弹簧疲劳对高压SF6断路器机械特性的影响研究  

Study on Effect of Spring Fatigue on Mechanical Characteristics of High Voltage SF6 Circuit Breaker

作　　者：辛伟峰 王栋 秦浩 张国钢[2] 刘亚魁 马德英 张卓 闫庆方 XIN Weifeng;WANG Dong;QIN Hao;ZHANG Guogang;LIU Yakui;MA Deying;ZHANG Zhuo;YAN Qingfang(State Grid Henan Electric Power Company Electric Power Research Institute,Zhengzhou 450052,China;State Key Laboratory of Electrical Insulation of Power Equipment,Xi'an Jiaotong University,Xi'an 710049,China;State Grid Henan Electric Power Company,Zhengzhou 450000,China;State Grid Henan Electric Power Company Zhengzhou Electric Power Supply Company,Zhengzhou 450000,China)

机构地区：[1]国网河南省电力公司电力科学研究院,郑州450052 [2]西安交通大学电力设备电气绝缘国家重点实验室,西安710049 [3]国网河南省电力公司,郑州450000 [4]国网河南省电力公司郑州供电公司,郑州450000

出　　处：《高压电器》2021年第1期20-25,共6页High Voltage Apparatus

基　　金：国家电网有限公司总部科技项目资助(主动预警关键技术研究及应用)。

摘　　要：机械特性对高压断路器的开断性能具有重要的意义。文中以配弹簧操动机构的126 kV高压SF6断路器为研究对象,实验测量了分合闸弹簧的疲劳曲线,在分析弹簧疲劳机理的基础上,基于弹簧应力松弛过程的理论模型建立了预测弹簧疲劳的线性回归方程;建立高压断路器弹簧机构多体动力学模型,根据高压断路器实际工况进行动力学仿真,从而对高压断路器的机械特性进行计算分析;在此基础上分析了高压断路器投入使用不同年限情况下的分合闸行程、速度随时间的变化特性,揭示了高压断路器在不同疲劳情况下的特性劣化变化规律,实现了高压断路器全寿命周期的机械状态预测。The mechanical characteristics are of great significance for the interruption performance of high voltage circuit breaker.In this paper,the 126 kV high-voltage SF6 circuit breaker with spring operating mechanism is taken as the study object.The fatigue curve of the opening and closing spring is measured by the experiment and,on the basis of analyzing the fatigue mechanism of the spring and the theory model of the relaxation process of spring stress,the linear regression equation for predicting spring fatigue is set up.The multi-body dynamics model of the spring operating mechanism of high-voltage circuit breaker is set up and the dynamic simulation is carried out in accordance with actual operation condition of the circuit breaker so that the mechanical characteristic of circuit breaker is calculated and analyzed.On this basis,the variation characteristic of the opening/closing stroke and speed with time at different years of operation are analyzed,the performance degradation law of circuit breaker with different fatigue conditions is revealed and mechanical state predication of high-voltage circuit breaker within the whole life cycle is achieved.

关 键 词：高压断路器 弹簧操动机构 弹簧疲劳 寿命预测 

分 类 号：TM561.3[电气工程—电器]