真空断路器灭弧室电场计算与优化摘要.doc

真空断路器灭弧室电场计算与优化摘要高压断路器是电力系统中最重要的开关设备，其中真空断路器以其小型化和高可靠性等优点，已经在高中压领域得到愈来愈广泛的应用。真空灭弧室作为真空断路器的核心部件，灭弧室内电场分布的均匀性直接影响断路器的开关性能，因此本文在对灭弧室电场数值计算的基础上，进行了灭弧室结构优化，旨在得到一个分布均匀的电场。 本文通过对真空断路器灭弧室结构、原理的分析，建立了真空断路器灭弧室的数学模型，运用ANSYS 10.0有限元分析软件，对12kv真空断路器灭弧室进行几何模型的建立、网格划分、布尔计算、加载数据、求解及后处理后得到电场强度分布图。通过改变真空灭弧室初始参数得到影响电场强度分布的主要因素。研究表明：触头的半径、厚度、曲率及触头之间的开距，主屏蔽罩的长度以及动、静导电管的长度对真空断路器灭弧室的电场分布起主要影响作用。在真空断路器的优化中，以对电场强度分布起主要影响作用的因素为设计变量，以最大场强的最小值为目标，运用ANSYS优化软件对整体结构进行优化，并得到了最优结果。本文对真空灭弧室电场的研究工作可为真空断路器的优化设计、在线监测及故障诊断提供坚实的理论依据。【关键词】真空灭弧室 有限元 ANSYS10.0 电场 优化Abstract High-voltage circuit breaker is the most important power system switching equipment, vacuum circuit breaker with its small size and reliability advantages of high pressure has been more and more application fields. Vacuum arcing chamber as the core components of thevacuum circuit breaker, the uniformily of the electric field in the arcing chamber influence the switch function of circuit breaker directly, therefore this thesis to optimize the structure of the arcing chamber at the foundation of the computes of the arcing chamber, aim at getting a more uniformily electric field. This thesis through to analysis the structure and theory of the vacuum circuit breaker arcing chamber , established the mathematical model of the vacuum circuit breaker arcing chamber , using ANSYS finite element analysis software, to 12kv vacuum circuit breaker interrupter geometric model of field, mesh, Boolean calculating, loading data, solution and post-processing then get electric intensity distribution. By changing the vacuum arcing chamber initial parameters that influence the main factors of electric field intensity distribution. The results show that:the radius and thickness and curvature of the contactor and the distance between the contactor, the length of the main shields and the dynamic and static conductive tube plays a main effect to vacuum circuit breaker arcing chamber the distribution of electric field. The optimization in vacuum circuit breaker, for electric intensity distribution in the main influence factors on as design variables, aim for getting the minimum of the biggest value of the field ,using ANSYS optimization software optimize the whole structure,and got the superior result.In this paper, the electric field of vacuum interrup