A transmission tower continuous collapse prevention system and method

Abstract

A system and method for preventing a transmission tower from continuously collapsing, comprising: an acceleration sensor installed at a measuring point of a transmission tower, collecting acceleration data of the transmission tower, obtaining acceleration data corresponding to the sampling moment and sending it to a finite element analysis module; the finite element analysis module installed on a computer, for judging whether to send a disconnection instruction according to the acceleration data; a wire breaker installed on a cross arm of the transmission tower, cutting off the transmission wires between the transmission towers according to the disconnection instruction; the acceleration sensor is in communication connection with the finite element analysis module and the wire breaker. The acceleration sensor and the finite element analysis module in this scheme obtain the stress conditions of the transmission tower and perform a hazard analysis. Once in a dangerous state, the wire breaker cuts off the wire connection between the transmission tower and the adjacent transmission tower according to the disconnection instruction, thereby preventing the continuous collapse of the transmission tower caused by the pulling of the wires, and greatly reducing the probability of the transmission towers collapsing in series.

Description

Technical Field

[0001] The invention relates to the field of transmission tower design, and in particular to a transmission tower progressive collapse prevention system and method. Background Art

[0002] In a transmission line, if a conductor in a certain span breaks or becomes loose, since the conductors in the adjacent spans are not cut off in time, the tension of the conductors on the left and right sides of the hanging point will be very different. The huge unbalanced force will bring a large load to the transmission tower, and the transmission tower will often fall down. Therefore, in many disaster pictures, after the transmission tower has completely collapsed, there are still many conductors firmly attached to the transmission tower. After the transmission tower falls, all the conductors in the span will relax, and the tension will drop sharply, causing the adjacent transmission towers to fall down. Such a vicious cycle often leads to the collapse of transmission towers in the entire tension section.

[0003] Thus, during post-disaster reconstruction, these collapsed transmission towers need to be re-erected, and power supply can only be restored after the erection is completed. This seriously affects the power supply in the disaster area and increases the cost of rebuilding the transmission lines.

[0004] At present, the probability of string collapse is mainly reduced by increasing the design load of the transmission tower and increasing the geometric specifications of the load-bearing components such as the main diagonal material of the transmission tower. However, in places where hurricanes occur irregularly, it is unreasonable to design the load-bearing components of the transmission tower according to the design load under the occasional maximum wind speed, which will increase the cost of the transmission tower line to an unbearable level. Summary of the invention

[0005] In order to solve the problem in the prior art that increasing the load of the receiving components of the transmission tower is not enough to prevent the continuous collapse of the transmission tower caused by the destruction of the transmission line by natural conditions, the present invention provides a transmission tower continuous collapse prevention system and method.

[0006] The technical solution provided by the present invention is: a transmission tower continuous collapse prevention system, the system comprising: an acceleration sensor, a finite element analysis module and a plurality of wire breakers;

[0007] The acceleration sensor is installed at a measuring point of the transmission tower, collects acceleration data of the transmission tower, obtains acceleration data corresponding to a sampling time, and sends the acceleration data to the finite element analysis module;

[0008] The finite element analysis module is installed on the computer and is used to determine whether to send a disconnection instruction according to the acceleration data;

[0009] The line breaker is installed on the cross arm of the transmission tower, and cuts off the transmission wires between the transmission towers according to the line breaking instruction;

[0010] The acceleration sensor is communicatively connected with the finite element analysis module and the wire breaker.

[0011] Preferably, the acceleration sensor comprises:

[0012] Acquisition module and data transmission module;

[0013] The acquisition module is installed at a measuring point of the transmission tower, and acquires acceleration data of the transmission tower according to a preset sampling time to obtain acceleration data corresponding to the sampling time;

[0014] The data transmission module transmits the acceleration data corresponding to the sampling time to the finite element analysis module.

[0015] Preferably, the finite element analysis module includes:

[0016] Modeling submodule;

[0017] The modeling submodule is used to construct and update the geometric model of the transmission tower and conductor to be tested, and generate a finite element model through beam unit force analysis and cable unit force analysis, and set the degree of freedom of the preset position on the finite element model to a preset value to obtain an initial finite element model.

[0018] Preferably, the finite element analysis module further includes: a calculation submodule, a judgment submodule and a priority module;

[0019] The calculation submodule adds the acceleration data corresponding to the sampling moment to the initial finite element model to obtain the axial force and bending moment on the finite element model, and calculates the current stress of the transmission tower according to the axial force and bending moment;

[0020] The judgment submodule judges whether the current stress is less than a preset dangerous critical value. If so, the transmission tower is in a safe state and no disconnection instruction is issued; otherwise, the transmission tower is in a dangerous state and a disconnection instruction is issued;

[0021] The priority module is connected to all the disconnectors and is used to send the disconnection instruction to the disconnector with the highest priority according to the priority order of the disconnectors on the cross arm of the transmission tower.

[0022] Preferably, the axial force is calculated by the following formula:

[0023] N=ma

[0024] Wherein, N is the axial force, m is the mass of the force-bearing part of the transmission tower, and a is the acceleration data collected by the acceleration sensor.

[0025] Preferably, the current stress of the transmission tower is calculated by the following formula:

[0026]

[0027] Where, f is the current stress of the transmission tower, γ is the section plastic development coefficient, W is the section elastic modulus, N′ E is the Euler critical bearing capacity after considering the resistance partial factor, M is the resultant bending moment, N is the axial force, and β is the equivalent bending moment coefficient.

[0028] Preferably, the priority order of the disconnectors on the crossarms of the transmission tower includes:

[0029] Based on the position of the disconnector on the cross arm of the transmission tower, the priorities are set in descending order from top to bottom and from inside to outside.

[0030] Preferably, the wire breaker is installed between each transmission wire hanging point of the transmission tower cross arm.

[0031] A method for preventing a transmission tower from progressive collapse, comprising:

[0032] The acceleration sensor installed at the measuring point of the transmission tower collects the acceleration data of the transmission tower, obtains the acceleration data corresponding to the sampling time, and sends it to the finite element analysis module in real time;

[0033] The finite element analysis module installed on the computer receives the acceleration data corresponding to the sampling time in real time, and judges the dangerous state of the transmission tower according to the acceleration data. When it is judged that the transmission tower is in a dangerous state, a disconnection instruction is sent to the disconnector, otherwise, no instruction is sent;

[0034] The wire breaker installed on the cross arm of the transmission tower cuts off the transmission wires between the transmission towers according to the wire breaking instruction.

[0035] Preferably, the acceleration sensor installed at the measuring point of the transmission tower collects the acceleration data of the transmission tower, obtains the acceleration data corresponding to the sampling time, and sends it to the finite element analysis module in real time, including:

[0036] The acquisition module in the acceleration sensor acquires the acceleration data of the transmission tower according to a preset sampling time to obtain the acceleration data corresponding to the sampling time;

[0037] The data transmission module in the acceleration sensor transmits the acceleration data corresponding to the sampling time to the finite element analysis module.

[0038] Preferably, the finite element analysis module installed on the computer receives the acceleration data corresponding to the sampling time in real time, and determines the dangerous state of the transmission tower according to the acceleration data, and the method also includes:

[0039] Use the modeling submodule in the finite element analysis module to build and update the geometric model of the transmission tower and conductor to be tested, and generate a finite element model through beam unit force analysis and cable unit force analysis;

[0040] The degree of freedom of a preset position on the finite element model is set to a preset value to obtain an initial finite element model.

[0041] Preferably, the finite element analysis module installed on the computer receives the acceleration data corresponding to the sampling time in real time, and determines the dangerous state of the transmission tower according to the acceleration data, including:

[0042] Using a calculation submodule in a finite element analysis module, the acceleration data corresponding to the sampling moment is added to the initial finite element model to obtain the axial force and bending moment on the finite element model, and the current stress of the transmission tower is calculated based on the axial force and bending moment;

[0043] The judgment submodule in the finite element analysis module determines whether the current stress is less than a preset dangerous critical value. If so, the transmission tower is in a safe state and no disconnection instruction is issued; otherwise, the transmission tower is in a dangerous state and a disconnection instruction is issued;

[0044] The disconnection instruction is sent to the disconnector on the cross arm of the transmission tower with the highest priority according to the preset priority order through the priority module in the finite element analysis module.

[0045] Preferably, the axial force is calculated by the following formula:

[0046] N=ma

[0047] Wherein, N is the axial force, m is the mass of the force-bearing part of the transmission tower, and a is the velocity data collected by the acceleration sensor.

[0048] Preferably, the current stress of the transmission tower is calculated by the following formula:

[0049]

[0050] Where, f is the current stress of the transmission tower, γ is the section plastic development coefficient, W is the section elastic modulus, N′ E is the Euler critical bearing capacity after considering the resistance partial factor, M is the resultant bending moment, N is the axial force, and β is the equivalent bending moment coefficient.

[0051] Preferably, the priority order of the disconnectors on the crossarms of the transmission tower includes:

[0052] Based on the position of the disconnector on the cross arm of the transmission tower, the priorities are set in descending order from top to bottom and from inside to outside.

[0053] Compared with the prior art, the present invention has the following beneficial effects:

[0054] The technical solution provided by the present invention includes: an acceleration sensor, a finite element analysis module and a plurality of wire breakers; the acceleration sensor is installed at the measuring point of the transmission tower to collect the acceleration data of the transmission tower, obtain the acceleration data corresponding to the sampling time and send it to the finite element analysis module; the finite element analysis module is installed on a computer to determine whether to send a wire break instruction according to the acceleration data; the wire breakers are installed on the cross arm of the transmission tower to cut off the transmission wires between the transmission towers according to the wire break instruction; the acceleration sensor is connected to the finite element analysis module and the wire breakers for communication. The acceleration sensor and the finite element analysis module in this solution obtain the stress conditions of the transmission tower and perform a hazard analysis. Once in a dangerous state, the wire breaker cuts off the wire connection between the transmission tower and the adjacent transmission tower according to the wire break instruction, preventing the continuous collapse of the transmission towers due to the pulling of the wires, and greatly reducing the probability of the transmission towers collapsing.

[0055] In addition, the present invention has only three hardware devices, namely, an acceleration sensor, a finite element analysis module and a wire breaker, and has a simple structure and low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 It is a structural diagram of the transmission tower continuous collapse prevention system of the present invention;

[0057] Figure 2 A power transmission line diagram in a normal state of an embodiment of the present invention;

[0058] Figure 3 A diagram of a power transmission line in a disconnected state according to an embodiment of the present invention;

[0059] Figure 4 This is the installation diagram of the cutter in this invention. DETAILED DESCRIPTION

[0060] In order to better understand the present invention, the content of the present invention is further described below in conjunction with the accompanying drawings and examples.

[0061] Embodiment 1:

[0062] This embodiment provides a transmission tower continuous collapse prevention system, the system structure diagram is as follows Figure 1 shown.

[0063] The present invention is mainly composed of the following three components:

[0064] Accelerometers, finite element analysis modules, and multiple wire breakers;

[0065] The acceleration sensor is installed at a measuring point of the transmission tower, collects acceleration data of the transmission tower, obtains acceleration data corresponding to a sampling time, and sends the acceleration data to the finite element analysis module;

[0066] The finite element analysis module is installed on the computer and is used to determine whether to send a disconnection instruction according to the corresponding curve;

[0067] The line breaker is installed on the cross arm of the transmission tower, and cuts off the transmission wires between the transmission towers according to the line breaking instruction;

[0068] The acceleration sensor is communicatively connected with the finite element analysis module and the wire breaker.

[0069] Component 1: Accelerometer of a transmission tower;

[0070] The acquisition module in the acceleration sensor of the transmission tower is mainly used to detect the corresponding relationship between the acceleration and time of the transmission tower and the conductor at the measuring point, obtain the relationship curve, and send it to the finite element analysis module through the data transmission module, so as to provide a basis for determining the stress state of each stress-bearing component of the transmission tower and the conductor through finite element calculation.

[0071] Component 2: Finite element analysis module;

[0072] Although the stress state of the transmission tower can be detected by monitoring the strain or setting a dynamometer at the conductor hanging point, this approach has the following disadvantages:

[0073] It is necessary to install multiple strain gauges on each component of the transmission tower to calculate the stress state of the transmission tower. The transmission tower has thousands of components, which is very expensive. In addition, the life and reliability of the strain gauge are far inferior to those of the acceleration sensor.

[0074] The conductor force gauge is expensive and heavy, and the installation and maintenance costs are high when it is set on the top of the tower.

[0075] Therefore, this patent uses the data of the acceleration sensor as the boundary condition, and uses the finite element software to calculate the stress state of the entire transmission tower and the conductor, determines the stress condition of the main stress-bearing components in the transmission tower and the conductor based on the information of a finite number of acceleration sensors, and evaluates the safety of the entire transmission tower, accurately determines the stress state of the transmission tower, and accurately determines when it is necessary to cut off part of the conductor to ensure the safety of the entire transmission tower.

[0076] The processing steps of the finite element analysis module are as follows:

[0077] (1) Establish the geometric model of transmission towers and conductors,

[0078] (2) Generate finite element models of discrete transmission towers and transmission lines using beam unit force analysis and cable unit force analysis respectively;

[0079] (3) Input the constitutive relationship of the transmission tower and the conductor, and set the displacement degrees of freedom at the four nodes of the tower foot to preset values. For example, the preset value can be 0, and the initial finite element model is obtained. At this time, the initial finite element model is for applying force.

[0080] (4) The acceleration sensor measures the acceleration versus time curve and uses wireless sensing technology to send the test results to a computer.

[0081] (5) The corresponding curves of acceleration and time at each monitoring point on the transmission tower are applied to the finite element nodes at the corresponding positions on the transmission tower.

[0082] (6) Turn on the large deformation and large displacement switches of the finite element calculation software and carry out finite element transient analysis calculations.

[0083] Component 3: Wire breaker;

[0084] The wire breaker is installed on the cross arm of the transmission tower, such as Figure 4 shown.

[0085] According to the calculation results of the finite element analysis software, after the wire breaking plan is determined, a wire breaking command is issued, and the wire breaker executes the command to cut off the relevant wires. The wire breaking plan is as follows:

[0086] (1) Using the results of finite element transient analysis, the axial force N and bending moment M of the main and diagonal materials of the transmission tower are extracted; the axial force is calculated by the following formula:

[0087] N=ma

[0088] Wherein, N is the axial force, m is the mass of the force-bearing part of the transmission tower, and a is the acceleration data collected by the acceleration sensor.

[0089] (2) Use the following formula to determine the safety of the main material and the diagonal material. When the design stress of the main material reaches 0.85 times, it means that the transmission tower is no longer safe and the finite element line break calculation should be started.

[0090]

[0091] Among them, γ is the section plastic development coefficient, W is the section elastic modulus, N′ E is the Euler critical bearing capacity after considering the resistance partial coefficient, M is The resultant bending moment is: 1x 、M 2x 、M 1y 、M 2y is the maximum bending moment within the calculated component end range, N is the axial pressure on the component, β is the equivalent bending moment coefficient, and f yis the design value of steel strength.

[0092] (3) The priority module in the finite element analysis module cuts the wires in the order from bottom to top and from inside to outside. The reason for cutting from bottom to top is that if the wire above the transmission tower is cut first, it may fall and hang on the wire below, which will cause the wire below to short-circuit, lose power transmission capacity and increase the gravity load of the wire below; the reason for cutting from inside to outside is that the internal wire is close to the central axis of the transmission tower. Under the same tension, the bending moment it generates on the transmission tower will be much smaller.

[0093] (4) Only one conductor in a span is cut each time. After the cutting is completed, the conductor is deleted from the finite element model, and a new model is used to perform transient large deformation and large displacement finite element analysis. The axial force and bending moment of the main diagonal material of the transmission tower are extracted from the calculation results, and the formula is used to judge its safety.

[0094] (5) If the calculation results show that every transmission tower on the tower-line system is safe after the wire section is cut, there is no need to cut out the remaining wires. Otherwise, cut the relevant wires in the order in (3) until the calculation results show that every transmission tower will not collapse.

[0095] In actual situations, under normal circumstances, the transmission line diagram is as follows Figure 2 As shown; a transmission tower anti-continuous collapse device in this embodiment is applied to allow the secondary components in the transmission tower system to be partially damaged under extreme loads. In this embodiment, the finite element analysis module sends a disconnection instruction to the disconnector to cut the connecting wires between the transmission towers. The effect after cutting is shown in the figure Figure 3 As shown, the main components are ensured to be intact and the damage caused by the disaster is reduced.

[0096] Embodiment 2:

[0097] This embodiment provides a method for preventing a transmission tower from continuously collapsing, comprising:

[0098] The acceleration sensor installed at the measuring point of the transmission tower collects the acceleration data of the transmission tower, obtains the acceleration data corresponding to the sampling time, and sends it to the finite element analysis module in real time;

[0099] The finite element analysis module installed on the computer receives the acceleration data corresponding to the sampling time in real time, and judges the dangerous state of the transmission tower according to the acceleration data. When it is judged that the transmission tower is in a dangerous state, a disconnection instruction is sent to the disconnector, otherwise, no instruction is sent;

[0100] The wire breaker installed on the cross arm of the transmission tower cuts off the transmission wires between the transmission towers according to the wire breaking instruction.

[0101] The acceleration sensor installed at the measuring point of the transmission tower collects the acceleration data of the transmission tower, obtains the acceleration data corresponding to the sampling time, and sends it to the finite element analysis module in real time, including:

[0102] The acquisition module in the acceleration sensor acquires the acceleration data of the transmission tower according to a preset sampling time to obtain the acceleration data corresponding to the sampling time;

[0103] The data transmission module in the acceleration sensor transmits the acceleration data corresponding to the sampling time to the finite element analysis module.

[0104] The finite element analysis module installed on the computer receives the acceleration data corresponding to the sampling time in real time, and determines the dangerous state of the transmission tower according to the acceleration data, and the method also includes:

[0105] Use the modeling submodule in the finite element analysis module to build and update the geometric model of the transmission tower and conductor to be tested, and generate a finite element model through beam unit force analysis and cable unit force analysis;

[0106] The degree of freedom of a preset position on the finite element model is set to a preset value to obtain an initial finite element model.

[0107] The finite element analysis module installed on the computer receives the acceleration data corresponding to the sampling time in real time, and determines the dangerous state of the transmission tower according to the acceleration data, including:

[0108] Using a calculation submodule in a finite element analysis module, the acceleration data corresponding to the sampling moment is added to the initial finite element model to obtain the axial force and bending moment on the finite element model, and the current stress of the transmission tower is calculated based on the axial force and bending moment;

[0109] The judgment submodule in the finite element analysis module determines whether the current stress is less than a preset dangerous critical value. If so, the transmission tower is in a safe state and no disconnection instruction is issued; otherwise, the transmission tower is in a dangerous state and a disconnection instruction is issued;

[0110] The disconnection instruction is sent to the disconnector on the cross arm of the transmission tower with the highest priority according to the preset priority order through the priority module in the finite element analysis module.

[0111] The axial force is calculated by the following formula:

[0112] N=ma

[0113] Wherein, N is the axial force, m is the mass of the force-bearing part of the transmission tower, and a is the velocity data collected by the acceleration sensor.

[0114] The current stress of the transmission tower is calculated by the following formula:

[0115]

[0116] Where, f is the current stress of the transmission tower, γ is the section plastic development coefficient, W is the section elastic modulus, N′ E is the Euler critical bearing capacity after considering the resistance partial factor, M is the resultant bending moment, N is the axial force, and β is the equivalent bending moment coefficient.

[0117] The priority order of the disconnectors on the crossarms of the transmission towers includes:

[0118] Based on the position of the disconnector on the cross arm of the transmission tower, the priorities are set in descending order from top to bottom and from inside to outside.

[0119] Obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0120] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0121] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0122] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0123] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0124] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of the claims of the present invention to be approved.

Claims

1. A transmission tower continuous collapse prevention system, characterized in that: The system comprises: Accelerometers, finite element analysis modules, and multiple wire breakers; The acceleration sensor is installed at a measuring point of the transmission tower, collects acceleration data of the transmission tower, obtains acceleration data corresponding to a sampling time, and sends the acceleration data to the finite element analysis module; The finite element analysis module is installed on the computer and is used to determine whether to send a disconnection instruction according to the acceleration data; The line breaker is installed on the cross arm of the transmission tower, and cuts off the transmission wires between the transmission towers according to the line breaking instruction; The acceleration sensor is communicatively connected with the finite element analysis module and the wire breaker; The finite element analysis module comprises: Modeling submodule; The modeling submodule is used to construct and update the geometric model of the transmission tower and the conductor to be tested, generate a finite element model through beam unit force analysis and cable unit force analysis, and set the degree of freedom of the preset position on the finite element model to a preset value to obtain an initial finite element model; The finite element analysis module also includes: a calculation submodule, a judgment submodule and a priority module; The calculation submodule adds the acceleration data corresponding to the sampling moment to the initial finite element model to obtain the axial force and bending moment on the finite element model, and calculates the current stress of the transmission tower according to the axial force and bending moment; The judgment submodule judges whether the current stress is less than a preset dangerous critical value. If so, the transmission tower is in a safe state and no disconnection instruction is issued; otherwise, the transmission tower is in a dangerous state and a disconnection instruction is issued; The priority module is connected to all the disconnectors and is used to send the disconnection instruction to the disconnector with the highest priority according to the priority order of the disconnectors on the cross arm of the transmission tower; The axial force is calculated by the following formula: N=ma Wherein, N is the axial force, m is the mass of the force-bearing part of the transmission tower, and a is the acceleration data collected by the acceleration sensor; The current stress of the transmission tower is calculated by the following formula: Wherein, f is the current stress of the transmission tower, is the cross-section plastic development coefficient, W is the cross-section elastic modulus, is the Euler critical bearing capacity after considering the resistance partial coefficient, M is the resultant bending moment, N is the axial force, is the equivalent bending moment coefficient.

2. The system according to claim 1, characterized in that The acceleration sensor comprises: Acquisition module and data transmission module; The acquisition module is installed at a measuring point of the transmission tower, and acquires acceleration data of the transmission tower according to a preset sampling time to obtain acceleration data corresponding to the sampling time; The data transmission module transmits the acceleration data corresponding to the sampling time to the finite element analysis module.

3. The system according to claim 1, characterized in that The priority order of the disconnectors on the crossarms of the transmission towers includes: Based on the position of the disconnector on the cross arm of the transmission tower, the priorities are set in descending order from top to bottom and from inside to outside.

4. The system according to claim 1, characterized in that The wire breaker is installed between each transmission conductor hanging point on the cross arm of the transmission tower.

5. A method for preventing continuous collapse of a transmission tower, characterized in that: include: The acceleration sensor installed at the measuring point of the transmission tower collects the acceleration data of the transmission tower, obtains the acceleration data corresponding to the sampling time, and sends it to the finite element analysis module in real time; The finite element analysis module installed on the computer receives the acceleration data corresponding to the sampling time in real time, and judges the dangerous state of the transmission tower according to the acceleration data. When it is judged that the transmission tower is in a dangerous state, a disconnection instruction is sent to the disconnector, otherwise, no instruction is sent; A wire breaker installed on a cross arm of a transmission tower cuts off the transmission wires between the transmission towers according to the wire breaking instruction; The finite element analysis module installed on the computer receives the acceleration data corresponding to the sampling time in real time, and determines the dangerous state of the transmission tower according to the acceleration data, and the method also includes: Use the modeling submodule in the finite element analysis module to build and update the geometric model of the transmission tower and conductor to be tested, and generate a finite element model through beam unit force analysis and cable unit force analysis; Setting the degree of freedom of a preset position on the finite element model to a preset value to obtain an initial finite element model; The finite element analysis module installed on the computer receives the acceleration data corresponding to the sampling time in real time, and determines the dangerous state of the transmission tower according to the acceleration data, including: Using a calculation submodule in a finite element analysis module, the acceleration data corresponding to the sampling moment is added to the initial finite element model to obtain the axial force and bending moment on the finite element model, and the current stress of the transmission tower is calculated based on the axial force and bending moment; The judgment submodule in the finite element analysis module determines whether the current stress is less than a preset dangerous critical value. If so, the transmission tower is in a safe state and no disconnection instruction is issued; otherwise, the transmission tower is in a dangerous state and a disconnection instruction is issued; The disconnection instruction is sent to the disconnector on the cross arm of the transmission tower with the highest priority according to the preset priority order through the priority module in the finite element analysis module; The axial force is calculated by the following formula: N=ma Wherein, N is the axial force, m is the mass of the force-bearing part of the transmission tower, and a is the acceleration data collected by the acceleration sensor; The current stress of the transmission tower is calculated by the following formula: Wherein, f is the current stress of the transmission tower, is the cross-section plastic development coefficient, W is the cross-section elastic modulus, is the Euler critical bearing capacity after considering the resistance partial coefficient, M is the resultant bending moment, N is the axial force, is the equivalent bending moment coefficient.

6. The method according to claim 5, characterized in that The acceleration sensor installed at the measuring point of the transmission tower collects the acceleration data of the transmission tower, obtains the acceleration data corresponding to the sampling time, and sends it to the finite element analysis module in real time, including: The acquisition module in the acceleration sensor acquires the acceleration data of the transmission tower according to a preset sampling time to obtain the acceleration data corresponding to the sampling time; The data transmission module in the acceleration sensor transmits the acceleration data corresponding to the sampling time to the finite element analysis module.

7. The method according to claim 5, characterized in that The priority order of the disconnectors on the crossarms of the transmission towers includes: Based on the position of the disconnector on the cross arm of the transmission tower, the priorities are set in descending order from top to bottom and from inside to outside.

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