A method for automatically generating safety ticket for secondary circuit of substation

Abstract

The invention discloses a method for automatically generating a secondary circuit security ticket for a transformer substation. The method imports a secondary circuit connection description file SLCD between the whole station cabinets, selects a certain device as a target, takes the device as the center, automatically identifies its external connection relationship, disconnects the circuit connected with the outside according to a preset security library principle, and automatically generates a secondary security ticket. The method has the advantages that: there is no need to manually set the security ticket, and only needs to obtain the device connection relationship to disconnect the circuit connected with the outside according to the preset security library principle, and directly and automatically generate the secondary security ticket.

Description

Technical Field

[0001] The present invention relates to the technical field of security ticket generation, and more specifically to a method for automatically generating security tickets for a secondary circuit of a transformer substation. Background Art

[0002] In the prior art, the safety measures ticket for a substation is generally generated manually by manually checking the CAD drawings, checking the external connection circuits of the maintenance object, and judging which components or connection terminals to disconnect based on personal experience and maintenance procedures, and the safety measures ticket is generated manually, with a low level of automation.

[0003] Chinese patent publication number CN112182303A discloses a one-click generation method for substation safety measures tickets based on a general rule base for maintenance and safety measures. Starting from the safety measures requirements of various actual maintenance tasks of smart substations, all safety measures components are defined by exhaustive method, and the safety measures components are encoded to form a safety measures component coding dictionary table. Define a general rule base for maintenance and safety measures of smart substations to form a typical maintenance safety measures ticket library. Based on the typical maintenance safety measures ticket library and the safety measures component coding dictionary table, construct a typical maintenance safety measures ticket operation sequence template library based on the safety measures component data dictionary. By parsing the SCD model, identify the safety measures connection between the soft and hard pressure plates and devices of the entire station, instantiate all the safety measures components in the typical maintenance safety measures ticket operation sequence template library based on the safety measures component data dictionary, and realize the one-click automatic generation of safety measures tickets for the entire station. Substation equipment or wiring may change in real time. The automatic generation method of safety tickets in this patent application defines all safety components through exhaustive method. When the substation equipment or wiring changes, the safety components need to be re-determined. The whole process is labor-intensive and prone to errors, resulting in inaccurate generation of safety tickets or even failure to generate safety tickets. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the existing method for automatically generating security tickets requires re-determining security elements when substation equipment or wiring changes. The whole process is labor-intensive and prone to errors, resulting in inaccurate generation of security tickets or even failure to generate security tickets.

[0005] The present invention solves the above technical problems through the following technical means: a method for automatically generating secondary circuit safety tickets for substations, importing the secondary circuit connection description file SLCD between the panel cabinets of the entire station, selecting a certain device as the target, and automatically identifying its external connection relationship with the device as the center, disconnecting the circuit with the external connection according to the pre-defined safety library principle, and automatically generating a secondary safety ticket.

[0006] The present invention selects a certain device as a target according to the secondary circuit connection description file between the whole station panel cabinets, takes the device as the center, automatically identifies its external connection relationship, disconnects the circuit connected with the outside according to the pre-customized security library principle, and automatically generates a secondary security ticket. When the substation equipment or wiring changes, only the imported SLCA file will be changed, and there is no need to reconfirm the security components. The workload is small, the error rate is low, and the generated security ticket is accurate.

[0007] Furthermore, the secondary circuit connection description file generation process between the whole station panel cabinets includes:

[0008] Construct substation secondary circuit information model;

[0009] The CAD drawing of the substation secondary circuit is automatically recognized through CAD recognition software, and the text information and connection relationship information in the drawing are obtained. According to the definition of the substation secondary circuit information model, it is written into the corresponding attributes to form the SLCD file of the entire station.

[0010] Furthermore, the substation secondary circuit information model includes a SubStation element, the SubStation element is composed of multiple Region elements and multiple Cable elements, and the Region element is composed of multiple Cubicle elements; the SubStation element represents the substation information to which the model belongs; the Region element represents the small room in the power station, which is divided into indoor small room and outdoor small room; the Cubicle element is the panel cabinet in the secondary circuit; the Cable element represents the cable or optical cable between the panel cabinets, which includes several cable core elements Wire and several optical cable core elements Core.

[0011] Furthermore, the attributes of the cable or optical cable between the cabinets include the cable or optical cable number between the cabinets, the cabinet name CubicleA at one end of the cable or optical cable between the cabinets, and the cabinet name CubicleB at the other end of the cable or optical cable, where CubicleA and CubicleB are reference paths of the cabinets in the corresponding compartments;

[0012] The properties of the cable core element Wire include the cable core number, one end number of the cable core TerminalA and the other end number of the cable core TerminalB;

[0013] The attributes of the optical cable core element Core include the optical cable core number, one end number of the optical cable core PortA and the other end number of the optical cable core PortB;

[0014] InCore is used to represent the optical fiber connection within the cabinet, and Core is used to represent the optical cable connection between cabinets.

[0015] Furthermore, the CAD drawing of the substation secondary circuit is automatically recognized by the CAD drawing recognition software to obtain the text information and connection relationship information in the drawing, including:

[0016] Step 1: Establish a secondary component identification primitive library, formulate identification of secondary component types, and establish standard primitives for each secondary component based on the identification of secondary component types, which will be used as a basis for subsequent identification of secondary components;

[0017] Step 2: Identify the stamp of the CAD drawing, find the corresponding drawing number in the drawing catalog according to the stamp number, and determine the screen cabinet and device information to which the CAD drawing belongs;

[0018] Step 3: Automatically scale the drawing to a preset ratio, set the size of the recognition area frame, automatically adjust the size of the recognition area frame, identify various components in the CAD drawing, match the recognition area frame graphics according to the shapes and characteristics of each component in the secondary component recognition primitive library, and recognize the graphics that are consistent with the primitives in the secondary component recognition primitive library as secondary components;

[0019] Step 4: Obtain the attribute information of the picked secondary component. The secondary component attributes include the secondary device, secondary cabinet, secondary component name, and secondary component type to which the secondary component belongs. According to the position of the identified secondary component, the text content near the secondary component and the cabinet or device information to which the drawing belongs are traversed to identify the secondary component graphics and automatically obtain the attribute information of the secondary component.

[0020] Step 5: Pick up each connection line in the CAD drawing, obtain the connection points of the secondary components connected by the connection line through the coordinate positions of the first and last ends of the connection line, and obtain the connection relationship between the components by combining the position coordinates of the identified secondary components;

[0021] Step 6: Pick up the text box position coordinates and text in the CAD drawing, match them with the position coordinates of the connecting line, so as to obtain the corresponding relationship between the text box and the connecting line, assign the text in the text box to the function description attribute of the connecting line, and improve the function recognition of the connecting line;

[0022] Step 7: Repeat steps 2 to 6 to complete the recognition of all CAD drawings. According to the connection relationship of the drawings, integrate the connection information of each secondary component, and perform loop verification based on the secondary circuit connection relationship;

[0023] Step 8: Output the substation secondary circuit connection relationship file or XML file in a standard format according to actual needs.

[0024] Furthermore, the method for automatically generating safety tickets for secondary circuits of substations also includes a safety ticket verification process in which a user compares the safety ticket made by himself with the secondary safety ticket automatically generated by the system to determine whether the safety ticket made by himself is correct.

[0025] Furthermore, the secondary security ticket execution process is:

[0026] Enter the security execution function through a handheld mobile terminal, and compare the automatically generated secondary security ticket to display the number, function, cabinet location, terminal location, and secondary line number of the loop wiring that needs to be disconnected;

[0027] Furthermore, the pre-defined Ancuoku principles include:

[0028] Safety measures for line protection secondary circuit

[0029] 1) Check the positions of all switches and pressure plates on the protective screen;

[0030] 2) Check the bypass protection equipment on the protection screen, and take preventive measures to prevent accidental contact with the equipment or accidental switching of the switch;

[0031] 3) Disconnect the tripping pressure plate and closing pressure plate on the protection screen;

[0032] 4) Check the position of the voltage air switch, protective DC switch, and operating DC switch behind the protection screen;

[0033] 5) Disconnect the voltage air switch and the voltage busbar to the terminal on the protection screen;

[0034] 6) After disconnecting the protection screen, the secondary current circuit. If the switch is in operation, the outer side of the secondary current circuit on the terminal block must be short-circuited and well grounded before the current terminal can be opened;

[0035] 7) Disconnect the mother differential failure starting circuit and take insulation measures for the wire ends;

[0036] 8) Disconnect the protection to the recording start circuit and take insulation measures for the wire ends;

[0037] 9) Disconnect the positive power supply of the signal on the protection screen and insulate the wire ends;

[0038] 10) Put the pressure plate into maintenance.

[0039] Furthermore, the pre-defined Ancuoku principles include:

[0040] Safety measures for secondary circuit of main transformer protection panel

[0041] 1) Check all switches, current switching terminals and pressure plate positions on the protection screen;

[0042] 2) Check the voltage air switch, protective DC switch and operating power supply position behind the protection screen;

[0043] 3) Disconnect the tripping pressure plate, bypass tripping pressure plate and busbar pressure plate on the protection panel;

[0044] 4) Disconnect the voltage air switch and the voltage busbar to the terminal on the protection screen;

[0045] 5) Disconnect the secondary current circuit terminal on the protection screen. If the secondary current circuit is in operation, short-circuit and ground it on the outside of the terminal block to disconnect the grounding point of the secondary current circuit of the differential protection;

[0046] 6) Disconnect the busbar differential failure starting circuit, release the busbar differential voltage locking circuit of the main transformer, and take insulation measures for the line ends;

[0047] 7) Disconnect the protection starter recorder circuit and take insulation measures for the wire ends;

[0048] 8) Disconnect the positive power supply of the signal on the protection screen and take insulation measures for the wire ends;

[0049] 9) Put the pressure plate into maintenance.

[0050] Furthermore, the pre-defined Ancuoku principles include:

[0051] Safety measures for secondary circuit of busbar differential protection screen

[0052] 1) Check the positions of all switches and pressure plates on the protective screen;

[0053] 2) Check and disconnect all tripping pressure plates;

[0054] 3) Check the voltage air switch, DC switch and the position of the DC switch on the busbar operation control panel behind the protection panel;

[0055] 4) Check that the SD terminal in the busbar high current switching panel is short-circuited to the CT side and grounded;

[0056] 5) Disconnect the voltage air switch and the voltage busbar to the terminal on the protection screen;

[0057] 6) Disconnect the protection starter recorder circuit and take insulation measures for the wire ends;

[0058] 7) Disconnect the positive power supply of the signal on the protection screen and take insulation measures for the wire ends;

[0059] 8) Put the pressure plate into maintenance.

[0060] The advantages of the present invention are as follows: the present invention selects a certain device as a target according to the secondary circuit connection description file between the whole station panel cabinets, takes the device as the center, automatically identifies its external connection relationship, disconnects its circuit with the external connection according to the pre-customized security library principle, and automatically generates a secondary security ticket. When the substation equipment or wiring changes, only the imported SLCA file will be changed, and there is no need to reconfirm the security components. The workload is small, the error rate is low, and the generated security ticket is accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 A schematic diagram of the main structure of an SLCD file in a method for automatically generating a secondary circuit safety ticket for a substation disclosed in an embodiment of the present invention;

[0062] Figure 2 A schematic diagram of the hierarchical relationship of SLCD files in a method for automatically generating a secondary circuit safety ticket for a substation disclosed in an embodiment of the present invention;

[0063] Figure 3 The process of CAD drawing recognition in a method for automatically generating a secondary circuit safety ticket for a substation disclosed in an embodiment of the present invention;

[0064] Figure 4 The present invention discloses an RFID positioning principle diagram of a secondary safety ticket generation process in a method for automatically generating a secondary circuit safety ticket for a substation according to an embodiment of the present invention. DETAILED DESCRIPTION

[0065] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0066] A method for automatically generating a secondary circuit safety ticket for a substation. In the process of generating a secondary safety ticket, the secondary circuit connection description file SLCD between the panel cabinets of the entire station is very critical. The secondary circuit of the substation is visualized according to the secondary circuit connection description file SLCD between the panel cabinets of the entire station, and then a certain device is selected as the target. With the device as the center, its external connection relationship is automatically identified, and the circuit connected to the outside is disconnected according to the pre-defined safety library principle, and the secondary safety ticket is automatically generated. Therefore, the following first introduces how to generate the secondary circuit connection description file SLCD between the panel cabinets of the entire station, and then introduces how to realize the visualization of the secondary circuit of the substation, and finally introduces the pre-defined safety library principle, as well as how to implement the secondary safety ticket in practical applications.

[0067] 1. The process of SLCD file generation

[0068] like Figure 1 and Figure 2As shown, a substation secondary circuit information model is constructed, and the substation secondary circuit information model includes a SubStation element, which is composed of multiple Region elements and multiple Cable elements, and the Region element is composed of multiple Cubicle elements; the SubStation element represents the substation information to which the model belongs; the Region element represents the small room in the power station, which is divided into indoor small room and outdoor small room; the Cubicle element is the panel cabinet in the secondary circuit; the Cable element represents the cable or optical cable between the panel cabinets, which includes several cable core elements Wire and several optical cable core elements Core.

[0069] The attributes of the cable or optical cable between the cabinets include the cable or optical cable number between the cabinets, the cabinet name CubicleA at one end of the cable or optical cable between the cabinets, and the cabinet name CubicleB at the other end of the cable or optical cable, where CubicleA and CubicleB are reference paths of the cabinets in the corresponding compartments;

[0070] The properties of the cable core element Wire include the cable core number, one end number of the cable core TerminalA and the other end number of the cable core TerminalB;

[0071] The attributes of the optical cable core element Core include the optical cable core number, one end number of the optical cable core PortA and the other end number of the optical cable core PortB;

[0072] InCore is used to represent the optical fiber connection within the cabinet, and Core is used to represent the optical cable connection between cabinets.

[0073] In order to smoothly carry out secondary circuit modeling, it is necessary to retrieve the paper version of the substation drawings and draw CAD drawings based on the drawings photos or electronic drawings. For existing substations, sample CAD drawing recognition technology, automatically identify the substation secondary circuit CAD drawings through CAD drawing recognition software, obtain the text information and connection relationship information in the drawings, and write them into the corresponding attributes according to the definition of the substation secondary circuit information model to form the whole station SLCD file. For newly built substations, the equipment manufacturer responsible for generating the device provides the device model, and the panel cabinet manufacturer provides the panel cabinet model. Finally, after the models are submitted to the design institute, the design institute designs the secondary circuit model file SLCD file.

[0074] Using CAD drawing recognition to integrate and configure SLCD files can effectively ensure the consistency and correctness of the secondary system physical circuit model and CAD drawings, and can also solve the problem of CAD drawing digitization. Figure 3As shown, the CAD drawing of the substation secondary circuit is automatically recognized by the CAD drawing recognition software to obtain the text information and connection relationship information in the drawing, including:

[0075] Step 1: Establish a secondary component identification primitive library, formulate identification of secondary component types, and establish standard primitives for each secondary component based on the identification of secondary component types, which will be used as a basis for subsequent identification of secondary components;

[0076] Step 2: Identify the stamp of the CAD drawing, find the corresponding drawing number in the drawing catalog according to the stamp number, and determine the screen cabinet and device information to which the CAD drawing belongs;

[0077] Step 3: Automatically scale the drawing to a preset ratio, set the size of the recognition area frame, automatically adjust the size of the recognition area frame, identify various components in the CAD drawing, match the recognition area frame graphics according to the shapes and characteristics of each component in the secondary component recognition primitive library, and recognize the graphics that are consistent with the primitives in the secondary component recognition primitive library as secondary components;

[0078] Step 4: Obtain the attribute information of the picked secondary component. The secondary component attributes include the secondary device, secondary cabinet, secondary component name, and secondary component type to which the secondary component belongs. According to the position of the identified secondary component, the text content near the secondary component and the cabinet or device information to which the drawing belongs are traversed to identify the secondary component graphics and automatically obtain the attribute information of the secondary component.

[0079] Step 5: Pick up each connection line in the CAD drawing, obtain the connection points of the secondary components connected by the connection line through the coordinate positions of the first and last ends of the connection line, and obtain the connection relationship between the components by combining the position coordinates of the identified secondary components;

[0080] Step 6: Pick up the text box position coordinates and text in the CAD drawing, match them with the position coordinates of the connecting line, so as to obtain the corresponding relationship between the text box and the connecting line, assign the text in the text box to the function description attribute of the connecting line, and improve the function recognition of the connecting line;

[0081] Step 7: Repeat steps 2 to 6 to complete the recognition of all CAD drawings. According to the connection relationship of the drawings, integrate the connection information of each secondary component, and perform loop verification based on the secondary circuit connection relationship;

[0082] Step 8: Output the substation secondary circuit connection relationship file or XML file in a standard format according to actual needs.

[0083] Among them, the types of CAD drawings identified include: drawing catalog, secondary schematic diagram, front / back view of panel cabinet, device backplane diagram, component wiring diagram, optical cable connection diagram or optical cable connection table, and terminal block diagram.

[0084] The main types of secondary components identified include: coils, contacts, devices, switches, circuit breakers, windings, devices, power supplies, cabinets, terminal boxes, buttons, terminals, contact terminals, pressure plates, indicator lights, black box components, and motor components.

[0085] 2. Visual display of substation secondary circuit

[0086] Import and parse SLCD files, select the central device through the panel cabinet device list, automatically generate the secondary cable connection diagram between devices, display the connection between other devices associated with this device, mark the device name on the device, mark the cable number on the connection line, and jump between the central device and the associated devices;

[0087] Click the cable number of the panel cabinet to which the device belongs to display the loop connection between the two devices, including the loop number, loop description, and corresponding terminal block number;

[0088] Double-click a circuit number to display the full circuit information from positive to negative electricity, starting from positive electricity and ending at negative electricity, through the terminal block terminals, circuit breakers, pressure plates, and device board terminals.

[0089] 3. The principle of pre-ordered Ancuoku

[0090] For the secondary maintenance safety measures ticket and the secondary protection equipment modification safety measures ticket, the current generation of these two types of safety measures tickets is either written by comparing with CAD drawings, or written by comparing with the actual wiring terminals at the substation site. After the secondary system is modeled, the SLCD file contains the most comprehensive circuit information and terminal information, and can automatically generate the corresponding safety measures ticket according to certain rules. Relevant personnel can add, subtract or modify it on this basis, which greatly improves the efficiency of traditional substation safety measures ticket generation. In order to establish the principles of the secondary safety measures library, obtain the secondary safety measures tickets for various typical intervals applicable to the 220kV Jinma substation in Chongzuo, Guangxi. Sort out the secondary safety measures tickets for typical lines / main transformers / busbars / busbars of 220kV, 110kV and 10kV, and formulate the principles in the secondary safety measures library of the station based on the various secondary safety measures tickets provided by users. Examples of specific safety measures principles are as follows:

[0091] (1) Safety measures for line protection secondary circuits

[0092] 1) Check the positions of all switches and pressure plates on the protective screen and make records;

[0093] 2) Check the bypass protection equipment on the protection screen, and take preventive measures to prevent accidental contact with the equipment or accidental switching of the switch;

[0094] 3) Disconnect the tripping pressure plate and closing pressure plate on the protection screen;

[0095] 4) Check the position of the voltage air switch, protective DC switch and operating DC switch behind the protection screen, and keep records;

[0096] 5) Disconnect the voltage air switch and the voltage busbar to the terminal on the protection screen to prevent the voltage busbar from short circuit or grounding;

[0097] 6) After disconnecting the protection screen, the secondary current circuit. If the switch is in operation, the outer side of the secondary current circuit on the terminal block must be short-circuited and well grounded before the current terminal can be opened to prevent the secondary current transformer circuit from being open;

[0098] 7) Disconnect the starting circuit to the mother differential failure, and take insulation measures on the wire ends to prevent false starting;

[0099] 8) Disconnect the protection to the recording start circuit and take insulation measures on the wire ends to prevent the recorder from being started by mistake;

[0100] 9) Disconnect the positive power supply of the signal on the protection screen and take insulation measures on the wire ends to prevent interference to the operating personnel after sending the signal;

[0101] 10) Put the pressure plate into maintenance.

[0102] (2) Safety measures for secondary circuit of main transformer protection panel

[0103] 1) Check all switches, current switching terminals, and pressure plate positions on the protection screen and make records;

[0104] 2) Check the voltage air switch, protective DC switch, and operating power supply position behind the protection screen, and keep records;

[0105] 3) Disconnect the tripping pressure plate on the protection screen, especially the bypass and busbar pressure plates, and take preventive measures to prevent accidental tripping;

[0106] 4) Disconnect the voltage air switch and the voltage small busbar (busbar, bypass) to the terminal on the protection screen to prevent the voltage secondary circuit from short-circuiting or grounding;

[0107] 5) Disconnect the secondary current circuit terminal on the protection screen. If the secondary current circuit is in operation (local side, bypass), short-circuit it on the outside of the terminal block and ground it well to prevent the secondary current circuit from being open, and disconnect the grounding point of the differential protection secondary current circuit;

[0108] 6) Disconnect the bus differential failure starting circuit, release the bus differential voltage locking circuit of the main transformer, and take insulation measures at the line ends to prevent the bus differential circuit from being started by mistake;

[0109] 7) Disconnect the protection starter recorder circuit and take insulation measures on the wire ends to prevent the recorder from starting by mistake;

[0110] 8) Disconnect the positive power supply of the signal on the protection screen and take insulation measures on the wire ends to prevent interference to the operating personnel after sending the signal;

[0111] 9) Put the pressure plate into maintenance.

[0112] (3) Safety measures for secondary circuit of busbar differential protection screen

[0113] 1) Check the positions of all switches and pressure plates on the protective screen and make records;

[0114] 2) Check and disconnect all tripping pressure plates, and take measures to prevent false tripping;

[0115] 3) Check the voltage air switch, DC switch, and the DC switch position on the busbar operation control panel behind the protection screen, and make records;

[0116] 4) Check that the SD terminal in the busbar high current switching panel is short-circuited to the CT side and grounded;

[0117] 5) Disconnect the voltage air switch and the voltage busbar to the terminal on the protection screen to prevent the voltage circuit from being short-circuited or grounded;

[0118] 6) Disconnect the protection starter recorder circuit and take insulation measures on the wire ends to prevent the recorder from being started by mistake;

[0119] 7) Disconnect the positive power supply of the signal on the protection screen and take insulation measures on the wire ends to prevent interference to the operating personnel after sending the signal;

[0120] 8) Put the pressure plate into maintenance.

[0121] The method for automatically generating the secondary circuit security ticket of the present embodiment is integrated in the visualization system of the secondary circuit of the substation. The function of automatically generating the secondary security ticket is selected. After importing the SLCD file (secondary circuit model file), a certain device is selected as the target. The software takes the device as the center and automatically identifies its external connection relationship. On the software interface, the user can see the external circuit connected to the target device as the center, and click on the circuit to see the pressure plate, circuit breaker and other components related to the circuit in detail. Since the software presets the principle of customized security library, it will disconnect the circuit connected to the external according to the principle of customized security library, and automatically generate the secondary security ticket. The present embodiment finally issues the automatically generated secondary security ticket. The user compares the security ticket made by himself with the secondary security ticket automatically generated by this system, and the user judges whether the security ticket made by himself is correct.

[0122] 4. Specific implementation process of the secondary security ticket

[0123] like Figure 4As shown, by entering the security execution function through a handheld mobile terminal, one can compare the automatically generated secondary security ticket to display in detail the number, function, panel cabinet location, terminal location, and secondary line number of the loop connections that need to be disconnected.

[0124] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for automatically generating a secondary circuit safety ticket for a substation, characterized in that: Import the secondary circuit connection description file SLCD between the whole station cabinets, select a certain device as the target, take the device as the center, automatically identify its external connection relationship, disconnect its external connection circuit according to the pre-defined security library principle, and automatically generate a secondary security ticket; the secondary circuit connection description file generation process between the whole station cabinets includes: Construct substation secondary circuit information model; Automatically identify the substation secondary circuit CAD drawings through CAD drawing recognition software, obtain the text information and connection relationship information in the drawings, and write them into the corresponding attributes according to the definition of the substation secondary circuit information model to form the whole station SLCD file; The CAD drawing of the substation secondary circuit is automatically recognized by the CAD drawing recognition software to obtain text information and connection relationship information in the drawing, including: Step 1: Establish a secondary component identification primitive library, formulate identification of secondary component types, and establish standard primitives for each secondary component based on the identification of secondary component types, which will be used as a basis for subsequent identification of secondary components; Step 2: Identify the stamp of the CAD drawing, find the corresponding drawing number in the drawing catalog according to the stamp number, and determine the screen cabinet and device information to which the CAD drawing belongs; Step 3: Automatically scale the drawing to a preset ratio, set the size of the recognition area frame, automatically adjust the size of the recognition area frame, identify various components in the CAD drawing, match the recognition area frame graphics according to the shapes and characteristics of each component in the secondary component recognition primitive library, and recognize the graphics that are consistent with the primitives in the secondary component recognition primitive library as secondary components; Step 4: Obtain the attribute information of the picked secondary component. The secondary component attributes include the secondary device, secondary cabinet, secondary component name, and secondary component type to which the secondary component belongs. According to the position of the identified secondary component, the text content near the secondary component and the cabinet or device information to which the drawing belongs are traversed to identify the secondary component graphics and automatically obtain the attribute information of the secondary component. Step 5: Pick up each connection line in the CAD drawing, obtain the connection points of the secondary components connected by the connection line through the coordinate positions of the first and last ends of the connection line, and obtain the connection relationship between the components by combining the position coordinates of the identified secondary components; Step 6: Pick up the text box position coordinates and text in the CAD drawing, match them with the position coordinates of the connecting line, so as to obtain the corresponding relationship between the text box and the connecting line, assign the text in the text box to the function description attribute of the connecting line, and improve the function recognition of the connecting line; Step 7: Repeat steps 2 to 6 to complete the recognition of all CAD drawings. According to the connection relationship of the drawings, integrate the connection information of each secondary component, and perform loop verification based on the secondary circuit connection relationship; Step 8: Output the substation secondary circuit connection relationship file or XML file in a standard format according to actual needs.

2. A method for automatically generating a secondary circuit safety ticket for a substation according to claim 1, characterized in that: The substation secondary circuit information model includes a SubStation element, which is composed of multiple Region elements and multiple Cable elements, and the Region element is composed of multiple Cubicle elements; the SubStation element represents the substation information to which the model belongs; the Region element represents the small room in the power station, which is divided into indoor small room and outdoor small room; the Cubicle element is the panel cabinet in the secondary circuit; the Cable element represents the cable or optical cable between the panel cabinets, which contains several cable core elements Wire and several optical cable core elements Core.

3. A method for automatically generating a secondary circuit safety ticket for a substation according to claim 2, characterized in that: The attributes of the cable or optical cable between the cabinets include the cable or optical cable number between the cabinets, the cabinet name CubicleA at one end of the cable or optical cable between the cabinets, and the cabinet name CubicleB at the other end of the cable or optical cable, where CubicleA and CubicleB are reference paths of the cabinets in the corresponding compartments; The properties of the cable core element Wire include the cable core number, one end number of the cable core TerminalA and the other end number of the cable core TerminalB; The attributes of the optical cable core element Core include the optical cable core number, one end number of the optical cable core PortA and the other end number of the optical cable core PortB; InCore is used to represent the optical fiber connection within the cabinet, and Core is used to represent the optical cable connection between cabinets.

4. A method for automatically generating a secondary circuit safety ticket for a substation according to claim 1, characterized in that: It also includes an Ancuo ticket verification process in which the user compares the Ancuo ticket made by himself with the secondary Ancuo ticket automatically generated by this system to determine whether the Ancuo ticket made by himself is correct.

5. A method for automatically generating a secondary circuit safety ticket for a substation according to claim 1, characterized in that: The execution process of the secondary security ticket is as follows: Through the handheld mobile terminal, enter the security execution function, and compare it with the automatically generated secondary security ticket to display the number, function, panel cabinet location, terminal location, and secondary line number of the loop connections that need to be disconnected.

6. A method for automatically generating a secondary circuit safety ticket for a substation according to claim 1, characterized in that: The pre-made Ancuoku principles include: Safety measures for secondary circuits of line protection 1) Check the positions of all switches and pressure plates on the protective screen; 2) Check the bypass protection equipment on the protection screen, and take preventive measures to prevent accidental contact with the equipment or accidental switching of the switch; 3) Disconnect the tripping pressure plate and closing pressure plate on the protection screen; 4) Check the position of the voltage air switch, protective DC switch, and operating DC switch behind the protection screen; 5) Disconnect the voltage air switch and the voltage busbar to the terminal on the protection screen; 6) After disconnecting the protection screen, the secondary current circuit. If the switch is in operation, the outer side of the secondary current circuit on the terminal block must be short-circuited and well grounded before the current terminal can be opened; 7) Disconnect the mother differential failure starting circuit and take insulation measures for the wire ends; 8) Disconnect the protection to the recording start circuit and take insulation measures for the wire ends; 9) Disconnect the positive power supply of the signal on the protection screen and insulate the wire ends; 10) Put the pressure plate into maintenance.

7. A method for automatically generating a secondary circuit safety ticket for a substation according to claim 1, characterized in that: The pre-made Ancuoku principles include: Safety measures for secondary circuit of main transformer protection panel 1) Check all switches, current switching terminals and pressure plate positions on the protection screen; 2) Check the voltage air switch, protective DC switch and operating power supply position behind the protection screen; 3) Disconnect the tripping pressure plate, bypass tripping pressure plate and busbar pressure plate on the protection panel; 4) Disconnect the voltage air switch and the voltage busbar to the terminal on the protection screen; 5) Disconnect the secondary current circuit terminal on the protection screen. If the secondary current circuit is in operation, short-circuit and ground it on the outside of the terminal block to disconnect the grounding point of the secondary current circuit of the differential protection; 6) Disconnect the busbar differential failure starting circuit, release the busbar differential voltage locking circuit of the main transformer, and take insulation measures for the line ends; 7) Disconnect the protection starter recorder circuit and take insulation measures for the wire ends; 8) Disconnect the positive power supply of the signal on the protection screen and take insulation measures for the wire ends; 9) Put the pressure plate into maintenance.

8. A method for automatically generating a secondary circuit safety ticket for a substation according to claim 1, characterized in that: The pre-made Ancuoku principles include: Safety measures for secondary circuit of busbar differential protection screen 1) Check the positions of all switches and pressure plates on the protective screen; 2) Check and disconnect all tripping pressure plates; 3) Check the voltage air switch, DC switch and the position of the DC switch on the busbar operation control panel behind the protection panel; 4) Check that the SD terminal in the busbar high current switching panel is short-circuited to the CT side and grounded; 5) Disconnect the voltage air switch and the voltage busbar to the terminal on the protection screen; 6) Disconnect the protection starter recorder circuit and take insulation measures for the wire ends; 7) Disconnect the positive power supply of the signal on the protection screen and take insulation measures for the wire ends; 8) Put the pressure plate into maintenance.

Images