真空旁路开关灭弧室绝缘仿真及不确定性分析
Insulation Simulation and Uncertainty Analysis of Vacuum Interrupter for Bypass Switch
刘晓明 1李国铮 1陈海 1史红菲 1李培源 1陈军平2
作者信息
- 1. 省部共建电工装备可靠性与智能化国家重点实验室河北工业大学电气工程学院 天津 300401
- 2. 成都旭光电子股份有限公司 成都 610500
- 折叠
摘要
真空旁路开关在直流系统中作为重要的保护器件长期工作在分闸状态下.针对真空旁路开关绝缘可靠性问题,文章以 3.6 kV/2500 A真空旁路开关灭弧室为研究对象,采用有限元分析手段,建立三维电场物理数学模型,分析其在标准雷电冲击耐受峰值电压作用下的电场分布情况;并引入表面电场宏观增强因子,对电场集中区域的场域分布均匀程度进行定量分析.此外,采用混沌多项式展开法,对灭弧室触头电极中心开槽圆角半径进行不确定性分析,以确保其绝缘性能和加工制备的可靠性.
Abstract
As an important protection device in the DC power system,the bypass switch usually works under open circuit conditions.In order to analyze the insulation reliability of the vacuum bypass switch,a three-dimensional physical mathematical model of the electric field is established by using the finite element method to illustrate the distribution of the electric field under standard lightning impulse to withstand peak voltage.The macroscopic enhancement factor of surface electric field intensity is introduced to quantitatively describe the uniformity of the electric field concentration region.Moreover,the chaotic polynomial expansion method is applied to analyze the uncertainty of the center slot fillet radius of the contact electrode to ensure the reliability of insulation performance and manufacturing processes.
关键词
旁路开关/绝缘性能/混沌多项式展开法/不确定性分析Key words
Bypass switch/Insulation performance/Polynomial Chaos Expansion/Uncertainty analysis引用本文复制引用
出版年
2024
NETL
NSTL
万方数据