计及微振磨损与风雨荷载的输电线可靠性建模

发布时间：2017-12-27 04:11

本文关键词：计及微振磨损与风雨荷载的输电线可靠性建模　出处：《电力系统保护与控制》2015年02期 　论文类型：期刊论文

【摘要】：输电线长期受风导致的振动引起股线间微振磨损,而外部强风雨荷载的冲击进一步加剧了磨损程度,导致断股、断线事故风险显著增加,因此对经受长期微振磨损的输电线在强风雨荷载冲击下的可靠性模型进行研究具有重要实用价值。基于微振磨损的理论模型建立了ACSR的结构强度时变模型,在考虑微振磨损的基础上计入强风雨荷载的影响,结合输电线强度和永久荷载的随机特性,建立输电线时间相依可靠性模型。所提时间相依故障概率模型可以对输电线断股、断线风险进行准确预测并实现恶劣天气下的输电线风险预警。算例结果表明,微振磨损会显著降低输电线的结构可靠性,而强风雨条件下的雨荷载则进一步加剧了事故风险。
[Abstract]:Between the strands fretting caused by long-term vibration of transmission lines caused by wind, strong wind and rain and the external impact of further exacerbated the degree of wear, resulting in broken and broken accident risk increased significantly, so it has important practical value for research on the reliability model of transmission lines subjected to long-term fretting wear in the strong wind and rain under the impact. Based on the theoretical model of micro vibration wear, a time-dependent model of ACSR structure strength is established. Considering the influence of strong wind and rain load on the basis of considering micro vibration wear, combined with the random characteristics of transmission line strength and permanent load, a time dependent reliability model of transmission line is established. The proposed time dependent fault probability model can accurately predict the risk of the broken and broken lines of the transmission lines and realize the early warning of the risk of transmission lines in bad weather. The results show that the structural reliability of the transmission lines can be significantly reduced by the micro vibration wear, while the rain load under the strong wind and rain conditions further aggravates the risk of the accident.
【作者单位】：输配电装备及系统安全与新技术国家重点实验室(重庆大学);温州供电公司;云南电网公司生产设备管理部;
【基金】：国家自然科学基金(50977094) 重庆市自然科学基金(CSTC,2011BB6047) 输配电装备及系统安全与新技术国家重点实验室自主研究项目(2007DA10512711208) 中央高校基本科研业务费科研专项资助(CDJZR11150012)~~
【分类号】：TM75
【正文快照】： This work is supported by National Natural Science Foundation of China(No.50977094),Natural Science Foundation ofChongqing(No.2011BB6047),State Key Laboratory of Power Transmission EquipmentSystem Security and New Technology(No.2007DA10512711208),and th

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