Management method for secondary circuit of transformer substation

Abstract

The invention provides a transformer substation secondary circuit management method, which comprises the following steps: acquiring a secondary circuit drawing of a transformer substation, and performing identification and information extraction on the secondary circuit drawing to obtain operation equipment in the secondary circuit and a connection relationship between the operation equipment; constructing a virtual management sphere based on a secondary circuit, mapping the operation equipment to the surface of the virtual management sphere, and connecting the operation equipment according to the connection relationship; dividing the secondary loop into a plurality of function links, identifying the operation equipment on the virtual management sphere, determining the function link to which the operation equipment belongs, and visually displaying the function link; according to user requirements, selecting a corresponding function link to perform simulation prediction management; the secondary circuit is converted into the three-dimensional virtual management sphere, the operation equipment and the function link are visualized, a user can conveniently and quickly search the operation equipment and the function link, meanwhile, a simulation prediction function of the function link is provided, and normal operation of the secondary circuit and the transformer substation is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid management, and in particular to a management method for a secondary circuit of a transformer substation. Background Art

[0002] As the core control and protection unit of the power system, the secondary circuit of the substation undertakes key functions such as signal acquisition, command transmission, equipment control and fault isolation. With the rapid advancement of smart grids, the number of secondary circuit devices has increased sharply and the connection complexity has increased significantly. Traditional management methods face severe challenges in reliability, real-time performance and intelligence.

[0003] Currently, secondary circuit management relies on manual inspections and verification of paper drawings. Paper drawings are two-dimensional data. When there are many secondary circuit devices, the data volume of the entire drawing is relatively large. When performing manual management, it is difficult to quickly find the required equipment. In addition, during operation, the secondary circuit will be classified into different links, such as protection links including relays, measurement links including CT / PT, and control links including circuit breakers. Different links are composed of different devices, and it is often difficult to mark all links on paper drawings. Different links may overlap, and it is impossible to quickly and accurately determine the link on the paper drawings. In addition, paper drawings are only used for reading, and cannot be used for targeted display and human-computer interaction based on the different links on the drawings. Summary of the Invention

[0004] In view of this, the present invention proposes a management method for the secondary circuit of a substation, which performs a visual display of the secondary circuit and adds simulation and prediction management to ensure the stable operation of the secondary circuit of the substation.

[0005] The technical solution of the present invention is achieved as follows:

[0006] A method for managing a secondary circuit of a substation comprises the following steps:

[0007] Step S1: Obtain a secondary circuit drawing of the substation, identify and extract information from the secondary circuit drawing, and obtain the operating equipment in the secondary circuit and the connection relationship between the operating equipment;

[0008] Step S2: construct a virtual management sphere based on the secondary loop, map the running devices onto the surface of the virtual management sphere, and connect the running devices according to the connection relationship;

[0009] Step S3: Divide the secondary loop into several functional links, identify the operating equipment on the virtual management sphere, determine the functional link to which the operating equipment belongs, and visualize the functional link;

[0010] Step S4. Select the corresponding functional link for simulation prediction management according to user requirements.

[0011] Preferably, the specific steps of step S1 include:

[0012] Step S11. Obtain the secondary circuit drawings of the substation from the substation design unit or the data database.

[0013] Step S12. Convert the secondary circuit drawings into image format, and perform image preprocessing and noise elimination.

[0014] Step S13. Extract text information and identify graphic elements from the processed secondary circuit drawings, and determine the operating equipment based on the text information extraction and graphic element identification.

[0015] Step S14. Obtain the connection relationship between the operating equipment.

[0016] Preferably, the specific steps of step S14 include:

[0017] Step S141. Extract the connecting lines between the operating equipment from the processed secondary circuit drawings and output them as physical connection relationships.

[0018] Step S142. Obtain the operation and maintenance data of the substation, and extract the design specifications, communication protocols, real-time data monitoring, and topological structure from the operation and maintenance data.

[0019] Step S143. Obtain the operating equipment that is not directly connected according to the design specifications, communication protocols, real-time data monitoring, and topological structure, and output it as a wireless logical connection relationship.

[0020] Preferably, the specific steps of step S2 are as follows:

[0021] Step S21. Determine the diameter according to the number of operating equipment in the secondary circuit, and construct a virtual management sphere based on the diameter.

[0022] Step S22. Map the operating equipment onto the surface of the virtual management sphere, and connect the operating equipment on the surface of the virtual management sphere based on the physical connection relationship.

[0023] Step S23. Connect the operating equipment inside the virtual management sphere based on the wireless logical connection relationship.

[0024] Preferably, when the physical connection relationship between two operating equipment overlaps with the wireless logical relationship, the line connecting the two operating equipment on the virtual management sphere based on the physical connection relationship is deleted.

[0025] Preferably, the specific steps of step S3 include:

[0026] Step S31: Divide the functional links based on the functional zones of the substation to which the secondary circuit belongs. The functional links include protection links, control links, measurement links, signal links, power supply links, and communication links.

[0027] Step S32: Identify the types of operating devices on the virtual management sphere, and determine the functional links to which the operating devices belong by combining the type identification results of the operating devices and the operation and maintenance logs.

[0028] Step S33: Visually display the virtual management sphere on the human-machine interaction screen, and highlight the functional links when the user clicks on the functional links on the virtual management sphere.

[0029] Preferably, step S3 further includes:

[0030] Step S34: Obtain the fault maintenance records of the substation secondary circuit, determine the functional link to which the fault belongs according to the fault maintenance records, and extract the historical fault records corresponding to the functional link in the fault maintenance records at the same time.

[0031] Step S35: Add the historical fault records to the functional links, and display the historical fault records when the user clicks on the functional links on the virtual management sphere.

[0032] Preferably, the specific steps of step S4 are as follows:

[0033] Step S41: Obtain the requirements input by the user, parse the requirements, and obtain the requirement classification. The requirement classification includes safety type, performance type, and economic type.

[0034] Step S42: Match keywords based on the requirement classification results, and select the corresponding functional links.

[0035] Step S43: Perform simulation prediction management on the functional links.

[0036] Preferably, the specific steps of step S43 are as follows:

[0037] Step S431: Build a simulation fault database based on the functional links. The simulation fault database contains several simulation faults and the corresponding simulation configurations of the simulation faults.

[0038] Step S432: After selecting the corresponding functional link, judge whether there are historical fault records in the functional link.

[0039] Step S433: When there are no historical fault records, randomly extract the simulation configurations corresponding to the simulation faults from the simulation fault database.

[0040] Step S434: Inject the analog configuration corresponding to the extracted analog fault into the functional link and visually display the operation of the functional link.

[0041] Preferably, the specific steps of step S43 are as follows:

[0042] Step S435: When there is a historical fault record, extract the faulty operating devices from the historical fault record.

[0043] Step S436: Match the faulty operating devices with the analog fault database to obtain the analog faults that match the faulty operating devices, and extract the analog configurations corresponding to the analog faults.

[0044] Step S437: Inject the analog configuration into the operating device corresponding to the faulty operating device in the functional link and visually display the operation of the functional link.

[0045] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0046] ① After identifying and extracting information from the secondary circuit drawings of the substation, the operating devices in the secondary circuit and the connection relationships between the operating devices can be obtained. Then, a virtual management sphere can be constructed, and based on the operating devices and connection relationships, they can be mapped onto the virtual management sphere to achieve the visual display of the secondary circuit. At the same time, through the sphere display method, the operating devices and the connection relationships between the operating devices can be displayed more three-dimensionally, facilitating the management personnel to quickly confirm the location of the operating devices and the upstream and downstream connection relationships.

[0047] ② After mapping the operating devices onto the virtual management sphere, based on the classification of the functional links of the secondary circuit, different functional links are displayed on the virtual management sphere. The management personnel can quickly determine the functional links to which the operating devices belong. At the same time, a function of simulating and predicting the functional links is added, and whether there are abnormalities in the secondary circuit is evaluated through the operating status on the virtual management sphere to ensure the normal operation of the substation. Description of the Drawings

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only the preferred embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0049] Figure 1 It is a flowchart of a management method for the secondary circuit of a substation according to the present invention.

[0050] Figure 2Flow chart of step S1 of a management method for secondary circuits of a substation according to the present invention;

[0051] Figure 3 Flow chart of step S14 of a management method for secondary circuits of a substation according to the present invention;

[0052] Figure 4 Flow chart of step S2 of a management method for secondary circuits of a substation according to the present invention;

[0053] Figure 5 Flow chart of step S3 of a management method for secondary circuits of a substation according to the present invention;

[0054] Figure 6 Flow chart of step S4 of a management method for secondary circuits of a substation according to the present invention;

[0055] Figure 7 Flow chart of step S43 of a management method for secondary circuits of a substation according to the present invention; Detailed implementation manner

[0056] To better understand the technical content of the present invention, a specific embodiment is provided below, and the present invention will be further described in conjunction with the accompanying drawings.

[0057] See Figures 1 to 7 , a management method for secondary circuits of a substation provided by the present invention includes the following steps:

[0058] Step S1, obtain the secondary circuit drawings of the substation, identify and extract information from the secondary circuit drawings to obtain the operating equipment in the secondary circuit and the connection relationships between the operating equipment;

[0059] Step S2, construct a virtual management sphere based on the secondary circuit, map the operating equipment onto the surface of the virtual management sphere, and connect the operating equipment according to the connection relationships;

[0060] Step S3, divide the secondary circuit into several functional links, identify the operating equipment on the virtual management sphere, determine the functional links to which the operating equipment belongs, and visually display the functional links;

[0061] Step S4, select the corresponding functional link for simulation prediction management according to user requirements.

[0062] The secondary circuit of the substation contains several operating devices, such as circuit breakers, electric meters, power supplies, disconnectors, relays, etc. Different operating devices perform different functions, and different operating devices are connected by lines to form a complete secondary circuit. When managing the secondary circuit, it is necessary to clarify all the operating devices contained in the secondary circuit and the connection relationship between the operating devices. The operation and maintenance of traditional substations mostly use paper drawings or two-dimensional drawings such as CAD. After obtaining the secondary circuit drawings, image analysis and other methods are used to identify the drawings and extract information, so that the operating devices and the connection relationship between the operating devices can be extracted from the secondary circuit drawings. When there are many devices, it is difficult to view them through two-dimensional drawings. Therefore, the present invention combines the original The two-dimensional management of this paper is converted into three-dimensional management, and a virtual management sphere based on the secondary circuit is constructed. The entire virtual management sphere can be regarded as the secondary circuit of the substation. After mapping all the operating equipment in the secondary circuit to the surface of the sphere, the operating equipment is connected based on the connection relationship of the operating equipment. At this time, the various operating equipment and the connection relationship between the operating equipment can be intuitively viewed on the virtual management sphere. The virtual management sphere provides human-computer interaction function. When the user clicks on the operating equipment, the operating equipment as a whole will be enlarged and the connection lines between the operating equipment and other operating equipment will be enlarged or highlighted at the same time, so that the user can observe the connection relationship between the operating equipment. Compared with two-dimensional drawings, the display is more intuitive and the connection relationship between the operating equipment can be quickly found.

[0063] In addition, the secondary circuit of the substation can also divide the operating equipment into different functional links according to different functions. Each functional link has different functions. The operating equipment is mapped on the virtual management sphere. After the operating equipment is connected, it is necessary to determine the functional link to which each operating equipment belongs based on the daily use of the substation. One functional link will contain several operating equipment with a connection relationship. After determining the functional link, the functional link can be visualized. Similarly, the visual display is also a human-computer interaction display. When the user clicks on the corresponding functional link, the functional link can be displayed in a targeted manner. The user does not need to judge the functional link to which the operating equipment belongs. The direction and position of a functional link can be quickly determined. In addition, according to user needs, the functional link can also be simulated and predicted. By simulating and predicting the functional links on the virtual management sphere, the operating status of the secondary circuit can be detected. If there is an abnormality, it means that there is a potential fault risk in the actual functional link of the secondary circuit, which needs to be processed in time to ensure the stable operation of the substation and the secondary circuit.

[0064] Preferably, the specific steps of step S1 include:

[0065] Step S11: Obtain the secondary circuit drawings of the substation from the substation design unit or the data database.

[0066] Step S12: Convert the secondary circuit drawings into an image format, and perform image preprocessing and noise elimination.

[0067] Step S13: Extract text information and identify graphic elements from the processed secondary circuit drawings, and determine the operating equipment based on the text information extraction and graphic element identification.

[0068] Step S14: Obtain the connection relationships between the operating equipment.

[0069] In the initial stage of the substation design, the design unit will construct the substation based on the drawings, so the design unit will retain the secondary circuit drawings of the substation. During the daily operation of the substation, the substation staff may make changes to the secondary circuit, such as adding or deleting operating equipment. Therefore, the secondary circuit drawings also need to be obtained in combination with the substation data database. After obtaining the secondary circuit drawings, they need to be converted into an image format that is convenient for recognition, and at the same time, the image is preprocessed and noise is eliminated. The image preprocessing includes format conversion, resolution adjustment, and version verification, etc. Noise elimination can use median filtering or Gaussian blur to remove noise points and retain clear lines and text. After the image processing is completed, the labels and standards of the operating equipment are identified through text information extraction. At the same time, after obtaining the graphic data of the operating equipment through graphic element identification and comparing it with the standard graphic library, the operating equipment can be finally determined by combining text information extraction and image element identification. When extracting the connection lines, a skeletonization algorithm can be used for recognition to obtain the connection relationships between the operating equipment.

[0070] Preferably, the specific steps of the said Step S14 include:

[0071] Step S141: Extract the connection lines between the operating equipment from the processed secondary circuit drawings and output them as physical connection relationships.

[0072] Step S142: Obtain the operation and maintenance data of the substation, and extract the design specifications, communication protocols, real-time data monitoring, and topological structure from the operation and maintenance data.

[0073] Step S143: Obtain the operating equipment that is not directly connected according to the design specifications, communication protocols, real-time data monitoring, and topological structure, and output it as a wireless logical connection relationship.

[0074] For the connections between operating devices, they are divided into wired connections and wireless connections. Among them, the wired connections will be directly shown on the drawings. Therefore, the connection lines between operating devices can be directly extracted from the processed secondary circuit drawings, and the connection lines can be output as physical connection relationships. While the wireless connections generally will not be shown on the drawings. Therefore, it is necessary to obtain the operation and maintenance data of the substation, and extract the design specifications, communication protocols, real-time data monitoring, and topological structure from the operation and maintenance data. The role of the design specifications is to clarify the configuration rules and function definitions of logical connections. If the design specifications clarify that two operating devices interact through a protocol rather than physical wiring, it is determined as a logical connection and can be output as a wireless logical connection relationship. The communication protocol contains the data transmission between operating devices through the protocol. Therefore, this connection relationship also belongs to the wireless logical connection relationship. The role of real-time data monitoring is to dynamically capture the communication status of logical connections. If it is monitored that an operating device continuously sends protocol messages to another operating device, but there is no connection relationship between the two, it can be determined as a wireless logical connection relationship. And through the dependency relationship of the topological structure, it can be further determined whether there is a wireless logical connection relationship between operating devices.

[0075] Preferably, the specific steps of step S2 are as follows:

[0076] Step S21: Determine the diameter according to the number of operating devices in the secondary circuit, and construct a virtual management sphere based on the diameter;

[0077] Step S22: Map the operating devices onto the surface of the virtual management sphere, and connect the operating devices on the surface of the virtual management sphere based on the physical connection relationship;

[0078] Step S23: Connect the operating devices inside the virtual management sphere based on the wireless logical connection relationship.

[0079] After obtaining the operating devices and the connection relationships between the operating devices, it is necessary to construct a virtual management sphere based on the secondary circuit. The diameter of the virtual management sphere is not fixed. When the number of operating devices is large, the diameter of the virtual management sphere needs to be increased adaptively to ensure that all operating devices can be accommodated on the surface of the virtual management sphere. After mapping the operating devices onto the surface of the virtual sphere, the operating devices need to be connected. Among them, the physical connection relationship is carried out on the surface of the virtual sphere, while the wireless logical connection relationship is carried out inside the virtual management sphere. Separating the physical connection relationship and the wireless logical connection relationship can avoid the chaos between the lines and facilitate users to quickly determine the connection relationship between two operating devices.

[0080] Preferably, when the physical connection relationship between two operating devices overlaps with the wireless logical relationship, the line connecting the two operating devices on the virtual management sphere based on the physical connection relationship is deleted.

[0081] In the secondary circuit, there may be physical connections and wireless connections between some operating devices. Since the space on the surface of the virtual management sphere is limited, the physical connection lines can be deleted to reduce the number of overlapping lines on the surface of the virtual management sphere and avoid visual chaos.

[0082] Preferably, the specific steps of step S3 include:

[0083] Step S31: Divide functional links based on the functional zones of the substation to which the secondary circuit belongs. The functional links include protection links, control links, measurement links, signal links, power supply links, and communication links;

[0084] Step S32: Identify the types of operating devices on the virtual management sphere, and determine the functional links to which the operating devices belong in combination with the type identification results of the operating devices and the operation and maintenance logs;

[0085] Step S33: Visually display the virtual management sphere on the man-machine interaction screen, and highlight the functional link when the user clicks on the functional link on the virtual management sphere;

[0086] Step S34: Obtain the fault maintenance records of the secondary circuit of the substation, determine the functional link to which the fault belongs according to the fault maintenance records, and extract the historical fault records corresponding to the functional link in the fault maintenance records;

[0087] Step S35: Add the historical fault records to the functional link, and display the historical fault records when the user clicks on the functional link on the virtual management sphere.

[0088] For the secondary circuit, the links can be divided according to the functional zones of the substation. The functional links include protection links, control links, measurement links, signal links, power supply links, and communication links. The protection links are used to implement fault detection and isolation. The control links are used to execute the opening and closing of circuit breakers and the operation of disconnectors. The measurement links are used to collect analog quantities such as current and voltage for monitoring and metering. The signal links are used to transmit status signals. The power supply links can provide DC or AC control power for operating equipment. The communication links can support data transmission such as GOOSE / SV messages and time synchronization signals. Different links have different functions. After determining the functional links, identify the types of all operating equipment on the virtual management sphere. According to the type identification results and operation and maintenance logs, the functional links to which the operating equipment belongs can be determined. The same operating equipment may belong to multiple different or identical functional links. All functional links can be visually displayed. To facilitate users to intuitively view the functional links, the present invention adopts a human-computer interaction display method, that is, when the user clicks on a certain functional link, the functional link is highlighted, and the other unclicked functional links are in a gray state, so that the user can quickly determine the operating equipment on the functional link.

[0089] In addition to providing high-light display of functional links, the present invention also adds the historical fault records of functional links to the functional links. When the user clicks on a functional link, the historical fault records can be displayed, which is convenient for users to obtain the historical fault conditions of the functional links.

[0090] Preferably, the specific steps of step S4 are as follows:

[0091] Step S41: Obtain the requirements input by the user, parse the requirements, and obtain requirement classifications, where the requirement classifications include safety class, performance class, and economic class;

[0092] Step S42: Match keywords based on the requirement classification results and select the corresponding functional links;

[0093] Step S43: Perform simulation prediction management on the functional links.

[0094] In addition to visually viewing each operating device and each functional link on the virtual management sphere, simulation prediction management can also be performed. According to different user requirements, different functional links can be selected. When the user inputs their requirements, the requirements can be parsed using a GUI form or natural language parsing. According to the parsing results, the requirement classification is determined. The requirement classification includes security, performance, and economy. For example, security includes the failure probability of the protection link and the power-off risk of the power link. Performance includes the communication link delay, abnormal control instruction response, etc. Different requirement classifications correspond to different functional links. After matching keywords based on the requirement classification results, the corresponding functional link can be selected, and then the functional link can be simulated and predicted.

[0095] Preferably, the specific steps of step S43 are as follows:

[0096] Step S431: Construct a simulation fault database based on the functional link. The simulation fault database contains several simulation faults and the corresponding simulation configurations for the simulation faults.

[0097] Step S432: After selecting the corresponding functional link, determine whether there is a historical fault record in the functional link.

[0098] Step S433: When there is no historical fault record, randomly extract the simulation configuration corresponding to the simulation fault from the simulation fault database.

[0099] Step S434: Inject the simulation configuration corresponding to the extracted simulation fault into the functional link and visually display the operation of the functional link.

[0100] Step S435: When there is a historical fault record, extract the faulty operating device from the historical fault record.

[0101] Step S436: Match the faulty operating device with the simulation fault database to obtain the simulation fault that matches the faulty operating device, and extract the simulation configuration corresponding to the simulation fault.

[0102] Step S437: Inject the simulation configuration into the operating device corresponding to the faulty operating device on the functional link and visually display the operation of the functional link.

[0103] When performing simulation prediction, first, a simulation fault database needs to be constructed. The simulation fault database contains the possible simulation faults of the corresponding functional link and the simulation configurations corresponding to the simulation faults. The simulation configuration refers to the abnormal configuration of the operating devices on the functional link. For example, the switch buffer overflow probability = 15%, the delay threshold = 4ms, etc. This simulation configuration will affect the communication link, that is, several simulation faults that can be used to detect the anti-interference ability of the secondary circuit are preset in the simulation fault database.

[0104] After the user selects the corresponding function link, it is necessary to determine whether the function link contains historical fault records. When there are historical fault records, it indicates that there has been a fault in the operating device in the function link. Therefore, the faulty operating device can be extracted from the historical fault records. Compare the faulty operating device with the content in the simulated fault database. After finding the simulated fault that matches the faulty operating device, extract the corresponding simulated configuration of the simulated fault. Finally, inject the simulated configuration into the corresponding operating device in the function link to simulate whether the function link will still be abnormal when the operating device has the same configuration, that is, perform a self-check of historical faults on the operating device to determine whether the operating device will still have the previous fault conditions.

[0105] When there are no historical fault records in the function link, a simulated fault can be randomly selected from the simulated fault database at this time, and then the corresponding simulated configuration of the simulated fault is injected into the function link to determine whether the function link is abnormal and evaluate the anti-interference ability of the function link to prevent the secondary circuit from being directly paralyzed and affecting the normal operation of the substation when affected.

[0106] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A management method for the secondary circuit of a substation, characterized in that, Including the following steps: Step S1: Obtain the secondary circuit diagram of the substation, identify and extract information from the secondary circuit diagram to obtain the operating equipment in the secondary circuit and the connection relationship between the operating equipment; Step S2: Construct a virtual management sphere based on the secondary circuit, map the operating equipment onto the surface of the virtual management sphere, and connect the operating equipment according to the connection relationship; Step S3: Divide the secondary circuit into several functional links, identify the operating equipment on the virtual management sphere, determine the functional link to which the operating equipment belongs, and visually display the functional link; Step S4: According to the user's needs, select the corresponding functional link for simulation prediction management.

2. The management method of a secondary circuit of a substation according to claim 1, characterized in that, The specific steps of step S1 include: Step S11: Obtain the secondary circuit diagram of the substation from the substation design unit or the data database; Step S12: Convert the secondary circuit diagram into an image format, and perform image preprocessing and noise elimination; Step S13: Extract text information and identify graphic elements from the processed secondary circuit diagram, and determine the operating equipment based on the text information extraction and graphic element identification; Step S14: Obtain the connection relationship between the operating equipment.

3. A method for managing a secondary circuit of a substation according to claim 2, characterized in that: The specific steps of step S14 include: Step S141: Extract the connection lines between the operating equipment from the processed secondary circuit diagram and output them as physical connection relationships; Step S142: Obtain the operation and maintenance data of the substation, and extract the design specifications, communication protocols, real-time data monitoring, and topological structure from the operation and maintenance data; Step S143: Obtain the operating equipment that is not directly connected according to the design specifications, communication protocols, real-time data monitoring, and topological structure, and output it as a wireless logical connection relationship.

4. A method for managing a secondary circuit of a substation according to claim 3, characterized in that: The specific steps of step S2 are: Step S21: Determine the diameter according to the number of operating equipment in the secondary circuit, and construct a virtual management sphere based on the diameter; Step S22: Map the operating equipment onto the surface of the virtual management sphere, and connect the operating equipment on the surface of the virtual management sphere based on the physical connection relationship; Step S23: Connect the operating equipment inside the virtual management sphere based on the wireless logical connection relationship.

5. The management method of a secondary circuit of a substation according to claim 4, characterized in that When the physical connection relationship between two operating equipment overlaps with the wireless logical relationship, delete the line connecting the two operating equipment on the virtual management sphere based on the physical connection relationship.

6. A method for managing a secondary circuit of a substation according to claim 1, characterized in that: The specific steps of step S3 include: Step S31: Divide the functional links based on the functional partitions of the substation to which the secondary circuit belongs. The functional links include protection links, control links, measurement links, signal links, power supply links, and communication links; Step S32: Identify the types of operating equipment on the virtual management sphere, and determine the functional link to which the operating equipment belongs in combination with the type identification result of the operating equipment and the operation and maintenance log; Step S33: Visually display the virtual management sphere on the human-computer interaction screen, and highlight the functional link when the user clicks on the functional link on the virtual management sphere.

7. The management method of a secondary circuit of a substation according to claim 6, characterized in that, Step S3 also includes: Step S34: Obtain the fault maintenance records of the secondary circuit of the substation, determine the functional link to which the fault belongs according to the fault maintenance records, and extract the historical fault records corresponding to the functional link in the fault maintenance records; Step S35: Add the historical fault records to the functional link, and display the historical fault records when the user clicks on the functional link on the virtual management sphere.

8. The management method of a secondary circuit of a substation according to claim 1, wherein, The specific steps of step S4 are as follows: Step S41: Obtain the requirements input by the user, parse the requirements, and obtain requirement classifications, where the requirement classifications include safety, performance, and economy; Step S42: Match keywords based on the requirement classification results and select the corresponding functional link; Step S43: Conduct simulation prediction management on the functional link.

9. The management method of a secondary circuit of a substation according to claim 8, characterized in that The specific steps of step S43 are as follows: Step S431: Construct a simulation fault database based on the functional link, where the simulation fault database contains several simulation faults and the simulation configurations corresponding to the simulation faults; Step S432: After selecting the corresponding functional link, determine whether there are historical fault records in the functional link; Step S433: When there are no historical fault records, randomly extract the simulation configurations corresponding to the simulation faults from the simulation fault database; Step S434: Inject the extracted simulation configurations corresponding to the simulation faults into the functional link and visually display the operation of the functional link.

10. A management method for the secondary circuit of a substation according to claim 8, characterized in that, The specific steps of step S43 are as follows: Step S435: When there are historical fault records, extract the faulty operating equipment from the historical fault records; Step S436: Match the faulty operating equipment with the simulation fault database to obtain the simulation faults that match the faulty operating equipment, and extract the simulation configurations corresponding to the simulation faults; Step S437: Inject the simulation configuration into the operating equipment corresponding to the faulty operating equipment in the functional link and visually display the operation of the functional link.

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