Power transmission and transformation project construction analogue simulation method based on digital twinning

Abstract

The invention relates to the technical field of engineering construction simulation, in particular to a power transmission and transformation engineering construction analogue simulation method based on digital twinning. When misoperation occurs in the disassembly and assembly process, the simulation system can calculate virtual construction stress changes in real time and judge whether falling and collision abnormal conditions possibly occur or not, when collision occurs, the collision impulse is calculated based on the relative speed, the bounce behavior of virtual construction after collision is controlled in combination with the bounce coefficient, tangential movement is simulated through friction force, and therefore the collision accuracy is improved. The reasonable motion trail of the virtual construction equipment on the virtual ground is ensured; the method is advantaged in that an interaction scene and a future time pre-response mechanism are immersed, a user can experience possible construction risks in the future in a virtual environment in advance, possible dangerous operation is warned in advance, optimization suggestions are provided, constructors can carry out identification before actual operation, timely decision-making capability is improved, and risks are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering construction simulation, and in particular to a method for simulation of power transmission and transformation engineering construction based on digital twins. Background Art

[0002] During the construction and operation and maintenance of power transmission and transformation projects, there are many challenges in the disassembly, assembly, maintenance and accident response of construction equipment. Traditional methods mainly rely on two-dimensional design drawings, manual experience, and basic physical simulation for operation guidance. It is difficult to accurately predict the dynamic risks in the construction process, especially when critical accidents such as abnormal disassembly, equipment collision, oil leakage, etc. occur. Existing technical means are difficult to provide real-time feedback and pre-response mechanisms.

[0003] Therefore, the existing deficiencies include: Lack of real-time dynamic simulation. Current power transmission and transformation project construction simulation is usually based on BIM (Building Information Modeling). However, BIM focuses on structure and information management and lacks deep integration with the physical engine. It cannot accurately simulate the dynamic behavior of construction equipment in a real physical environment (such as collision, sliding, and damage).

[0004] Unable to effectively predict accidents and their impacts. Traditional safety analysis is based on historical data and empirical rules. It is unable to predict equipment damage caused by misoperation, the mutual impact between construction equipment, and possible chain accidents before construction. Lack of immersive risk experience. Existing construction training and risk avoidance strategies mainly rely on text, images or 2D videos, which make it difficult to provide an immersive experience in combination with future work conditions. This makes it difficult for users to perceive potential risks in advance in the future in the real world, improve decision-making capabilities, and reduce safety hazards. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a power transmission and transformation project construction simulation method based on digital twins, which can effectively solve the problem that the prior art cannot accurately simulate the dynamic behavior of construction equipment in a real physical environment, resulting in difficulty in subsequent application in the real world, and cannot reduce the safety hazards of users' subsequent operations in the real world.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a power transmission and transformation engineering construction simulation method based on digital twin, comprising the following steps: Combine the 3D model of the power transmission and transformation project with environmental data to build a digital twin model and define immersive interactive scenarios; Determine whether the user will dismantle, assemble, or repair equipment related to the power transmission and transformation project in the future time of the real world. If the user dismantles, assembles, or repairs equipment in the future time of the real world, then: The immersive interactive scene combines with the physical engine to simulate the abnormal disassembly and assembly scene when the virtual construction equipment is disassembled and assembled by the robot arm and collides with the virtual ground, where: The collision impulse is calculated by the relative velocity component between the virtual construction equipment and the virtual ground in the normal direction of the collision and the relative velocity component is updated. The rebound strength is controlled based on the rebound coefficient to simulate the running state of the virtual construction equipment when it collides. The tangential velocity is affected by the friction force to simulate the friction damping, simulating the virtual construction equipment to gradually stop on the virtual ground. Based on the abnormal disassembly and assembly scenario, the associated impact factors affecting other virtual construction equipment are defined, and the associated risk index is calculated based on the associated impact factors. The associated risk index is combined with the damage index to calculate the impact of the virtual construction equipment on other virtual construction equipment, so as to realize the simulation of the associated virtual impact scenario; When the virtual construction equipment is a transformer: Whether the transformer oil leakage is triggered is determined based on the damage indicators. If triggered, the electrical damage indicators of the transformer in the collision are defined. The oil leakage and electrical damage indicators are combined to simulate the associated virtual combustion scenario. Based on the abnormal disassembly and assembly scenarios, associated virtual impact scenarios, and associated virtual combustion scenarios, the pre-response to disassembly and assembly maintenance operations in the future in the real world is achieved.

[0007] Furthermore, the method for determining the environmental data is: Obtain the future location information of power transmission and transformation projects in the real world; Determine the environmental data corresponding to the location information, including temperature and humidity data, air pollution data, wind data, and rain and snow data.

[0008] Whether the abnormal disassembly and assembly process is triggered is determined based on the position of the virtual construction equipment held by the robot arm. If triggered, the abnormal disassembly and assembly scenario is simulated.

[0009] The abnormal disassembly and assembly scenario also includes simulating the free fall trajectory of the transformer, specifically: Use the gravity update formula to calculate its instantaneous velocity and position: in, Indicates the transformer at time The instantaneous speed at represents the initial position of the transformer in the robot arm, represents the acceleration due to gravity, represents the time after the free fall starts, Indicates the transformer at time The position at Indicates the initial speed of the transformer when it leaves the robot arm; The physics engine updates the instantaneous velocity and position of the transformer using the gravity update formula in each simulation time step to simulate the free-fall trajectory of the transformer.

[0010] Furthermore, by setting collision bodies for the transformer, robotic arm and virtual ground respectively, a collision event is triggered when the transformer falls to the virtual ground, and a collision response calculation is performed. The gradual stop state of the virtual construction equipment is simulated through the calculation of friction and tangential velocity, thereby realizing the simulation of abnormal disassembly and assembly scenarios.

[0011] The friction force is calculated as follows: Calculate the relative velocity component of the transformer relative to the virtual ground in the collision normal direction before the collision ; Using collision impulse Update the relative speed component of the transformer as follows: represents the virtual ground quality, Represents the rebound coefficient, Indicates the quality of the transformer; After the collision, the relative velocity component is updated to : After the collision, the friction Then we have: , represents the duration of the collision process, Represents the friction coefficient, which describes the friction characteristics between the transformer and the virtual ground.

[0012] Furthermore, the tangential velocity passes through the initial velocity Update as follows: Then, the updated tangential velocity is obtained : Represents the tangential impulse generated by friction during the collision.

[0013] Furthermore, the correlation risk index is calculated based on the correlation impact factor. The correlation risk index is combined with the damage index to calculate the impact of the virtual construction equipment on other virtual construction equipment. The specific solution is: Defining the Correlation Impact Factor , Indicates the distance from the transformer collision center to other virtual devices; Definition The associated risk index of other affected virtual devices , Indicates the original risk of other virtual devices, represents the proportionality coefficient; Combined with transformer damage indicators Risk index associated with other virtual devices Get the overall risk index : represents the basic risk value, represents the damage weight coefficient, Indicates the number of other virtual devices affected, based on the overall risk index Get the impact on other virtual construction equipment.

[0014] Furthermore, the method of simulating and associating a virtual combustion scene is as follows: Defining Electrical Damage Indicators ; If the electrical damage indicator Exceeding the electrical anomaly threshold triggers an arc or spark; Calculate ignition energy , represents the proportionality coefficient; When the oil concentration in the oil leakage area Reaching the concentration threshold, combined with the ignition energy , satisfying the conditions: , It represents the minimum ignition energy required under the oil concentration to trigger the associated virtual combustion scenario.

[0015] A computer-readable storage medium stores a computer program, which implements the steps of the above method when executed by a processor.

[0016] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects: When misoperation occurs during the disassembly and assembly process (such as the robot arm is not accurately aligned with the center of gravity of the equipment, the fixed clamping force is insufficient, etc.), the simulation system can calculate the force changes of the virtual construction in real time and determine whether an abnormal fall or collision may occur. When a collision occurs, the collision impulse is calculated based on the relative speed, and the rebound coefficient is combined to control the bouncing behavior of the virtual construction after the collision. Friction is used to simulate tangential motion to ensure the reasonable motion trajectory of the virtual construction equipment on the virtual ground. By calculating the associated impact factors, a multi-level impact assessment model for virtual construction collisions is constructed to solve the problem that traditional simulation technology can only analyze a single device but cannot effectively predict cascading failures. After a collision occurs, the system calculates the damage index of the device based on the quality, structural stiffness and impulse size of the virtual construction, and uses the impact factor attenuation model (impulse / distance squared) to assess whether the surrounding equipment may be subject to secondary impacts. Immersive interactive scenes and future time pre-response mechanisms allow users to experience possible future construction risks in a virtual environment, warn of possible dangerous operations in advance, and provide optimization suggestions so that construction personnel can identify them before actual operations, improve their ability to make timely responses and avoid risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the overall method of the present invention. DETAILED DESCRIPTION

[0019] 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 conjunction with the drawings in 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.

[0020] The present invention will be further described below in conjunction with the embodiments.

[0021] Example 1 (see Figure 1 ): A power transmission and transformation project construction simulation method based on digital twins includes at least the following steps: Obtain the preset power transmission and transformation project drawing data, and build a three-dimensional model of the power transmission and transformation project through the BIM model, covering key components of the power transmission and transformation project such as houses, tower cranes, transmission towers, and construction rooms; Obtain the future location information of the power transmission and transformation project in the real world, determine the corresponding environmental data under the current location information in the real world, including temperature and humidity data, air pollution data, wind data, rain and snow data, etc., dynamically simulate the environmental data during the construction process of the three-dimensional model, and generate a digital twin model; In this way, a preliminary simulation of the construction of the power transmission and transformation project is achieved. It is worth mentioning that the simulation here is based on the environmental data corresponding to the future location information of the power transmission and transformation project in the real world. The resulting digital twin model can be continuously updated according to the actual construction data and simulation results, so that the digital twin model is always consistent with the physical system (any changes that occur during the construction process, such as equipment status, resource scheduling, construction progress, environmental parameters, etc., will be updated in real time to the digital twin model through data collection, transmission and processing, thereby ensuring that the digital twin model is always synchronized with the physical system in the real world).

[0022] Furthermore, it also includes: By building an immersive interactive scene based on the digital twin model (through virtual reality or augmented reality devices), users can experience the operating status of the power transmission and transformation project construction site in real time. This will make it easier for users to obtain detailed project data and safety warning information based on the actual operating status they experience.

[0023] Furthermore, in order to combine the current immersive interactive scene with the user's actual physical examination, realize construction simulation, and predict the user's subsequent operation risks in the future construction process of the power transmission and transformation project in the real world, and reduce the user's operation safety hazards, the following steps are also included: Determine whether the user will dismantle, assemble, and repair equipment related to power transmission and transformation projects in the future in the real world. If so, then: The immersive interactive scene combines with the physical engine to simulate the abnormal disassembly and assembly scene of the virtual construction equipment (transformer) when it is disassembled and assembled by the robotic arm (such as the user operating the lifting robotic arm). During the disassembly and assembly process, the virtual construction equipment is simulated to collide due to misoperation without auxiliary positioning. The specific simulation construction method is as follows: During normal operation, the robot arm follows the preset ideal holding position. , calculation error , Indicates the actual position of the virtual construction equipment held by the robot arm. If it is greater than the threshold, the error operation trigger condition is met. At this time, the robot arm auxiliary positioning fails, the system disconnects the virtual connection (auxiliary positioning), and the abnormal disassembly process is triggered; If the virtual construction equipment is a transformer, the following steps are performed: The transformer starts to fall freely from its current position, and its instantaneous speed and position are calculated using the gravity update formula: in, Indicates the transformer at time The instantaneous speed at represents the initial position of the transformer in the robot arm, represents the acceleration due to gravity, represents the time after the free fall starts, Indicates the transformer at time The position at represents the initial speed of the transformer when it leaves the robotic arm. The physics engine will use the above formula to update the instantaneous speed and position of the transformer in each simulation time step to simulate the free fall trajectory of the transformer; Then, collision bodies are set for the transformer, the robot arm, and the virtual ground. The collision body approximates the shape of the actual object with a simplified shape (such as a box or a sphere) to detect whether the two are in contact. Therefore, when the transformer falls and reaches the virtual ground, the physics engine triggers a collision event, and therefore, the collision response calculation is performed: Calculate the relative velocity component of the transformer relative to the virtual ground in the collision normal direction before the collision ; According to the rebound coefficient (describing the degree of velocity reversal after a collision) and the mass of the transformer , using the collision impulse Update the relative speed component of the transformer as follows: in, Represents the virtual ground quality, due to Very large, thinking that the transformer absorbs most of the impact; After the collision, the relative velocity component of the transformer in the normal direction is updated to : in, Represents the relative velocity component in the normal direction after the collision, which ensures that the rebound effect is as expected; After the collision occurs, in addition to the normal impulse, friction will also be generated, causing the transformer's tangential motion (along the direction parallel to the virtual ground) to decay. The calculation of is as follows: represents the duration of the collision process, represents the friction coefficient, describing the friction characteristics between the transformer and the virtual ground; The friction force will generate a friction impulse in the tangential direction, which will cause the tangential velocity of the transformer to decay. Suppose the initial tangential velocity of the transformer after the collision is , then the tangential impulse generated by friction during the collision is for: Then, update the tangential velocity : Friction reduces the tangential speed, causing the equipment to gradually stop after the collision. Therefore, after the entire accident response process is completed, the deformation, cracks, and ruptures of the casing or oil tank caused by the impact are recorded. The extent of the damage can be determined based on simulation algorithms (such as finite element method and fault tree analysis method, which will not be elaborated here), and the post-collision state of the virtual transformer and the entire abnormal disassembly and assembly scenario can be accurately simulated to provide quantitative data for subsequent risk assessment.

[0024] It should be noted that: in the abnormal disassembly and assembly scenario, and when reflecting the risk of collision of virtual construction equipment, the associated virtual impact scenario caused by the virtual construction equipment colliding with the virtual ground on other nearby virtual equipment can be obtained synchronously, so as to realize the observation of the immersive interactive scenario corresponding to the entire power transmission and transformation project construction, and effectively improve the fit of the entire immersive interactive scenario for application in the real world, so as to further enable users to consider the risk abnormal disassembly and assembly scenario in advance when constructing power transmission and transformation projects in the real world, and perform corresponding risk avoidance, as follows: Determine the total deformation area, number of cracks, crack area, and number of rupture points of the transformer shell and oil tank after collision, and calculate the damage index by weighted calculation ; Defining the Correlation Impact Factor , Indicates the distance from the transformer collision center to other virtual devices and the associated impact factor Describes the intensity of the impact of the collision on other virtual devices around it. The closer the virtual area is, the greater the impact is, and the impact decays with the square of the distance. Definition The associated risk index of other affected virtual devices , Indicates the original risk of other virtual devices, represents the proportionality coefficient; Combine transformer damage indicators with other virtual equipment related risk indices Get the overall risk index : in, represents the basic risk value, represents the damage weight coefficient, Indicates the number of other virtual devices affected, based on the overall risk index The associated impact of other virtual devices around the transformer after the collision is simulated, that is, the associated virtual impact scenario is obtained. The abnormal disassembly and assembly scenario triggered is based on whether the user will perform disassembly and assembly maintenance operations on the equipment related to the power transmission and transformation project in the future in the real world. Therefore, when the user leaves the immersive interactive scenario constructed this time and returns to the real world to perform disassembly and assembly maintenance operations in the power transmission and transformation project, the user can intuitively understand the accident risk based on the abnormal disassembly and assembly scenario and the associated virtual impact scenario in the immersive interactive scenario, which is conducive to predicting and avoiding risks in subsequent real operations.

[0025] Furthermore, in the abnormal disassembly and assembly scenarios obtained above, a variety of different virtual grounds can be obtained when the virtual ground is hit, and the deformation, cracks and ruptures of the transformer oil tank leading to the diffusion of oil can be simulated simultaneously, that is, the associated virtual impact scenario. This coupled simulation will help to assess the subsequent risks of accidents in the construction of power transmission and transformation projects in the future real world, and will facilitate the formulation of corresponding management and control plans.

[0026] Correspondingly, if an associated virtual impact scene is obtained, it should be noted that when there are multiple associated virtual impact scenes obtained and they are distributed in different virtual areas, that is, the multiple associated virtual impact scenes correspond to different virtual areas respectively: In the corresponding associated virtual impact scenarios, when the virtual construction equipment (transformer) collides and causes the oil leakage to expand, the virtual construction equipment is simulated to have internal electrical components (such as high-voltage components or connection terminals inside the transformer) come into contact with the virtual ground or other metal components after the collision, and arcs or sparks are formed when the insulation layer is damaged. The simulation then simulates the collision between the oil leakage and the arcs or sparks, leading to an associated virtual combustion scenario in which combustion is triggered, providing a comprehensive and practical associated virtual combustion scenario.

[0027] The specific method of simulating the associated virtual combustion scene is: If the damage indicator If the damage threshold is exceeded, the oil tank is judged to be ruptured, and the oil leakage is simulated. The diffusion process of the oil on the virtual ground is described, and then: in, Indicates at time and location The oil concentration at It represents the oil diffusion coefficient, which reflects the diffusion speed of the oil. represents the local flow velocity, such as the local motion caused by gravity or other environmental factors, represents the source term, describing the continuous leakage of oil at the rupture. The diffusion equation is used to simulate the diffusion of oil on the virtual ground over time, thus forming the spatial distribution of oil coverage and penetration; According to the above, during the collision, the high-voltage components or connection terminals inside the transformer may be damaged due to the impact and contact with the virtual ground or other metal parts, that is, an electrical damage index is defined , which can be estimated by the temperature rise or the abnormal amplitude of the local electric field caused by the collision; Among them, if the electrical damage index If the electrical anomaly threshold is exceeded and an arc or spark is triggered, the ignition energy is calculated. , ignition energy Describes the energy of arc or spark after collision, which is released due to internal electrical damage, providing initial energy input for oil ignition. represents the proportionality coefficient; When the oil concentration in the oil leakage area Reaching the concentration threshold, plus the ignition energy , satisfying the conditions: , Indicates oil concentration Therefore, when the spark energy is sufficient to ignite the high-concentration oil, combustion is triggered. Once the ignition conditions are met, the combustion simulation stage begins. In this stage, a chemical reaction coupled fluid dynamics model is used to describe the evolution of flame propagation, heat release, and temperature field, as follows: The combustion process uses Arrheniu reaction kinetics to describe the chemical reaction rate between leaked oil and oxygen: in, represents the pre-reaction factor, represents the mass fraction of oil, They represent the kinetic index, represents the activation energy, is the gas constant, represents the gas phase temperature in the combustion zone, Indicates the mass fraction of oxygen, describes the reaction rate between oil and oxygen, and determines the combustion speed and oil consumption rate; Combustion releases heat, causing the temperature to rise. The energy equation is as follows: in, represents the fluid density (the density of the combustion gas, affected by temperature and combustion reaction), represents the specific heat capacity at constant pressure, Indicates the thermal conductivity of the combustion gas, which affects the heat diffusion. It indicates the heat released by combustion per unit volume and describes the heat transfer during the combustion process; When describing the combustion of oil vapor, define the mass conservation relationship (to ensure the total mass conservation during the combustion process): Represents the velocity field (gas flow field velocity, affected by thermal expansion and buoyancy), describing the velocity vector of the airflow; Combustion causes a change in airflow, and its equation of motion is as follows: in, represents the pressure of the combustion gas phase, Indicates the viscosity of the combustion gas (oil vapor and air mixture). represents the buoyancy term (due to the increase in temperature, hot gases rise, affecting the flame shape), represents the turbulent force; Describe the flame front propagation: represents the flame front scale function (describing the position of the flame surface, the flame propagation direction depends on the flow field), The laminar flame propagation speed is affected by the oil properties and turbulence; Calculate the burning intensity and flame spread: in, represents the total volume of the virtual area burned, The total heat release of the entire virtual combustion area is represented, and the intensity of the combustion is evaluated. Through the above, the associated virtual combustion scene can be constructed reliably.

[0028] It is worth noting that in the process of simulating the associated virtual combustion scene, since each associated virtual combustion scene is located in a different virtual area, during the simulation, multiple associated virtual combustion scenes are simulated at the same time, and multiple burning virtual areas can be simulated in the immersive interactive scene, that is, the extreme risk scene composed of multiple associated virtual combustion scenes is defined, and then, the target virtual area scenes at different risk levels can be judged. For example, if the virtual area where multiple associated virtual combustion scenes are located forms a ring, usually as the fire expands inward and outward, the risk level of the center point of the ring gradually increases with the increase of burning time, because the fire in multiple associated virtual combustion scenes will approach it, therefore, the prediction of the target virtual area scenes of different risk levels can be realized in this case, and the auxiliary prediction of the degree of damage can be realized simultaneously according to the resource cost in the target virtual area scene, and at the same time, based on this extreme risk scene, it is convenient to plan the risk hazards during the construction of power transmission and transformation projects in the future real world, such as barrier-free paths, the configuration quantity of fire-fighting facilities, and the configuration points.

[0029] Among them, if fire-fighting facilities are pre-configured in the immersive interactive scene, the working status of pre-built-in fire-fighting facilities (smoke alarms, sprinkler systems) in other virtual areas in the immersive interactive scene will be further monitored as the fire spreads. If the working status of the fire-fighting facilities is abnormal (such as the smoke alarm and the sprinkler system are not working or are working abnormally, such as the sprinkler system cannot spray normally or the spraying amount is small, and the smoke alarm has a reduced alarm sound, which is not the preset volume), it is more convenient to observe the changes in the fire burning process, such as the spread trend, etc. At the same time, the actual performance of the fire-fighting facilities in the extreme risk scenario is obtained to determine whether the configuration of the fire-fighting facilities should be improved according to the extreme risk scenario of the current simulation. At the same time, synchronous simulation is performed for different types of fire-fighting facilities to clarify the actual performance of different types of fire-fighting facilities in order to avoid poor fire-fighting facilities.

[0030] The multiple virtual scenarios triggered, including the associated virtual combustion scenarios, associated virtual impact scenarios, and extreme risk scenarios, are all guided and constructed based on whether the user will perform disassembly, assembly, and maintenance operations on the equipment related to the power transmission and transformation project in the future in the real world. The abnormal disassembly and assembly scenarios, associated virtual combustion scenarios, associated virtual impact scenarios, and extreme risk scenarios previously encountered in immersive interactive scenarios can reveal the risks and hidden dangers encountered in the subsequent disassembly and assembly maintenance operations, and guide the user to perform the disassembly and assembly maintenance operations in a standardized manner, thereby reducing safety hazards.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power transmission and transformation project construction simulation method based on digital twins, characterized in that: The steps include: Combine the 3D model of the power transmission and transformation project with environmental data to build a digital twin model and define immersive interactive scenarios; Determine whether the user will dismantle, assemble, or repair equipment related to the power transmission and transformation project in the future time of the real world. If the user dismantles, assembles, or repairs equipment in the future time of the real world, then: The immersive interactive scene combines with the physical engine to simulate the abnormal disassembly and assembly scene when the virtual construction equipment is disassembled and assembled by the robot arm and collides with the virtual ground, where: The collision impulse is calculated by the relative velocity component between the virtual construction equipment and the virtual ground in the normal direction of the collision and the relative velocity component is updated. The rebound strength is controlled based on the rebound coefficient to simulate the running state of the virtual construction equipment when it collides. The tangential velocity is affected by the friction force to simulate the friction damping, simulating the virtual construction equipment to gradually stop on the virtual ground. Based on the abnormal disassembly and assembly scenario, the associated impact factors affecting other virtual construction equipment are defined, and the associated risk index is calculated based on the associated impact factors. The associated risk index is combined with the damage index to calculate the impact of the virtual construction equipment on other virtual construction equipment, so as to realize the simulation of the associated virtual impact scenario; When the virtual construction equipment is a transformer: Whether the transformer oil leakage is triggered is determined based on the damage indicators. If triggered, the electrical damage indicators of the transformer in the collision are defined. The oil leakage and electrical damage indicators are combined to simulate the associated virtual combustion scenario. Based on the abnormal disassembly and assembly scenarios, associated virtual impact scenarios, and associated virtual combustion scenarios, the pre-response to the disassembly and assembly maintenance operations in the future in the real world is achieved.

2. The method for simulating construction of power transmission and transformation engineering based on digital twin according to claim 1 is characterized in that: The method for determining the environmental data is: Obtain the future location information of power transmission and transformation projects in the real world; Determine the environmental data corresponding to the location information, including temperature and humidity data, air pollution data, wind data, and rain and snow data.

3. The method for simulating construction of power transmission and transformation projects based on digital twins according to claim 1 is characterized in that: Whether the abnormal disassembly and assembly process is triggered is determined based on the position of the virtual construction equipment held by the robot arm. If triggered, the abnormal disassembly and assembly scenario is simulated.

4. The method for simulating construction of power transmission and transformation projects based on digital twins according to claim 3 is characterized in that: The abnormal disassembly and assembly scenario also includes simulating the free fall trajectory of the transformer, specifically: Use the gravity update formula to calculate its instantaneous velocity and position: in, Indicates the transformer at time The instantaneous speed at represents the initial position of the transformer in the robot arm, represents the acceleration due to gravity, represents the time after the free fall starts, Indicates the transformer at time The position at Indicates the initial speed of the transformer when it leaves the robot arm; The physics engine updates the instantaneous velocity and position of the transformer using the gravity update formula in each simulation time step to simulate the free-fall trajectory of the transformer.

5. The method for simulating construction of power transmission and transformation projects based on digital twins according to claim 4 is characterized in that: By setting collision bodies for the transformer, robotic arm and virtual ground respectively, a collision event is triggered when the transformer falls to the virtual ground, and a collision response calculation is performed. The friction force and tangential velocity are calculated to simulate the gradual stop of the virtual construction equipment, thereby realizing the simulation of abnormal disassembly and assembly scenarios.

6. The method for simulating construction of power transmission and transformation engineering based on digital twin according to claim 5 is characterized in that: The friction force is calculated as follows: Calculate the relative velocity component of the transformer relative to the virtual ground in the collision normal direction before the collision ; Using collision impulse Update the relative speed component of the transformer as follows: represents the virtual ground quality, Reflection coefficient, Indicates the quality of the transformer; After the collision, the relative velocity component is updated to : After the collision, the friction Then we have: , represents the duration of the collision process, Represents the friction coefficient, which describes the friction characteristics between the transformer and the virtual ground.

7. The method for simulating construction of power transmission and transformation projects based on digital twins according to claim 6 is characterized in that: The tangential velocity is the initial velocity Update as follows: Then, the updated tangential velocity is obtained : Represents the tangential impulse generated by friction during the collision.

8. The method for simulating construction of power transmission and transformation engineering based on digital twin according to claim 7 is characterized in that: The correlation risk index is calculated based on the correlation impact factor. The correlation risk index is combined with the damage index to calculate the impact of the virtual construction equipment on other virtual construction equipment. The specific solution is: Defining the Correlation Impact Factor , Indicates the distance from the transformer collision center to other virtual devices; Definition The associated risk index of other affected virtual devices , Indicates the original risk of other virtual devices, represents the proportionality coefficient; Combined with transformer damage indicators Risk index associated with other virtual devices Get the overall risk index : represents the basic risk value, represents the damage weight coefficient, Indicates the number of other virtual devices affected, based on the overall risk index Get the impact on other virtual construction equipment.

9. The method for simulating construction of power transmission and transformation engineering based on digital twin according to claim 1, characterized in that: The method for simulating and associating a virtual combustion scene is as follows: Defining Electrical Damage Indicators ; If the electrical damage indicator Exceeding the electrical anomaly threshold triggers an arc or spark; Calculate ignition energy , represents the proportionality coefficient; When the oil concentration in the oil leakage area Reaching the concentration threshold, combined with the ignition energy , satisfying the conditions: , It represents the minimum ignition energy required under the oil concentration to trigger the associated virtual combustion scenario.

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

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