基于最优合闸速度设计126kV真空断路器操动机构凸轮轮廓  

Optimization Design of Operating Mechanism Cam Profile for a 126 kV Vacuum Circuit Breaker Based on an Optimal Closing Velocity

作　　者：李永林 余砾[2] 李旭旭 李倩[2] 韩桂全 刘佩[2] 王铭飞 张博健[2] 闫静[2] 刘志远[2] LI Yonglin YU Li LI Xuxu LI Qian HAN Guiquan LIU Pei WANG Mingfei ZHANG Bojian YAN Jing LIU Zhiyuan(Pinggao Group Co., Ltd., Henan Pingdingshan 467001, China State Key Laboratory of Electrical Insulation and Power Equipment, Xi＇an Jiaotong University, Xi＇an 710049, China)

机构地区：[1]平高集团有限公司,河南平顶山467001 [2]西安交通大学电气工程学院电力设备与电气绝缘国家重点实验室,西安710049

出　　处：《高压电器》2017年第3期197-204,共8页High Voltage Apparatus

摘　　要：文中以合闸过程中燃弧时间最短为目标,提出了设计高电压等级真空断路器凸轮轮廓的方法。首先,通过实验确定合闸速度特性。得到126 kV真空断路器合闸燃弧时间与预击穿速度的数学关系,表明在预击穿速度为1.15 m/s时,126 kV真空断路器的合闸燃弧时间最短;其次,由上述方法得到真空断路器合闸行程曲线确定凸轮轮廓线。根据合闸行程曲线上每个点确定弹簧操动机构主轴转角,并根据合闸弹簧所需要的能量确定机构储能轴转角,然后由主轴转角与储能轴转角的比值确定凸轮的轮廓曲线。最后,根据上述凸轮轮廓设计方法编制了凸轮设计软件,利用该软件设计的凸轮在ADAMS仿真软件中对整机进行仿真计算,仿真结果得到预击穿速度为1.18 m/s,表明此设计能很好的满足设计要求。The objective of this paper is to propose a design method to optimize the closing cam of a high-voltage vacuum circuit breaker approaching the minimum arcing time. First, the optimum closing speed characteristics are determined through experiments. The function of the prestrike closing velocity and the total arcing duration is obtained, which indicates that the closing time of a 126 kV vacuum circuit breaker is the minimum when the pre-breakdown speed is 1.15 m/s. Next, the cam profile is determined by the closing curve obtained. According to the closing curve of the vacuum circuit breaker, one can determine the rotation angle of the spring operating mechanism main shaft corresponding to each point on the curve. The energy storage shaft rotation angle is determined according to the energy required for the closing spring. Then, the cam profile is determined according to the ratio of the main shaft rotation angle and energy storage shaft rotation angle. Finally, a cam design software is developed according to the cam profile design method. The simulation results by ADAMS simulation software show that the pre-breakdown speed is 1.18 m/s, which indicates that the design perfectly satisfy the demands.

关 键 词：126KV真空断路器 合闸特性 凸轮轮廓 软件设计 

分 类 号：TM561.2[电气工程—电器]