Circuit breaker opening time determination method and device, computer equipment, readable storage medium and program product

Abstract

The application relates to a circuit breaker opening time determination method and device, computer equipment, a readable storage medium and a program product. The method comprises the following steps: obtaining a control resultant force by using an electromagnetic repulsive force simulation component according to an initial air gap size of an electromagnetic repulsive force simulation model at a current time step, and sending the control resultant force to a circuit breaker operating simulation component; obtaining an air gap size generated by taking the control resultant force as a load force of a circuit breaker operating simulation model at the current time step by using the circuit breaker operating simulation component; in the case that it is detected that a repulsive force disc does not reach a preset position, sending the air gap size to the electromagnetic repulsive force simulation component, updating a next time step to the current time step, and returning to a resultant force updating step until the repulsive force disc reaches the preset position; and taking the current time step when the repulsive force disc reaches the preset position as the opening time. The method can accurately determine the circuit breaker opening time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automatic control, in particular to a circuit breaker opening time determination method and device, computer equipment, computer readable storage medium and computer program product. BACKGROUND

[0002] The circuit breaker is a kind of switch device for automatically cutting off the circuit to avoid the damage of electrical equipment and line caused by overload, short circuit and other faults, which is often used in power system to close, carry and open the current under normal or abnormal circuit conditions, and the full breaking time of the circuit breaker is composed of opening time and arc time, therefore, the determination of the opening time of the circuit breaker is a technology that needs attention for those skilled in the art.

[0003] At present, the determination of the opening time of the circuit breaker is generally realized by manual or timer recording, that is, the time interval from the moment when the main circuit current reaches the action value of the overcurrent release to the moment when all the arc contacts are separated.

[0004] However, the current circuit breaker opening time determination method has the problem of inaccuracy. SUMMARY

[0005] Therefore, it is necessary to provide an accurate circuit breaker opening time determination method, device, computer equipment, computer readable storage medium and computer program product in view of the above technical problems.

[0006] In a first aspect, the present application provides a circuit breaker opening time determination method, comprising:

[0007] In response to the opening operation of the circuit breaker, a pre-stored electromagnetic repulsion simulation model is loaded in the electromagnetic repulsion simulation component, and a pre-stored circuit breaker operating simulation model is loaded in the circuit breaker operating component, wherein the electromagnetic repulsion simulation model is a simulation model of the electromagnetic repulsion mechanism, the circuit breaker operating simulation model is a simulation model of the circuit breaker operating mechanism, and the opening operation is completed by the electromagnetic repulsion mechanism and the circuit breaker operating mechanism cooperatively controlling the air gap size between the repulsion disc and the opening coil in the electromagnetic repulsion mechanism;

[0008] A resultant force updating step: according to the pre-configured initial air gap size between the repulsion disc and the opening coil of the electromagnetic repulsion simulation model at the current time step, the electromagnetic repulsion simulation component is used to obtain the control resultant force generated by the electromagnetic repulsion simulation model based on the initial air gap size at the current time step, and the control resultant force is sent to the circuit breaker operating simulation component;

[0009] The circuit breaker operating simulation component is used to obtain the air gap size between the repulsion disc and the opening coil generated when the control resultant force is taken as the load force of the circuit breaker operating simulation model at the current time step.

[0010] in the case that the repulsion disc does not reach the preset position according to the air gap size, sending the air gap size to the electromagnetic repulsion simulation component, controlling the electromagnetic repulsion simulation component to take the air gap size as a new initial air gap size, updating a next time step to the current time step, and returning to the force updating step until the repulsion disc reaches the preset position;

[0011] taking the current time step when the repulsion disc reaches the preset position as the opening time of the circuit breaker.

[0012] In a second aspect, the present application further provides a circuit breaker opening time determination device, comprising:

[0013] a simulation model loading module, configured to load a pre-stored electromagnetic repulsion simulation model in the electromagnetic repulsion simulation component and a pre-stored circuit breaker operation simulation model in the circuit breaker operation component in response to a circuit breaker opening operation, wherein the electromagnetic repulsion simulation model is a simulation model of an electromagnetic repulsion mechanism, the circuit breaker operation simulation model is a simulation model of a circuit breaker operation mechanism, and the opening operation is completed by the electromagnetic repulsion mechanism and the circuit breaker operation mechanism cooperatively controlling an air gap size between a repulsion disc and an opening coil in the electromagnetic repulsion mechanism;

[0014] a control force updating module, configured to perform a force updating step: according to a preconfigured initial air gap size between the repulsion disc and the opening coil of the electromagnetic repulsion simulation model at the current time step, obtaining, by using the electromagnetic repulsion simulation component, a control force generated by the electromagnetic repulsion simulation model based on the initial air gap size at the current time step, and sending the control force to the circuit breaker operation simulation component;

[0015] an air gap size updating module, configured to obtain, by using the circuit breaker operation simulation component, an air gap size between the repulsion disc and the opening coil generated by taking the control force as a load force of the circuit breaker operation simulation model at the current time step;

[0016] an iteration module, configured to, in the case that the repulsion disc does not reach the preset position according to the air gap size, send the air gap size to the electromagnetic repulsion simulation component, control the electromagnetic repulsion simulation component to take the air gap size as a new initial air gap size, update a next time step to the current time step, and return to the force updating step until the repulsion disc reaches the preset position;

[0017] an opening time determination module, configured to take the current time step when the repulsion disc reaches the preset position as the opening time of the circuit breaker.

[0018] In a third aspect, the present application further provides a computer device, comprising a memory and a processor, the memory stores a computer program, and the processor implements the following steps when executing the computer program:

[0019] In response to the opening operation of the circuit breaker, a pre-stored electromagnetic repulsion simulation model is loaded in the electromagnetic repulsion simulation component, and a pre-stored circuit breaker operating simulation model is loaded in the circuit breaker operating component, wherein the electromagnetic repulsion simulation model is a simulation model of the electromagnetic repulsion mechanism, the circuit breaker operating simulation model is a simulation model of the circuit breaker operating mechanism, and the opening operation is completed by the electromagnetic repulsion mechanism and the circuit breaker operating mechanism cooperatively controlling the air gap size between the repulsion disc and the opening coil in the electromagnetic repulsion mechanism;

[0020] A force updating step: according to the pre-configured initial air gap size between the repulsion disc and the opening coil of the electromagnetic repulsion simulation model at the current time step, the electromagnetic repulsion simulation component is used to obtain the control force generated by the electromagnetic repulsion simulation model based on the initial air gap size at the current time step, and the control force is sent to the circuit breaker operating simulation component;

[0021] The circuit breaker operating simulation component is used to obtain the air gap size between the repulsion disc and the opening coil generated when the control force is taken as the load force of the circuit breaker operating simulation model at the current time step;

[0022] In the case where the repulsion disc does not reach the preset position according to the air gap size, the air gap size is sent to the electromagnetic repulsion simulation component, the electromagnetic repulsion simulation component takes the air gap size as a new initial air gap size, the next time step is updated to the current time step, and the force updating step is returned until the repulsion disc reaches the preset position;

[0023] The current time step when the repulsion disc reaches the preset position is taken as the opening time of the circuit breaker.

[0024] In a fourth aspect, the present application also provides a computer readable storage medium having a computer program stored thereon, wherein the computer program is executed by a processor to implement the following steps:

[0025] In response to the opening operation of the circuit breaker, a pre-stored electromagnetic repulsion simulation model is loaded in the electromagnetic repulsion simulation component, and a pre-stored circuit breaker operating simulation model is loaded in the circuit breaker operating component, wherein the electromagnetic repulsion simulation model is a simulation model of the electromagnetic repulsion mechanism, the circuit breaker operating simulation model is a simulation model of the circuit breaker operating mechanism, and the opening operation is completed by the electromagnetic repulsion mechanism and the circuit breaker operating mechanism cooperatively controlling the air gap size between the repulsion disc and the opening coil in the electromagnetic repulsion mechanism;

[0026] A force updating step: according to the pre-configured initial air gap size between the repulsion disc and the opening coil of the electromagnetic repulsion simulation model at the current time step, the electromagnetic repulsion simulation component is used to obtain the control force generated by the electromagnetic repulsion simulation model based on the initial air gap size at the current time step, and the control force is sent to the circuit breaker operating simulation component;

[0027] acquire, by the circuit breaker operating simulation component, the air gap size between the repulsion disc and the tripping coil generated by taking the control force as the load force of the circuit breaker operating simulation model at the current time step;

[0028] In a case where it is detected that the repulsion disc does not reach the preset position according to the air gap size, send the air gap size to the electromagnetic repulsion simulation component, control the electromagnetic repulsion simulation component to take the air gap size as a new initial air gap size, update the next time step to the current time step, and return to the force updating step until the repulsion disc reaches the preset position;

[0029] take the current time step when the repulsion disc reaches the preset position as the tripping time of the circuit breaker.

[0030] In a fifth aspect, the present application also provides a computer program product, comprising a computer program which, when executed by a processor, implements the following steps:

[0031] In response to a tripping operation of the circuit breaker, load the pre-stored electromagnetic repulsion simulation model in the electromagnetic repulsion simulation component, and load the pre-stored circuit breaker operating simulation model in the circuit breaker operating component, wherein the electromagnetic repulsion simulation model is a simulation model of the electromagnetic repulsion mechanism, the circuit breaker operating simulation model is a simulation model of the circuit breaker operating mechanism, and the tripping operation is completed by the electromagnetic repulsion mechanism and the circuit breaker operating mechanism cooperatively controlling the air gap size between the repulsion disc and the tripping coil in the electromagnetic repulsion mechanism;

[0032] force updating step: according to the pre-configured initial air gap size between the repulsion disc and the tripping coil of the electromagnetic repulsion simulation model at the current time step, acquire, by the electromagnetic repulsion simulation component, the control force generated by the electromagnetic repulsion simulation model based on the initial air gap size at the current time step, and send the control force to the circuit breaker operating simulation component;

[0033] acquire, by the circuit breaker operating simulation component, the air gap size between the repulsion disc and the tripping coil generated by taking the control force as the load force of the circuit breaker operating simulation model at the current time step;

[0034] In a case where it is detected that the repulsion disc does not reach the preset position according to the air gap size, send the air gap size to the electromagnetic repulsion simulation component, control the electromagnetic repulsion simulation component to take the air gap size as a new initial air gap size, update the next time step to the current time step, and return to the force updating step until the repulsion disc reaches the preset position;

[0035] take the current time step when the repulsion disc reaches the preset position as the tripping time of the circuit breaker.

[0036] The circuit breaker opening time determination method, device, computer equipment, computer readable storage medium and computer program product provided by the application, in response to the opening operation of the circuit breaker, the pre-stored electromagnetic repulsion simulation model is loaded in the electromagnetic repulsion simulation component, and the pre-stored circuit breaker operating simulation model is loaded in the circuit breaker operating component, so that the interaction between the electromagnetic repulsion simulation model and the circuit breaker operating simulation model is considered, the control resultant force generated by the electromagnetic repulsion simulation model and the air gap size generated by the circuit breaker operating simulation model at the current time step can be coupled and interacted in the two different models, and then the electromagnetic simulation of the electromagnetic repulsion simulation model and the hydraulic simulation of the circuit breaker operating simulation model are completed under the control of the same time step, the accuracy of the determination of the circuit breaker opening time is improved, finally, in the case that the air gap size is detected and the repulsion disc does not reach the preset position, in the case that the repulsion disc does not reach the preset position, the air gap size is updated to the initial air gap size, the next time step is updated to the current time step, and the force updating step is returned, until the repulsion disc reaches the preset position, and the current time step when the repulsion disc reaches the preset position is taken as the opening time of the circuit breaker simulation model. The coupling simulation method can more realistically simulate the behavior of the circuit breaker under actual working conditions, ensure the consistency between the simulation model and the actual situation, improve the credibility in the process of determining the circuit breaker opening time, and help to more accurately determine the circuit breaker opening time. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed to be used in the description of the embodiments of the present application or the related art will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other related drawings can be obtained by those skilled in the art without creating labor.

[0038] Figure 1 An application environment diagram of the circuit breaker opening time determination method in an embodiment;

[0039] Figure 2 A flowchart of the circuit breaker opening time determination method in an embodiment;

[0040] Figure 3 A structural diagram of the electromagnetic repulsion simulation model in an embodiment;

[0041] Figure 4 A flowchart of the circuit breaker opening time determination method in another embodiment;

[0042] Figure 5 A structural block diagram of the circuit breaker opening time determination device in an embodiment;

[0043] Figure 6 Fig. 1 is a schematic diagram of the internal structure of a computer device according to an embodiment. DETAILED DESCRIPTION

[0044] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are intended to explain the present application, and are not intended to limit the present application.

[0045] The existing circuit breaker opening time determination technology mostly ignores the interaction and influence of the circuit breaker operating mechanism and the electromagnetic repulsion mechanism. As a driving component of the circuit breaker, it has an important influence on the contact movement and switch action of the circuit breaker, and needs to be considered and embodied in the circuit breaker opening time determination technology. The movement characteristics of the circuit breaker operating mechanism will affect the contact movement law and switch action time of the circuit breaker, thereby affecting the formation and arc extinguishing time of the arc, and further affecting the arc extinguishing performance. The movement accuracy of the circuit breaker operating mechanism will affect the contact movement position and switch action synchronization of the circuit breaker, thereby affecting the distribution and uniformity of the arc, and further affecting the arc extinguishing performance. In the actual opening process of the circuit breaker, the electromagnetic repulsion mechanism and the circuit breaker operating mechanism will influence each other. The movement of the circuit breaker operating mechanism changes the air gap between the coil and the repulsion disc of the electromagnetic repulsion mechanism, changes the electromagnetic force, and further changes the movement characteristics of the circuit breaker operating mechanism. Therefore, when determining the opening time of the circuit breaker, the coupling and synergistic effect of the electromagnetic repulsion mechanism and the circuit breaker operating mechanism need to be considered, a dynamic coupling model of the circuit breaker operating mechanism and the electromagnetic repulsion mechanism is established, and the coordination and optimization of the two modules are realized. In order to improve the design accuracy of the circuit breaker, the present application provides a circuit breaker opening time determination method for real-time coupling of the circuit breaker electromagnetic repulsion mechanism and the circuit breaker operating mechanism. The method considers the mutual influence between the electromagnetic repulsion mechanism and the operating mechanism during the opening process of the circuit breaker, and designs a communication interface to enable the simulation models of the electromagnetic repulsion mechanism and the operating mechanism to dynamically transfer data and cooperatively simulate during simulation calculation. Through this coupled simulation, the opening start time of the circuit breaker can be more accurately evaluated, and the movement characteristics of the circuit breaker operating mechanism can be obtained.

[0046] The circuit breaker opening time determination method provided by the embodiments of the present application can be applied to the application environment as shown in Figure 1 The terminal 102 communicates with the relay router 104 through the network. The data storage system can store data required to be processed by the relay router 104. The relay router 104 is a UDP (User Datagram Protocol) communication script written by python.

[0047] Specifically, the electromagnetic repulsion simulation component 106 and the circuit breaker operating simulation component 108 are installed in the terminal 102, and the user establishes an electromagnetic repulsion simulation model in the electromagnetic repulsion simulation component 106 and establishes a circuit breaker operating simulation model in the circuit breaker operating simulation component 108. The electromagnetic repulsion simulation model is a simulation model of an electromagnetic repulsion mechanism, and the circuit breaker operating simulation model is a simulation model of a circuit breaker operating mechanism. The electromagnetic repulsion simulation model can be stored in the electromagnetic repulsion simulation component 106, and the circuit breaker operating simulation model can be stored in the circuit breaker operating simulation component 108. In actual application, the electromagnetic repulsion simulation component 106 can be Maxwell software, and the circuit breaker operating simulation component 108 can be a transmission dynamics simulation component, such as Amesim software.

[0048] When the user triggers a tripping operation of the circuit breaker in the terminal 102, the relay router 104 responds to the tripping operation of the circuit breaker simulation model, loads the pre-stored electromagnetic repulsion simulation model in the electromagnetic repulsion simulation component 106 and loads the pre-stored circuit breaker operating simulation model in the circuit breaker operating simulation component 108, acquires, by using the electromagnetic repulsion simulation component 106, a control resultant force generated by the electromagnetic repulsion simulation model based on the pre-configured initial air gap size between the repulsion disc and the tripping coil in the current time step, and sends the control resultant force to the circuit breaker operating simulation component 108; acquires, by using the circuit breaker operating simulation component 108, an air gap size between the repulsion disc and the tripping coil generated by the circuit breaker operating simulation model based on the control resultant force in the current time step; in the case where it is detected that the repulsion disc does not reach the preset position according to the air gap size, sends the air gap size to the electromagnetic repulsion simulation component 106, controls the electromagnetic repulsion simulation component 106 to update the air gap size to the initial air gap size, updates the next time step to the current time step, and returns to the resultant force updating step until the repulsion disc reaches the preset position; and takes the current time step when the repulsion disc reaches the preset position as the tripping time of the circuit breaker.

[0049] The terminal 102 can be, but is not limited to, various personal computers, notebook computers, smart phones, tablet computers, Internet of Things devices, and portable wearable devices. The Internet of Things device can be a smart speaker, a smart television, a smart air conditioner, a smart vehicle-mounted device, a projection device, etc. The portable wearable device can be a smart watch, a smart bracelet, a head-mounted device, etc. The head-mounted device can be a virtual reality (VR) device, an augmented reality (AR) device, smart glasses, etc.

[0050] In an exemplary embodiment, as shown in Figure 2 a circuit breaker tripping time determination method is provided, and the method is applied to a system including a terminal 102, a relay router 104, an electromagnetic repulsion simulation component 106, and a circuit breaker operating simulation component 108. Figure 1The following explanation uses relay router 104 as an example. Specifically:

[0051] S100, in response to a tripping operation for a circuit breaker simulation model, loads a pre-stored electromagnetic repulsion simulation model in the electromagnetic repulsion simulation component and a pre-stored circuit breaker operation simulation model in the circuit breaker operation component.

[0052] Among them, the electromagnetic repulsion simulation model is a simulation model of the electromagnetic repulsion mechanism, and the circuit breaker operation simulation model is a simulation model of the circuit breaker operation mechanism. The tripping operation is completed by the electromagnetic repulsion mechanism and the circuit breaker operation mechanism working together to control the size of the air gap between the repulsion plate and the tripping coil in the electromagnetic repulsion mechanism.

[0053] A circuit breaker is a switching device used to automatically disconnect circuits to prevent electrical equipment and lines from being damaged by faults such as overloads and short circuits. It is commonly used in power systems to close, carry, and interrupt current under normal or abnormal circuit conditions. The electromagnetic repulsion simulation model is a simulation model of an electromagnetic repulsion mechanism. An electromagnetic repulsion mechanism utilizes the principles of electromagnetism, where a current generates a magnetic field in one conductor, inducing eddy currents in another conductor. The magnetic fields generated by these two currents interact to produce a repulsive force, thereby driving mechanical parts to move. Compared to the more commonly used solenoid valves, the electromagnetic repulsion mechanism enables faster and more efficient opening and closing operations. The circuit breaker operation simulation model is a simulation model of the circuit breaker operating mechanism. The circuit breaker operating mechanism is a mechanical device used to control the closing and opening operations of a high-voltage circuit breaker. It can convert different forms of energy into the force required to operate the circuit breaker to realize the connection and disconnection of the circuit. The circuit breaker operating mechanism usually consists of a power part, an active part, a transmission part, and a buffer part. Its functions include closing, holding closed, opening, reclosing, free tripping, preventing jump, resetting, buffering, and interlocking.

[0054] Specifically, the terminal is equipped with an electromagnetic repulsion simulation component and a transmission dynamics simulation component. Users create an electromagnetic repulsion simulation model in the electromagnetic repulsion simulation component and a circuit breaker operation simulation model in the transmission dynamics simulation component. The electromagnetic repulsion simulation model is a simulation model of the electromagnetic repulsion mechanism, and the circuit breaker operation simulation model is a simulation model of the circuit breaker operation mechanism. Both the electromagnetic repulsion simulation model and the circuit breaker operation simulation model can be stored in the electromagnetic repulsion simulation component and the circuit breaker operation simulation component, respectively. In practical applications, the electromagnetic repulsion simulation component can be Maxwell software, and the circuit breaker operation simulation component can be a transmission dynamics simulation component, such as Amesim software.

[0055] The user triggers an opening operation of the circuit breaker at the terminal, the relay router responds to the opening operation of the circuit breaker simulation model, loads a pre-stored electromagnetic repulsion simulation model in the electromagnetic repulsion simulation component, and loads a pre-stored circuit breaker operation simulation model in the circuit breaker operation simulation component.

[0056] In an exemplary embodiment, the electromagnetic repulsion simulation model established by the user in the electromagnetic repulsion simulation component Maxwell is established according to the actual electromagnetic repulsion mechanism, but the electromagnetic repulsion simulation model is simplified to a certain extent from the actual electromagnetic repulsion mechanism, as shown in Figure 3 The opening coil, closing coil, and repulsion disc are reserved, and the repulsion disc is generally a metal repulsion disc. The working principle of the electromagnetic repulsion simulation model is that after receiving an opening signal, the driving circuit connected to the outside of the opening coil works, the coil is powered to generate a magnetic field, and an induced current is generated on the repulsion disc at the same time. The induced current also generates a magnetic field, and the two magnetic fields interact to generate an electromagnetic force to drive the repulsion disc to act. Similarly, the circuit breaker operation simulation model established in the transmission dynamics simulation component Amesim is also established according to a certain simplification of the actual circuit breaker operation mechanism.

[0057] In an exemplary embodiment, as shown in Figure 3 The motion domain is established in the transient solver, that is Figure 3 the air region changes in the simulation to limit the motion range of the metal repulsion disc in the circuit breaker opening time determination process.

[0058] S200, force updating step: according to the pre-configured initial air gap size between the repulsion disc and the opening coil of the electromagnetic repulsion simulation model at the current time step, the control force generated by the electromagnetic repulsion simulation model based on the initial air gap size is obtained by using the electromagnetic repulsion simulation component at the current time step, and the control force is sent to the circuit breaker operation simulation component.

[0059] Specifically, the relay router can also pre-configure the initial air gap size between the repulsion disc and the opening coil of the electromagnetic repulsion simulation model at the current time step. The initial air gap size is a pre-set initial air gap size, and the air gap size refers to the distance between the repulsion disc and the opening coil.

[0060] The relay router obtains, by using the electromagnetic repulsion simulation component, a control resultant force generated by the electromagnetic repulsion simulation model based on the preconfigured initial air gap size between the repulsion disc and the tripping coil of the electromagnetic repulsion simulation model at the current time step according to the current time step. That is, the electromagnetic repulsion simulation component generates the control resultant force based on the preconfigured initial air gap size between the repulsion disc and the tripping coil of the electromagnetic repulsion simulation model at the current time step, and sends the control resultant force to the relay router. Further, the relay router sends the control resultant force to the circuit breaker operating simulation component, and can also send the current time step to the circuit breaker operating simulation component, so that the circuit breaker operating simulation component and the electromagnetic repulsion simulation component are coupled in data at the same time sequence.

[0061] S300, by using the circuit breaker operating simulation component, obtaining an air gap size between the repulsion disc and the tripping coil generated when the control resultant force is taken as a load force of the circuit breaker operating simulation model at the current time step.

[0062] Specifically, the circuit breaker operating simulation component receives the control resultant force generated by the electromagnetic repulsion simulation component and transmitted through the relay router at the current time step, and takes the control resultant force as a load force of the circuit breaker operating simulation model, so that the circuit breaker operating simulation model generates an air gap size between the repulsion disc and the tripping coil based on a kinematic equation and the load force of the circuit breaker operating simulation model, and the circuit breaker operating simulation component sends the air gap size to the relay router.

[0063] S400, in the case where it is detected that the repulsion disc does not reach the preset position according to the air gap size, sending the air gap size to the electromagnetic repulsion simulation model, controlling the electromagnetic repulsion simulation model to take the air gap size as a new initial air gap size, updating a next time step to the current time step, and returning to the resultant force updating step until the repulsion disc reaches the preset position.

[0064] Specifically, in the case that the repulsion disc does not reach the preset position according to the air gap size, the air gap size is sent to the electromagnetic repulsion simulation component, so that the electromagnetic repulsion simulation component takes the air gap size as a new initial air gap size, and updates the next time step to the current time step, and iteratively processes until the repulsion disc reaches the preset position. That is, the interaction process between the two simulation components existing in the present application is that the electromagnetic repulsion simulation component sends the generated control resultant force to the circuit breaker operating simulation component, so that the circuit breaker operating simulation component takes the control resultant force as the load force of the circuit breaker operating simulation model, and generates a new air gap size between the repulsion disc and the opening coil based on the control resultant force. Then, the circuit breaker operating simulation component sends the updated air gap size to the electromagnetic repulsion simulation component, and the electromagnetic repulsion simulation component generates a new control resultant force based on the updated air gap size, so as to accurately simulate that the two simulation models perform real-time data communication and collaborative solution of the opening time under the mutual influence of the electromagnetic repulsion simulation model and the circuit breaker operating simulation model.

[0065] S500, taking the current time step when the repulsion disc reaches the preset position as the opening time of the circuit breaker simulation model.

[0066] Wherein, the full opening breaking time of the circuit breaker is composed of the opening time and the arc burning time, and the opening time can be divided into two parts, the first part is that the coil is electrified to the moving contact starts to act, which is called mechanism starting time; the time from the moving contact starts to act to the just opening position is called pre-compression time; the arc burning time can be divided into short arc burning time and long arc burning time, and the key of the fast circuit breaker is to compress the mechanism starting time, the short arc burning time and the pre-compression time.

[0067] Specifically, in the case that the repulsion disc reaches the preset position, the current time step when the repulsion disc reaches the preset position is taken as the opening time of the circuit breaker simulation model, and the opening time obtained at this time is a more accurate opening time. In addition, the motion characteristics of the circuit breaker operating simulation model after the circuit breaker receives the opening signal can also be obtained, such as motion speed, motion displacement, etc.

[0068] In the circuit breaker opening time determination method, after responding to the opening operation of the circuit breaker, the pre-stored electromagnetic repulsion simulation model is loaded in the electromagnetic repulsion simulation component, and the pre-stored circuit breaker operating simulation model is loaded in the circuit breaker operating component, so as to realize the consideration of the interaction between the electromagnetic repulsion simulation model and the circuit breaker operating simulation model, so that the control force generated by the electromagnetic repulsion simulation model and the air gap size generated by the circuit breaker operating simulation model at the current time step can be coupled and interacted in the two different models, and then the electromagnetic simulation of the electromagnetic repulsion simulation model and the hydraulic simulation of the circuit breaker operating simulation model are completed under the control of the same time step, thereby improving the accuracy of the determination of the circuit breaker opening time. Finally, in the case that the air gap size is detected to be not at the preset position of the repulsion disc, the air gap size is updated to the initial air gap size, the next time step is updated to the current time step, and the force updating step is returned until the repulsion disc reaches the preset position. The current time step when the repulsion disc reaches the preset position is taken as the opening time of the circuit breaker simulation model. This coupled simulation method can more realistically simulate the behavior of the circuit breaker under actual working conditions, ensure the consistency between the simulation model and the actual situation, improve the credibility in the process of determining the circuit breaker opening time, and help to more accurately determine the circuit breaker opening time.

[0069] In one exemplary embodiment, as shown in Figure 4 The electromagnetic repulsion simulation model further includes an improved two-stage valve and a bistable spring retention mechanism, S200, which includes:

[0070] S220, controlling the electromagnetic repulsion simulation component to obtain the gravity of the electromagnetic repulsion simulation model at the current time step, the minimum opening force required by the improved two-stage valve, and the additional force applied by the bistable spring retention mechanism.

[0071] S240, controlling the electromagnetic repulsion simulation component to perform opening simulation processing on the electromagnetic repulsion simulation model according to the pre-configured initial air gap size between the repulsion disc and the opening coil of the electromagnetic repulsion simulation model at the current time step, to generate the electromagnetic force received by the repulsion disc.

[0072] S260, controlling the electromagnetic repulsion simulation component to perform force analysis on the circuit breaker operating simulation model according to the electromagnetic force, the gravity, the minimum opening force, and the additional force, to obtain the control force of the circuit breaker operating simulation model.

[0073] S280, sending the control force to the circuit breaker operating simulation component.

[0074] Specifically, the force analysis of the electromagnetic repulsion simulation model can be seen that the force borne by the electromagnetic repulsion simulation model includes but is not limited to the electromagnetic force borne by the repulsion disc in the electromagnetic repulsion simulation model.

[0075] The force output by the electromagnetic repulsion simulation model includes but is not limited to: the gravity of the electromagnetic repulsion simulation model, the minimum tripping force required for the improved secondary valve, and the additional force applied by the bistable spring retention mechanism. The control resultant force of the electromagnetic repulsion simulation model is obtained by aggregating the electromagnetic force borne by the repulsion disc in the electromagnetic repulsion simulation model, the gravity of the electromagnetic repulsion simulation model, the minimum tripping force required for the improved secondary valve, and the additional force applied by the bistable spring retention mechanism, and then sending the control resultant force to the relay router. The expression of the control resultant force of the electromagnetic repulsion simulation model is as follows:

[0076] F = F em - F g - F x - F t

[0077] wherein F em is the electromagnetic force borne by the repulsion disc, F g is the gravity of the electromagnetic repulsion simulation model, F x is the minimum tripping force required for the improved secondary valve, F t is the additional force applied by the bistable spring retention mechanism, and F is the control resultant force of the electromagnetic repulsion simulation model required to be sent to the circuit breaker operating simulation assembly.

[0078] Further, the gravity of the electromagnetic repulsion simulation model, the minimum tripping force required for the improved secondary valve, and the additional force applied by the bistable spring retention mechanism can be pre-set, and the electromagnetic force borne by the repulsion disc in the electromagnetic repulsion simulation model needs to be calculated through the electromagnetic repulsion simulation assembly.

[0079] That is, the electromagnetic repulsion simulation assembly performs tripping simulation processing on the electromagnetic repulsion simulation model according to the pre-configured initial air gap size between the repulsion disc and the tripping coil of the electromagnetic repulsion simulation model at the current time step, to generate the electromagnetic force borne by the repulsion disc.

[0080] In an exemplary embodiment, the mathematical model for electromagnetic force calculation is analyzed from the perspective of magnetic circuit:

[0081] The magnetic motive force generated after the coil is energized is the main source of magnetic motive force in the magnetic circuit, which determines the total magnetic field of the system, and the calculation equation is:

[0082] F coil = N I

[0083] wherein N is the number of turns of the electromagnetic coil, and I is the coil current.

[0084] According to the law of electromagnetic induction, the time-varying magnetic field generated by the coil will generate an induced current in the repulsion disc:

[0085]

[0086] wherein For induced electromotive force, R is the resistance of the metal disk, For the magnetic flux through the repulsion disk.

[0087] The induced current on the repulsion disk further generates a reverse magnetic motive force:

[0088] F ind =N ind I ind

[0089] Where, N ind is the number of turns of the equivalent inductive circuit of the repulsion disk.

[0090] The coil, metal repulsion disk and air gap form a magnetic circuit, where the total magnetic motive force is:

[0091] F=F coil -F ind

[0092] According to the law of magnetic circuit:

[0093]

[0094] Where, R c is the magnetic resistance, which is composed of the magnetic resistance of the coil and the repulsion disk and the air gap magnetic resistance. Since the permeability of the air gap is small, the size of the air gap magnetic resistance determines the size of the magnetic resistance of the magnetic circuit:

[0095]

[0096] In the formula, R cg is the air gap magnetic resistance, l g is the air gap length, is the vacuum permeability, and A is the air gap cross-sectional area.

[0097] The electromagnetic force F em The calculation formula is:

[0098]

[0099]

[0100] In the formula, B is the magnetic induction intensity in the air gap. Since the magnetic flux is affected by the air gap length, the air gap becomes larger, the magnetic resistance of the magnetic circuit increases, and the magnetic flux density decreases, thereby reducing the electromagnetic force. The change of electromagnetic force in the whole process is very complex, and it may be difficult to accurately describe these dynamic effects through theoretical calculation. Through the finite element analysis software, that is, the electromagnetic repulsion simulation component Maxwell, the change of electromagnetic repulsion with the size of the air gap is analyzed.

[0101] In the above embodiment, the electromagnetic repulsion simulation component can comprehensively analyze the force of the electromagnetic repulsion simulation model through the electromagnetic repulsion simulation component, and accurately generate the control force of the circuit breaker operating simulation model.

[0102] In an exemplary embodiment, the circuit breaker operating simulation component is used to obtain the air gap size between the repulsion disc and the tripping coil generated by the control force as the load force of the circuit breaker operating simulation model at the current time step, including:

[0103] The control circuit breaker operating simulation component obtains the motion control information of the circuit breaker operating simulation model at the current time step, and takes the control force as the load force of the circuit breaker operating simulation model. The control circuit breaker operating simulation component performs kinematic analysis on the circuit breaker operating simulation model according to the load force and the motion control information, obtains the air gap size between the repulsion disc and the tripping coil, and obtains the air gap size generated by the circuit breaker operating simulation component.

[0104] Specifically, the circuit breaker operating mechanism can be simplified as a simulation model of "pressure accumulator-control valve-working cylinder-oil tank". For high-voltage circuit breaker hydraulic operating mechanism, due to the very short time of opening and closing process and the very large flow, a pressure accumulator is generally used to supply oil. The energy of the pressure accumulator is supplied by the oil pump during non-working period, so that the energy of the pressure accumulator is released during the operation of the operating mechanism.

[0105] Therefore, the control circuit breaker operating simulation component can obtain the motion control information of the circuit breaker operating simulation model at the current time step.

[0106] Further, the circuit breaker operating simulation component takes the control force as the load force of the circuit breaker operating simulation model. The load force participates in the motion control process of the circuit breaker operating simulation model. Therefore, the circuit breaker operating simulation component performs kinematic analysis on the circuit breaker operating simulation model according to the load force and the motion control information, obtains the air gap size between the repulsion disc and the tripping coil, and sends the air gap size generated by the circuit breaker operating simulation component to the relay router through the Python script reserved communication interface.

[0107] In the above embodiment, by controlling the circuit breaker operating simulation component to obtain the motion control information of the circuit breaker operating simulation model at the current time step, and controlling the circuit breaker operating simulation component to take the control force as the load force of the circuit breaker operating simulation model, the circuit breaker operating simulation component can accurately calculate the required air gap size between the repulsion disc and the tripping coil under the load force.

[0108] In an example embodiment, the circuit breaker operating simulation model comprises a working cylinder; the motion control information comprises a rod cavity action area of the working cylinder of the circuit breaker operating simulation model, a rodless cavity action area of the working cylinder, an actual pressure of the rod cavity of the working cylinder, an actual pressure of the rodless cavity of the working cylinder, and a friction resistance of the working cylinder; the control circuit breaker operating simulation component performs kinematic analysis on the circuit breaker operating simulation model according to the load force and the motion control information, to obtain the air gap size between the repulsion disc and the opening coil, comprising:

[0109] The control circuit breaker operating simulation component performs kinematic analysis on the circuit breaker operating simulation model according to the load force, the rod cavity action area of the working cylinder, the rodless cavity action area of the working cylinder, the actual pressure of the rod cavity of the working cylinder, the actual pressure of the rodless cavity of the working cylinder, and the friction resistance of the working cylinder, to generate the actual displacement of the repulsion disc, and to obtain the air gap size between the repulsion disc and the opening coil generated by the control circuit breaker operating simulation component based on the initial air gap size and the actual displacement.

[0110] The piston divides the cylinder into two working chambers, one end with a piston rod is called a rod cavity, and the other end without a piston rod is called a rodless cavity.

[0111] Specifically, the circuit breaker operating simulation model is actually a simulation model of a "pressure accumulator-control valve-working cylinder-oil tank". The motion control information of the circuit breaker operating simulation model comprises a rod cavity action area of the working cylinder of the circuit breaker operating simulation model, a rodless cavity action area of the working cylinder, an actual pressure of the rod cavity of the working cylinder, an actual pressure of the rodless cavity of the working cylinder, and a friction resistance of the working cylinder.

[0112] The control circuit breaker operating simulation component models the opening and closing process of the circuit breaker according to the load force and the motion control information. Specifically, the control circuit breaker operating simulation component obtains the rod cavity action area of the working cylinder of the circuit breaker operating simulation model, the rodless cavity action area of the working cylinder, the actual pressure of the rod cavity of the working cylinder, the actual pressure of the rodless cavity of the working cylinder, and the friction resistance of the working cylinder, performs kinematic analysis on the circuit breaker operating simulation model according to the load force, the rod cavity action area of the working cylinder, the rodless cavity action area of the working cylinder, the actual pressure of the rod cavity of the working cylinder, the actual pressure of the rodless cavity of the working cylinder, and the friction resistance of the working cylinder, to obtain the motion characteristics of the piston in the working cylinder, that is, the actual displacement of the piston in the working cylinder, and to take the actual displacement of the piston in the working cylinder as the displacement size of the repulsion disc.

[0113] The control circuit breaker operating simulation component generates the air gap size between the repulsion disc and the opening coil based on the initial air gap size and the actual displacement, and sends the air gap size to the relay router.

[0114] In an example embodiment, the control circuit breaker operating simulation component establishes the kinematic equation of the working cylinder as:

[0115]

[0116] In the formula, A1 is the working cylinder rod cavity action area; A2 is the working cylinder rodless cavity action area; P1 is the working cylinder rod cavity pressure; P2 is the working cylinder rodless cavity pressure; x is the actual displacement of the piston; f is the friction resistance; m is the mass of the moving part; and F is the load force.

[0117] That is, the circuit breaker operating simulation component generates a first pressure value based on the working cylinder rod cavity action area and the working cylinder rod cavity pressure, generates a second pressure value based on the working cylinder rodless cavity action area and the working cylinder rodless cavity pressure, performs kinematic analysis on the circuit breaker operating simulation model based on the first pressure value, the second pressure value, the friction resistance, and the load force to generate the actual displacement of the piston in the working cylinder, and takes the actual displacement of the piston in the working cylinder as the actual displacement of the repulsion disc.

[0118] Further, the distance between the repulsion disc and the opening coil is initially the initial air gap size, and therefore, the circuit breaker operating simulation component can easily generate the air gap size between the repulsion disc and the opening coil based on the initial air gap size and the actual displacement of the repulsion disc in the working cylinder. That is, the actual displacement of the piston is superimposed on the initial air gap size to generate a new air gap size between the repulsion disc and the opening coil.

[0119] In the above embodiment, the circuit breaker operating simulation component accurately generates the air gap size between the repulsion disc and the opening coil under the force condition by using the load force, the working cylinder rod cavity action area, the working cylinder rodless cavity action area, the working cylinder rod cavity actual pressure, the working cylinder rodless cavity actual pressure, and the working cylinder friction resistance of the circuit breaker operating simulation model.

[0120] In one exemplary embodiment, the circuit breaker operating simulation model further includes a control valve and a pipeline, and the motion control information includes the working cylinder rod cavity actual pressure and the working cylinder rodless cavity actual pressure of the circuit breaker operating simulation model; and the control of the circuit breaker operating simulation component to obtain the working cylinder rod cavity actual pressure and the working cylinder rodless cavity actual pressure of the circuit breaker operating simulation model at the current time step includes:

[0121] The control of the circuit breaker operating simulation component to obtain the working cylinder rod cavity actual pressure and the working cylinder rodless cavity actual pressure of the circuit breaker operating simulation model at the current time step includes: controlling the circuit breaker operating simulation component to obtain the working cylinder rod cavity ideal pressure, the working cylinder rodless cavity ideal pressure, the control valve pressure loss, and the pipeline pressure loss of the circuit breaker operating simulation model at the current time step; and controlling the circuit breaker operating simulation component to perform force analysis on the circuit breaker operating simulation model according to the working cylinder rod cavity ideal pressure, the control valve pressure loss, and the pipeline pressure loss to obtain the working cylinder rod cavity actual pressure; and controlling the circuit breaker operating simulation component to perform force analysis on the circuit breaker operating simulation model according to the working cylinder rodless cavity ideal pressure, the control valve pressure loss, and the pipeline pressure loss to obtain the working cylinder rodless cavity actual pressure.

[0122] Specifically, the actual pressure of the working cylinder of the circuit breaker operating simulation model is also divided into the actual pressure of the rod cavity of the working cylinder and the actual pressure of the rodless cavity of the working cylinder.

[0123] Firstly, the circuit breaker operating simulation component can obtain the ideal pressure of the rod cavity of the working cylinder and the ideal pressure of the rodless cavity of the working cylinder of the circuit breaker operating simulation model at the current time step. However, in the present application, it is also considered that the control valve and the pipeline in the circuit breaker operating simulation model will have a certain pressure loss, so by detecting the control valve pressure loss and the pipeline pressure loss, in combination with the ideal pressure of the rod cavity of the working cylinder or the ideal pressure of the rodless cavity of the working cylinder, the actual pressure of the rod cavity of the working cylinder and the actual pressure of the rodless cavity of the working cylinder can be obtained. It needs to be explained that the pressure loss is generated at the valve and the pipeline, and has nothing to do with whether there is a rod in the working cylinder, so it is not divided into the case of the working cylinder without a rod and the case of the working cylinder with a rod.

[0124] Then, the relay router controls the circuit breaker operating simulation component to perform force analysis on the circuit breaker operating simulation model according to the ideal pressure of the rod cavity of the working cylinder, the control valve pressure loss and the pipeline pressure loss, to generate the actual pressure of the rod cavity of the working cylinder, and the generated expression of the actual pressure P p工作缸有杆实际 of the rod cavity of the working cylinder is:

[0125] P p工作缸有杆实际 =F 工作缸有杆腔理想 -△P1-△P2

[0126] Wherein, F 工作缸有杆腔理想 is the ideal pressure of the rod cavity of the working cylinder without considering the internal and external leakage of the working cylinder, △P2 is the pressure loss of the liquid flowing in the pipeline, which is calculated by the pipeline loss equation, and △P1 is the pressure loss of the liquid flowing in the control valve, which is calculated by the control valve loss equation.

[0127] The relay router controls the circuit breaker operating simulation component to perform force analysis on the circuit breaker operating simulation model according to the ideal pressure of the rod cavity of the working cylinder, the control valve pressure loss and the pipeline pressure loss, to generate the actual pressure of the rod cavity of the working cylinder, and the generated expression of the actual pressure P p工作缸无杆实际 of the rod cavity of the working cylinder is:

[0128] P p工作缸无杆实际 =F 工作缸无杆腔理想 -△P1-△P2

[0129] Wherein, F 工作缸有杆腔理想 is the ideal pressure of the rod cavity of the working cylinder without considering the internal and external leakage of the working cylinder, △P2 is the pressure loss of the liquid flowing in the pipeline, which is calculated by the pipeline loss equation, and △P1 is the pressure loss of the liquid flowing in the control valve, which is calculated by the control valve loss equation.

[0130] In an example embodiment, the circuit breaker operating simulation component obtains the control valve port flow coefficient, the control valve port flow area, and the flowing liquid oil density, and generates the control valve pressure loss based on the control valve port flow coefficient, the control valve port flow area, and the flowing liquid oil density. The control valve pressure loss equation is:

[0131]

[0132] wherein, ΔP1 is the control valve pressure loss, which is generally the control valve port pressure loss; C d is the control valve port flow coefficient; A3 is the control valve port flow area; and p is the oil density, which is generally taken as 850 kg / m3.

[0133] In an example embodiment, the circuit breaker operating simulation component obtains the pipe pressure loss, the pipe length, the pipe length, the pipe diameter, the pipe local loss coefficient, and the oil flow rate in the pipe, and generates the control valve pressure loss based on the pipe pressure loss, the pipe length, the pipe length, the pipe diameter, the pipe local loss coefficient, and the oil flow rate in the pipe. The pipe pressure loss equation is:

[0134]

[0135] wherein, ΔP2 is the pipe pressure loss, is the pipe friction loss coefficient, the theoretical value of which is 64 / Re, wherein Re is the dimensionless Reynolds number; l is the pipe length; d is the pipe diameter; E is the pipe local loss coefficient; and v is the oil flow rate in the pipe.

[0136] In the above embodiments, by accurately obtaining the control valve pressure loss and the pipe pressure loss of the circuit breaker operating simulation model, the ideal pressures of the rod cavity of the working cylinder and the rod cavity of the working cylinder of the circuit breaker operating simulation model can be updated to obtain the actual pressures of the rod cavity of the working cylinder and the rod cavity of the working cylinder, which is more consistent with the application environment of the circuit breaker operating mechanism in actual production and life, and improves the accuracy of the determination of the circuit breaker opening time.

[0137] In an example embodiment, the control circuit breaker operating simulation component obtains the ideal pressures of the rod cavity of the working cylinder and the rod cavity of the working cylinder of the circuit breaker operating simulation model at the current time step, including:

[0138] The control circuit breaker operating simulation component obtains the flow rates of the rod cavity of the working cylinder and the rod cavity of the working cylinder of the circuit breaker operating simulation model when there is no leakage of the working cylinder at the current time step, and generates the ideal pressure of the rod cavity of the working cylinder based on the flow rate of the rod cavity of the working cylinder, and generates the ideal pressure of the rod cavity of the working cylinder based on the flow rate of the rod cavity of the working cylinder.

[0139] Specifically, the ideal pressure of the rod cavity of the working cylinder is generated by the circuit breaker operating simulation assembly based on the working cylinder rod cavity flow of the circuit breaker operating simulation model, and the ideal pressure of the rodless cavity of the working cylinder is generated by the circuit breaker operating simulation assembly based on the working cylinder rodless cavity flow of the circuit breaker operating simulation model. It should be noted that the ideal pressure of the rod cavity of the working cylinder and the ideal pressure of the rodless cavity of the working cylinder are both ideal pressures obtained without considering the internal and external leakage of the working cylinder.

[0140] The circuit breaker operating simulation assembly obtains the working cylinder flow continuity equation when the working cylinder does not leak at the current time step, generates the working cylinder rod cavity flow and the working cylinder rodless cavity flow of the circuit breaker operating simulation model based on the working cylinder flow continuity equation, and generates the ideal pressure of the working cylinder rod cavity based on the working cylinder rod cavity flow and generates the ideal pressure of the working cylinder rodless cavity based on the working cylinder rodless cavity flow.

[0141] In an exemplary embodiment, the circuit breaker operating simulation assembly obtains the working cylinder rod cavity volume, the working cylinder rodless cavity volume, and the oil elastic modulus of the circuit breaker operating simulation model when the working cylinder does not leak at the current time step, and generates the ideal pressure of the working cylinder rod cavity based on the working cylinder rod cavity volume and the oil elastic modulus, and generates the ideal pressure of the working cylinder rodless cavity based on the working cylinder rodless cavity volume and the oil elastic modulus. The expression of the working cylinder flow continuity equation is as follows:

[0142]

[0143]

[0144] Wherein, Q1 is the working cylinder rod cavity flow; Q2 is the working cylinder rodless cavity flow; V1 is the working cylinder rod cavity volume; V2 is the working cylinder rodless cavity volume; K is the oil elastic modulus.

[0145] In the above embodiment, the circuit breaker operating simulation assembly obtains the working cylinder rod cavity flow and the working cylinder rodless cavity flow of the circuit breaker operating simulation model when the working cylinder does not leak at the current time step, which can accurately generate the ideal pressure of the working cylinder rod cavity and the ideal pressure of the working cylinder rodless cavity, and further improve the accuracy of kinematic analysis of the circuit breaker operating simulation model.

[0146] In an exemplary embodiment, the circuit breaker opening time determination method comprises:

[0147] (1) Establishing an electromagnetic simulation model of the electromagnetic repulsion mechanism and a circuit breaker operating simulation model of the circuit breaker operating mechanism: an electromagnetic simulation model of the electromagnetic repulsion mechanism is established in the electromagnetic simulation software Maxwell, the mechanism is simplified to retain the opening coil, the closing coil and the metal repulsion disc. The motion domain is established in the transient solver, i.e. the air area in the schematic diagram that changes in simulation, to limit the movement range of the metal repulsion disc in the simulation process. The circuit breaker operating mechanism is simplified in the circuit breaker operating assembly, for example, to a simulation model of a "pressure accumulator-control valve-working cylinder-oil tank", to obtain a circuit breaker operating simulation model of the circuit breaker operating mechanism.

[0148] (2) Coupling between the electromagnetic repulsion simulation model and the circuit breaker operating simulation model: in response to the opening operation of the circuit breaker, the pre-stored electromagnetic repulsion simulation model is loaded in the electromagnetic repulsion simulation assembly, the electromagnetic repulsion simulation assembly obtains the gravity, the minimum opening force required for improving the secondary valve and the additional force applied by the bistable spring holding mechanism of the electromagnetic repulsion simulation model at the current time step, and generates the electromagnetic force on the repulsion disc according to the pre-configured initial air gap size between the repulsion disc and the opening coil of the electromagnetic repulsion simulation model at the current time step; the circuit breaker operating simulation model is subjected to force analysis according to the electromagnetic force, the gravity, the minimum opening force and the additional force, to obtain the control force of the circuit breaker operating simulation model. Finally, the control force is sent to the relay router, which sends the control force to the circuit breaker operating simulation assembly.

[0149] The circuit breaker operating simulation assembly takes the control force as the load force of the circuit breaker operating simulation model, and obtains the working cylinder rod cavity action area, the working cylinder rod cavity actual pressure, the working cylinder friction resistance and other motion control information of the circuit breaker operating simulation model, and performs kinematic analysis on the circuit breaker operating simulation model according to the load force, the working cylinder rod cavity action area, the working cylinder rod cavity actual pressure, the working cylinder friction resistance and other motion control information, to generate the actual displacement of the repulsion disc, and generate the air gap size between the repulsion disc and the opening coil based on the initial air gap size and the actual displacement. Finally, the generated air gap size is sent to the relay router.

[0150] The obtaining process of the actual pressure of the rod cavity of the working cylinder of the circuit breaker operating simulation model at the current time step includes: the circuit breaker operating simulation component obtains the ideal pressure of the rod cavity of the working cylinder of the circuit breaker operating simulation model at the current time step, the pressure loss of the control valve, and the pressure loss of the pipeline; and the ideal pressure of the rod cavity of the working cylinder, the pressure loss of the control valve, and the pressure loss of the pipeline are used for force analysis of the circuit breaker operating simulation model to obtain the actual pressure of the rod cavity of the working cylinder.

[0151] The ideal pressure of the rod cavity of the working cylinder of the circuit breaker operating simulation model at the current time step includes: the circuit breaker operating simulation component obtains the flow of the rod cavity of the working cylinder of the circuit breaker operating simulation model at the current time step when no leakage occurs in the working cylinder; and the flow of the rod cavity of the working cylinder is used to generate the ideal pressure of the rod cavity of the working cylinder.

[0152] The relay router detects whether the repulsion disc reaches the preset position according to the air gap size. In the case where it is detected that the repulsion disc does not reach the preset position according to the air gap size, the air gap size is sent to the electromagnetic repulsion simulation component, the electromagnetic repulsion simulation component is controlled to take the air gap size as a new initial air gap size, the next time step is updated to the current time step, and the step of obtaining, by the electromagnetic repulsion simulation component, the control force generated by the electromagnetic repulsion simulation model based on the initial air gap size at the current time step according to the preconfigured initial air gap size between the repulsion disc and the opening coil of the electromagnetic repulsion simulation model at the current time step is returned until the repulsion disc reaches the preset position. Finally, the current time step when the repulsion disc reaches the preset position is taken as the opening time of the circuit breaker.

[0153] The circuit breaker opening time determination method of the application considers the influence of the electromagnetic repulsion mechanism and the hydraulic operating mechanism on each other when the circuit breaker is opened. The coupling simulation of the electromagnetic and operating mechanisms is realized under the same time step through the reserved communication interface and the writing of the relay router, which improves the accuracy of the simulation calculation of the motion characteristics of the circuit breaker operating mechanism, and the calculation result tends to be true. At the same time, with the cooperation of the application, the more reasonable action characteristics of the circuit breaker operating mechanism can more accurately determine the time and position of the arc appearing in the breaking process, which is very important for the analysis of the arc behavior and provides reliable comprehensive analysis and prediction ability, which has important significance for the overall design, optimization and engineering application of the circuit breaker.

[0154] More specifically, the technical scheme of the application focuses on the coupling implementation of the simulation process of the circuit breaker operating mechanism and the electromagnetic repulsion mechanism to more accurately simulate the motion characteristics of the circuit breaker from receiving the opening signal to operating the pull rod. The main key points are: 1. Coupling implementation of the circuit breaker electromagnetic repulsion mechanism and the hydraulic operating mechanism: the core is to propose a coupling calculation method, which can consider the mutual influence of the two components during the operation of the circuit breaker to ensure the consistency of the model with the actual situation and improve the reliability of the simulation. 2. Step-by-step calculation setting of the electromagnetic repulsion mechanism: the electromagnetic repulsion simulation component itself cannot pause and continue calculation, therefore, the application designs a setting method to convert the air gap size into the initial position parameter in the motion domain of the electromagnetic repulsion simulation component, that is, the initial air gap size, realizes the automatic continuation of the electromagnetic repulsion simulation component under the change of the air gap, and makes the electromagnetic simulation and hydraulic simulation can be calculated interactively under the same time sequence. 3. Model communication interface and relay router design: the application writes a Python script to reserve a data transmission interface for the electromagnetic repulsion simulation component and the circuit breaker operating component, so that the target data can be automatically obtained and transmitted between the two different simulation software, the relay router can process the data, control the calculation of the two programs to be in the same time sequence, and provide a powerful tool for coupling simulation. The method of the application is helpful for the design of the circuit breaker, improves the accuracy of the simulation calculation of the opening time, and ensures the reliability and safety of the power system.

[0155] Overall, the application considers the interaction between the electromagnetic repulsion mechanism and the hydraulic circuit breaker operating mechanism, realizes real-time data communication between the two simulation modules by designing a communication interface and a relay router, this dynamic data transmission ensures that the simulation models of the electromagnetic repulsion mechanism and the hydraulic circuit breaker operating mechanism can be simulated cooperatively under a unified time step, improving the accuracy of the simulation calculation of the circuit breaker opening time, this coupled simulation method can more realistically simulate the behavior of the circuit breaker under actual working conditions, thereby improving the credibility of the simulation results, which helps to more accurately evaluate the opening start time of the circuit breaker, which is crucial for the design and optimization of the circuit breaker. By improving the design accuracy, the reliability and safety of the circuit breaker in the power system can be ensured. At the same time, the coupled simulation technology provided by the application can more accurately determine the time and position of the arc appearing in the breaking process, which is very important for the analysis of the arc behavior and the evaluation of the arc extinction performance, and helps to improve the arc extinction performance of the circuit breaker.

[0156] It should be understood that although each step in the flowchart involved in the above embodiments is displayed in sequence according to the arrow, these steps are not necessarily executed in the order indicated by the arrow. Unless otherwise specified herein, the execution of these steps is not strictly limited in sequence, and these steps can be executed in other orders. Moreover, at least part of the steps in the flowchart involved in the above embodiments can include multiple steps or stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily sequential, but can be alternately or alternately executed with at least part of other steps or steps or stages in other steps.

[0157] Based on the same inventive concept, the application also provides a circuit breaker opening time determination device for implementing the above-mentioned circuit breaker opening time determination method. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme described in the above method, so the specific limitations in one or more circuit breaker opening time determination device embodiments provided below can refer to the limitations of the circuit breaker opening time determination method in the above text, which will not be repeated here.

[0158] In one exemplary embodiment, as shown in Figure 5 A circuit breaker opening time determination device is provided, comprising: a simulation model loading module 100, a control force updating module 200, a gap size updating module 300, an iteration module 400 and an opening time determination module 500, wherein:

[0159] The simulation model loading module 100 is configured to load a pre-stored electromagnetic repulsion simulation model in the electromagnetic repulsion simulation component and a pre-stored circuit breaker operating simulation model in the circuit breaker operating component in response to the opening operation of the circuit breaker, wherein the electromagnetic repulsion simulation model is a simulation model of an electromagnetic repulsion mechanism, the circuit breaker operating simulation model is a simulation model of a circuit breaker operating mechanism, and the opening operation is completed by the electromagnetic repulsion mechanism and the circuit breaker operating mechanism cooperatively controlling the size of the air gap between the repulsion disc and the opening coil in the electromagnetic repulsion mechanism.

[0160] The control resultant force updating module 200 is configured to perform a resultant force updating step of: obtaining, by the electromagnetic repulsion simulation component, a control resultant force generated by the electromagnetic repulsion simulation model based on the preconfigured initial air gap size between the repulsion disc and the opening coil in the electromagnetic repulsion simulation model at the current time step according to the preconfigured initial air gap size between the repulsion disc and the opening coil in the electromagnetic repulsion simulation model at the current time step, and sending the control resultant force to the circuit breaker operating simulation component.

[0161] The air gap size updating module 300 is configured to obtain, by the circuit breaker operating simulation component, the air gap size between the repulsion disc and the opening coil generated by the circuit breaker operating simulation model when the control resultant force is used as a load force of the circuit breaker operating simulation model at the current time step.

[0162] The iteration module 400 is configured to, in a case where it is detected that the repulsion disc does not reach the preset position according to the air gap size, send the air gap size to the electromagnetic repulsion simulation component, control the electromagnetic repulsion simulation component to use the air gap size as a new initial air gap size, update a next time step to the current time step, and return to the resultant force updating step until the repulsion disc reaches the preset position.

[0163] The opening time determining module 500 is configured to use the current time step when the repulsion disc reaches the preset position as the opening time of the circuit breaker.

[0164] In one embodiment, the electromagnetic repulsion simulation model further includes an improved secondary valve and a bistable spring holding mechanism, and the control resultant force updating module 200 is further configured to control the electromagnetic repulsion simulation component to obtain the gravity of the electromagnetic repulsion simulation model, the minimum opening force required by the improved secondary valve, and the additional force applied by the bistable spring holding mechanism at the current time step; control the electromagnetic repulsion simulation component to perform opening simulation processing on the electromagnetic repulsion simulation model according to the preconfigured initial air gap size between the repulsion disc and the opening coil in the electromagnetic repulsion simulation model at the current time step, to generate an electromagnetic force acting on the repulsion disc; and control the electromagnetic repulsion simulation component to perform force analysis on the circuit breaker operating simulation model according to the electromagnetic force, the gravity, the minimum opening force, and the additional force, to obtain the control resultant force of the circuit breaker operating simulation model.

[0165] In one embodiment, the air gap size updating module 300 is further configured to control the circuit breaker operating simulation component to obtain motion control information of the circuit breaker operating simulation model at the current time step, and to obtain the control resultant force as a load force of the circuit breaker operating simulation model; control the circuit breaker operating simulation component to perform kinematic analysis on the circuit breaker operating simulation model according to the load force and the motion control information, to obtain the air gap size between the repulsion disc and the trip coil, and to obtain the air gap size generated by the circuit breaker operating simulation component.

[0166] In one embodiment, the circuit breaker operating simulation model comprises a working cylinder; the motion control information comprises a rod cavity action area of the working cylinder, a rodless cavity action area of the working cylinder, an actual pressure of the rod cavity of the working cylinder, an actual pressure of the rodless cavity of the working cylinder, and a friction resistance of the working cylinder; the air gap size updating module 300 is further configured to control the circuit breaker operating simulation component to perform kinematic analysis on the circuit breaker operating simulation model according to the load force, the rod cavity action area of the working cylinder, the rodless cavity action area of the working cylinder, the actual pressure of the rod cavity of the working cylinder, the actual pressure of the rodless cavity of the working cylinder, and the friction resistance of the working cylinder, to generate an actual displacement of the repulsion disc; and to obtain the air gap size between the repulsion disc and the trip coil generated by the circuit breaker operating simulation component based on the initial air gap size and the actual displacement.

[0167] In one embodiment, the circuit breaker operating simulation model further comprises a control valve and a pipeline; the motion control information comprises an actual pressure of a rod cavity of a working cylinder of the circuit breaker operating simulation model and an actual pressure of a rodless cavity of the working cylinder; the air gap size updating module 300 is further configured to control the circuit breaker operating simulation component to obtain an ideal pressure of the rod cavity of the working cylinder, an ideal pressure of the rodless cavity of the working cylinder, a pressure loss of the control valve, and a pressure loss of the pipeline of the circuit breaker operating simulation model at the current time step; control the circuit breaker operating simulation component to perform force analysis on the circuit breaker operating simulation model according to the ideal pressure of the rod cavity of the working cylinder, the pressure loss of the control valve, and the pressure loss of the pipeline, to obtain the actual pressure of the rod cavity of the working cylinder; and control the circuit breaker operating simulation component to perform force analysis on the circuit breaker operating simulation model according to the ideal pressure of the rodless cavity of the working cylinder, the pressure loss of the control valve, and the pressure loss of the pipeline, to obtain the actual pressure of the rodless cavity of the working cylinder.

[0168] In one embodiment, the air gap size updating module 300 is further configured to control the circuit breaker operating simulation component to obtain a rod cavity flow and a rodless cavity flow of the working cylinder of the circuit breaker operating simulation model at the current time step when no leakage occurs in the working cylinder; control the circuit breaker operating simulation component to generate an ideal pressure of the rod cavity of the working cylinder based on the rod cavity flow, and to generate an ideal pressure of the rodless cavity of the working cylinder based on the rodless cavity flow.

[0169] The modules in the circuit breaker opening time determination apparatus can be implemented by software, hardware, or a combination thereof. The modules can be embedded in or independent of a processor in a computer device in hardware form, or stored in a memory in the computer device in software form, so that the processor can call and execute the operations of the modules.

[0170] In an example embodiment, a computer device, which can be a server, has an internal structure as shown in Figure 6 The computer device includes a processor, a memory, an input / output interface, and a communication interface. The processor, the memory, and the input / output interface are connected by a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the computer device provides computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operating system and the computer program in the non-volatile storage medium. The database of the computer device stores data such as a circuit breaker operating simulation model and an electromagnetic repulsion simulation model. The input / output interface of the computer device exchanges information between the processor and external devices. The communication interface of the computer device communicates with terminals outside through a network connection. The computer program is executed by the processor to implement a circuit breaker opening time determination method.

[0171] Those skilled in the art can understand that Figure 6 The structure shown in the above

[0172] In an embodiment, a computer device is also provided, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps in the above method embodiments. In an embodiment, a computer readable storage medium is provided, which stores a computer program. The computer program is executed by a processor to implement the steps in the above method embodiments. In an embodiment, a computer program product is provided, which includes a computer program. The computer program is executed by a processor to implement the steps in the above method embodiments.

[0173] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by a computer program instructing relevant hardware. The computer program can be stored in a non-volatile computer readable storage medium. When the computer program is executed, the processes of the above-mentioned embodiment methods can be included. Any reference to memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. The non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical storage, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. The volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration but not limitation, the RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The database involved in the embodiments provided in the present application can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., and is not limited thereto. The processor involved in the embodiments provided in the present application can be a general processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., and is not limited thereto.

[0174] The technical features of the above embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered as the scope of the present application.

[0175] The above embodiments only express several implementation ways of the present application, and the description is specific and detailed, but it should not be understood as a limitation to the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A circuit breaker opening time determination method characterized by, The method comprises: in response to a tripping operation of the circuit breaker, loading a pre-stored electromagnetic repulsion simulation model in an electromagnetic repulsion simulation component and loading a pre-stored circuit breaker operating simulation model in a circuit breaker operating simulation component, wherein the electromagnetic repulsion simulation model is a simulation model of an electromagnetic repulsion mechanism, the circuit breaker operating simulation model is a simulation model of a circuit breaker operating mechanism, and the tripping operation is completed by the electromagnetic repulsion mechanism and the circuit breaker operating mechanism cooperatively controlling the size of an air gap between a repulsion disc and a tripping coil in the electromagnetic repulsion mechanism; a resultant force updating step: according to a pre-configured initial air gap size between the repulsion disc and the tripping coil of the electromagnetic repulsion simulation model at a current time step, using the electromagnetic repulsion simulation component, obtaining a control resultant force generated by the electromagnetic repulsion simulation model based on the initial air gap size at the current time step, and sending the control resultant force to the circuit breaker operating simulation component; using the circuit breaker operating simulation component, obtaining the size of the air gap between the repulsion disc and the tripping coil generated when the control resultant force is taken as a load force of the circuit breaker operating simulation model at the current time step; in the case where it is detected that the repulsion disc does not reach a preset position according to the size of the air gap, sending the size of the air gap to the electromagnetic repulsion simulation component, controlling the electromagnetic repulsion simulation component to take the size of the air gap as a new initial air gap size, updating a next time step to the current time step, and returning to the resultant force updating step until the repulsion disc reaches the preset position; taking the current time step when the repulsion disc reaches the preset position as a tripping time of the circuit breaker.

2. The method of claim 1, wherein, The electromagnetic repulsion simulation model further comprises an improved secondary valve and a bistable spring holding mechanism, and the step of obtaining, according to a pre-configured initial air gap size between the repulsion disc and the tripping coil of the electromagnetic repulsion simulation model at a current time step, a control resultant force generated by the electromagnetic repulsion simulation model based on the initial air gap size at the current time step using the electromagnetic repulsion simulation component comprises: controlling the electromagnetic repulsion simulation component to obtain a gravity of the electromagnetic repulsion simulation model at the current time step, a minimum tripping force required by the improved secondary valve, and an additional force applied by the bistable spring holding mechanism; controlling the electromagnetic repulsion simulation component to perform tripping simulation processing on the electromagnetic repulsion simulation model according to the pre-configured initial air gap size between the repulsion disc and the tripping coil of the electromagnetic repulsion simulation model at the current time step, to generate an electromagnetic force borne by the repulsion disc; controlling the electromagnetic repulsion simulation component to perform force analysis on the circuit breaker operating simulation model according to the electromagnetic force, the gravity, the minimum tripping force, and the additional force, to obtain a control resultant force of the circuit breaker operating simulation model.

3. The method of claim 1, wherein, The step of using the circuit breaker operating simulation component to obtain the size of the air gap between the repulsion disc and the tripping coil generated when the control resultant force is taken as a load force of the circuit breaker operating simulation model at the current time step comprises: The circuit breaker operating simulation component is controlled to acquire motion control information of the circuit breaker operating simulation model at a current time step, and the control resultant force is taken as a load force of the circuit breaker operating simulation model. The circuit breaker operating simulation component is controlled to perform kinematic analysis on the circuit breaker operating simulation model according to the load force and the motion control information, to obtain an air gap size between the repulsion disc and the opening coil, and to acquire the air gap size generated by the circuit breaker operating simulation component.

4. The method of claim 3, wherein, The circuit breaker operating simulation model comprises a working cylinder, and the motion control information comprises a working cylinder rod cavity action area, a working cylinder rod cavity actual pressure, a working cylinder friction resistance, and the like of the circuit breaker operating simulation model. The circuit breaker operating simulation component is controlled to perform kinematic analysis on the circuit breaker operating simulation model according to the load force, the working cylinder rod cavity action area, the working cylinder rod cavity actual pressure, the working cylinder friction resistance, and the like, to generate an actual displacement of the repulsion disc. The circuit breaker operating simulation component is controlled to acquire an air gap size between the repulsion disc and the opening coil generated by the circuit breaker operating simulation component based on the initial air gap size and the actual displacement.

5. The method of claim 4, wherein, The circuit breaker operating simulation model further comprises a control valve and a pipeline, and the motion control information comprises a working cylinder rod cavity actual pressure and a working cylinder rod cavity actual pressure of the circuit breaker operating simulation model. The circuit breaker operating simulation component is controlled to acquire a working cylinder rod cavity ideal pressure, a working cylinder rod cavity ideal pressure, a control valve pressure loss, and a pipeline pressure loss of the circuit breaker operating simulation model at a current time step. The circuit breaker operating simulation component is controlled to perform force analysis on the circuit breaker operating simulation model according to the working cylinder rod cavity ideal pressure, the control valve pressure loss, and the pipeline pressure loss, to obtain a working cylinder rod cavity actual pressure. The circuit breaker operating simulation component is controlled to perform force analysis on the circuit breaker operating simulation model according to the working cylinder rod cavity ideal pressure, the control valve pressure loss, and the pipeline pressure loss, to obtain a working cylinder rod cavity actual pressure.

6. The method of claim 5, wherein, The circuit breaker operating simulation component is controlled to acquire a working cylinder rod cavity ideal pressure and a working cylinder rod cavity ideal pressure of the circuit breaker operating simulation model at a current time step. The circuit breaker operating simulation component is controlled to acquire a working cylinder rod cavity ideal pressure and a working cylinder rod cavity ideal pressure of the circuit breaker operating simulation model at a current time step. The circuit breaker operating simulation component is controlled to acquire a working cylinder rod cavity ideal pressure and a working cylinder rod cavity ideal pressure of the circuit breaker operating simulation model at a current time step. The control circuit controls the working cylinder rod cavity ideal pressure based on the working cylinder rod cavity flow and controls the working cylinder rodless cavity ideal pressure based on the working cylinder rodless cavity flow.

7. A circuit breaker opening time determination device characterized by comprising: The device comprises: The simulation model loading module is configured to load a pre-stored electromagnetic repulsion simulation model in the electromagnetic repulsion simulation component and load a pre-stored circuit breaker operating simulation model in the circuit breaker operating simulation component in response to a tripping operation of a circuit breaker, wherein the electromagnetic repulsion simulation model is a simulation model of an electromagnetic repulsion mechanism, the circuit breaker operating simulation model is a simulation model of a circuit breaker operating mechanism, and the tripping operation is completed by the electromagnetic repulsion mechanism and the circuit breaker operating mechanism cooperatively controlling the air gap size between a repulsion disc and a tripping coil in the electromagnetic repulsion mechanism; The control force updating module is configured to perform a control force updating step of: obtaining, by the electromagnetic repulsion simulation component, a control force generated by the electromagnetic repulsion simulation model based on a preconfigured initial air gap size between the repulsion disc and the tripping coil at a current time step according to the initial air gap size at the current time step, and sending the control force to the circuit breaker operating simulation component; The air gap size updating module is configured to obtain, by the circuit breaker operating simulation component, an air gap size between the repulsion disc and the tripping coil at the current time step when the control force is taken as a load force of the circuit breaker operating simulation model. The iteration module is configured to, in a case where the repulsion disc does not reach a preset position according to the air gap size, send the air gap size to the electromagnetic repulsion simulation component, control the electromagnetic repulsion simulation component to take the air gap size as a new initial air gap size, update a next time step to the current time step, and return to the control force updating step until the repulsion disc reaches the preset position. The tripping time determination module is configured to take the current time step when the repulsion disc reaches the preset position as the tripping time of the circuit breaker.

8. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that, The processor implements the steps of the method of any one of claims 1 to 6 when executing the computer program.

9. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program implements the steps of the method of any one of claims 1 to 6 when executed by the processor.

10. A computer program product comprising a computer program, characterized in that, The computer program implements the steps of the method of any one of claims 1 to 6 when executed by the processor.

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