CN-122020933-A - Method and system for improving reliability of contact net system under icing galloping condition

CN122020933ACN 122020933 ACN122020933 ACN 122020933ACN-122020933-A

Abstract

The invention discloses a method and a system for improving reliability of a contact network system under icing galloping conditions, wherein the method comprises the steps of establishing a contact network system reliability calculation model by combining an expert evaluation method, evaluating actual reliability of the contact network system after icing galloping, analyzing influence of span, thread tension, hanger spacing and structure height on the contact network galloping amplitude to obtain a contact network system parameter optimization scheme, analyzing influence of an arc-shaped positioner, adjustment joint electric connection and an additional wire V-shaped suspension on the contact network galloping amplitude to obtain a contact network structure adjustment scheme, analyzing influence of the additional wire on the contact network galloping amplitude by using a spacer, a vibration damper and a galloping whip, obtaining a contact network equipment setting scheme, forming a contact network system reliability improvement technical scheme under icing galloping, evaluating a contact network reliability improvement effect after adopting a lifting technical scheme, and improving active defense capacity and safety level of the contact network system.

Inventors

HE CHANGHONG
LI ZHENG
CAI PENGFEI
QI WENJIE
WANG JIANDONG
LIU JIDONG
LUO JIAN
DENG HONG
GU XIAODONG
CUI YANLONG
LI YEQIANG
WEI BO
WU MENGZHEN

Assignees

中国铁路设计集团有限公司
西南交通大学

Dates

Publication Date: 20260512
Application Date: 20260413

Claims (9)

1. The method for improving the reliability of the contact net system under the icing galloping condition is characterized by comprising the following steps of: aiming at the ice-coating galloping section overhead line system, a reliability calculation model of the overhead line system is established based on the overhead line system-equipment correlation relationship and combined with an expert evaluation method; Collecting contact net fault data of a line after icing and galloping, acquiring fault rate of contact net equipment under the condition of icing and galloping, and evaluating actual reliability of a contact net system after icing and galloping ; Establishing a finite element simulation calculation model of the icing galloping of the overhead line system by combining the icing thickness of the overhead line system, the wind speed and the wind direction, analyzing the influence of the span, the thread tension, the hanger spacing and the structural height on the galloping amplitude of the overhead line system, and obtaining an overhead line system parameter optimization scheme; based on the established finite element simulation calculation model of the icing galloping of the overhead line system, analyzing the influence of the V-shaped suspension of the additional lead on the galloping amplitude of the overhead line system by adopting an arc-shaped positioner, adjusting joint electric connection and the additional lead to obtain an overhead line system structure adjusting scheme; based on the established finite element simulation calculation model of the icing galloping of the overhead line system, analyzing the influence of the additional lead on the galloping amplitude of the overhead line system by adopting a spacer, a vibration damper and a galloping-proof whip, and obtaining a setting scheme of overhead line system equipment; based on the obtained overhead line system parameter optimization scheme, structure adjustment scheme and equipment setting scheme, a overhead line system reliability improvement technical scheme under the icing galloping condition is formed, and the reliability of the overhead line system after icing galloping by adopting the reliability improvement technical scheme is obtained By combining And (3) with Ideal reliability of contact net system And (3) performing comparative analysis, and evaluating the reliability lifting effect of the overhead line system after the lifting technical scheme is adopted.
2. The method for improving the reliability of a contact network system under icing galloping conditions according to claim 1, wherein the step of improving the reliability of the contact network system under icing galloping conditions is performed by And (3) with Ideal reliability of contact net system The method for carrying out contrast analysis and evaluating the reliability improving effect of the overhead contact system by adopting the improving technical scheme comprises the following steps: Judging the first difference If the contact network reliability is greater than 0, the fact that the contact network reliability is greater than zero indicates that the lifting technical scheme plays a role in lifting the contact network system reliability; Calculating a second difference The smaller the number, the more effective the lifting technique is.
3. The method for improving the reliability of a catenary system under the icing galloping condition according to claim 1, wherein the method for establishing a catenary system reliability calculation model based on a catenary-equipment correlation relationship and combining an expert evaluation method aiming at the icing galloping section catenary is as follows: grading the complexity, importance, working time and environmental conditions of 9 types of contact net equipment including a strut and a foundation in an anchor section of the contact net of the ice coating galloping section, a positioning device, an elastic sling, electric connection, an additional wire, a lower anchor device, a hanger wire, a central anchor and a disconnecting switch by adopting an expert evaluation method; calculating the expert evaluation total score of the i-th contact network equipment Wherein n i is the number of the ith type of contact net equipment in one anchor section, C i is the complexity of the ith type of contact net equipment, I i is the importance of the ith type of contact net equipment, T i is the working time of the ith type of contact net equipment, and E i is the environmental condition of the ith type of contact net equipment; scoring coefficient of i-th contact net equipment The method comprises the following steps: ; constructing a reliability calculation model of the contact net system, namely the reliability of the contact net system in one anchor section The method comprises the following steps: wherein f i is the failure rate of the i-th type contact net equipment; The failure rate of the contact net system is obtained.
4. The method for improving reliability of catenary system under icing galloping conditions according to claim 3, wherein the reliability of the catenary system after icing galloping is obtained by adopting a reliability improving technical scheme The method of (1) is as follows: Comparing the collected fault rate of the ith contact net equipment under the icing galloping frequency f a and the amplitude A a , and calculating the fault rate of the ith contact net equipment under the icing galloping frequency f e and the amplitude A e after adopting the lifting technical scheme : ; Substituting the calculated failure rate of various contact network equipment after adopting the lifting technical scheme into a contact network system reliability calculation model, and calculating the reliability of the contact network system after icing and waving after adopting the lifting technical scheme : 。
5. The method for improving reliability of catenary system under icing galloping conditions according to claim 3, wherein the method is characterized by collecting catenary fault data of the line after icing galloping, acquiring fault rate of catenary equipment under icing galloping conditions, and evaluating actual reliability of catenary system after icing galloping The method of (1) is as follows: Counting the number of fault devices in the icing galloping occurrence zone, wherein the actual fault rate fa i of the icing galloping of the i-th type device is the actual fault number of the icing galloping of the i-th type device divided by the total number of the i-th type devices in the icing galloping zone; substituting the obtained actual fault rate fa i into a reliability calculation model of the catenary system to calculate the actual reliability of the catenary system after icing and waving under the actual icing and waving amplitude Aa : 。
6. The method for improving reliability of contact network system under icing galloping condition according to claim 3, wherein the contact network system has ideal reliability The acquisition method of (1) comprises the following steps: ideal state contact net i-th equipment generalized stress S i and generalized strength The distribution type of (2) conforms to the normal distribution: 、 , wherein, Is the stress average value of the i-th type equipment, As the mean value of the intensity of the i-th class of devices, Is the standard deviation of the stress of the i-th type equipment, Is the standard deviation of the intensity of the i-th equipment; ideal reliability of the i-th contact net equipment under ideal design conditions The calculation can be made by the formula: , wherein, Representing no more than a random variable in a normal distribution Is a cumulative probability of (1); The failure rate of the i-th contact net equipment under ideal design conditions is 1-R i ; Based on the obtained reliability calculation model of the contact net system, the ideal reliability of the contact net system under ideal design conditions in one anchor section is obtained The method comprises the following steps: 。
7. contact net system reliability promotion system under icing galloping condition, its characterized in that includes: The overhead line system reliability calculation model building module is used for building an overhead line system reliability calculation model aiming at the overhead line of the icing galloping section based on the overhead line-equipment correlation relationship and combining an expert evaluation method; the practical reliability acquisition module of the overhead line system after the icing galloping is used for collecting overhead line fault data of the line after the icing galloping, acquiring the fault rate of overhead line equipment under the condition of the icing galloping, and evaluating the practical reliability of the overhead line system after the icing galloping ; The overhead line system parameter optimization scheme acquisition module is used for establishing an overhead line system icing galloping finite element simulation calculation model by combining the line overhead line icing thickness with the wind speed and the wind direction, analyzing the influence of span, wire tension, hanger spacing and structural height on the galloping amplitude of the overhead line system, and acquiring an overhead line system parameter optimization scheme; The overhead line system structure adjustment scheme acquisition module is used for analyzing the influence of the adoption of an arc-shaped positioner, the adjustment joint electric connection and the V-shaped suspension of the additional lead on the swing amplitude of the overhead line system based on the established overhead line system icing swing finite element simulation calculation model to obtain an overhead line system structure adjustment scheme; the overhead line system equipment setting scheme obtaining module is used for obtaining an overhead line system equipment setting scheme based on an established overhead line system icing galloping finite element simulation calculation model by analyzing the influence of an additional wire on the galloping amplitude of the overhead line system by using a spacer, a vibration damper and a galloping whip; The overhead line system reliability lifting effect evaluation module is used for forming an overhead line system reliability lifting technical scheme under icing galloping conditions based on the obtained overhead line system parameter optimization scheme, the structure adjustment scheme and the equipment setting scheme, and obtaining the reliability of the overhead line system after icing galloping by adopting the reliability lifting technical scheme By combining And (3) with Ideal reliability of contact net system And (3) performing comparative analysis, and evaluating the reliability lifting effect of the overhead line system after the lifting technical scheme is adopted.
8. A non-transitory computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor implements a method for improving reliability of a catenary system under icing galloping conditions according to any one of claims 1 to 6.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements a method for improving reliability of a catenary system under icing galloping conditions according to any one of claims 1 to 6 when the program is executed by the processor.

Description

Method and system for improving reliability of contact net system under icing galloping condition Technical Field The invention belongs to the technical field of state evaluation, and particularly relates to a method and a system for improving reliability of a contact network system under icing galloping conditions. Background The overhead contact system is a core power supply facility of the electrified railway, low-frequency large-amplitude vibration caused by icing galloping is easy to cause faults such as fatigue damage, wire breakage and the like of overhead contact system equipment, even causes power interruption and driving accidents, and is a main potential safety hazard for railway operation in winter in cold areas and freezing rain multiple areas. The existing protective measures are mainly concentrated on local device improvement or empirical reinforcement, and have obvious limitations, namely the existing protective measures lack of an overall quantitative evaluation model based on a system reliability theory, the comprehensive reflection of the equipment state and the system relevance is difficult, the utilization of fault data after galloping is insufficient, the analysis of fault rules is not deep, the preventive optimization is lack of basis, the parameter adjustment and the structure improvement are independent of experience, the refined simulation verification based on a galloping mechanism is lacked, the galloping inhibition effect of different measures cannot be accurately predicted, and the actual improvement effect of the system reliability is difficult to quantitatively evaluate after the implementation of the improvement scheme. Therefore, a systematic, modeled and data-driven method is needed to realize the transition from passive response to active prevention, local repair to overall optimization, and improve the operation reliability of the overhead line system under the condition of icing galloping. Disclosure of Invention In order to solve the problems in the background art, the invention aims to provide a method for improving the reliability of a contact net system under the condition of icing galloping, which comprises the following steps: aiming at the ice-coating galloping section overhead line system, a reliability calculation model of the overhead line system is established based on the overhead line system-equipment correlation relationship and combined with an expert evaluation method; Collecting contact net fault data of a line after icing and galloping, acquiring fault rate of contact net equipment under the condition of icing and galloping, and evaluating actual reliability of a contact net system after icing and galloping ; Establishing a finite element simulation calculation model of the icing galloping of the overhead line system by combining the icing thickness of the overhead line system, the wind speed and the wind direction, analyzing the influence of the span, the thread tension, the hanger spacing and the structural height on the galloping amplitude of the overhead line system, and obtaining an overhead line system parameter optimization scheme; based on the established finite element simulation calculation model of the icing galloping of the overhead line system, analyzing the influence of the V-shaped suspension of the additional lead on the galloping amplitude of the overhead line system by adopting an arc-shaped positioner, adjusting joint electric connection and the additional lead to obtain an overhead line system structure adjusting scheme; based on the established finite element simulation calculation model of the icing galloping of the overhead line system, analyzing the influence of the additional lead on the galloping amplitude of the overhead line system by adopting a spacer, a vibration damper and a galloping-proof whip, and obtaining a setting scheme of overhead line system equipment; based on the obtained overhead line system parameter optimization scheme, structure adjustment scheme and equipment setting scheme, a overhead line system reliability improvement technical scheme under the icing galloping condition is formed, and the reliability of the overhead line system after icing galloping by adopting the reliability improvement technical scheme is obtained By combiningAnd (3) withIdeal reliability of contact net systemAnd (3) performing comparative analysis, and evaluating the reliability lifting effect of the overhead line system after the lifting technical scheme is adopted. Further, by combiningAnd (3) withIdeal reliability of contact net systemThe method for carrying out contrast analysis and evaluating the reliability improving effect of the overhead contact system by adopting the improving technical scheme comprises the following steps: Judging the first difference If the contact network reliability is greater than 0, the fact that the contact network reliability is greater than zero indicates that the lifting technical scheme plays a r