Direct current parallel connection method of direct current system of transformer substation and related device

Abstract

The invention discloses a direct-current parallel connection method, a direct-current parallel connection device and direct-current parallel connection equipment of a direct-current system of a transformer substation, and a computer readable storage medium. The method comprises the following steps: determining corresponding parallel connection operation data based on a cable model and load data of a target feeder branch; performing parallel connection detection on the target feeder branch; when the parallel connection detection is passed, controlling a mechanical arm to perform piercing and parallel connection operation on the target feeder line branch based on the parallel connection operation data; when a new power supply access signal is received, parallel connection quit operation is executed, and insulation recovery processing is carried out on the piercing part of the target feeder line branch; when the insulation recovery processing is completed, performing surface insulation detection on the target feeder branch; and when the surface insulation detection is passed, sending a cable insulation message. Direct current branches are efficiently connected in parallel, power supply switching is safely carried out, safety problems are avoided, and technical improvement work of a direct current system of a transformer substation is ensured to be efficiently and safely carried out.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric power equipment, and more specifically, relates to a DC parallel connection method, a DC parallel connection device, a DC parallel connection equipment, and a computer-readable storage medium of a DC system of a transformer substation. Background Art

[0002] The DC system of a substation plays a vital role in power supply. The stability and reliability of its operation are directly related to the normal operation of the entire power system. With the increase of operating years, the DC system of a substation inevitably faces the need for technical transformation to adapt to the evolving power technology requirements and ensure the safety and stability of the system. However, as a non-stop power system, the technical transformation of the DC system must be completed under the power supply state.

[0003] In the related technologies, most substations are limited by the reserved positions during the early construction, and can only be renovated at the original positions, which makes it inevitable to complete the transfer of the old and new systems under power. The construction site lacks special live short-circuiting tools, and often can only rely on existing equipment for temporary short-circuiting. However, there are many disadvantages. First, due to the lack of special tools, the efficiency of on-site load transfer is low, which seriously affects the progress of technical transformation; second, during the transfer process, it is easy to cause DC grounding, short circuit or power failure due to improper operation or equipment mismatch, which will not only interfere with the normal operation of the substation, but also may cause equipment damage, power accidents and other serious consequences; third, under abnormal circumstances, such as accidental cable damage, due to the lack of effective repair means and standardized processes, the cable cannot be repaired in a timely and effective manner, leaving safety hazards, threatening the safe and stable operation of the entire DC system and even the power network.

[0004] Therefore, how to efficiently connect DC branches, safely switch power supplies, avoid safety problems, and ensure efficient and safe technical transformation of substation DC systems is a key issue that technical personnel in this field are concerned about. Summary of the invention

[0005] The purpose of the present application is to provide a DC parallel connection method, a DC parallel connection device, a DC parallel connection equipment, and a computer-readable storage medium for a DC system of a substation, so as to efficiently parallel the DC branches, safely switch the power supply, avoid safety problems, and ensure the efficient and safe technical transformation of the DC system of the substation.

[0006] In view of the above defects or improvement needs of the prior art, the present invention provides a DC parallel connection method of a DC system of a substation, comprising:

[0007] Determine corresponding parallel connection operation data based on the cable model and load data of the target feeder branch;

[0008] Performing parallel connection detection on the target feeder branch;

[0009] When the parallel connection detection is passed, the mechanical arm is controlled to perform a piercing and parallel connection operation on the target feeder branch based on the parallel connection operation data;

[0010] When a new power supply connection signal is received, a parallel connection exit operation is performed, and insulation restoration processing is performed on the pierced part of the target feeder branch;

[0011] When the insulation restoration process is completed, performing surface insulation detection on the target feeder branch;

[0012] When the surface insulation test passes, a cable insulation message is sent.

[0013] Optionally, also include:

[0014] During the piercing and splicing operation, the exposed and leaking part of the target feeder branch is insulated and protected.

[0015] Optionally, performing insulation restoration processing on the punctured portion of the target feeder branch includes:

[0016] The same material of the target feeder branch is used for melting treatment to obtain a repair liquid;

[0017] The repair fluid is replenished to the puncture site of the target feeder branch by a robotic arm.

[0018] Optionally, performing parallel connection detection on the target feeder branch includes:

[0019] Polarity detection and voltage difference detection are performed on the target feeder branch.

[0020] Optionally, also include:

[0021] When the insulation restoration process is completed, the target feeder branch is subjected to a flatness process by a robotic arm.

[0022] The present application also provides a DC parallel connection device for a DC system of a substation, comprising:

[0023] An operation data determination module, used to determine corresponding parallel connection operation data based on the cable model and load data of the target feeder branch;

[0024] A parallel connection detection module, used for performing parallel connection detection on the target feeder branch;

[0025] A piercing and connecting operation module, used for controlling the mechanical arm to perform a piercing and connecting operation on the target feeder branch based on the connecting operation data when the connecting detection passes;

[0026] An insulation recovery processing module, used for executing a parallel connection exit operation and performing insulation recovery processing on the pierced part of the target feeder branch when receiving a new power supply connection signal;

[0027] A surface insulation detection module, used for performing surface insulation detection on the target feeder branch when the insulation recovery process is completed;

[0028] The insulation message sending module is used to send the cable insulation message when the surface insulation detection passes.

[0029] Optionally, also include:

[0030] The insulation protection module is used to perform insulation protection on the exposed part of the target feeder branch during the piercing and connecting operation.

[0031] Optionally, also include:

[0032] The flatness processing module is used to perform flatness processing on the target feeder branch through a mechanical arm when the insulation recovery processing is completed.

[0033] The present application also provides a DC parallel connection device, comprising:

[0034] Memory for storing computer programs;

[0035] A processor is used to implement the steps of the DC dedicated parallel connection method as described above when executing the computer program.

[0036] The present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the DC dedicated parallel connection method as described above are implemented.

[0037] The present application provides a DC parallel connection method for a DC system of a substation, comprising: determining corresponding parallel connection operation data based on a cable model and load data of a target feeder branch; performing a parallel connection detection on the target feeder branch; when the parallel connection detection passes, controlling a mechanical arm to perform a piercing parallel connection operation on the target feeder branch based on the parallel connection operation data; when a new power supply access signal is received, executing a parallel connection exit operation, and performing insulation recovery processing on the pierced portion of the target feeder branch; when the insulation recovery processing is completed, performing a surface insulation detection on the target feeder branch; when the surface insulation detection passes, sending a cable insulation message.

[0038] It has the following beneficial effects:

[0039] By determining the parallel connection operation data based on the cable model and load data of the target feeder branch, precise adaptation is achieved, which greatly improves the reliability of the parallel connection operation, effectively avoids parallel connection failures and safety hazards caused by improper operation data, and ensures that feeder branches with different characteristics can successfully complete the parallel connection task.

[0040] In the parallel connection detection stage, strict polarity detection and voltage difference detection ensure the accuracy of the parallel connection conditions, and prevent serious problems such as DC grounding, short circuit or power failure caused by incorrect polarity or abnormal voltage difference in advance, greatly reduce the risk of equipment damage, and enhance the stability of system operation.

[0041] The robot arm performs the piercing and connecting operation, which not only improves the operation accuracy, but also effectively ensures the safety of personnel in the live environment, reduces manual operation errors, and improves work efficiency. The connection exit operation and insulation recovery processing after the new power supply is connected can timely eliminate redundant electrical connections, restore the insulation performance of the cable, prevent subsequent failures caused by insulation damage, and ensure the safe and stable operation of the system under the new power supply mode.

[0042] Surface insulation detection and message sending further strengthen the monitoring of cable status, allowing staff to grasp the situation in a timely manner and respond quickly, effectively ensuring the efficient and safe advancement of the technical transformation of the DC system of the entire substation and improving the reliability and continuity of power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0044] Figure 1 A flow chart of a DC parallel connection method for a DC system of a substation provided in an embodiment of the present application;

[0045] Figure 2 A schematic diagram of the structure of a DC parallel connection device for a DC system of a substation provided in an embodiment of the present application;

[0046] Figure 3 This is a schematic diagram of the structure of the DC parallel connection device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0047] The purpose of the present application is to provide a DC parallel connection method, a DC parallel connection device, a DC parallel connection equipment, and a computer-readable storage medium for a DC system of a substation, so as to efficiently parallel the DC branches, safely switch the power supply, avoid safety problems, and ensure the efficient and safe technical transformation of the DC system of the substation.

[0048] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention 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 invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0049] The following describes a DC parallel connection method for a DC system of a substation provided by the present application through an embodiment.

[0050] Please refer to Figure 1 , Figure 1 A flow chart of a DC parallel connection method for a DC system of a substation provided in an embodiment of the present application.

[0051] In this embodiment, the method may include:

[0052] S101, determining corresponding parallel connection operation data based on the cable model and load data of the target feeder branch;

[0053] In this step, feeder branches with different cable models and load data require different operating parameters when connected in parallel. For example, different cables have different insulation properties and conductivity, and can withstand different connection methods and currents. Determining the connection operation data based on these characteristics is to ensure that the connection process is safe, stable and efficient, so as to adapt to different actual situations.

[0054] In this step, firstly, it is necessary to collect comprehensive data of the target feeder branch in the DC system of the substation, including cable model (such as cable material, specification and other information) and load data (such as real-time current, power and other operating parameters). Then, the collected data is input into a pre-set algorithm or rule base, which stores the optimal parallel connection operation data corresponding to different cable models and load data combinations, and determines the parallel connection operation data suitable for the target feeder branch through data matching, such as the voltage and current parameters of the parallel connection, the operating force and angle of the robot arm, etc.

[0055] This method can improve the accuracy and safety of parallel connection, avoid parallel connection failure or safety accidents caused by ignoring the characteristics of different branches due to unified operation standards, ensure that each target feeder branch can be paralleled in the most suitable way, and improve the success rate and stability of the parallel connection work of the entire DC system.

[0056] S102, performing parallel connection detection on the target feeder branch;

[0057] Based on S101, the purpose of performing detection before the parallel connection operation in this step is to ensure that the parallel connection conditions meet the requirements, avoid faults such as DC grounding, short circuit or power failure caused by problems such as incorrect polarity or excessive voltage difference, and maintain the safety and effectiveness of the parallel connection process.

[0058] This step can be achieved by using professional testing equipment and circuit design. For polarity detection, the polarity of the target feeder branch can be determined by detecting the current direction or voltage polarity of the circuit; the voltage difference detection requires a high-precision voltage measuring instrument to measure the voltage difference between the two ends of the parallel connection to determine whether it is within the specified 5V. When the polarity is correct and the voltage difference is within 5V, the parallel connection test is determined to be passed, otherwise an alarm is issued and the parallel connection operation is blocked.

[0059] It can be seen that in this step, possible problems can be discovered in advance, and various faults caused by electrical parameter mismatch during the parallel connection process can be effectively prevented, thereby protecting the safety of the DC system and related equipment, reducing the power outage time and equipment damage risk caused by faults, and improving the reliability of system operation.

[0060] S103, when the parallel connection detection passes, the mechanical arm is controlled to perform a piercing and parallel connection operation on the target feeder branch based on the parallel connection operation data;

[0061] Based on S102, the robotic arm in this step can operate accurately in a live environment, perform piercing and connecting according to the predetermined connection operation data, and realize the connection between the old and new power supplies, while maintaining the accuracy and stability of the operation and avoiding the risks of manual operation in a live environment.

[0062] Furthermore, after the parallel connection test is passed, the confirmed parallel connection operation data is transmitted to the robot control system. The robot adjusts its own position, posture, movement force and other parameters according to these data, and then uses a specially designed piercing tool to accurately pierce the cable of the target feeder branch to establish an electrical connection between the new and old power supplies. During the operation, the movement of the robot is monitored and adjusted in real time by high-precision sensors and control systems to ensure the accuracy and safety of the operation.

[0063] It can be seen that this step can improve the accuracy and efficiency of the parallel connection operation and reduce the difficulty and risk of manual operation. Especially in an electrically charged environment, the use of a robotic arm can effectively avoid the risk of electric shock to personnel, ensure the smooth progress of the parallel connection work, and reduce power outages and equipment damage caused by operational errors.

[0064] S104, when a new power supply connection signal is received, a parallel connection exit operation is performed, and insulation restoration processing is performed on the pierced part of the target feeder branch;

[0065] Based on S103, after the new power supply is connected, the original parallel connection task is completed in this step. At this time, timely exiting the parallel connection state can avoid unnecessary electrical connections. At the same time, the insulation recovery treatment of the punctured part is to prevent the degradation of insulation performance caused by puncture from causing subsequent safety problems, thereby ensuring the insulation integrity of the cable.

[0066] Furthermore, when the new power supply access signal is detected, the control system sends a command to the robot arm to perform the parallel exit operation, that is, to disconnect the robot arm from the target feeder branch. For the insulation restoration process, firstly, an insulating material of the same material as the target feeder branch is used, which is heated to a molten state to obtain a repair liquid, and then the repair liquid is accurately added to the puncture site through the injection device carried by the robot arm to fill the gap caused by the puncture and restore the insulation structure of the cable.

[0067] It can be seen that this step keeps the DC system in normal operation after the new power supply is connected, avoiding electrical interference or failure caused by the failure to exit the parallel connection in time. The insulation recovery process effectively prevents DC grounding or short circuit problems that may be caused by damaged cable insulation, prolongs the service life of the cable, and improves the safety and stability of system operation.

[0068] S105, when the insulation restoration process is completed, performing surface insulation detection on the target feeder branch;

[0069] Based on S104, this step verifies the effect of the insulation restoration treatment by testing the surface insulation performance to ensure that the cables meet the operating requirements after splicing and repair, and to avoid safety hazards due to incomplete insulation restoration.

[0070] Furthermore, in this step, professional insulation testing equipment, such as an insulation resistance tester, can be used to conduct a comprehensive test on the surface of the target feeder branch. The detection electrode is brought into contact with the cable surface, a certain voltage is applied, the leakage current through the cable surface insulation layer is measured, and the insulation resistance value is calculated according to Ohm's law. This value is compared with the set standard insulation resistance value to determine whether the insulation recovery meets the requirements.

[0071] This step can promptly discover possible problems after insulation restoration, ensure that the cable insulation performance meets the operating standards, further reduce safety risks such as DC grounding and short circuit caused by insulation problems, ensure the stable operation of the DC system, and improve the reliability of power supply.

[0072] S106, when the surface insulation detection passes, a cable insulation message is sent.

[0073] Based on S105, this step verifies the effect of the insulation restoration treatment by testing the surface insulation performance to ensure that the cables meet the operating requirements after splicing and repair, and to avoid safety hazards due to incomplete insulation restoration.

[0074] In this step, you can use professional insulation testing equipment, such as an insulation resistance tester, to conduct a comprehensive test on the surface of the target feeder branch. Put the detection electrode in contact with the cable surface, apply a certain voltage, measure the leakage current through the cable surface insulation layer, and calculate the insulation resistance value according to Ohm's law. Compare this value with the set standard insulation resistance value to determine whether the insulation recovery meets the requirements.

[0075] In summary, this embodiment determines the parallel connection operation data based on the cable model and load data of the target feeder branch, realizes precise adaptation, greatly improves the reliability of the parallel connection operation, effectively avoids the parallel connection failure and safety hazards caused by improper operation data, and ensures that feeder branches with different characteristics can successfully complete the parallel connection task. In the parallel connection detection link, strict polarity detection and pressure difference detection ensure the accuracy of the parallel connection conditions, prevent serious problems such as DC grounding, short circuit or power failure caused by polarity errors or abnormal pressure differences in advance, greatly reduce the risk of equipment damage, and enhance the stability of system operation. The mechanical arm performs the piercing and parallel connection operation, which not only improves the operation accuracy, but also effectively ensures the safety of personnel in a live environment, reduces manual operation errors, and improves work efficiency. The parallel connection exit operation and insulation recovery processing after the new power supply is connected can promptly eliminate redundant electrical connections, restore the cable insulation performance, prevent subsequent failures caused by insulation damage, and ensure the safe and stable operation of the system under the new power supply mode. Surface insulation detection and message sending further strengthen the monitoring of cable status, allowing staff to grasp the situation in a timely manner and respond quickly, effectively ensuring the efficient and safe advancement of the technical transformation of the DC system of the entire substation and improving the reliability and continuity of power supply.

[0076] Optionally, also include:

[0077] During the piercing and splicing operation, the exposed and leaking parts of the target feeder branch are insulated and protected.

[0078] In this optional solution, during the piercing and splicing operation, the exposed part of the target feeder branch is easily affected by the outside world. Insulation protection can prevent it from electrical failure, ensuring operational safety and system stability.

[0079] Among them, when the robotic arm performs the piercing and connecting operation, the insulation protection device is started synchronously, such as using insulating sleeves, insulating coatings and other materials to cover or coat the exposed parts to isolate them from the external environment.

[0080] This optional solution can enhance the safety during the parallel connection operation, reduce the probability of short circuit, grounding and other faults caused by the exposed part contacting the outside world, and ensure the smooth progress of the parallel connection work.

[0081] Optionally, insulation restoration is performed on the punctured portion of the target feeder branch, including:

[0082] The same material of the target feeder branch is melted to obtain a repair liquid; the repair liquid is added to the punctured part of the target feeder branch by a robotic arm.

[0083] This optional solution uses the same material for melting to obtain a repair liquid, which can better integrate with the target feeder branch to ensure the insulation recovery effect.

[0084] Among them, the material sample of the target feeder branch is first obtained, the same material is heated to a melted state through a heating device to form a repair liquid, and then the repair liquid is accurately injected into the puncture site by a robotic arm.

[0085] This optional solution can improve the quality of insulation restoration, making the repaired area closer to the insulation performance of the original cable, and effectively preventing safety problems caused by reduced insulation performance.

[0086] Optionally, a parallel connection test is performed on the target feeder branch, including:

[0087] Perform polarity detection and voltage difference detection on the target feeder branch.

[0088] This optional solution uses polarity detection to ensure the correct current direction and voltage difference detection to keep the voltage stable during parallel connection. The two work together to ensure safe parallel connection.

[0089] Among them, the polarity can be determined by detecting the current direction through a dedicated polarity detection circuit, and the voltage difference between the two ends can be measured and connected with a high-precision voltage measuring instrument for comprehensive judgment.

[0090] This optional solution can eliminate potential safety hazards caused by polarity errors and excessive pressure differences in advance, ensure the safety of parallel connection operations, and improve system stability.

[0091] Optionally, also include:

[0092] When the insulation restoration process is completed, the target feeder branch is flattened by a robotic arm.

[0093] The flatness treatment in this optional solution can make the surface of the repaired cable smoother and reduce problems such as electric field distortion caused by surface unevenness.

[0094] Among them, after the insulation restoration process is completed, the robotic arm is replaced with a leveling tool to grind and smooth the surface of the target feeder branch.

[0095] This optional solution can optimize the cable surface condition, reduce the risk of partial discharge caused by surface unevenness, extend the cable service life, and improve the system operation reliability.

[0096] A DC parallel connection device for a DC system of a substation provided in an embodiment of the present application is introduced below. A DC parallel connection device for a DC system of a substation and a DC parallel connection method for a DC system of a substation described below can be referred to each other.

[0097] Please refer to Figure 2 , Figure 2 A schematic structural diagram of a DC parallel connection device for a DC system of a substation provided in an embodiment of the present application.

[0098] In this embodiment, the device may include:

[0099] An operation data determination module 100, for determining corresponding parallel connection operation data based on the cable model and load data of the target feeder branch;

[0100] A parallel connection detection module 200, used for performing parallel connection detection on a target feeder branch;

[0101] The piercing and connecting operation module 300 is used to control the mechanical arm to perform the piercing and connecting operation on the target feeder branch based on the connecting operation data when the connecting detection passes;

[0102] The insulation recovery processing module 400 is used to execute the parallel connection exit operation and perform insulation recovery processing on the pierced part of the target feeder branch when receiving the new power supply connection signal;

[0103] A surface insulation detection module 500 is used to perform surface insulation detection on the target feeder branch when the insulation recovery process is completed;

[0104] The insulation message sending module 600 is used to send a cable insulation message when the surface insulation detection passes.

[0105] Optionally, also include:

[0106] The insulation protection module is used to provide insulation protection for the exposed part of the target feeder branch during the piercing and splicing operation.

[0107] Optionally, also include:

[0108] The flatness processing module is used to perform flatness processing on the target feeder branch through a robotic arm when the insulation restoration processing is completed.

[0109] This application also provides DC parallel connection equipment, please refer to Figure 3 , Figure 3This is a schematic diagram of the structure of a DC parallel connection device provided in an embodiment of the present application. The DC parallel connection device may include:

[0110] Memory for storing computer programs;

[0111] The processor is used to implement the steps of any one of the above-mentioned methods for connecting a DC power substation DC system when executing a computer program.

[0112] like Figure 3 FIG. 1 is a schematic diagram of the structure of a DC parallel connection device, which may include: a processor 10, a memory 11, a communication interface 12, and a communication bus 13. The processor 10, the memory 11, and the communication interface 12 communicate with each other through the communication bus 13.

[0113] In the embodiment of the present application, the processor 10 may be a central processing unit (CPU), an application specific integrated circuit, a digital signal processor, a field programmable gate array or other programmable logic devices.

[0114] The processor 10 may call a program stored in the memory 11. Specifically, the processor 10 may execute operations in an embodiment of the abnormal IP identification method.

[0115] The memory 11 is used to store one or more programs, which may include program codes, and the program codes include computer operation instructions. In the embodiment of the present application, the memory 11 at least stores programs for implementing the following functions:

[0116] Determine corresponding parallel connection operation data based on the cable model and load data of the target feeder branch;

[0117] Conduct parallel connection test on target feeder branches;

[0118] When the parallel connection detection is passed, the robot arm is controlled to perform a piercing and parallel connection operation on the target feeder branch based on the parallel connection operation data;

[0119] When a new power supply access signal is received, the parallel connection exit operation is performed, and the insulation restoration process is performed on the pierced part of the target feeder branch;

[0120] When the insulation restoration process is completed, perform surface insulation detection on the target feeder branch;

[0121] When the surface insulation test passes, a cable insulation message is sent.

[0122] In a possible implementation, the memory 11 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function, etc.; the data storage area may store data created during use.

[0123] In addition, the memory 11 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device or other volatile solid-state storage device.

[0124] The communication interface 12 may be an interface of a communication module, and is used to connect to other devices or systems.

[0125] Of course, it should be noted that Figure 3 The structure shown does not constitute a limitation on the DC parallel connection device in the embodiment of the present application. In actual applications, the DC parallel connection device may include Figure 3 More or fewer components than shown, or combinations of certain components.

[0126] The present application also provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of any of the above-mentioned DC parallel connection methods for a DC system of a substation can be implemented.

[0127] The computer-readable storage medium may include: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes.

[0128] For an introduction to the computer-readable storage medium provided in this application, please refer to the above method embodiment, and this application will not go into details here.

[0129] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0130] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0131] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0132] The above is a detailed introduction to a DC parallel connection method, a DC parallel connection device, a DC parallel connection equipment, and a computer-readable storage medium for a DC system of a substation provided by the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A DC parallel connection method for a DC system of a substation, characterized in that: include: Determine corresponding parallel connection operation data based on the cable model and load data of the target feeder branch; Performing parallel connection detection on the target feeder branch; When the parallel connection detection is passed, the mechanical arm is controlled to perform a piercing and parallel connection operation on the target feeder branch based on the parallel connection operation data; When a new power supply connection signal is received, a parallel connection exit operation is performed, and insulation restoration processing is performed on the pierced part of the target feeder branch; When the insulation restoration process is completed, performing surface insulation detection on the target feeder branch; When the surface insulation test passes, a cable insulation message is sent.

2. The DC dedicated parallel connection method according to claim 1, characterized in that: Also includes: During the piercing and splicing operation, the exposed and leaking part of the target feeder branch is insulated and protected.

3. The DC dedicated parallel connection method according to claim 1, characterized in that: Performing insulation restoration processing on the punctured portion of the target feeder branch includes: The same material of the target feeder branch is used for melting treatment to obtain a repair liquid; The repair fluid is replenished to the puncture site of the target feeder branch by a robotic arm.

4. The DC dedicated parallel connection method according to claim 1, characterized in that: Performing parallel connection detection on the target feeder branch includes: Polarity detection and voltage difference detection are performed on the target feeder branch.

5. The DC dedicated parallel connection method according to claim 1, characterized in that: Also includes: When the insulation restoration process is completed, the target feeder branch is subjected to a flatness process by a robotic arm.

6. A DC parallel connection device for a DC system of a substation, characterized in that: include: An operation data determination module, used to determine corresponding parallel connection operation data based on the cable model and load data of the target feeder branch; A parallel connection detection module, used for performing parallel connection detection on the target feeder branch; A piercing and connecting operation module, used for controlling the mechanical arm to perform a piercing and connecting operation on the target feeder branch based on the connecting operation data when the connecting detection passes; An insulation recovery processing module, used for executing a parallel connection exit operation and performing insulation recovery processing on the pierced part of the target feeder branch when receiving a new power supply connection signal; A surface insulation detection module, used for performing surface insulation detection on the target feeder branch when the insulation recovery process is completed; The insulation message sending module is used to send the cable insulation message when the surface insulation detection passes.

7. The DC parallel connection device according to claim 6, characterized in that: Also includes: The insulation protection module is used to perform insulation protection on the exposed part of the target feeder branch during the piercing and connecting operation.

8. The DC parallel connection device according to claim 7, characterized in that: Also includes: The flatness processing module is used to perform flatness processing on the target feeder branch through a mechanical arm when the insulation recovery processing is completed.

9. A DC parallel connection device, characterized in that: include: Memory for storing computer programs; A processor is used to implement the steps of the DC dedicated parallel connection method as claimed in any one of claims 1 to 5 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the DC dedicated parallel connection method according to any one of claims 1 to 5 are implemented.

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