device matched with the compensation reactance information from the plurality of candidate compensation devices; and performing circulating current compensation on the cable sheath by using the target compensation device. By adopting the method, the accuracy of circulating current compensation can be improved.

Description

Technical Field

[0001] The present application relates to the field of electric power technology, and in particular to a cable sheath circulating current compensation method, device, computer equipment, computer-readable storage medium and computer program product. Background Art

[0002] With the development of power technology, cable systems have emerged as a medium for signal transmission. In power systems, cable systems transmit electrical energy; in communication systems, cable systems transmit information such as voice, images, and data. However, in large-scale cable systems, especially high-voltage cable systems, cable sheath circulation is a common problem. Sheath circulation can lead to increased heating of the cable system, energy loss, and shortened cable life.

[0003] In traditional technology, in order to reduce the sheath circulating current, grounding methods or sheath short-circuiting technologies are often used to reduce the sheath circulating current, but the effects of these methods are limited. With the modernization and complexity of cable systems, the compensation for circulating current only through grounding or sheath short-circuiting technology has the problem of inaccurate compensation. Summary of the invention

[0004] Based on this, it is necessary to provide a cable sheath circulating current compensation method, device, computer equipment, computer readable storage medium and computer program product that can improve the compensation accuracy in response to the above technical problems.

[0005] In a first aspect, the present application provides a cable sheath circulating current compensation method, comprising:

[0006] Acquire cable information of a cable protected by a cable sheath and current information on the cable sheath;

[0007] When the information deviation between the current information and the current setting information satisfies the deviation condition, performing compensation analysis on the cable sheath based on the information deviation and the cable information to determine the compensation reactance information of the cable sheath;

[0008] Determining a target compensation device matching the compensation reactance information from a plurality of candidate compensation devices;

[0009] The target compensation device is used to perform circulating current compensation on the cable sheath.

[0010] In one embodiment, the use of the target compensation device to perform circulating current compensation on the cable sheath includes:

[0011] Determining a compensation switch connected in parallel with the target compensation device from a plurality of candidate switches;

[0012] The compensation switch is opened to use the target compensation device to perform circulating current compensation on the cable sheath.

[0013] In one embodiment, the method further comprises:

[0014] In the case of abnormality in circulating current compensation, determining a target switch connected in series with the circulating current compensation component from the target compensation device;

[0015] The target switch is turned off to control the circulating current compensation component to stop performing circulating current compensation on the cable sheath.

[0016] In one embodiment, the method further comprises:

[0017] Obtaining updated current information on the cable sheath after circulating current compensation;

[0018] When the updated information deviation between the updated current information and the current setting information satisfies the deviation condition, performing compensation analysis on the cable sheath based on the updated information deviation and the cable information to determine updated reactance information of the cable sheath;

[0019] A new target compensation device matching the updated reactance information is determined from a plurality of candidate compensation devices, and the new target compensation device is used to perform circulating current compensation on the cable sheath.

[0020] In one embodiment, the compensation reactance information includes a compensation reactance value; and the method further includes:

[0021] Determining a numerical relationship between the compensation reactance value and a total number of device compensation values ​​represented by the plurality of candidate compensation devices;

[0022] When the numerical relationship is a negative value, a compensation warning signal is fed back.

[0023] In a second aspect, the present application also provides a cable sheath circulating current compensation system, the system comprising: a control device, a power supply device, and a plurality of candidate compensation devices;

[0024] The control device is used to implement the method described in any one of the above embodiments;

[0025] The candidate compensation device is used to perform circulating current compensation on the cable sheath when it is determined to be a target compensation device;

[0026] The power supply device is connected to the control device and the target compensation device, and is used to supply power to the control device and the target compensation device.

[0027] In a third aspect, the present application also provides a cable sheath circulating current compensation device, comprising:

[0028] A current information acquisition module, used to acquire cable information of the cable protected by the cable sheath and current information on the cable sheath;

[0029] A compensation analysis module, configured to, when an information deviation between the current information and the current setting information satisfies a deviation condition, perform compensation analysis on the cable sheath based on the information deviation and the cable information to determine the compensation reactance information of the cable sheath;

[0030] A target compensation device determination module, used to determine a target compensation device matching the compensation reactance information from a plurality of candidate compensation devices;

[0031] A circulating current compensation module is used to perform circulating current compensation on the cable sheath using the target compensation device.

[0032] In a fourth aspect, the present application further provides a computer device, wherein the computer device comprises a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the above method are implemented.

[0033] In a fifth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, and the computer program implements the steps of the above method when executed by a processor.

[0034] In a sixth aspect, the present application further provides a computer program product, wherein the computer program product comprises a computer program, and when the computer program is executed by a processor, the steps of the above method are implemented.

[0035] The cable sheath circulating current compensation method, device, computer equipment, computer readable storage medium and computer program product mentioned above obtain the cable information of the cable protected by the cable sheath and the current information on the cable sheath, and can determine the specific situation of the cable protected by the cable sheath and the circulating current situation of the cable sheath at the current moment. If the information deviation between the current information and the current setting information meets the deviation condition, it indicates that the sheath circulating current on the cable sheath needs to be compensated for. Therefore, it is necessary to perform compensation analysis on the cable sheath based on the information deviation and the cable information, determine the compensation reactance information of the cable sheath, and determine the target compensation device that matches the compensation reactance information from multiple candidate compensation devices, and use the target compensation device to perform circulating current compensation on the cable sheath. The above method is used to perform cable sheath circulating current compensation, and circulating current compensation can be performed in a targeted manner according to the real-time circulating current situation of the cable sheath, thereby improving the accuracy of cable sheath circulating current compensation. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A diagram showing an application environment of a cable sheath circulating current compensation method in one embodiment;

[0038] Figure 2 A schematic diagram of a flow chart of a cable sheath circulating current compensation method in one embodiment;

[0039] Figure 3 A schematic diagram of the structure of a cable sheath circulating current compensation system in one embodiment;

[0040] Figure 4 A schematic diagram of a flow chart of a cable sheath circulating current compensation method in another embodiment;

[0041] Figure 5 is a structural block diagram of a cable sheath circulating current compensation device in one embodiment;

[0042] Figure 6 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0043] 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.

[0044] The cable sheath circulating current compensation method provided in the embodiment of the present application can be applied to Figure 1In the application environment shown. Among them, the control device 102 communicates with the information collection device 104 and multiple candidate compensation devices 106 through the network. Among them, the control device 102 controls the controlled object by receiving, processing and executing control instructions to achieve the expected operating state and goal. It is the "brain" used to "command" and "manage" the operation of the machine or system. The information collection device 104 is a device that can automatically or manually collect information from various data sources (such as sensors, keyboard input, scanning equipment, etc.), and perform preliminary processing (such as screening, format conversion, etc.) and transmit (such as by wired or wireless means) to other devices or systems for further analysis and processing. In this embodiment, the information collection device 104 can be used to collect cable information of the cable protected by the cable sheath and current information on the cable sheath. The candidate compensation device 106 refers to a compensation device waiting to be selected, and the compensation device refers to a device used to perform circulating current compensation on the cable sheath, for example, it can be an inductor component, a capacitor component, etc. Specifically, during the process of performing cable sheath circulating current compensation, the control device 102 obtains cable information of the cable protected by the cable sheath and current information on the cable sheath from the information acquisition device 104; when the information deviation between the current information and the current setting information satisfies the deviation condition, the cable sheath is compensated and analyzed based on the information deviation and the cable information to determine the compensation reactance information of the cable sheath; from multiple candidate compensation devices 106, a target compensation device that matches the compensation reactance information is determined; and the target compensation device is used to perform circulating current compensation on the cable sheath.

[0045] In an exemplary embodiment, Figure 2 As shown, a cable sheath circulating current compensation method is provided, and the method is applied to Figure 1 The control device 102 in FIG. 1 is taken as an example to illustrate the method, which includes the following steps S202 to S208. Among them:

[0046] Step S202, obtaining cable information of the cable protected by the cable sheath and current information on the cable sheath.

[0047] Among them, the cable sheath circulating current is induced by the external magnetic field, system imbalance or current flowing in the cable. The cable sheath, also known as the outer sheath or sheath, is the outermost protective layer of the cable or wire. It mainly protects the internal structure of the cable from external factors such as heat, cold, moisture, chemical and mechanical effects. Current information refers to information such as the current amplitude and phase angle difference of the current flowing on the cable sheath. The cable information of the cable protected by the cable sheath includes the length, temperature, inductance and capacitance characteristics, load conditions, etc. of the cable.

[0048] Specifically, in order to perform circulating current compensation on the cable sheath, the control device can obtain the cable information of the cable protected by the cable sheath and the current information on the cable sheath to determine the circulating current situation on the cable sheath at the current moment and the specific situation of the cable protected by the cable sheath. Exemplarily, the action of obtaining the cable information of the cable protected by the cable sheath and the current information on the cable sheath can be active acquisition or passive reception.

[0049] Step S204: when the information deviation between the current information and the current setting information satisfies the deviation condition, a compensation analysis is performed on the cable sheath based on the information deviation and the cable information to determine the compensation reactance information of the cable sheath.

[0050] Among them, the deviation condition refers to the condition satisfied by the information deviation. In this embodiment, the deviation condition refers to the information deviation between the current information and the current setting information exceeding the preset deviation threshold, that is, if the information deviation between the current information and the current setting information satisfies the deviation condition, it indicates that the cable sheath needs to be compensated for circulating current. It can be understood that if the information deviation between the current information and the current setting information does not meet the deviation condition, the cable sheath does not need to be compensated for circulating current. Compensated reactance information refers to the reactance information required to be compensated for the cable sheath. For example, the compensated reactance information may include the compensated reactance value and the compensated reactance state.

[0051] Specifically, after obtaining the cable information of the cable protected by the cable sheath and the current information on the cable sheath, the control device can judge the information deviation between the current information and the current setting information. If the information deviation between the current information and the current setting information does not meet the deviation condition, there is no need to perform circulating current compensation on the cable sheath; if the information deviation between the current information and the current setting information meets the deviation condition, it indicates that circulating current compensation is required for the cable sheath. In this case, the control device needs to perform compensation analysis on the cable sheath based on the information deviation and the cable information, and determine the compensating reactance information of the cable sheath.

[0052] Step S206: determining a target compensation device that matches the compensation reactance information from a plurality of candidate compensation devices.

[0053] The candidate compensation device refers to a compensation device waiting to be selected, for example, the candidate compensation device may include an inductor component and a capacitor component.

[0054] Specifically, when determining the compensation reactance information of the cable sheath, it is necessary to obtain all candidate compensation devices in the cable sheath circulating current compensation process, and determine the target compensation device that matches the compensation reactance information from multiple candidate compensation devices. It can be understood that an association relationship between the candidate compensation device and the compensation reactance information can be established in advance, and after determining the compensation reactance information, the target compensation device that matches the compensation reactance information can be determined from multiple candidate compensation devices based on the association relationship.

[0055] Step S208: Use the target compensation device to perform circulating current compensation on the cable sheath.

[0056] Specifically, after determining the target compensation device that matches the compensation reactance information, the control device can use the target compensation device to perform circulating current compensation on the cable sheath.

[0057] In some specific embodiments, the control device can determine a compensation switch connected in parallel with the target compensation device from a plurality of candidate switches, disconnect the compensation switch, and use the target compensation device to perform circulating current compensation on the cable sheath. In other specific instances, the control device can also directly control the target compensation device to perform circulating current compensation on the cable sheath.

[0058] The above cable sheath circulating current compensation method obtains the cable information of the cable protected by the cable sheath and the current information on the cable sheath, and can determine the specific situation of the cable protected by the cable sheath and the circulating current situation of the cable sheath at the current moment. If the information deviation between the current information and the current setting information meets the deviation condition, it indicates that the sheath circulating current on the cable sheath needs to be compensated for. Therefore, it is necessary to perform compensation analysis on the cable sheath based on the information deviation and the cable information, determine the compensation reactance information of the cable sheath, and determine the target compensation device that matches the compensation reactance information from multiple candidate compensation devices, and use the target compensation device to perform circulating current compensation on the cable sheath. The above method can be used to perform cable sheath circulating current compensation, and targeted circulating current compensation can be performed according to the real-time circulating current situation of the cable sheath, thereby improving the accuracy of cable sheath circulating current compensation.

[0059] In an exemplary embodiment, using a target compensation device to perform circulating current compensation on a cable sheath includes: determining a compensation switch connected in parallel with the target compensation device from a plurality of candidate switches; and disconnecting the compensation switch to perform circulating current compensation on the cable sheath using the target compensation device.

[0060] The candidate switch refers to a switch waiting to be selected. Specifically, in this application, the candidate switch refers to all switches in the entire cable sheath circulating current compensation system. The compensation switch refers to a switch that can control the opening or stopping of circulating current compensation.

[0061] Specifically, after determining the target compensation device that matches the compensation reactance information, the control device may first determine a plurality of candidate switches included in the entire cable sheath circulating current compensation system, and determine the compensation switch connected in parallel with the target compensation device from the plurality of candidate switches, disconnect the compensation switch, and thereby use the target compensation device to perform circulating current compensation on the cable sheath. It can be understood that the compensation switch is connected in parallel with the target compensation device, that is, when the compensation switch is closed, the target compensation device is short-circuited, that is, the cable sheath will not be compensated for circulating current.

[0062] In this embodiment, based on the compensation switch connected in parallel with the target compensation device, the target compensation device can compensate for the circulating current of the cable sheath and can flexibly control the start and stop of the circulating current compensation process based on actual conditions, thereby improving the flexibility of the circulating current compensation.

[0063] In an exemplary embodiment, the method further includes: in the event of an abnormality in the circulating current compensation, determining a target switch in series with the circulating current compensation component from the target compensation device; disconnecting the target switch to control the circulating current compensation component to stop performing circulating current compensation on the cable sheath.

[0064] The target switch refers to a switch among the candidate switches that can control the circulating current compensation component to stop performing circulating current compensation on the cable sheath. The circulating current compensation component refers to a component that can perform circulating current compensation on the cable sheath, for example, the circulating current compensation component may include a capacitor component, an inductor component, and the like.

[0065] Specifically, if an abnormality occurs in the circulating current compensation process, the control device can determine a target switch connected in series with the circulating current compensation component from the target compensation device, and disconnect the target switch, thereby controlling the circulating current compensation component to stop performing circulating current compensation on the cable sheath. In a specific embodiment, Figure 3 As shown, the target switches are S2 and S3. By disconnecting S2 and S3, the circulating current compensation component can stop performing circulating current compensation on the cable sheath.

[0066] In this embodiment, in the event of an abnormality in the circulating current compensation, the stopping of the circulating current compensation of the cable sheath can be controlled by a target switch connected in series with the circulating current compensation component, thereby preventing the fault from expanding or damaging other devices.

[0067] In an exemplary embodiment, the method also includes: obtaining updated current information on the cable sheath after circulating current compensation; when the updated information deviation between the updated current information and the current setting information satisfies the deviation condition, performing compensation analysis on the cable sheath based on the updated information deviation and the cable information to determine the updated reactance information of the cable sheath; determining a new target compensation device that matches the updated reactance information from multiple candidate compensation devices, and using the new target compensation device to perform circulating current compensation on the cable sheath.

[0068] The updated current information refers to the current information after the circulating current compensation is performed on the cable sheath.

[0069] Specifically, the control device forms a closed-loop feedback with the external current monitoring system. After the control device uses the target compensation device to perform circulating current compensation on the cable sheath, it can obtain the updated current information on the cable sheath after the circulating current compensation, and re-judge the updated current information and the updated information deviation. If the updated information deviation between the updated current information and the current setting information meets the deviation condition, it indicates that the current circulating current compensation has not achieved the final effect. Therefore, it is necessary to perform compensation analysis on the cable sheath based on the updated information deviation and the cable information, determine the updated reactance information of the cable sheath, and determine a new target compensation device that matches the updated reactance information from multiple candidate compensation devices, and use the new target compensation device to perform circulating current compensation on the cable sheath. It can be understood that the above steps can be performed multiple times and repeatedly until the updated information deviation between the updated current information and the current setting information does not meet the deviation condition.

[0070] In this embodiment, the control device and the external current monitoring system form a closed-loop feedback, which can realize the process of repeated compensation and current detection until the updated information deviation between the updated current information and the current setting information does not meet the deviation condition, thereby ensuring the effect of circulating current compensation.

[0071] In an exemplary embodiment, the compensation reactance information includes a compensation reactance value. In the case of this embodiment, the cable sheath circulating current compensation method further includes: determining a numerical relationship between the compensation reactance value and a total number of device compensation values ​​represented by a plurality of candidate compensation devices; and when the numerical relationship is a negative value, feeding back a compensation warning signal.

[0072] The compensation warning signal refers to a warning signal fed back to the technical staff when the total number of device compensations represented by the candidate compensation device is insufficient to compensate the reactance value, so that the technical staff can handle it in time.

[0073] Specifically, the control device needs to determine the numerical relationship between the compensation reactance value and the total number of device compensations represented by multiple candidate compensation devices. If the numerical relationship is a negative value, it indicates that the total number of device compensations represented by the candidate compensation device is insufficient to compensate for the compensation reactance value. Therefore, the control device needs to feedback a compensation warning signal. It can be understood that if the numerical relationship is a positive value, it indicates that the total number of device compensations represented by the candidate compensation device is sufficient to compensate for the compensation reactance value. Therefore, the control device can determine the target compensation device that matches the compensation reactance information from multiple candidate compensation devices, and use the target compensation device to perform circulating current compensation on the cable sheath.

[0074] In this embodiment, the control device determines the numerical relationship between the compensation reactance value and the total compensation value of the device represented by multiple candidate compensation devices. When the numerical relationship is negative, a compensation warning signal is fed back to ensure the normal progress of the circulating current compensation process.

[0075] In an exemplary embodiment, a cable sheath circulating current compensation system is also provided, characterized in that the system includes: a control device, a power supply device, and multiple candidate compensation devices; the control device is used to implement the method in any one of the above embodiments; the candidate compensation device is used to perform circulating current compensation on the cable sheath when it is determined as a target compensation device; the power supply device is connected to the control device and the target compensation device, and is used to supply power to the control device and the target compensation device.

[0076] The power supply device is an efficient self-powered system to ensure the normal operation of the control device. Its energy supply scheme is based on the collaborative work of solar panels and high-capacity batteries, which can provide continuous and stable power support in the absence of external power. The power supply device uses solar panels as the main power source. The solar panel converts light energy into electrical energy, adjusts the output voltage through the DC-DC conversion circuit, and supplies it to the control device in the DCSCC device. Solar power supply has the advantages of environmental protection and high efficiency, and is particularly suitable for application scenarios in remote areas or where transmission lines are difficult to access the power grid. To ensure that the system can continue to work when there is insufficient light, the power supply device is also equipped with a large-capacity battery pack. The battery module stores excess energy when there is sufficient solar power, and automatically switches to battery power supply mode when the solar panel cannot supply power. The battery module has a long service life, and the battery charge and discharge control is realized through the intelligent power management system to ensure the continuous operation of the system under various conditions.

[0077] For example, an intelligent power management system is integrated into the power supply device to monitor the working status of the solar panels and batteries in real time. When there is sufficient sunlight, the system gives priority to using the solar panels to provide electricity, while storing the excess electricity in the battery; when there is insufficient sunlight or at night, the system automatically switches to battery power supply. The power management system can dynamically adjust the output power and voltage according to the actual load demand to ensure that the system can work stably under various operating conditions.

[0078] Specifically, in this embodiment, the control device can be used to implement the method implemented in any of the above embodiments, which will not be described in detail here. The candidate compensation device is used to perform circulating current compensation on the cable sheath when it is determined to be the target compensation device. The power supply device is connected to the control device and the target compensation device, and is used to supply power to the control device and the target compensation device.

[0079] The cable sheath circulating current compensation system can ensure the stability of the cable sheath circulating current compensation process through the coordinated action of the control device, the candidate compensation device, and the power supply device.

[0080] In a specific embodiment, a cable sheath circulating current suppression method is also provided, comprising:

[0081] This embodiment provides a DCSCC (Direct Current Suppression Control Circuit) device for suppressing cable sheath circulating current. The device effectively suppresses the sheath circulating current problem caused by induced current by real-time monitoring and dynamic compensation of the cable sheath grounding current. The DCSCC device can improve the operating efficiency of the cable transmission system, reduce energy loss, prevent cable overheating, and extend the service life of the equipment. It is particularly suitable for long-distance, high-voltage transmission cable systems.

[0082] In high-voltage cable transmission systems, cable sheath circulating current is a common problem. Since the induced current in the cable sheath will generate unnecessary energy loss, the temperature rise of the cable and its peripheral equipment will increase, which will lead to cable aging and reduced system efficiency. Traditional sheath circulating current suppression technologies mainly include single-end grounding, cross-ground wires or floating grounding. However, these methods have certain limitations in long-distance power transmission or complex cable networks, cannot provide dynamic real-time adjustment functions, and cannot cope with transient condition changes. Therefore, this embodiment proposes a dynamic compensation device based on DCSCC, which can respond to changes in the operating conditions of the cable system in real time, accurately adjust the phase angle and amplitude of the cable sheath current, and suppress the sheath circulating current, so as to achieve the purpose of improving the stability of the transmission system and reducing energy loss.

[0083] Working principle of DCSCC device:

[0084] The DCSCC device adopts a modular design, mainly including the main transformer, control device, power supply module, communication device, short-circuit switch and dynamic adjustment element. These modules work together to form an intelligent cable sheath current control system.

[0085] Main transformer:

[0086] The core of the DCSCC device is a single-turn main transformer, which is responsible for power conversion of cable sheath current. Unlike traditional transformers, the operating point of the main transformer in the DCSCC device automatically adjusts with changes in primary current and secondary load. This design allows the DCSCC device to still transmit power efficiently when the load changes, providing the required compensation impedance to suppress the induced current in the sheath. The main transformer changes the impedance characteristics of the cable sheath, ultimately achieving the purpose of reducing circulating current.

[0087] 2. Control system and dynamic adjustment:

[0088] The control system of DCSCC is divided into two parts: command signal receiving circuit and control device. The command signal receiving circuit obtains the real-time calculated compensation value from the cable sheath grounding current online monitoring system as the control signal input. The control device controls the operation of the DCSCC device according to these compensation values, especially adjusts the compensation impedance of each submodule to ensure that the phase and amplitude of the sheath grounding current reach the expected target.

[0089] When the cable transmission system is operating normally, the DCSCC device dynamically adjusts the state of the DCSCC submodule according to the grounding current amplitude and phase angle difference at the sheath end preset by the operator. By controlling the switching elements such as S2 and S3, the DCSCC device can change the compensation inductance and capacitance values, thereby realizing flexible adjustment of impedance, achieving the effect of balancing the current phase angle at the sheath end and suppressing the sheath circulation.

[0090] 3. Function of short-circuit switch S1:

[0091] The short-circuit switch S1 is used to control the commissioning and exiting of the DCSCC module. When the short-circuit switch S1 is closed, the DCSCC device is completely withdrawn from the cable sheath system. At this time, the leakage reactance effect of the transformer is ignored, and the sheath circulating current is no longer compensated. When S1 is disconnected, the DCSCC module is put back into operation and enters the compensation state. This commissioning and exiting mechanism enables the DCSCC device to respond flexibly according to the needs of the transmission system and ensure that the cable system operates under optimal conditions.

[0092] 4. Dynamic adjustment of compensation circuit:

[0093] The DCSCC device changes the size of the compensation reactance by adjusting the state of switches S2 and S3, thereby flexibly adjusting the impedance on the cable sheath. The control device communicates with the monitoring system in real time and adjusts the value of the compensation impedance according to the actual measured sheath current. By dynamically adjusting the compensation capacitor and inductor values, the DCSCC device can accurately control the sheath current during cable operation and reduce the sheath circulating current caused by the induced current.

[0094] 5. Communication device and fault protection:

[0095] The communication device is a crucial component of the DCSCC device. It is responsible for exchanging information with the external cable sheath monitoring system in real time. The monitoring system calculates the actual compensation value of the sheath grounding current and transmits it to the DCSCC controller through the communication device. The controller adjusts the compensation strategy accordingly.

[0096] When a cable system fails, the DCSCC device can quickly respond to the fault signal. After the monitoring system issues a fault command, the DCSCC controller performs a locking operation, closes the S2 and S3 switches and locks the compensation circuit to prevent the submodule from being damaged by overcurrent or overvoltage. After the fault is eliminated, the DCSCC device automatically resumes normal operation, thereby ensuring the continued reliability of the cable transmission system.

[0097] Detailed description of the power supply unit:

[0098] The power supply of the DCSCC device is designed as an efficient self-powered system to ensure the normal operation of the control device and communication device. Its energy supply solution is based on the coordinated work of solar panels and high-capacity batteries, which can provide continuous and stable power support in the absence of external power supply.

[0099] 1. Solar panel power supply:

[0100] The power supply device of the DCSCC device uses solar panels as the main power supply source. The solar panel converts light energy into electrical energy, adjusts the output voltage through the DC-DC conversion circuit, and supplies the control device and communication device in the DCSCC device. Solar power supply has the advantages of environmental protection and high efficiency, and is particularly suitable for application scenarios in remote areas or where transmission lines are difficult to access the power grid.

[0101] 2.Battery module:

[0102] To ensure that the system can continue to work when there is insufficient sunlight, the power supply unit is also equipped with a large-capacity battery pack. The battery module stores excess energy when there is sufficient solar power, and automatically switches to battery power mode when the solar panel cannot supply power. The battery module has a long service life and controls the battery charge and discharge through an intelligent power management system to ensure the continuous operation of the system under various conditions.

[0103] 3. Power supply management and energy optimization:

[0104] The power supply device integrates an intelligent power management system to monitor the working status of the solar panels and batteries in real time. When there is sufficient sunlight, the system gives priority to using solar panels to provide electricity, while storing excess electricity in the battery; when there is insufficient sunlight or at night, the system automatically switches to battery power supply. The power management system can dynamically adjust the output power and voltage according to the actual load requirements of the DCSCC to ensure that the system can work stably under various operating conditions.

[0105] Dynamic compensation technology: The DCSCC device has real-time adjustment capability. By monitoring the changes in the sheath grounding current and circulating current, it dynamically adjusts the compensation reactance and capacitance to achieve the preset balance target for the phase angle and amplitude of the sheath current.

[0106] Modular design: The device adopts a modular structure, which allows the number of sub-modules to be flexibly increased or decreased according to the system scale or specific needs. It is suitable for various complex transmission systems and supports future expansion and upgrades.

[0107] Closed-loop feedback control: The device uses closed-loop feedback control and combines the real-time data of the cable sheath current online monitoring system to continuously optimize the compensation strategy to ensure stable and reliable operation of the cable system.

[0108] Fault protection mechanism: When a fault occurs in the cable system, the DCSCC device can quickly respond to the fault signal, avoid damage to the submodule through the locking protection function, and automatically resume operation after the fault is eliminated, thereby improving the reliability and safety of the system.

[0109] Environmentally friendly and energy-saving design: The power supply device uses solar panels and batteries to provide energy, reducing dependence on external power sources and ensuring the continuous operation of the system without power supply. This green energy power supply solution is particularly suitable for special application scenarios such as remote areas, submarine cables and high-voltage transmission lines.

[0110] DCSCC devices are widely applicable to various high-voltage transmission cable systems, especially in long-distance transmission, underground cables, submarine cables and complex transmission networks, where they have significant application advantages.

[0111] Specific operation method:

[0112] 1. Overall structure and function of the system:

[0113] The cable sheath current compensation device (DCSCC) is a dynamic compensation device designed to solve the circulating current problem caused by sheath current in cable transmission systems. Its main purpose is to reduce and compensate for the imbalance and phase difference of the grounding current at the end of the sheath in long-distance transmission cables by adjusting the impedance of the cable sheath, thereby reducing power consumption and local heating in the system and improving the safety and stability of the cable system. The system mainly consists of the following parts:

[0114] Main transformer: The main transformer in the DCSCC device is its core power conversion component and adopts a single-turn transformer structure. The primary winding of the transformer is connected to the cable sheath to sense the sheath current, and the secondary side is connected to the compensation circuit. The operating point of the main transformer is dynamically adjusted as the sheath current and compensation load change, ensuring that the device can provide effective compensation current under different working conditions. Unlike traditional fixed operating point transformers, DCSCC transformers can adapt to real-time changes in the transmission system and dynamically respond to compensation needs.

[0115] Compensation circuit: The compensation circuit is mainly composed of inductor L, capacitor C and switches S1, S2, S3 and other components, which are used to adjust the compensation reactance. Inductor L is mainly responsible for providing reactance and adjusting the current phase, while capacitor C is used to stabilize the circuit and filter, eliminate unnecessary high-frequency components, and ensure the purity and stability of the compensation current. By dynamically adjusting the on and off states of switches S2 and S3, the control device can flexibly adjust the equivalent impedance of the compensation circuit to achieve the purpose of accurately controlling the compensation current.

[0116] Short-circuit switch S1: Short-circuit switch S1 is one of the key control components of the DCSCC device. Its main function is to control the device to be put into operation or withdrawn from operation. When S1 is in the closed state, the DCSCC device is completely out of operation, and the compensation circuit does not participate in the regulation of the cable sheath current; when S1 is disconnected, the device starts and enters the working state. The short-circuit switch design needs to meet the requirements of fast response, and usually uses high-reliability, low-loss electronic switches or mechanical switches to ensure fast switching while reducing the power loss of the system.

[0117] Control device: The control device of DCSCC is the "brain" of the whole system. It is responsible for receiving the real-time data of sheath current from the monitoring system and calculating the required compensation impedance according to the compensation requirements. The control device dynamically changes the impedance value in the compensation circuit by adjusting the state of switches S2 and S3 to achieve accurate compensation of sheath current. The control device is also responsible for coordinating the operation of multiple DCSCC submodules to ensure the synchronization and efficiency of the whole system.

[0118] Communication device: The communication device is used to exchange data with the cable sheath grounding current online monitoring system. The monitoring system is responsible for real-time collection of sheath current data, including key parameters such as amplitude and phase angle. After receiving this data, the communication device transmits it to the control device for compensation decision-making. At the same time, the communication device is also responsible for the coordination and communication between the DCSCC sub-modules to ensure that multiple sub-modules can work together under complex operating conditions.

[0119] Power supply device: The power supply of the DCSCC device is provided by solar panels and battery modules. The solar panels power the entire control device during the day, while the battery modules serve as a backup power source when there is insufficient light or at night. The design of the power supply module requires that it can work stably outdoors or in harsh environments for a long time, and has the characteristics of wind resistance and corrosion resistance. The energy management system (EMS) of the power supply module also automatically monitors the battery power and solar power supply to ensure the continuous and stable operation of the system.

[0120] 2. Working principle of DCSCC device:

[0121] The core working principle of the DCSCC device is to adjust the impedance of the cable sheath loop, control the grounding current at the end of the sheath, and make corresponding compensation. Its basic working process is as follows:

[0122] 2.1 Current data collection and transmission:

[0123] The cable sheath grounding current online monitoring system is responsible for real-time monitoring of the sheath end grounding current amplitude, phase angle and change trend. These data are transmitted to the DCSCC control device through the communication device. After receiving the data, the control device begins to analyze the current sheath current and calculates the system compensation requirements in combination with historical operation data.

[0124] 2.2 Compensation reactance calculation:

[0125] The control device calculates the reactance value that needs to be compensated through real-time data and preset target values ​​(such as ground current amplitude limit and phase angle difference target). This calculation involves a variety of system parameters, including cable length, temperature, inductance and capacitance characteristics, load conditions, etc. The calculated compensation reactance will be used to guide the adjustment of the next compensation circuit.

[0126] 2.3 Switch control and impedance adjustment:

[0127] The control device adjusts the opening and closing states of S2 and S3 according to the calculated compensation reactance value. By controlling the combination of inductance L and capacitance C, the equivalent impedance of the compensation circuit is adjusted to achieve compensation control of the sheath current. The rapid opening and closing of S2 and S3 can dynamically adjust the size of the compensation reactance, so that the system can adapt to the rapid changes of the sheath current and provide efficient real-time compensation.

[0128] 2.4 Modules work together:

[0129] If the compensation capacity of a single DCSCC submodule is insufficient, the system can dispatch multiple submodules to work together through the communication device. The cooperation between multiple submodules can greatly improve the compensation capacity of the entire system and ensure that the ideal compensation effect can be achieved in a complex operating environment. This collaborative working mechanism ensures the flexibility and reliability of the system. Even if some submodules fail or are overloaded, other submodules can take over to ensure the normal operation of the system.

[0130] 3. Detailed process of control strategy:

[0131] The control strategy of the DCSCC device includes multiple steps to ensure that it can maintain efficient and stable operation under various complex working conditions. The specific process is as follows:

[0132] Step 1: Data collection and preliminary processing:

[0133] The cable sheath grounding current online monitoring system collects the sheath current amplitude, phase angle and other data every second and transmits these data to the control device. The control device performs preliminary processing on the received data, calculates the maximum and minimum value ratio of the current, and determines whether the current sheath current exceeds the preset safety range.

[0134] Step 2: Determination of compensation needs:

[0135] The control device compares the current sheath current data with the set target value to determine whether compensation is required. If the current deviation is within the preset allowable range, the system maintains the current state and does not perform compensation; if the deviation exceeds the threshold, the system enters the compensation process.

[0136] Step 3: Compensation reactance calculation and submodule allocation:

[0137] The control device calculates the required compensation reactance value based on the current current deviation. The calculation result determines how many DCSCC submodules will participate in the compensation task. If the required compensation reactance is less than the remaining available submodule reactance, the control device will put the corresponding number of submodules into operation; if the required reactance is greater than the available reactance, the system will put all the remaining submodules into operation and display an "insufficient compensation" alarm.

[0138] Step 4: Real-time adjustment and feedback:

[0139] The control device continuously monitors the compensation effect through the feedback mechanism. If the compensation effect is not ideal (such as the phase angle difference of the sheath current still does not reach the preset target), the system will make secondary adjustments based on the new real-time data to ensure the compensation accuracy. Through multiple feedback adjustments, the system can achieve balance and stability of the cable sheath current in a short time.

[0140] 4. Fault protection mechanism:

[0141] In order to ensure the long-term reliable operation of the system, the DCSCC device integrates a variety of fault protection mechanisms. Mainly including:

[0142] 4.1 Automatic locking mechanism:

[0143] When the system detects an abnormal situation (such as excessive current or overheating at the end of the sheath), the control device will immediately issue a locking command to close the short-circuit switch S1 and the compensation switches S2 and S3, and stop the operation of the compensation circuit to avoid the expansion of the fault or damage to other sub-modules.

[0144] 4.2 Self-diagnosis and alarm function:

[0145] The DCSCC device has a self-diagnosis function and can monitor the operating status of the submodules (such as voltage, current, temperature, etc.) in real time. Once an abnormal operating condition is detected, the system will automatically alarm and record the fault information for maintenance personnel to refer to. The alarm information can be remotely sent to the monitoring center through the communication device, which is convenient for operators to handle in time.

[0146] 4.3 Redundancy design and fault recovery:

[0147] The DCSCC system adopts a redundant design, and multiple submodules can back up each other. When a submodule fails, the system will automatically isolate it and enable the backup submodule to continue working. The redundant design ensures that the system can maintain normal compensation functions even when a local failure occurs, thereby ensuring the safe operation of the cable transmission system.

[0148] 5. Experimental verification and application prospects:

[0149] Through a large number of tests on the DCSCC device under laboratory conditions, the corresponding relationship between the equivalent impedance generated by transformer coupling on the coaxial cable and the transformer load size was verified. The experimental results show that the DCSCC device can work stably under various working conditions, effectively compensate for the cable sheath current, and has good dynamic response capabilities. As the transmission cable system develops towards larger capacity and longer distances, the application prospects of the DCSCC device are broad and it is expected to become one of the key technologies in the future cable transmission system.

[0150] In a specific embodiment, Figure 4 As shown, a cable sheath circulating current compensation method is also provided, comprising:

[0151] Step S401, obtaining cable information of a cable protected by a cable sheath and current information on the cable sheath;

[0152] Step S402, when the information deviation between the current information and the current setting information meets the deviation condition, a compensation analysis is performed on the cable sheath based on the information deviation and the cable information to determine the compensation reactance information of the cable sheath;

[0153] Wherein, the compensation reactance information includes a compensation reactance value;

[0154] Step S403, determining a numerical relationship between a compensation reactance value and a total number of device compensation values ​​represented by a plurality of candidate compensation devices;

[0155] Step S404, when the numerical relationship is a negative value, a compensation warning signal is fed back;

[0156] Step S405, when the numerical relationship is a positive value, determining a target compensation device that matches the compensation reactance information from a plurality of candidate compensation devices;

[0157] Step S406, determining a compensation switch connected in parallel with the target compensation device from among the multiple candidate switches, disconnecting the compensation switch, and using the target compensation device to perform circulating current compensation on the cable sheath;

[0158] Step S407, obtaining updated current information on the cable sheath after circulating current compensation;

[0159] Step S408, when the updated information deviation between the updated current information and the current setting information satisfies the deviation condition, a compensation analysis is performed on the cable sheath based on the updated information deviation and the cable information to determine the updated reactance information of the cable sheath;

[0160] Step S409, determining a new target compensation device that matches the updated reactance information from multiple candidate compensation devices, and using the new target compensation device to perform circulating current compensation on the cable sheath;

[0161] Step S410, when an abnormality occurs in the circulating current compensation, a target switch connected in series with the circulating current compensation component is determined from the target compensation device, and the target switch is disconnected to control the circulating current compensation component to stop performing circulating current compensation on the cable sheath.

[0162] 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.

[0163] Based on the same inventive concept, the embodiment of the present application also provides a cable sheath circulating current compensation device for implementing the cable sheath circulating current compensation method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more cable sheath circulating current compensation device embodiments provided below can refer to the limitations of the cable sheath circulating current compensation method above, and will not be repeated here.

[0164] In an exemplary embodiment, Figure 5As shown, a cable sheath circulating current compensation device 500 is provided, comprising: a current information acquisition module 502, a compensation analysis module 504, a target compensation device determination module 506 and a circulating current compensation module 508, wherein:

[0165] A current information acquisition module 502 is used to acquire cable information of the cable protected by the cable sheath and current information on the cable sheath;

[0166] A compensation analysis module 504, configured to perform compensation analysis on the cable sheath based on the information deviation and the cable information to determine the compensation reactance information of the cable sheath when the information deviation between the current information and the current setting information meets the deviation condition;

[0167] A target compensation device determination module 506 is used to determine a target compensation device that matches the compensation reactance information from a plurality of candidate compensation devices;

[0168] The circulating current compensation module 508 is used to perform circulating current compensation on the cable sheath using a target compensation device.

[0169] In an exemplary embodiment, the circulating current compensation module 508 is specifically configured to:

[0170] Determining a compensation switch connected in parallel with a target compensation device from among a plurality of candidate switches;

[0171] Open the compensation switch to compensate for the circulating current on the cable sheath using the target compensation device.

[0172] In an exemplary embodiment, the cable sheath circulating current compensation device 500 further includes a target switch determination module, which is specifically used to:

[0173] In case of abnormality in circulating current compensation, a target switch connected in series with the circulating current compensation component is determined from the target compensation device;

[0174] The target switch is turned off to control the circulating current compensation component to stop performing circulating current compensation on the cable sheath.

[0175] In an exemplary embodiment, the cable sheath circulating current compensation device 500 further includes an information updating module, which is specifically used to:

[0176] Get updated current information on the cable sheath after circulating current compensation;

[0177] When the updated information deviation between the updated current information and the current setting information satisfies the deviation condition, a compensation analysis is performed on the cable sheath based on the updated information deviation and the cable information to determine the updated reactance information of the cable sheath;

[0178] A new target compensation device matching the updated reactance information is determined from a plurality of candidate compensation devices, and the new target compensation device is used to perform circulating current compensation on the cable sheath.

[0179] In an exemplary embodiment, the compensation reactance information includes a compensation reactance value. In the case of this embodiment, the cable sheath circulating current compensation device 500 also includes a compensation early warning module, which is specifically used to:

[0180] determining a numerical relationship between a compensating reactance value and a total number of device compensation values ​​represented by a plurality of candidate compensation devices;

[0181] In case the numerical relationship is negative, a compensation warning signal is fed back.

[0182] Each module in the cable sheath circulating current compensation device can be implemented in whole or in part by software, hardware and a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute the operations corresponding to each module.

[0183] In an exemplary embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as shown in FIG. Figure 6 As shown. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. 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 and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be realized through WIFI, a mobile cellular network, near field communication (NFC) or other technologies. When the computer program is executed by the processor, a cable sheath circulating current compensation method is realized. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device shell, or an external keyboard, touchpad or mouse.

[0184] Those skilled in the art will understand that Figure 6 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.

[0185] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps of the above method when executing the computer program.

[0186] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above method are implemented.

[0187] In one embodiment, a computer program product is provided, comprising a computer program, which implements the steps of the above method when executed by a processor.

[0188] 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, and the collection, use and processing of relevant data must comply with relevant regulations.

[0189] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method 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 the present application can include at least one of non-volatile memory 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), magnetic 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, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0190] 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 application.

[0191] 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 cable sheath circulating current compensation method, characterized in that: Applied to a control device, the method comprises: Acquire cable information of a cable protected by a cable sheath and current information on the cable sheath; When the information deviation between the current information and the current setting information satisfies the deviation condition, performing compensation analysis on the cable sheath based on the information deviation and the cable information to determine the compensation reactance information of the cable sheath; Determining a target compensation device matching the compensation reactance information from a plurality of candidate compensation devices; The target compensation device is used to perform circulating current compensation on the cable sheath.

2. The method according to claim 1, characterized in that The method of using the target compensation device to perform circulating current compensation on the cable sheath comprises: Determining a compensation switch connected in parallel with the target compensation device from a plurality of candidate switches; The compensation switch is opened to use the target compensation device to perform circulating current compensation on the cable sheath.

3. The method according to claim 2, characterized in that The method further comprises: In the case of abnormality in circulating current compensation, determining a target switch connected in series with the circulating current compensation component from the target compensation device; The target switch is turned off to control the circulating current compensation component to stop performing circulating current compensation on the cable sheath.

4. The method according to claim 1, characterized in that: The method further comprises: Obtaining updated current information on the cable sheath after circulating current compensation; When the updated information deviation between the updated current information and the current setting information satisfies the deviation condition, performing compensation analysis on the cable sheath based on the updated information deviation and the cable information to determine updated reactance information of the cable sheath; A new target compensation device matching the updated reactance information is determined from a plurality of candidate compensation devices, and the new target compensation device is used to perform circulating current compensation on the cable sheath.

5. The method according to claim 1, characterized in that: The compensation reactance information includes a compensation reactance value; the method further includes: Determining a numerical relationship between the compensation reactance value and a total number of device compensation values ​​represented by the plurality of candidate compensation devices; When the numerical relationship is a negative value, a compensation warning signal is fed back.

6. A cable sheath circulating current compensation system, characterized in that: The system comprises: a control device, a power supply device, and a plurality of candidate compensation devices; The control device is used to implement the method as claimed in any one of claims 1 to 5; The candidate compensation device is used to perform circulating current compensation on the cable sheath when it is determined to be a target compensation device; The power supply device is connected to the control device and the target compensation device, and is used to supply power to the control device and the target compensation device.

7. A cable sheath circulating current compensation device, characterized in that: The device comprises: A current information acquisition module, used to acquire cable information of the cable protected by the cable sheath and current information on the cable sheath; A compensation analysis module, configured to, when an information deviation between the current information and the current setting information satisfies a deviation condition, perform compensation analysis on the cable sheath based on the information deviation and the cable information to determine the compensation reactance information of the cable sheath; A target compensation device determination module, used to determine a target compensation device matching the compensation reactance information from a plurality of candidate compensation devices; A circulating current compensation module is used to perform circulating current compensation on the cable sheath using the target compensation device.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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