A circuit breaker construction virtual prototype simulation method, system, device and storage medium

Abstract

The application discloses a circuit breaker structure virtual prototype simulation method, system, device and storage medium, and comprises the following steps: establishing a multi-body dynamics simulation model; wherein the multi-body dynamics simulation model is provided with a co-simulation interface; according to the co-simulation interface, the multi-body dynamics simulation model and a hydraulic operating mechanism simulation model are subjected to data interaction, so that the output of the hydraulic operating mechanism simulation model is used as the input of the multi-body dynamics simulation model, and the output of the multi-body dynamics simulation model is used as the input of the hydraulic operating mechanism simulation model; according to the obtained data, the hydraulic operating mechanism simulation model and the multi-body dynamics simulation model are subjected to coupling analysis, and a second influence result of the structure parameters of the hydraulic cylinder on the switching characteristics of the operating mechanism of the circuit breaker is obtained; and the application can reflect the load size of the hydraulic operating system at each moment in real time, and improve the accuracy of the research on the characteristics of the hydraulic operating mechanism of the high-voltage circuit breaker.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker mechanical characteristic simulation, specifically to a method, system, equipment, and storage medium for simulating a virtual prototype of a circuit breaker. Background Technology

[0002] High-voltage circuit breakers are key equipment for power transmission. They play two roles in the power grid: control, which involves putting a portion of the power lines or equipment into or out of operation as needed; and protection, which involves quickly disconnecting the faulty part of the power line or equipment from the grid when a fault occurs, ensuring the normal operation of the fault-free parts of the grid.

[0003] The operating mechanism of a high-voltage circuit breaker converts electrical signals into mechanical signals via electromagnets when a closing or tripping command arrives. This mechanical signal is amplified and rapidly drives the contacts to actuate, completing the circuit breaker's closing or tripping task. The performance and quality of the operating mechanism play a crucial role in the overall performance and reliability of the high-voltage circuit breaker. During operation, the coordination between the circuit breaker's driving force and load force determines its motion characteristics and the loads on its components. Therefore, establishing a simulation model of the circuit breaker's operating mechanism and analyzing its force parameters is of significant practical importance for improving the circuit breaker's reliability.

[0004] While existing research includes simulation methods for the characteristics of hydraulic operating mechanisms in high-voltage circuit breakers, these methods primarily involve building models of the hydraulic operating mechanisms within AMESim. Since the hydraulic operating mechanism does not directly connect to the moving contact but rather uses a series of linkages as a bridge, conventional calculations involve manually calculating the equivalent mass and linearizing the transmission ratio of the linkage system. However, the transmission ratio of linkage systems is typically not linear, leading to insufficient calculation accuracy. Therefore, there is an urgent need for a model of the hydraulic operating mechanism that can reflect the load magnitude of the hydraulic operating system at various moments in real time, thereby improving the accuracy of research on the characteristics of high-voltage circuit breaker hydraulic operating mechanisms. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the prior art by proposing a virtual prototype simulation method, system, equipment, and storage medium for circuit breakers, which can reflect the load size of the hydraulic operating system at various times in real time, thereby improving the accuracy of research on the characteristics of the hydraulic operating mechanism of high-voltage circuit breakers.

[0006] In a first aspect, the present invention provides a method for simulating a virtual prototype of a circuit breaker, comprising:

[0007] Based on the three-dimensional model of the circuit breaker and the constraints of the corresponding transmission relationship, a multibody dynamics simulation model is established; wherein, the multibody dynamics simulation model is equipped with a co-simulation interface;

[0008] According to the co-simulation interface, the multibody dynamics simulation model and the hydraulic operating mechanism simulation model interact with each other, so that the output of the hydraulic operating mechanism simulation model is used as the input of the multibody dynamics simulation model, and the output of the multibody dynamics simulation model is used as the input of the hydraulic operating mechanism simulation model; wherein, the hydraulic operating mechanism simulation model is established based on the three-dimensional model of the hydraulic operating mechanism;

[0009] Based on the data obtained from the interaction, a coupling analysis is performed on the simulation model of the hydraulic operating mechanism to obtain the first influence result of each simulation parameter of the hydraulic operating mechanism simulation model on the characteristics of the disc spring operating mechanism.

[0010] The first influence result is imported into the multibody dynamics simulation model for mechanical analysis to obtain the motion parameters of the circuit breaker moving contact. Based on the motion parameters, the second influence result of the hydraulic cylinder structural parameters on the opening and closing characteristics of the circuit breaker's operating mechanism is obtained.

[0011] This invention constructs a multibody dynamics simulation model and a hydraulic operating mechanism model, and interacts with them through a joint simulation interface of the multibody dynamics simulation model. The dynamics simulation model takes the output from the hydraulic operating mechanism model as input and uses the output as input to the hydraulic operating mechanism model, thereby enabling the two models to influence each other and perform joint simulation. This allows for the coupling of mechanical and hydraulic systems and fully considers the nonlinear relationship of the linkage in the dynamics simulation model, thus improving the accuracy and reliability of analyzing the influence of hydraulic cylinder structural parameters on the opening and closing characteristics of the circuit breaker's operating mechanism during the simulation process.

[0012] Furthermore, the first influence result is imported into the multibody dynamics simulation model for mechanical analysis to obtain the motion parameters of the circuit breaker moving contact. Based on the motion parameters, the second influence result of the hydraulic cylinder structural parameters on the opening and closing characteristics of the circuit breaker's operating mechanism is obtained, including:

[0013] The first influence result of the simulation model of the hydraulic operating mechanism is imported into the multibody dynamics simulation model to obtain motion parameters including the moving speed and collision force of the circuit breaker moving contact;

[0014] Based on the motion parameters and the force signal of the hydraulic operating mechanism simulation model obtained from the co-simulation interface, the second influence result of the hydraulic cylinder rod diameter parameter and hydraulic cylinder inner diameter parameter on the opening and closing speed of the circuit breaker operating mechanism is obtained.

[0015] This invention analyzes the opening and closing speed of the circuit breaker's operating mechanism based on the rod diameter parameters and inner diameter parameters of the hydraulic cylinder, according to the hydraulic cylinder's structural parameters. By indirectly influencing the opening and closing speed of the circuit breaker's operating mechanism under the hydraulic operating mechanism model, the nonlinear relationship of the connecting rod in the dynamic simulation model can be obtained, thereby improving the accuracy and reliability of analyzing the influence of the hydraulic cylinder's structural parameters on the opening and closing characteristics of the circuit breaker's operating mechanism during the simulation process.

[0016] Furthermore, the establishment of a multibody dynamics simulation model based on the three-dimensional model of the circuit breaker and the corresponding transmission relationship constraints includes:

[0017] The three-dimensional model of the circuit breaker was imported into the multibody dynamics simulation software. Based on the constraints of the actual transmission relationship, the return of the arc generated by the moving contact of the circuit breaker during the arc extinguishing process, and the resistance of gas compression, a joint simulation interface was set up to establish a multibody dynamics simulation model.

[0018] The constraints include: rotational constraints between links, fixed constraints between links and the ground, and collision constraints between moving and stationary contacts.

[0019] This invention not only takes into account the constraints of the actual transmission relationship, but also the backflow of the electric arc generated during the arc extinguishing process of the circuit breaker moving contact and the resistance of gas compression, thereby improving the accuracy and reliability of the simulation analysis of the influence of the hydraulic cylinder structural parameters on the opening and closing characteristics of the circuit breaker operating mechanism.

[0020] Furthermore, based on the data obtained through interaction, a coupling analysis is performed on the simulation model of the hydraulic operating mechanism to obtain the first influence results of each simulation parameter of the hydraulic operating mechanism simulation model on the characteristics of the disc spring operating mechanism, including:

[0021] Based on the displacement and velocity of the connecting rod in the multibody dynamics simulation model obtained from the co-simulation interface, the pressure of the disc spring accumulator, the simulation parameters of the hydraulic cylinder, and the simulation parameters of the valve structure in the hydraulic operating mechanism simulation model are adjusted by variable parameters to obtain the first influence result on the characteristics of the disc spring operating mechanism in the hydraulic operating mechanism simulation model; wherein, the hydraulic operating mechanism simulation model includes: a disc spring accumulator, a solenoid valve, and a hydraulic cylinder, and the valve structure includes: a main valve and a solenoid valve.

[0022] Furthermore, the step of establishing a simulation model of the hydraulic operating mechanism based on the three-dimensional model of the hydraulic operating mechanism includes:

[0023] Based on the three-dimensional model and physical principles of the hydraulic operating mechanism, simulation models of the disc spring accumulator, solenoid valve, main valve and hydraulic cylinder are established on the simulation platform, and the corresponding simulation models are connected to obtain the simulation model of the hydraulic operating mechanism.

[0024] The input to the hydraulic operating mechanism simulation model is the displacement and velocity of the connecting rod output by the multibody dynamics simulation model, and the output of the hydraulic operating mechanism simulation model is the force signal of the moving contact.

[0025] Furthermore, the simulation models of the disc spring accumulator, solenoid valve, main valve, and hydraulic cylinder are established on the simulation platform, including:

[0026] Based on the analysis of the static characteristics of the solenoid valve, a three-dimensional data table showing the variation of inductance with ampere-turns and air gap, and a three-dimensional data table showing the variation of output force with ampere-turns and air gap are obtained. The three-dimensional data tables are then imported into the simulation model of the hydraulic operating mechanism to obtain the simulation model of the solenoid valve.

[0027] Furthermore, the step of establishing simulation models of the disc spring accumulator, solenoid valve, main valve, and hydraulic cylinder on the simulation platform also includes:

[0028] Set the simulation parameters corresponding to the simulation models of the disc spring energy storage device, the main valve, and the hydraulic cylinder;

[0029] The simulation parameters include: the relationship between the elastic force and displacement of the disc spring energy storage device; the valve core mass, valve port diameter, maximum valve core stroke, flow area, valve core rod diameter, and friction force of the main valve; the inner diameter, stroke, rod diameter of the rod chamber, load force, equivalent mass, dead volume of the rod chamber and dead volume of the rodless chamber of the hydraulic cylinder; and the density, bulk modulus of elasticity, and viscosity of the hydraulic oil in the hydraulic cylinder.

[0030] Secondly, the present invention also provides a circuit breaker virtual prototype simulation system, comprising:

[0031] The multibody dynamics simulation model module is used to establish a multibody dynamics simulation model based on the three-dimensional model of the circuit breaker and the constraints of the corresponding transmission relationship; wherein, the multibody dynamics simulation model is provided with a co-simulation interface;

[0032] An interaction module is used to exchange data between the multibody dynamics simulation model and the hydraulic operating mechanism simulation model according to the co-simulation interface, so that the output of the hydraulic operating mechanism simulation model is used as the input of the multibody dynamics simulation model, and the output of the multibody dynamics simulation model is used as the input of the hydraulic operating mechanism simulation model; wherein, the hydraulic operating mechanism simulation model is established based on the three-dimensional model of the hydraulic operating mechanism;

[0033] The coupling analysis module is used to perform coupling analysis on the simulation model of the hydraulic operating mechanism based on the data obtained from the interaction, and to obtain the first influence results of each simulation parameter of the hydraulic operating mechanism simulation model on the characteristics of the disc spring operating mechanism.

[0034] The mechanical analysis module is used to import the first influence result into the multibody dynamics simulation model for mechanical analysis, obtain the motion parameters of the circuit breaker moving contact, and obtain the second influence result of the hydraulic cylinder structural parameters on the opening and closing characteristics of the circuit breaker's operating mechanism based on the motion parameters.

[0035] Thirdly, the present invention provides a computer device including a memory and a processor, the memory storing a computer program, which, when executed by the processor, causes the processor to perform the steps of the circuit breaker virtual prototype simulation method as described in the first aspect.

[0036] Fourthly, the present invention provides a computer-readable storage medium storing a computer program, which, when executed by a processor, causes the processor to perform the steps of the circuit breaker virtual prototype simulation method as described in the first aspect. Attached Figure Description

[0037] Figure 1 This is a flowchart illustrating the virtual prototype simulation method for circuit breakers provided in this embodiment of the invention.

[0038] Figure 2 This is a schematic diagram of a three-dimensional model of the hydraulic operating mechanism provided in an embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram of a hydraulic operating mechanism simulation model built in the AMESim simulation platform according to an embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram illustrating the variation of the opening and closing speed with the inner diameter parameter of the hydraulic cylinder provided in an embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram illustrating the variation of the opening and closing speed with the rod diameter parameter of the hydraulic cylinder's rod chamber, provided in an embodiment of the present invention.

[0042] Figure 6 This is a schematic diagram illustrating the data interaction process between the multibody dynamics simulation model and the hydraulic operating mechanism simulation model provided in this embodiment of the invention.

[0043] Figure 7 This is a schematic diagram of the structure of the circuit breaker virtual prototype simulation system provided in this embodiment of the invention. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] See Figure 1 This is a flowchart illustrating the virtual prototype simulation method for circuit breakers provided in this embodiment of the invention, including steps S11 to S14, specifically:

[0046] Step S11: Based on the three-dimensional model of the circuit breaker and the corresponding constraints of the transmission relationship, establish a multibody dynamics simulation model; wherein, the multibody dynamics simulation model is equipped with a co-simulation interface.

[0047] Specifically, the three-dimensional model of the circuit breaker is imported into the multibody dynamics simulation software. Based on the constraints of the actual transmission relationship, the return of the arc generated by the moving contact of the circuit breaker during the arc extinguishing process, and the resistance of gas compression, a joint simulation interface is set to establish a multibody dynamics simulation model. The constraints include: rotational constraints between the links, fixed constraints between the links and the ground, and collision constraints between the moving and stationary contacts.

[0048] This invention not only takes into account the constraints of the actual transmission relationship, but also the backflow of the electric arc generated during the arc extinguishing process of the circuit breaker moving contact and the resistance of gas compression, thereby improving the accuracy and reliability of the simulation analysis of the influence of the hydraulic cylinder structural parameters on the opening and closing characteristics of the circuit breaker operating mechanism.

[0049] It is worth noting that a multibody dynamics simulation model should be established in the Automatic Dynamic Analysis of Mechanical Systems (ADAS) simulation system. This model should include moving and stationary contacts and connecting rods, with appropriate constraints and material parameters applied. It should also include the reaction force generated by the electric arc during arc extinguishing and the resistance to gas compression on the moving contact, calculated theoretically. A co-simulation interface should be established, where the output of the multibody dynamics simulation model is the displacement and velocity of the directly connected connecting rods. The output should be exported as a .fum file, facilitating data exchange between the displacement and velocity and the hydraulic operating mechanism simulation model via the co-simulation interface.

[0050] Step S12: According to the co-simulation interface, the multibody dynamics simulation model and the hydraulic operating mechanism simulation model interact with each other, so that the output of the hydraulic operating mechanism simulation model is used as the input of the multibody dynamics simulation model, and the output of the multibody dynamics simulation model is used as the input of the hydraulic operating mechanism simulation model; wherein, the hydraulic operating mechanism simulation model is established based on the three-dimensional model of the hydraulic operating mechanism.

[0051] Specifically, establishing the simulation model of the hydraulic operating mechanism includes: based on the three-dimensional model of the hydraulic operating mechanism and physical principles, establishing simulation models of the disc spring accumulator, solenoid valve, main valve, and hydraulic cylinder on the simulation platform, and connecting the corresponding simulation models to obtain the hydraulic operating mechanism simulation model; wherein, the input of the hydraulic operating mechanism simulation model is the displacement and velocity of the connecting rod output by the multibody dynamics simulation model, and the output of the hydraulic operating mechanism simulation model is the force signal of the moving contact.

[0052] Specifically, the output of the multibody dynamics simulation model is received as the input of the hydraulic operating mechanism simulation model through the co-simulation interface. That is, the .fmu file of the multibody dynamics simulation model is imported through the co-simulation interface. After configuring the component models and simulation parameters of the hydraulic operating mechanism simulation model, the co-simulation is performed using AMESim as the main control software, and the force signal is output so that the force signal is used as the input of the multibody dynamics simulation model through the co-simulation interface.

[0053] It is worth noting that a simulation model of the hydraulic operating mechanism is established based on the Advanced Modeling Environment for Performing Simulation of Engineering Systems (AMESim), a multidisciplinary complex system modeling and simulation platform. Through a co-simulation interface, the multibody dynamics simulation model and the hydraulic operating mechanism simulation model interact to achieve data exchange. This allows the force signals output from the AMESim-based hydraulic operating mechanism simulation model to be used as input to the AMESim-based multibody dynamics simulation model, and the displacement and velocity of the connecting rods output from the multibody dynamics simulation model to be used as input to the hydraulic operating mechanism simulation model. This enables the simulation of the AMESim-based hydraulic operating mechanism simulation model to obtain nonlinear link transmission, and the co-simulation interface to achieve the coupling calculation of mechanical and hydraulic systems. This allows for real-time reflection of the load magnitude of the hydraulic operating system at various moments, improving the accuracy of research on the characteristics of the high-voltage circuit breaker's hydraulic operating mechanism.

[0054] See Figure 2This is a schematic diagram of a three-dimensional model of a hydraulic operating mechanism provided in an embodiment of the present invention, including: a piston rod 1, high-pressure oil 2, an energy storage piston 3, low-pressure oil 4, a closing solenoid valve 5, a opening solenoid valve 6, a hydraulic cylinder 7, and a disc spring 8. According to... Figure 3 The 3D model of the hydraulic operating mechanism, a simulation model of the hydraulic operating mechanism built in the AMESim simulation platform, is shown below. Figure 3 This is a schematic diagram of a hydraulic operating mechanism simulation model built in the AMESim simulation platform provided in an embodiment of the present invention, including: a co-simulation interface 9, a hydraulic cylinder model 10, a buffer model 11, a main valve model 12, a closing solenoid valve model 13, and a opening solenoid valve model 14.

[0055] Simulation models of the disc spring accumulator, solenoid valve, main valve, and hydraulic cylinder are established on the simulation platform. This includes: based on the analysis of the static characteristics of the solenoid valve, obtaining three-dimensional data tables showing the changes in inductance with ampere-turns and air gap, and three-dimensional data tables showing the changes in output force with ampere-turns and air gap. These three-dimensional data tables are then imported into the simulation model of the hydraulic operating mechanism to obtain the simulation model of the solenoid valve. Specifically, the static characteristics of the solenoid valve, namely the relationship between inductance and air gap size, and the relationship between output force and air gap size, are analyzed using the electromagnetic field analysis software Ansoft Maxwell. This generates three-dimensional data tables showing the changes in inductance and air gap, and the changes in output force with ampere-turns and air gap, which are then imported into the ELMT module in AMESim to generate the simulation model of the solenoid valve.

[0056] Furthermore, simulation parameters are set for the simulation models of the disc spring accumulator, the main valve, and the hydraulic cylinder. These simulation parameters include: the relationship between the spring force and displacement of the disc spring accumulator; the valve core mass, valve port diameter, maximum valve core stroke, flow area, valve core rod diameter, and friction force of the main valve; the inner diameter, stroke, rod diameter of the rod chamber, load force, equivalent mass, dead volume of the rod chamber, and dead volume of the rodless chamber of the hydraulic cylinder; and the density, bulk modulus, and viscosity of the hydraulic oil in the hydraulic cylinder. Specifically, simulation models are built using the HCD (Hydraulic Component Design) library in AMESim, based on the principles of each component—the disc spring accumulator, the main valve, and the hydraulic cylinder. Corresponding simulation parameters are set based on the physical models of the 3D hydraulic operating mechanism, and the various components are connected.

[0057] Step S13: Based on the data obtained from the interaction, perform a coupling analysis on the simulation model of the hydraulic operating mechanism to obtain the first influence result of each simulation parameter of the simulation model of the hydraulic operating mechanism on the characteristics of the disc spring operating mechanism.

[0058] Specifically, based on the displacement and velocity of the connecting rod in the multibody dynamics simulation model obtained from the co-simulation interface, the pressure of the disc spring accumulator, the simulation parameters of the hydraulic cylinder, and the simulation parameters of the valve structure in the hydraulic operating mechanism simulation model are adjusted by variable parameters to obtain the first influence result on the characteristics of the disc spring operating mechanism in the hydraulic operating mechanism simulation model; wherein, the hydraulic operating mechanism simulation model includes: a disc spring accumulator, a solenoid valve, and a hydraulic cylinder, and the valve structure includes: a main valve and a solenoid valve.

[0059] Specifically, AMESim was used as the main control software for coupled analysis. The influence of the simulation parameters of each component on the characteristics of the disc spring operating mechanism was analyzed by varying the parameters, including adjusting the disc spring pressure, hydraulic cylinder structural parameters, or valve structural parameters to obtain the corresponding changes in simulation parameters, including valve core movement speed and pressure. The results were exported as .req, .gra, and .res files so that they could be imported into the multibody dynamics simulation model for mechanical analysis.

[0060] Step S14: Import the first influence result into the multibody dynamics simulation model for mechanical analysis to obtain the motion parameters of the circuit breaker moving contact. Based on the motion parameters, obtain the second influence result of the hydraulic cylinder structural parameters on the opening and closing characteristics of the circuit breaker's operating mechanism.

[0061] Specifically, the first influence result of the simulation model of the hydraulic operating mechanism is imported into the multibody dynamics simulation model to obtain motion parameters including the moving speed and collision force of the circuit breaker moving contact; based on the motion parameters and the force signal of the simulation model of the hydraulic operating mechanism obtained from the co-simulation interface, the second influence result of the rod diameter parameter of the hydraulic cylinder and the inner diameter parameter of the hydraulic cylinder on the opening and closing speed of the circuit breaker operating mechanism is obtained.

[0062] It is worth noting that data interaction between the multibody dynamics model and the hydraulic operating mechanism simulation model was achieved through a co-simulation interface. In the multibody dynamics model built in Adams, the influence results exported from the AMESim simulation system were imported into Adams / postprocessor to analyze the movement speed and collision force of the circuit breaker moving contact, and to obtain the movement speed, closing and opening times of the moving contact. Furthermore, the parameters of the hydraulic cylinder in the simulation model built in AMESim were adjusted, and data interaction was performed through the co-simulation interface. The influence of the rod diameter parameters of the hydraulic cylinder rod chamber and the inner diameter parameters of the hydraulic cylinder on the opening and closing characteristics of the operating mechanism was analyzed by parameter variation, and the second influence result was obtained.

[0063] See Figure 4The diagrams below illustrate the variation of the opening and closing speeds with the hydraulic cylinder inner diameter parameter according to embodiments of the present invention. (a) shows the opening speed as the hydraulic cylinder inner diameter parameter increases, initially increasing and then decreasing. Therefore, a balance needs to be struck between the hydraulic cylinder inner diameter parameter and the opening speed. An excessively large hydraulic cylinder inner diameter parameter can lead to a lower opening speed, while an excessively small parameter will also result in an unoptimal opening speed. (b) shows the closing speed as the hydraulic cylinder inner diameter parameter increases, decreasing accordingly. See also... Figure 5 The figures below are schematic diagrams illustrating the variation of opening and closing speeds with the rod diameter parameter of the hydraulic cylinder's rod chamber, as provided in the embodiments of the present invention. (a) shows the variation of opening speed with the rod diameter parameter of the hydraulic cylinder's rod chamber, where the opening speed decreases as the rod diameter parameter of the hydraulic cylinder increases. (b) shows the variation of closing speed with the rod diameter parameter of the hydraulic cylinder's rod chamber, where the closing speed decreases as the rod diameter parameter of the hydraulic cylinder increases. Thus, under the same simulation parameters, the opening and closing speeds exhibit completely opposite trends as the rod diameter of the hydraulic cylinder's rod chamber increases. Therefore, it is necessary to coordinate the opening and closing speeds to achieve optimal overall performance.

[0064] This invention analyzes the opening and closing speed of the circuit breaker's operating mechanism based on the rod diameter parameters and inner diameter parameters of the hydraulic cylinder, according to the hydraulic cylinder's structural parameters. By indirectly influencing the opening and closing speed of the circuit breaker's operating mechanism under the hydraulic operating mechanism model, the nonlinear relationship of the connecting rod in the dynamic simulation model can be obtained, thereby improving the accuracy and reliability of analyzing the influence of the hydraulic cylinder's structural parameters on the opening and closing characteristics of the circuit breaker's operating mechanism during the simulation process.

[0065] See Figure 6This is a schematic diagram illustrating the data interaction process between the multibody dynamics simulation model and the hydraulic operating mechanism simulation model provided in this embodiment of the invention. Specifically, a 3D model of the circuit breaker is established and imported into Adams to create a multibody dynamics simulation model, setting its inputs and outputs. A hydraulic operating mechanism simulation model is then created in AMESim, with each component model and its corresponding parameters set. The inputs and outputs of the hydraulic operating mechanism simulation model are also set. Using the co-simulation interface of the multibody dynamics simulation model, data exchange is performed between the inputs and outputs of the multibody dynamics simulation model and the hydraulic operating mechanism simulation model. The force signal output from the hydraulic operating mechanism simulation model is used as the input to the multibody dynamics simulation model, and the displacement and velocity of the connecting rod output from the multibody dynamics simulation model are used as the input to the hydraulic operating mechanism simulation model. Coupled analysis is performed in the hydraulic operating mechanism simulation model to obtain the influence results of each simulation parameter on the characteristics of the disc spring operating mechanism. The first influence result is imported into the multibody dynamics simulation model, where mechanical analysis is performed to obtain the motion parameters of the circuit breaker's moving contact. Based on these motion parameters, the influence results of the hydraulic cylinder structural parameters on the circuit breaker's operating mechanism's opening and closing switching characteristics are obtained.

[0066] See Figure 7 This is a schematic diagram of the structure of the circuit breaker virtual prototype simulation system provided in the embodiment of the present invention, including: multibody dynamics simulation model module 21, interaction module 22, hydraulic operating mechanism simulation model module 23, coupling analysis module 24, and mechanical analysis module 25.

[0067] The multibody dynamics simulation model module 21 is used to establish a multibody dynamics simulation model based on the three-dimensional model of the circuit breaker and the constraints of the corresponding transmission relationship; wherein, the multibody dynamics simulation model is provided with a co-simulation interface.

[0068] Specifically, the three-dimensional model of the circuit breaker is imported into the multibody dynamics simulation software. Based on the constraints of the actual transmission relationship, the return of the arc generated by the moving contact of the circuit breaker during the arc extinguishing process, and the resistance of gas compression, a joint simulation interface is set to establish a multibody dynamics simulation model. The constraints include: rotational constraints between the links, fixed constraints between the links and the ground, and collision constraints between the moving and stationary contacts.

[0069] It is worth noting that the multibody dynamics simulation model module 21 mainly generates a multibody dynamics simulation model based on the three-dimensional model of the short circuit device and the constraints of the transmission relationship, and sets up a joint simulation interface, corresponding inputs and outputs, so as to enable data interaction with the hydraulic operating mechanism simulation model through the interaction module 22.

[0070] The interaction module 22 is used to perform data interaction between the multibody dynamics simulation model and the hydraulic operating mechanism simulation model according to the co-simulation interface, so that the output of the hydraulic operating mechanism simulation model is used as the input of the multibody dynamics simulation model, and the output of the multibody dynamics simulation model is used as the input of the hydraulic operating mechanism simulation model; wherein, the hydraulic operating mechanism simulation model is established based on the three-dimensional model of the hydraulic operating mechanism.

[0071] It is worth noting that the interaction module 22 is mainly used to exchange data with the multibody dynamics simulation model module 21. Specifically, it exchanges data with the input and output of the multibody dynamics simulation model module 21 and the output and input of the hydraulic operating mechanism simulation model module 23 to obtain a joint simulation model.

[0072] The hydraulic operating mechanism simulation model module 23 is used to establish a hydraulic operating mechanism simulation model based on the three-dimensional model of the hydraulic operating mechanism. The hydraulic operating mechanism simulation model module 23 mainly performs simulation modeling based on the three-dimensional model of the hydraulic operating mechanism, and realizes data interaction with the multibody dynamics simulation model module 21 through the interaction module 22.

[0073] Specifically, establishing the simulation model of the hydraulic operating mechanism includes: based on the three-dimensional model of the hydraulic operating mechanism and physical principles, establishing simulation models of the disc spring accumulator, solenoid valve, main valve, and hydraulic cylinder on the simulation platform, and connecting the corresponding simulation models to obtain the hydraulic operating mechanism simulation model; wherein, the input of the hydraulic operating mechanism simulation model is the displacement and velocity of the connecting rod output by the multibody dynamics simulation model, and the output of the hydraulic operating mechanism simulation model is the force signal of the moving contact.

[0074] Simulation models of the disc spring accumulator, solenoid valve, main valve, and hydraulic cylinder are established on the simulation platform. This includes: based on the analysis of the static characteristics of the solenoid valve, obtaining three-dimensional data tables showing the changes in inductance with ampere-turns and air gap, and three-dimensional data tables showing the changes in output force with ampere-turns and air gap; importing these three-dimensional data tables into the simulation model of the hydraulic operating mechanism to obtain the simulation model of the solenoid valve. Simulation parameters are set for the simulation models of the disc spring accumulator, the main valve, and the hydraulic cylinder. These simulation parameters include: the relationship between the spring force and displacement of the disc spring accumulator; the valve core mass, valve port diameter, maximum valve core stroke, flow area, valve core rod diameter, and friction force of the main valve; the inner diameter, stroke, rod diameter of the rod chamber, load force, equivalent mass, dead volume of the rod chamber, and dead volume of the rodless chamber of the hydraulic cylinder; and the density, bulk modulus, and viscosity of the hydraulic oil in the hydraulic cylinder.

[0075] The coupling analysis module 24 is used to perform coupling analysis on the simulation model of the hydraulic operating mechanism based on the data obtained from the interaction, and to obtain the first influence results of each simulation parameter of the simulation model of the hydraulic operating mechanism on the characteristics of the disc spring operating mechanism.

[0076] Specifically, based on the displacement and velocity of the connecting rod in the multibody dynamics simulation model obtained from the co-simulation interface, the pressure of the disc spring accumulator, the simulation parameters of the hydraulic cylinder, and the simulation parameters of the valve structure in the hydraulic operating mechanism simulation model are adjusted by variable parameters to obtain the first influence result on the characteristics of the disc spring operating mechanism in the hydraulic operating mechanism simulation model; wherein, the hydraulic operating mechanism simulation model includes: a disc spring accumulator, a solenoid valve, and a hydraulic cylinder, and the valve structure includes: a main valve and a solenoid valve.

[0077] It is worth noting that the coupling analysis module 24 adjusts the simulation parameters of the internal components by the hydraulic operating mechanism simulation model module 23. After the coupling analysis by the hydraulic operating mechanism simulation model module 23, the first influence result of each simulation parameter of the hydraulic operating mechanism simulation model on the characteristics of the disc spring operating mechanism is obtained, so as to be exported to the multibody dynamics simulation model module 21 to obtain the second influence result of the hydraulic cylinder structural parameters on the opening and closing switch characteristics of the circuit breaker operating mechanism.

[0078] The mechanical analysis module 25 is used to import the first influence result into the multibody dynamics simulation model for mechanical analysis, obtain the motion parameters of the circuit breaker moving contact, and obtain the second influence result of the hydraulic cylinder structural parameters on the opening and closing characteristics of the circuit breaker's operating mechanism based on the motion parameters.

[0079] Specifically, the first influence result of the simulation model of the hydraulic operating mechanism is imported into the multibody dynamics simulation model to obtain motion parameters including the moving speed and collision force of the circuit breaker moving contact; based on the motion parameters and the force signal of the simulation model of the hydraulic operating mechanism obtained from the co-simulation interface, the second influence result of the rod diameter parameter of the hydraulic cylinder and the inner diameter parameter of the hydraulic cylinder on the opening and closing speed of the circuit breaker operating mechanism is obtained.

[0080] It is worth noting that the mechanical analysis module 25 mainly performs simulation mechanical analysis based on the multibody dynamics simulation model module 21 to obtain the motion parameters of the circuit breaker moving contact. Based on the joint simulation model, that is, through the interaction module 22 and the hydraulic operating mechanism simulation model module 23, it obtains the second influence result of the hydraulic cylinder structural parameters on the opening and closing switch characteristics of the circuit breaker operating mechanism.

[0081] This invention analyzes the opening and closing speed of the circuit breaker's operating mechanism based on the rod diameter parameters and inner diameter parameters of the hydraulic cylinder, according to the hydraulic cylinder's structural parameters. By indirectly influencing the opening and closing speed of the circuit breaker's operating mechanism under the hydraulic operating mechanism model, the nonlinear relationship of the connecting rod in the dynamic simulation model can be obtained, thereby improving the accuracy and reliability of analyzing the influence of the hydraulic cylinder's structural parameters on the opening and closing characteristics of the circuit breaker's operating mechanism during the simulation process.

[0082] This invention also provides a computer device, including a memory and a processor. The memory stores a computer program, which, when executed by the processor, causes the processor to perform steps as described in the circuit breaker virtual prototype simulation method.

[0083] The present invention provides a computer-readable storage medium storing a computer program, which, when executed by a processor, causes the processor to perform the steps of the circuit breaker virtual prototype simulation method.

[0084] This invention constructs a multibody dynamics simulation model and a hydraulic operating mechanism model, and interacts with them through a joint simulation interface of the multibody dynamics simulation model. The dynamics simulation model takes the output from the hydraulic operating mechanism model as input and uses the output as input to the hydraulic operating mechanism model, thereby enabling the two models to influence each other and perform joint simulation. This allows for the coupling of mechanical and hydraulic systems and fully considers the nonlinear relationship of the linkage in the dynamics simulation model, thus improving the accuracy and reliability of analyzing the influence of hydraulic cylinder structural parameters on the opening and closing characteristics of the circuit breaker's operating mechanism during the simulation process.

[0085] Those skilled in the art will understand that embodiments of this application may also include computer program products. Therefore, this application may take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0086] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0087] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0088] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0089] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A circuit breaker construction virtual prototyping simulation method, characterized by, The application relates to a method for analyzing the influence of a hydraulic operating mechanism on a circuit breaker, and belongs to the field of circuit breaker research. According to the constraint condition of the three-dimensional model of the circuit breaker and the corresponding transmission relationship, a multi-body dynamics simulation model is established; wherein the multi-body dynamics simulation model is provided with a joint simulation interface; According to the joint simulation interface, the multi-body dynamics simulation model and the hydraulic operating mechanism simulation model are interacted with data, so that the output of the hydraulic operating mechanism simulation model is used as the input of the multi-body dynamics simulation model, and the output of the multi-body dynamics simulation model is used as the input of the hydraulic operating mechanism simulation model; wherein the hydraulic operating mechanism simulation model is established according to a three-dimensional model of the hydraulic operating mechanism; According to the obtained data, coupling analysis is carried out on the hydraulic operating mechanism simulation model, so that a first influence result of each simulation parameter of the hydraulic operating mechanism simulation model on the disc spring operating mechanism characteristic is obtained; The first influence result is introduced into the multi-body dynamics simulation model for mechanical analysis, so that the motion parameter of the circuit breaker moving contact is obtained, and a second influence result of the hydraulic cylinder structure parameter on the switching characteristic of the circuit breaker operating mechanism is obtained according to the motion parameter; The first influence result of the hydraulic operating mechanism simulation model is introduced into the multi-body dynamics simulation model, so that the motion parameter containing the motion speed and the collision force of the circuit breaker moving contact is obtained; According to the motion parameter and the force signal of the hydraulic operating mechanism simulation model obtained from the joint simulation interface, a second influence result of the rod diameter parameter of the rod cavity of the hydraulic cylinder and the inner diameter parameter of the hydraulic cylinder on the circuit breaker operating mechanism opening and closing speed is obtained; According to the three-dimensional model of the hydraulic operating mechanism, the hydraulic operating mechanism simulation model is established, including: According to the three-dimensional model of the hydraulic operating mechanism and physical principles, simulation models of a disc spring energy accumulator, a solenoid valve, a main valve and a hydraulic cylinder are respectively established on a simulation platform, and corresponding simulation models are connected to obtain the hydraulic operating mechanism simulation model; Wherein the input of the hydraulic operating mechanism simulation model is the displacement and speed of the connecting rod output by the multi-body dynamics simulation model, and the output of the hydraulic operating mechanism simulation model is the force signal of the moving contact. According to the constraint condition of the three-dimensional model of the circuit breaker and the corresponding transmission relationship, the multi-body dynamics simulation model is established, including:

2. The circuit breaker construction virtual prototyping simulation method of claim 1, wherein, The three-dimensional model of the circuit breaker is introduced into a multi-body dynamics simulation software, and a joint simulation interface is set according to the constraint condition of the actual transmission relationship, the back benefit of the arc generated in the arc extinguishing process of the circuit breaker moving contact and the resistance of the gas compression, so that the multi-body dynamics simulation model is established; Wherein the constraint condition includes the rotation constraint between the connecting rods, the fixed constraint between the connecting rods and the ground and the collision constraint between the moving and static contacts. ​ 3. The circuit breaker construction virtual prototyping simulation method of claim 1, wherein, The data obtained through the interaction is coupled into the hydraulic operating mechanism simulation model to obtain first influence results of each simulation parameter of the hydraulic operating mechanism simulation model on the disc spring operating mechanism characteristics, including: According to the displacement and velocity of the connecting rod of the multi-body dynamics simulation model obtained from the co-simulation interface, the pressure of the disc spring accumulator, the simulation parameters of the hydraulic cylinder and the simulation parameters of the valve structure of the hydraulic operating mechanism simulation model are adjusted to obtain the first influence results of the disc spring operating mechanism characteristics of the hydraulic operating mechanism simulation model; wherein the hydraulic operating mechanism simulation model comprises a disc spring accumulator, an electromagnetic valve and a hydraulic cylinder, and the valve structure comprises a main valve and an electromagnetic valve.

4. The circuit breaker construction virtual prototyping simulation method of claim 1, wherein, The simulation models of the disc spring accumulator, the electromagnetic valve, the main valve and the hydraulic cylinder are respectively established on the simulation platform, including: According to the analysis of the static characteristics of the electromagnetic valve, a three-dimensional data table of inductance changing with ampere turns and air gap and a three-dimensional data table of output force changing with ampere turns and air gap are obtained, and the three-dimensional data tables are imported into the hydraulic operating mechanism simulation model to obtain the simulation model of the electromagnetic valve.

5. The circuit breaker construction virtual prototyping simulation method of claim 1, wherein, The simulation models of the disc spring accumulator, the electromagnetic valve, the main valve and the hydraulic cylinder are respectively established on the simulation platform, including: The simulation parameters corresponding to the simulation models of the disc spring accumulator, the main valve and the hydraulic cylinder are set; The simulation parameters include the spring force and displacement relationship of the disc spring accumulator, the valve core mass, the valve port diameter, the maximum stroke of the valve core, the flow area, the valve core rod diameter, the friction force of the main valve, the inner diameter, the stroke, the rod diameter of the rod cavity, the load force, the equivalent mass, the dead volume of the rod cavity and the dead volume of the rod cavity of the hydraulic cylinder, and the density, the bulk modulus of elasticity and the viscosity of the hydraulic oil of the hydraulic cylinder.

6. A circuit breaker construction virtual prototyping simulation system, characterized by, Including: The multi-body dynamics simulation model module is used to establish a multi-body dynamics simulation model according to a three-dimensional model of the circuit breaker and constraint conditions of corresponding transmission relationships; wherein the multi-body dynamics simulation model is provided with a co-simulation interface; The interaction module is used to perform data interaction between the multi-body dynamics simulation model and the hydraulic operating mechanism simulation model according to the co-simulation interface, so that the output of the hydraulic operating mechanism simulation model is used as the input of the multi-body dynamics simulation model, and the output of the multi-body dynamics simulation model is used as the input of the hydraulic operating mechanism simulation model; The hydraulic operating mechanism simulation model module is used to establish a hydraulic operating mechanism simulation model according to a three-dimensional model of the hydraulic operating mechanism; The coupling analysis module is used to perform coupling analysis on the hydraulic operating mechanism simulation model according to the data obtained through the interaction to obtain first influence results of each simulation parameter of the hydraulic operating mechanism simulation model on the disc spring operating mechanism characteristics; The mechanical analysis module is used to import the first influence results into the multi-body dynamics simulation model to perform mechanical analysis to obtain movement parameters of the moving contact of the circuit breaker, and to obtain second influence results of the hydraulic cylinder structure parameters on the operating mechanism switching characteristics of the circuit breaker according to the movement parameters; The first influence result is introduced into the multi-body dynamics simulation model for mechanical analysis to obtain a motion parameter of the moving contact of the circuit breaker, and according to the motion parameter, a second influence result of the structure parameters of the hydraulic cylinder on the switching characteristics of the operating mechanism of the circuit breaker is obtained. The first influence result of the hydraulic operating mechanism simulation model is introduced into the multi-body dynamics simulation model to obtain a motion parameter including a motion speed and a collision force of the moving contact of the circuit breaker; According to the motion parameter and the force signal of the hydraulic operating mechanism simulation model obtained from the joint simulation interface, a second influence result of the rod diameter parameter of the rod cavity of the hydraulic cylinder and the inner diameter parameter of the hydraulic cylinder on the opening and closing speed of the operating mechanism of the circuit breaker is obtained. The hydraulic operating mechanism simulation model is established according to the three-dimensional model of the hydraulic operating mechanism, including: According to the three-dimensional model of the hydraulic operating mechanism and physical principles, simulation models of the disc spring energy accumulator, the electromagnetic valve, the main valve and the hydraulic cylinder are respectively established on a simulation platform, and the corresponding simulation models are connected to obtain the hydraulic operating mechanism simulation model. The input of the hydraulic operating mechanism simulation model is the displacement and speed of the connecting rod output by the multi-body dynamics simulation model, and the output of the hydraulic operating mechanism simulation model is the force signal of the moving contact.

7. A computer device, comprising: The memory stores a computer program, and the computer program is executed by the processor to make the processor execute the steps of the circuit breaker virtual prototype simulation method according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, The memory stores a computer program, and the computer program is executed by the processor to make the processor execute the steps of the circuit breaker virtual prototype simulation method according to any one of claims 1 to 5.

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