Method and system for improving reliability of catenary system under icing flutter condition

Abstract

The application discloses an icing dance condition-based contact net system reliability improvement method and system, and the method comprises the following steps: combining an expert evaluation method to establish a contact net system reliability calculation model; evaluating the actual reliability of the contact net system after icing dance; analyzing the influence of span, wire tension, dropper spacing and structure height on the contact net dance amplitude to obtain a contact net system parameter optimization scheme; analyzing the influence of the adoption of a bow-shaped positioner, adjustment joint electrical connection and additional wire V-shaped suspension on the contact net dance amplitude to obtain a contact net structure adjustment scheme; analyzing the influence of the adoption of a spacer, a damping hammer and an anti-dance whip on the contact net dance amplitude to obtain a contact net equipment setting scheme; forming a contact net system reliability improvement technical scheme under the icing dance condition, evaluating the contact net reliability improvement effect after the adoption of the improvement technical scheme; and the application improves the active defense capability and safety level of the system.

Description

Technical Field

[0001] This invention belongs to the field of condition assessment technology, and in particular relates to a method and system for improving the reliability of overhead contact system under icing and galloping conditions. Background Technology

[0002] The overhead contact system is the core power supply facility for electrified railways. Low-frequency, high-amplitude vibrations caused by icing and galloping can easily lead to fatigue damage to the contact system equipment, wire breakage, and even power outages and train accidents, posing a major safety hazard to railway operations in cold regions and areas prone to freezing rain during winter. Current protective measures for this problem mostly focus on local device improvements or empirical reinforcement, but these measures still have significant limitations: First, there is a lack of a comprehensive quantitative assessment model based on system reliability theory, making it difficult to comprehensively reflect the correlation between equipment status and the system; second, insufficient utilization of post-galloping fault data, in-depth analysis of fault patterns, and a lack of basis for preventative optimization; third, parameter adjustments and structural improvements rely heavily on experience, lacking refined simulation verification based on galloping mechanisms, making it impossible to accurately predict the suppression effect of different measures on galloping; and fourth, after the implementation of improvement schemes, it is difficult to quantitatively assess their actual improvement effect on system reliability. Therefore, a systematic, model-based, and data-driven approach is needed to achieve a shift from passive response to proactive prevention, and from local repairs to overall optimization, thereby improving the operational reliability of the overhead contact system under icing and galloping conditions. Summary of the Invention

[0003] To address the problems existing in the background art, the present invention aims to provide a method for improving the reliability of a catenary system under icing and galloping conditions, the method comprising the following steps:

[0004] For the overhead contact line in sections with icing and dancing, a reliability calculation model for the overhead contact line system is established based on the correlation between the overhead contact line and equipment, combined with the expert evaluation method.

[0005] Collect overhead contact line fault data after ice-induced galloping, obtain the failure rate of overhead contact line equipment under ice-induced galloping conditions, and assess the actual reliability of the overhead contact line system after ice-induced galloping. ;

[0006] By combining the icing thickness of the overhead contact line with wind speed and direction, a finite element simulation model of the overhead contact line icing galloping was established. The influence of span, wire tension, dropper spacing and structural height on the amplitude of overhead contact line galloping was analyzed, and an optimization scheme for the parameters of the overhead contact line system was obtained.

[0007] Based on the established finite element simulation model of the catenary icing and galloping, the effects of using bow-shaped positioners, adjusting joint electrical connections, and adding V-shaped suspension wires on the amplitude of catenary galloping are analyzed, and catenary structure adjustment schemes are obtained.

[0008] Based on the established finite element simulation model of the catenary icing and galloping, the influence of additional conductors using spacers, vibration dampers, and anti-galloping whips on the amplitude of the catenary galloping is analyzed, and the catenary equipment setting scheme is obtained.

[0009] Based on the obtained parameter optimization scheme, structural adjustment scheme, and equipment setting scheme of the overhead contact system, a reliability improvement technical scheme for the overhead contact system under icing and galloping conditions is formulated, and the reliability of the overhead contact system after icing and galloping using the reliability improvement technical scheme is obtained. By and Ideal reliability of the overhead contact system A comparative analysis was conducted to evaluate the effectiveness of the improved contact network reliability after adopting the upgraded technical solution.

[0010] Furthermore, by and Ideal reliability of the overhead contact system The method for comparative analysis and evaluation of the effectiveness of the improved contact network reliability after adopting the upgraded technical solution is as follows:

[0011] Determine the first difference If the value is greater than 0, it indicates that the improved technical solution has played a role in improving the reliability of the overhead contact system.

[0012] Calculate the second difference The smaller the specific value, the more effective the technical solution is.

[0013] Furthermore, for the contact network in sections experiencing icing and galloping, the method for establishing a reliability calculation model for the contact network system based on the correlation between the contact network and equipment, combined with expert evaluation, is as follows:

[0014] The expert evaluation method was used to score the complexity, importance, working time and environmental conditions of nine types of catenary equipment in the ice-covered and dancing sections of the catenary anchorage. These included supports and foundations, positioning devices, elastic suspenders, electrical connections, additional conductors, anchoring devices, droppers, central anchors and disconnecting switches.

[0015] Calculate the total expert evaluation score for the i-th type of overhead contact line equipment. , where n i C represents the number of type i contact wire devices within an anchor section. i For the complexity of the i-th type of overhead contact line equipment, I i For the importance of the i-th type of overhead contact line equipment, T i E represents the working time of the i-th type of overhead contact line equipment. i Environmental conditions for Class i contact network equipment;

[0016] Then the scoring coefficient of the i-th type of overhead contact line equipment for: ;

[0017] Constructing a reliability calculation model for the overhead contact system: reliability of the overhead contact system within an anchor section for: ; where f i The failure rate of the i-th type of overhead contact line equipment; The failure rate of the overhead contact system.

[0018] Furthermore, the reliability of the overhead contact system after icing and galloping, which employs reliability enhancement technologies, is obtained. The method is as follows:

[0019] Compare the collected data on the i-th type of overhead contact line equipment at the icing galloping frequency f a With amplitude A a The failure rate is calculated based on the following: For the i-th type of overhead contact line equipment, after adopting the improved technical solution, at the icing and galloping frequency f... e With amplitude A e Failure rate : ;

[0020] Substitute the calculated failure rates of various overhead contact line devices after adopting the improved technical solutions into the overhead contact line system reliability calculation model to calculate the reliability of the overhead contact line system after icing and galloping following the adoption of the improved technical solutions. :

[0021] .

[0022] Furthermore, data on overhead contact line faults after icing and galloping were collected, and the failure rate of overhead contact line equipment under icing and galloping conditions was obtained to assess the actual reliability of the overhead contact line system after icing and galloping. The method is as follows:

[0023] If the number of faulty devices in the ice-induced galloping zone is statistically analyzed, then the actual failure rate fa of the i-th type of equipment due to ice-induced galloping is obtained. i The actual number of faults caused by icing and dancing of equipment of type i is divided by the total number of equipment of type i in the icing and dancing section.

[0024] The actual failure rate fa obtained i Substituting into the overhead contact system reliability calculation model, calculate the actual reliability of the overhead contact system after icing and galloping under the actual icing amplitude Aa. : .

[0025] Furthermore, the ideal reliability of the overhead contact system The method for obtaining it is as follows:

[0026] The generalized stress S of the i-th type of contact wire in an ideal state i With generalized strength The distribution type conforms to a normal distribution: , ,in, Let be the average stress of the i-th type of equipment. Let be the average strength of the i-th type of equipment. Let be the standard deviation of stress for the i-th type of equipment. Let be the standard deviation of the strength of the i-th type of equipment;

[0027] The ideal reliability of the i-th type of overhead contact line equipment under ideal design conditions. It can be calculated using the formula: ,in, The random variable in the standard normal distribution does not exceed The cumulative probability;

[0028] Under ideal design conditions, the failure rate of the i-th type of overhead contact line equipment is 1-R. i ;

[0029] Based on the obtained contact network system reliability calculation model, the ideal reliability of the contact network system under ideal design conditions within an anchor section is obtained. for: .

[0030] A reliability improvement system for overhead contact lines under icing and galloping conditions includes:

[0031] The overhead contact system reliability calculation model construction module is used to establish an overhead contact system reliability calculation model for ice-covered and dancing sections of the overhead contact system based on the correlation between the overhead contact system and equipment, combined with the expert evaluation method.

[0032] The module for acquiring the actual reliability of the overhead contact system after icing and galloping is used to collect fault data of the overhead contact system after icing and galloping, obtain the failure rate of the overhead contact system equipment under icing and galloping conditions, and evaluate the actual reliability of the overhead contact system after icing and galloping. ;

[0033] The overhead contact system parameter optimization scheme acquisition module is used to combine the ice thickness of the overhead contact system with wind speed and wind direction to establish a finite element simulation calculation model of the ice-covered galloping of the overhead contact system, analyze the influence of span, wire tension, dropper spacing and structural height on the galloping amplitude of the overhead contact system, and obtain the overhead contact system parameter optimization scheme.

[0034] The overhead contact line structure adjustment scheme acquisition module is used to analyze the influence of using bow-shaped positioners, adjusting joint electrical connections, and adding V-shaped suspension of conductors on the amplitude of overhead contact line galloping based on the established finite element simulation calculation model of overhead contact line icing and galloping, and to obtain the overhead contact line structure adjustment scheme.

[0035] The overhead contact line equipment setup scheme acquisition module is used to analyze the impact of additional conductors using spacers, vibration dampers, and anti-galling whips on the amplitude of overhead contact line icing and galloping based on the established finite element simulation calculation model of overhead contact line icing and galloping, and to obtain the overhead contact line equipment setup scheme.

[0036] The overhead contact line reliability improvement effect evaluation module is used to formulate a technical solution for improving the reliability of the overhead contact line system under icing and galloping conditions based on the obtained optimization schemes, structural adjustment schemes, and equipment setting schemes of the overhead contact line system parameters, and to obtain the reliability of the overhead contact line system after icing and galloping using the reliability improvement technical solution. By and Ideal reliability of the overhead contact system A comparative analysis was conducted to evaluate the effectiveness of the improved contact network reliability after adopting the upgraded technical solution.

[0037] Furthermore, the present invention adopts the following technical solution:

[0038] A non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method for improving the reliability of a catenary system under icing and galloping conditions as described above.

[0039] Furthermore, the present invention adopts the following technical solution:

[0040] An electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method for improving the reliability of the overhead contact system under icing and galloping conditions as described above.

[0041] The beneficial technical effect of this invention lies in the fact that by constructing a complete technical system for improving the reliability of the overhead contact system under icing and galloping conditions, it effectively improves the operating status of the overhead contact system in extreme environments.

[0042] (1) A scientific quantitative assessment of system reliability has been achieved: Based on the correlation between the contact network and equipment and the expert evaluation method, a contact network system reliability calculation model that can comprehensively consider the inherent reliability of equipment, the correlation of system structure and the actual operating environment has been constructed.

[0043] (2) An optimization path combining data-driven and simulation verification was established: by collecting and statistically analyzing historical fault data, the weak links of the system under galloping conditions were accurately identified; at the same time, the established finite element simulation model was used to accurately simulate the influence of different parameters, structures and anti-galloping equipment on the galloping amplitude.

[0044] (3) Provides a multi-dimensional and combinable comprehensive improvement scheme: The method of this invention systematically analyzes and designs schemes from three dimensions: system parameter optimization, structural adjustment and special equipment setting, and conducts multi-scheme combination comparison through orthogonal experiments and other methods;

[0045] (4) A complete technical closed loop from assessment, diagnosis to optimization and verification has been formed: This invention integrates a systematic method of reliability assessment, fault analysis, simulation optimization and effect prediction, forming a complete reliability improvement workflow, which has important application value for improving the operational safety and maintenance efficiency of electrified railways under severe weather conditions. Attached Figure Description

[0046] Figure 1 This is a schematic flowchart of a method for improving the reliability of a catenary system under icing and galloping conditions, provided in an embodiment of the present invention. Detailed Implementation

[0047] This invention discloses a method and system for improving the reliability of a catenary system under icing and galloping conditions. The method includes: constructing a reliability calculation model for the catenary system based on the correlation between the catenary and equipment and expert evaluation; collecting icing and galloping fault data and assessing actual reliability; establishing a finite element simulation model of the catenary under icing and galloping conditions, analyzing the influence of system parameters such as span and tension, as well as structural adjustments such as bow-shaped positioners and V-shaped suspensions, and equipment settings such as spacers and anti-galloping whips on the galloping amplitude, and forming optimization schemes for each; combining the above schemes to form a technical improvement scheme, and quantitatively evaluating the system reliability improvement effect after the scheme is implemented; this invention realizes the scientific assessment of the reliability of the catenary system under icing and galloping conditions, precise location of weak links, simulation verification of optimization measures, and quantitative prediction of improvement effects, effectively improving the system's active defense capability and safety level.

[0048] The following, in conjunction with the accompanying drawings, provides a clearer and more complete description of the method and system for improving the reliability of a contact network system under icing and galloping conditions provided by the present invention:

[0049] Example 1

[0050] Figure 1 This embodiment provides a schematic flowchart of a method for improving the reliability of a catenary system under icing and galloping conditions. The method includes the following steps:

[0051] Taking a catenary anchor section in an ice-covered and dancing section as the analysis unit, a catenary system reliability calculation model is established based on the correlation between catenary and equipment and combined with the expert evaluation method. The ideal reliability of the catenary system under ideal design conditions is calculated based on the stress-strength interference theory and the catenary system reliability calculation model.

[0052] Collect contact network fault data after ice-covered galloping, obtain the failure rate of contact network equipment under ice-covered galloping conditions, and evaluate the actual reliability of the contact network system after ice-covered galloping.

[0053] By combining the icing thickness of the overhead contact line with wind speed and direction, a finite element simulation model of the overhead contact line icing galloping was established. The influence of span, wire tension, dropper spacing and structural height on the amplitude of overhead contact line galloping was analyzed, and an optimization scheme for the parameters of the overhead contact line system was obtained.

[0054] Based on the established finite element simulation model of the catenary icing and galloping, the effects of using bow-shaped positioners, adjusting joint electrical connections, and adding V-shaped suspension wires on the amplitude of catenary galloping are analyzed, and catenary structure adjustment schemes are obtained.

[0055] Based on the established finite element simulation model of the catenary icing and galloping, the influence of additional conductors using spacers, vibration dampers, and anti-galloping whips on the amplitude of the catenary galloping is analyzed, and the catenary equipment setting scheme is obtained.

[0056] Based on the obtained optimization schemes, structural adjustment schemes, and equipment setting schemes for the overhead contact system parameters, a technical solution for improving the reliability of the overhead contact system under icing and dancing conditions is formulated, and the reliability of the overhead contact system after adopting the improved technical solution is evaluated.

[0057] According to the method for improving the reliability of the overhead contact system under icing and galloping conditions provided in this embodiment, taking one overhead contact anchor segment in the icing and galloping section as the analysis unit, a reliability calculation model for the overhead contact system is established based on the correlation between the overhead contact system and equipment, combined with the expert evaluation method. Then, based on the stress-strength interference theory and the reliability calculation model of the overhead contact system, the ideal reliability of the overhead contact system under ideal design conditions is calculated, including the following steps:

[0058] The complexity, importance, working time, and environmental conditions of the i-th type of overhead contact line equipment were scored using an expert scoring method.

[0059] In this embodiment, an expert evaluation form is used to score the complexity, importance, working time, and environmental conditions of nine types of catenary equipment in an anchor section undergoing reliability improvement, including supports and foundations, positioning devices, elastic slings, electrical connections, additional conductors, anchoring devices, droppers, center anchors, and disconnectors. The number of devices is also counted.

[0060] Complexity: The complexity is assessed based on the number of devices and the ease of their assembly, with the simplest receiving 1 point and the most complex receiving 10 points.

[0061] Importance: The importance of the equipment is assessed based on its importance within the system, with the lowest importance receiving 1 point and the highest importance receiving 10 points.

[0062] Working time: The evaluation is based on the working time of the equipment. If the equipment is working continuously while the system is working, it will be rated 10 points. If the working time is the shortest, it will be rated 1 point.

[0063] Environmental conditions: The evaluation is based on the environment in which the equipment is located. The equipment will be subjected to extremely harsh and severe environmental conditions during operation. The best environment will be rated as 1 point.

[0064] Calculate the total expert evaluation score for the i-th type of overhead contact line equipment. , where n i C represents the number of type i contact wire devices within an anchor section. i For the complexity of the i-th type of overhead contact line equipment, I i For the importance of the i-th type of overhead contact line equipment, T i E represents the working time of the i-th type of overhead contact line equipment. i Environmental conditions for Class i contact network equipment;

[0065] Then the scoring coefficient of the i-th type of overhead contact line equipment for: ;

[0066] Constructing a reliability calculation model for the overhead contact system: reliability of the overhead contact system within an anchor section for: ; where f i The failure rate of the i-th type of overhead contact line equipment; The failure rate of the overhead contact system;

[0067] Theoretically, the generalized stress S of the i-th type of contact wire in an ideal state is... i With generalized strength The distribution type conforms to a normal distribution, that is... , ,in, Let be the average stress of the i-th type of equipment. Let be the average strength of the i-th type of equipment. Let be the standard deviation of stress for the i-th type of equipment. Let be the standard deviation of the strength of the i-th type of equipment;

[0068] The ideal reliability of the i-th type of overhead contact line equipment under ideal design conditions. It can be calculated using the formula: ,in, The random variable in the standard normal distribution does not exceed The cumulative probability;

[0069] Under ideal design conditions, the failure rate of the i-th type of overhead contact line equipment is 1-R. i ;

[0070] Based on the above-obtained reliability calculation model for the overhead contact system, the ideal reliability of the overhead contact system under ideal design conditions within an anchor section can be obtained. for: ;

[0071] According to the method for improving the reliability of the overhead contact system under icing and galloping conditions provided in this embodiment, the following steps are included: collecting overhead contact system fault data after icing and galloping, obtaining the failure rate of the overhead contact system equipment under icing and galloping conditions, and evaluating the actual reliability of the overhead contact system after icing and galloping.

[0072] For the line sections experiencing icing and galloping, data on wind speed, wind direction, ice thickness on the lines, and amplitude of the icing and galloping were collected. Fault data of the overhead contact line equipment caused by icing and galloping were statistically analyzed to obtain the actual fault rate (fa) of the i-th type of overhead contact line equipment caused by icing and galloping. i Specifically, sensors are installed along the railway line to measure wind speed, wind direction, ice thickness on the overhead contact line, and the amplitude of ice galloping. These sensors collect relevant external data in a timely manner, allowing analysis of whether ice galloping has occurred in the overhead contact line equipment and the severity of the galloping. After ice galloping occurs, the number of faulty equipment in the affected section can be counted through manual inspection or other monitoring methods. The actual failure rate (fa) of ice galloping for type i equipment is calculated by dividing the actual number of type i equipment in the affected section by the total number of type i equipment. i ;

[0073] Substitute the calculated actual failure rates of various overhead contact line equipment into the overhead contact line system reliability calculation model to calculate the actual icing amplitude Aa and icing frequency f. a Actual reliability of the overhead contact system after icing and galloping : .

[0074] Based on the method for improving the reliability of the overhead contact system under icing and galloping conditions provided in this embodiment, a finite element simulation model of the overhead contact system under icing and galloping conditions is established by combining the icing thickness of the overhead contact system with wind speed and direction. The influence of span, wire tension, dropper spacing, and structural height on the amplitude of overhead contact system galloping is analyzed, and an optimization scheme for the parameters of the overhead contact system is obtained, including the following steps:

[0075] Based on the icing thickness of the overhead contact line, wind speed, wind direction, and the structure of the overhead contact line system in the analysis section, a finite element simulation calculation model of the icing-induced galloping of the overhead contact line is built.

[0076] The effects of adjusting the overhead contact line span l, wire tension F, dropper spacing d, and structural height h on the amplitude of ice-covered overhead contact line galloping were analyzed.

[0077] Orthogonal experimental design was used to design schemes with different parameter combinations for adjustment, and the impact of different schemes on the amplitude of catenary ice-covered galloping was analyzed.

[0078] By comparing the effects of different adjustment schemes on reducing the amplitude of catenary icing and galloping, the most suitable system parameter optimization scheme can be obtained.

[0079] According to the method for improving the reliability of the overhead contact system under icing and galloping conditions provided in this embodiment, based on the established finite element simulation model of the overhead contact system under icing and galloping conditions, the influence of using bow-shaped positioners, adjusting joint electrical connections, and adding V-shaped suspension of conductors on the amplitude of overhead contact system galloping is analyzed, and an overhead contact system structure adjustment scheme is obtained, including the following steps:

[0080] The effects of single structural adjustments on the amplitude of ice-covered catenary dance were analyzed by using bow-shaped positioners, adjusting the joint electrical connection at the suspension point, and adding V-shaped suspension wires.

[0081] Orthogonal experimental design was used to design different structural combinations for adjustment, and the effects of different schemes on the amplitude of catenary ice-covered galloping were analyzed.

[0082] By comparing the effects of different adjustment schemes on reducing the amplitude of ice accretion and dancing of the overhead contact line, the most suitable structural adjustment scheme can be obtained.

[0083] According to the method for improving the reliability of the overhead contact system under icing and galloping conditions provided in this embodiment, based on the established finite element simulation calculation model of the overhead contact system under icing and galloping conditions, the influence of additional conductors using spacers, vibration dampers, and anti-galloping whips on the amplitude of overhead contact system galloping is analyzed, and an overhead contact system equipment setting scheme is obtained, including the following steps:

[0084] The effects of a single equipment setting on the amplitude of ice-covered catenary were analyzed by using additional conductor spacers, vibration dampers, and anti-galling whips respectively.

[0085] Orthogonal experimental design was used to design schemes with different equipment combinations, and the impact of different schemes on the amplitude of catenary ice accretion and galloping was analyzed.

[0086] By comparing the effects of different equipment configuration schemes on reducing the amplitude of contact wire icing and swaying, the most suitable equipment configuration scheme is selected.

[0087] According to the method for improving the reliability of the overhead contact system under icing and galloping conditions provided in this embodiment, based on the obtained overhead contact system parameter optimization scheme, structural adjustment scheme, and equipment setting scheme, a technical solution for improving the reliability of the overhead contact system under icing and galloping conditions is formed, and the reliability of the overhead contact system after adopting the improvement technical solution is evaluated, including the following steps:

[0088] Based on the optimization of overhead contact system parameters, structural adjustments, and equipment configuration schemes under icing and galloping conditions, a technical solution for improving the reliability of the overhead contact system is formed. The reliability improvement technical solution is simulated using a finite element simulation calculation model of the overhead contact system under icing and galloping conditions to obtain the amplitude and frequency of the overhead contact system under icing and galloping conditions.

[0089] Based on the obtained finite element simulation model of the overhead contact line icing and galloping, including the amplitude and frequency of the icing and galloping, the failure rate of the i-th type of overhead contact line equipment after adopting the improved technical solution is calculated according to the failure rate variation law. This yields the reliability of the overhead contact line system after icing and galloping following the adoption of the improved technical solution. ;

[0090] When calculating the failure rate of the i-th type of overhead contact line equipment after adopting the improved technical solution based on the failure rate variation pattern, the specific details are as follows:

[0091] The failure rate of the equipment under galloping amplitude A was calculated using the material fatigue SN curve and Miner's damage accumulation theory. :

[0092] ;

[0093] Where K1 is the proportionality coefficient between alternating stress and icing vibration amplitude on the overhead contact line, K2 is the proportionality coefficient between failure probability and damage rate of the overhead contact line, f is the icing vibration frequency, and C is a material constant.

[0094] Therefore, when the icing frequency of the i-th type of overhead contact line equipment is increased by f i1 Change to f i2 The amplitude is from A i1 Change to A i2 The failure rate changes according to the following pattern: ,in, , The frequencies of ice-covered dancing are f i1 f i2 Amplitude of the dance A i1 A i2 The corresponding equipment failure rate; for metal equipment, the m value is usually between 3 and 6, and the specific value needs to be determined through experiments or fitting historical data.

[0095] Compare the collected data on the i-th type of overhead contact line equipment at the icing galloping frequency f a With amplitude A a The failure rate is calculated based on the following: For the i-th type of overhead contact line equipment, after adopting the improved technical solution, at the icing and galloping frequency f... e With amplitude A e Failure rate : ;

[0096] Substitute the calculated failure rates of various overhead contact line devices after adopting the improved technical solutions into the overhead contact line system reliability calculation model, and calculate the icing and galloping amplitude A after adopting the improved technical solutions. e Reliability of the overhead contact system after icing and galloping :

[0097] .

[0098] After adopting the improved technical solution, the amplitude of icing dancing was obtained. e Reliability of the overhead contact system after icing and galloping Afterwards, Compared with the actual icing agitation amplitude A a Actual reliability of the overhead contact system after icing and galloping A comparison was made to observe whether the icing and galloping of the overhead contact system was suppressed after adopting the improved technical solution; additionally, by... Ideal reliability of the overhead contact system under ideal design conditions Comparisons are made, and data is compared to observe the effectiveness of improving technical solutions; specifically,

[0099] Determine the first difference If the value is greater than 0, it indicates that the improved technical solution has played a role in improving the reliability of the overhead contact system.

[0100] Calculate the second difference The smaller the specific value, the more effective the technical solution is.

[0101] Example 2

[0102] This invention also provides a system for improving the reliability of a catenary system under icing and galloping conditions, comprising:

[0103] The overhead contact system reliability calculation model construction module is used to establish an overhead contact system reliability calculation model for ice-covered and dancing sections of the overhead contact system based on the correlation between the overhead contact system and equipment, combined with the expert evaluation method.

[0104] The module for acquiring the actual reliability of the overhead contact system after icing and galloping is used to collect fault data of the overhead contact system after icing and galloping, obtain the failure rate of the overhead contact system equipment under icing and galloping conditions, and evaluate the actual reliability of the overhead contact system after icing and galloping. ;

[0105] The overhead contact system parameter optimization scheme acquisition module is used to combine the ice thickness of the overhead contact system with wind speed and wind direction to establish a finite element simulation calculation model of the ice-covered galloping of the overhead contact system, analyze the influence of span, wire tension, dropper spacing and structural height on the galloping amplitude of the overhead contact system, and obtain the overhead contact system parameter optimization scheme.

[0106] The overhead contact line structure adjustment scheme acquisition module is used to analyze the influence of using bow-shaped positioners, adjusting joint electrical connections, and adding V-shaped suspension of conductors on the amplitude of overhead contact line galloping based on the established finite element simulation calculation model of overhead contact line icing and galloping, and to obtain the overhead contact line structure adjustment scheme.

[0107] The overhead contact line equipment setup scheme acquisition module is used to analyze the impact of additional conductors using spacers, vibration dampers, and anti-galling whips on the amplitude of overhead contact line icing and galloping based on the established finite element simulation calculation model of overhead contact line icing and galloping, and to obtain the overhead contact line equipment setup scheme.

[0108] The overhead contact line reliability improvement effect evaluation module is used to formulate a technical solution for improving the reliability of the overhead contact line system under icing and galloping conditions based on the obtained optimization schemes, structural adjustment schemes, and equipment setting schemes of the overhead contact line system parameters, and to obtain the reliability of the overhead contact line system after icing and galloping using the reliability improvement technical solution. By and Ideal reliability of the overhead contact system A comparative analysis was conducted to evaluate the effectiveness of the improved contact network reliability after adopting the upgraded technical solution.

[0109] Furthermore, the present invention adopts the following technical solution:

[0110] A non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method for improving the reliability of a catenary system under icing and galloping conditions as described above.

[0111] Furthermore, the present invention adopts the following technical solution:

[0112] An electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the method for improving the reliability of the overhead contact system under icing and galloping conditions as described above.

[0113] From the above description of the embodiments, those skilled in the art will clearly understand that the facilities of the present invention can be implemented using software plus necessary general-purpose hardware platforms. Embodiments of the present invention can be implemented using existing processors, or by dedicated processors used for this or other purposes for suitable systems, or by hardwired systems. Embodiments of the present invention also include non-transitory computer-readable storage media, comprising machine-readable media for carrying or having machine-executable instructions or data structures stored thereon; such machine-readable media can be any available medium accessible by a general-purpose or special-purpose computer or other machine with a processor. For example, such machine-readable media can include RAM, ROM, EPROM, EEPROM, CD-ROM or other optical disc storage, disk storage or other magnetic storage devices, or any other medium that can be used to carry or store the required program code in the form of machine-executable instructions or data structures and is accessible by a general-purpose or special-purpose computer or other machine with a processor. When information is transmitted or provided to a machine via a network or other communication connection (hardwired, wireless, or a combination of hardwired and wireless), that connection is also considered a machine-readable medium.

[0114] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A method for improving the reliability of a catenary system under icing and galloping conditions, characterized in that, The method includes the following steps: For the overhead contact line in sections with icing and dancing, a reliability calculation model for the overhead contact line system is established based on the correlation between the overhead contact line and equipment, combined with the expert evaluation method. Collect overhead contact line fault data after ice-induced galloping, obtain the failure rate of overhead contact line equipment under ice-induced galloping conditions, and assess the actual reliability of the overhead contact line system after ice-induced galloping. ; By combining the icing thickness of the overhead contact line with wind speed and direction, a finite element simulation model of the overhead contact line icing galloping was established. The influence of span, wire tension, dropper spacing and structural height on the amplitude of overhead contact line galloping was analyzed, and an optimization scheme for the parameters of the overhead contact line system was obtained. Based on the established finite element simulation model of the catenary icing and galloping, the effects of using bow-shaped positioners, adjusting joint electrical connections, and adding V-shaped suspension wires on the amplitude of catenary galloping are analyzed, and catenary structure adjustment schemes are obtained. Based on the established finite element simulation model of the catenary icing and galloping, the influence of additional conductors using spacers, vibration dampers, and anti-galloping whips on the amplitude of the catenary galloping is analyzed, and the catenary equipment setting scheme is obtained. Based on the obtained parameter optimization scheme, structural adjustment scheme, and equipment setting scheme of the overhead contact system, a reliability improvement technical scheme for the overhead contact system under icing and galloping conditions is formulated, and the reliability of the overhead contact system after icing and galloping using the reliability improvement technical scheme is obtained. By and Ideal reliability of the overhead contact system A comparative analysis was conducted to evaluate the effectiveness of the improved contact network reliability after adopting the upgraded technical solution.

2. The method for improving the reliability of a contact network system under icing and galloping conditions according to claim 1, characterized in that, By and Ideal reliability of the overhead contact system The method for comparative analysis and evaluation of the effectiveness of the improved contact network reliability after adopting the upgraded technical solution is as follows: Determine the first difference If the value is greater than 0, it indicates that the improved technical solution has played a role in improving the reliability of the overhead contact system. Calculate the second difference The smaller the specific value, the more effective the technical solution is.

3. The method for improving the reliability of a contact network system under icing and galloping conditions according to claim 1, characterized in that, For the overhead contact line in sections experiencing icing and galloping, the following method is used to establish a reliability calculation model for the overhead contact line system based on the correlation between the overhead contact line and equipment, combined with expert evaluation: The expert evaluation method was used to score the complexity, importance, working time and environmental conditions of nine types of catenary equipment in the ice-covered and dancing sections of the catenary anchorage. These included supports and foundations, positioning devices, elastic suspenders, electrical connections, additional conductors, anchoring devices, droppers, central anchors and disconnecting switches. Calculate the total expert evaluation score for the i-th type of overhead contact line equipment. , where n i C represents the number of type i contact wire devices within an anchor section. i For the complexity of the i-th type of overhead contact line equipment, I i For the importance of the i-th type of overhead contact line equipment, T i E represents the working time of the i-th type of overhead contact line equipment. i Environmental conditions for Class i contact network equipment; Then the scoring coefficient of the i-th type of overhead contact line equipment for: ; Constructing a reliability calculation model for the overhead contact system: reliability of the overhead contact system within an anchor section for: ; where f i The failure rate of the i-th type of overhead contact line equipment; The failure rate of the overhead contact system.

4. The method for improving the reliability of a contact network system under icing and galloping conditions according to claim 3, characterized in that, Obtain the reliability of the overhead contact system after icing and galloping using reliability enhancement technologies. The method is as follows: Compare the collected data on the i-th type of overhead contact line equipment at the icing galloping frequency f a With amplitude A a The failure rate is calculated based on the following: For the i-th type of overhead contact line equipment, after adopting the improved technical solution, at the icing and galloping frequency f... e With amplitude A e Failure rate : ; Substitute the calculated failure rates of various overhead contact line devices after adopting the improved technical solutions into the overhead contact line system reliability calculation model to calculate the reliability of the overhead contact line system after icing and galloping following the adoption of the improved technical solutions. : 。 5. The method for improving the reliability of a contact network system under icing and galloping conditions according to claim 3, characterized in that, Collect overhead contact line fault data after ice-induced galloping, obtain the failure rate of overhead contact line equipment under ice-induced galloping conditions, and assess the actual reliability of the overhead contact line system after ice-induced galloping. The method is as follows: If the number of faulty devices in the ice-induced galloping zone is statistically analyzed, then the actual failure rate fa of the i-th type of equipment due to ice-induced galloping is obtained. i The actual number of faults caused by icing and dancing of equipment of type i is divided by the total number of equipment of type i in the icing and dancing section. The actual failure rate fa obtained i Substituting into the overhead contact system reliability calculation model, calculate the actual reliability of the overhead contact system after icing and galloping under the actual icing amplitude Aa. : .

6. The method for improving the reliability of a contact network system under icing and galloping conditions according to claim 3, characterized in that, Ideal reliability of overhead contact system The method for obtaining it is as follows: The generalized stress S of the i-th type of contact wire in an ideal state i With generalized strength The distribution type conforms to a normal distribution: , ,in, Let be the average stress of the i-th type of equipment. Let be the average strength of the i-th type of equipment. Let be the standard deviation of stress for the i-th type of equipment. Let be the standard deviation of the strength of the i-th type of equipment; The ideal reliability of the i-th type of overhead contact line equipment under ideal design conditions. It can be calculated using the formula: ,in, The random variable in the standard normal distribution does not exceed The cumulative probability; Under ideal design conditions, the failure rate of the i-th type of overhead contact line equipment is 1-R. i ; Based on the obtained contact network system reliability calculation model, the ideal reliability of the contact network system under ideal design conditions within an anchor section is obtained. for: .

7. A system for improving the reliability of a catenary system under icing and galloping conditions, characterized in that: include: The overhead contact system reliability calculation model construction module is used to establish an overhead contact system reliability calculation model for ice-covered and dancing sections of the overhead contact system based on the correlation between the overhead contact system and equipment, combined with the expert evaluation method. The module for acquiring the actual reliability of the overhead contact system after icing and galloping is used to collect fault data of the overhead contact system after icing and galloping, obtain the failure rate of the overhead contact system equipment under icing and galloping conditions, and evaluate the actual reliability of the overhead contact system after icing and galloping. ; The overhead contact system parameter optimization scheme acquisition module is used to combine the ice thickness of the overhead contact system with wind speed and wind direction to establish a finite element simulation calculation model of the ice-covered galloping of the overhead contact system, analyze the influence of span, wire tension, dropper spacing and structural height on the galloping amplitude of the overhead contact system, and obtain the overhead contact system parameter optimization scheme. The overhead contact line structure adjustment scheme acquisition module is used to analyze the influence of using bow-shaped positioners, adjusting joint electrical connections, and adding V-shaped suspension of conductors on the amplitude of overhead contact line galloping based on the established finite element simulation calculation model of overhead contact line icing and galloping, and to obtain the overhead contact line structure adjustment scheme. The overhead contact line equipment setup scheme acquisition module is used to analyze the impact of additional conductors using spacers, vibration dampers, and anti-galling whips on the amplitude of overhead contact line icing and galloping based on the established finite element simulation calculation model of overhead contact line icing and galloping, and to obtain the overhead contact line equipment setup scheme. The overhead contact line reliability improvement effect evaluation module is used to formulate a technical solution for improving the reliability of the overhead contact line system under icing and galloping conditions based on the obtained optimization schemes, structural adjustment schemes, and equipment setting schemes of the overhead contact line system parameters, and to obtain the reliability of the overhead contact line system after icing and galloping using the reliability improvement technical solution. By and Ideal reliability of the overhead contact system A comparative analysis was conducted to evaluate the effectiveness of the improved contact network reliability after adopting the upgraded technical solution.

8. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the method for improving the reliability of a catenary system under icing and dancing conditions as described in any one of claims 1 to 6.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the method for improving the reliability of the overhead contact system under icing and dancing conditions as described in any one of claims 1 to 6.

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