交流输电线路绝缘子破坏后的结构非线性有限元分析  

Nonlinear finite element analysis of AC transmission lines based on insulator rupture

作　　者：夏开全[1] 刘云[2] 钱振东[2] 

机构地区：[1]中国电力科学研究院,北京100055 [2]东南大学智能运输系统研究中心,南京210096

出　　处：《东南大学学报（自然科学版）》2009年第3期514-518,共5页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金资助项目(50578038);国家电网公司科技资助项目(SGKJ[2007]116)

摘　　要：为了探讨绝缘子破坏失效对交流塔输电线路结构的受力影响,研究了适用于分析构件失效后输电线路结构动响应的宏观建模方法,包括输电塔建模、输电导线建模和绝缘子建模;采用瞬态动力分析方法计算了高压交流输电线路耐张段一基塔在发生上横担一组绝缘子突然断裂破坏后,邻近破坏处的导线、绝缘子、塔构件的动态张力.分析结果表明,上横担一组绝缘子破坏失效后,破坏档未破坏端导线的张力超过了技术规程中的设计值;导线的跌落对破坏档未破坏端的上横担绝缘子受力有较大的影响,而对上横担杆件没有明显的影响.In order to study the dynamic response of high voltage transmission lines with drum type towers under mechanical faults of insulators, the non-linear dynamic finite element model of AC （ alternating current） high voltage transmission line system, including transmission tower, transmission line and insulator, was established. The transient dynamic analysis method is proposed to analyze the variation law of dynamic response under insulator rupture, and the dynamic response of structural elements next to the broken span is calculated. The results show that the peak tension in the conductor of the upper crossarm at the suspension point exceeds the design value. Insulator rupture has no effect on the tower components of the upper crossarm, but it has a significant influence on the insulator tension of the upper crossarm.

关 键 词：交流输电线路 鼓型塔 瞬态响应 有限单元法 绝缘子断裂 

分 类 号：TM753[电气工程—电力系统及自动化]