500 kV耐张型悬索支撑输电体系动力整体可靠性分析  

Dynamic Global Reliability Assessment of 500 kV Tension Suspension-braced Transmission System

作　　者：王邦杰 王涛 李茂华 李正良[1] 吕大刚[4] 谭忆秋[2] WANG Bangjie;WANG Tao;LI Maohua;LI Zhengliang;LYU Dagang;TAN Yiqiu(School of Civil Engineering,Chongqing University,Shapingba District,Chongqing 400045,China;School of Transportation Science and Engineering,Harbin Institute of Technology,Harbin 150090,Heilongjiang Province,China;China Electric Power Research Institute,Xicheng District,Beijing 100055,China;School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,Heilongjiang Province,China)

机构地区：[1]重庆大学土木工程学院,重庆市沙坪坝区400045 [2]哈尔滨工业大学交通科学与工程学院,黑龙江省哈尔滨市150090 [3]中国电力科学研究院有限公司,北京市西城区100055 [4]哈尔滨工业大学土木工程学院,黑龙江省哈尔滨市150090

出　　处：《中国电机工程学报》2025年第6期2437-2446,I0034,共11页PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING

基　　金：国家电网有限公司科技项目(5200-202156071A-0-0-00);重庆市自然科学基金项目(CSTB2024NSCQ-MSX1134);重庆市自然科学基金创新发展联合基金项目(CSTB2023NSCQ-LZX0080)。

摘　　要：作为适用于山区地形的新型输电体系,500 kV耐张型悬索支撑输电体系为典型的风敏感结构且可能存在多个失效模式,开展其在随机风荷载作用下的动力整体可靠度研究以评估该耦联系统安全性尤为重要。为此,该文建立耐张型悬索支撑输电体系动力整体可靠性分析框架。首先,发展该新型输电体系在随机风荷载作用下的非线性有限元模型;然后,考察耐张型悬索支撑输电体系存在的各类张力失效模式;进而,基于状态变量描述法建立耐张型悬索支撑输电体系整体失效模式的单一等价功能函数;最后,通过广义概率密度演化理论开展耐张型悬索支撑输电体系动力整体可靠性分析。结果表明:输电导线和支撑导线悬索的归一化张力极值概率密度函数均为非规则曲线,且分别呈现出右偏分布和左偏分布趋势;输电导线和支撑导线悬索的张力极值分别主要集中在60~90 kN和300~400 kN区间,其对应的动力可靠度分别为0.9657和1;耐张型悬索支撑输电体系动力整体可靠度与输电导线张力失效模式下的动力可靠度一致,其将随着结构阻尼的减小而降低。结果可为耐张型悬索支撑输电体系抗风整体可靠性设计及工程实践提供一定参考。As a new type of transmission structure suitable for hilly terrain,the 500 kV tension suspension-braced transmission system is a typical wind sensitive structure and may have multiple failure modes.Therefore,it is particularly important to analyze its dynamic global reliability under the stochastic wind load to evaluate the safety of the coupled system.In this regard,a framework is established for the dynamic global reliability analysis of the tension suspension-braced transmission system.First,a nonlinear finite element model considering the stochastic wind load effect is developed for the new transmission system.Then,various tension failure modes of the tension suspension-braced transmission system are investigated,and the equivalent performance function for the global failure mode of the tension type suspension support transmission system is described uniformly by the state variable description method.Finally,the dynamic global reliability of the tension suspension-braced transmission system is analyzed by using the probability density evolution method.The example results show that:1)The probability density functions of the maximum normalized tension of the conductor and the supporting-conductor suspension cable are both irregular curves,showing trends of right-skewed distribution and left-skewed distribution,respectively.2)The maximum tension for the conductor and the supporting-conductor suspension cable are mainly concentrated in the range of 60~90 kN and 300~400 kN,respectively,with corresponding dynamic reliability values of 0.9657 and 1.3)The global dynamic reliability of the tension suspension-braced transmission structure is consistent with the dynamic reliability of the conductor in the tension failure mode,which would decrease with the decrease of structural damping.These findings can provide useful references for the globe reliability design of wind-resistance and engineering practice of the tension suspension-braced transmission system.

关 键 词：悬索支撑输电体系 多失效模式 随机风荷载 概率密度演化方法 动力整体可靠度 

分 类 号：TU351[建筑科学—结构工程]