高压断路器液压操动机构关键技术研究

发布时间：2018-02-09 03:58

本文关键词： 断路器操动机构延时机构优化设计自卫能力　出处：《辽宁工程技术大学》2015年硕士论文　论文类型：学位论文

【摘要】：断路器在电力系统中发挥着控制和保护的作用,是电力系统中必不可少的一部分。随着我国电网输电等级的不断提高,高压断路器金属短接时间普遍小于国家电网的技术规范,这一现状给电网稳定可靠的运行带来了安全隐患。国内市场迫切需要具有自卫能力的高压断路器,并要求不能依靠延缓保护装置的动作时间来实现。在这一背景下,本文旨在设计出体积小、结构紧凑、稳定可靠的延时机构,且该延时机构利用液压阀提供的液压传动来满足金属短接时间的控制与调节,实现对断路器自卫能力的要求。本课题的研究对象是实现断路器自卫能力的延时机构,依照液压操动机构的设计规范对该机构进行设计,并通过液压传动的理论知识分析所设计的结构的可行性；为提高试验成功率、节约成本,通过机械优化设计的复合形法和正交试验法对延时机构结构参数进行优化。利用Autodesk Inventor和AMESim软件建立优化设计方案的仿真模型,并采用Autodesk Simulation CFD和AMESim软件进行仿真分析,分析该结构内部流场、压力、速度的变化。与此同时还搭建了试验测试平台,通过试验验证其可行性。
[Abstract]:Circuit breakers play an important role in the control and protection of power system and are an indispensable part of power system. With the continuous improvement of transmission grade of power grid in China, the metal short connection time of high voltage circuit breaker is generally smaller than the technical specification of national power grid. This situation brings security risks to the stable and reliable operation of the power grid. The domestic market urgently needs high-voltage circuit breakers with self-defense capability and requires that it cannot be realized by delaying the operation time of the protective devices. The purpose of this paper is to design a stable and reliable delay mechanism with small size, compact structure, and the hydraulic transmission provided by the hydraulic valve is used to meet the control and adjustment of the metal short connection time. The research object of this subject is the delay mechanism to realize the self-defense ability of circuit breaker, which is designed according to the design specification of hydraulic operating mechanism. The feasibility of the designed structure is analyzed through the theoretical knowledge of hydraulic transmission, and in order to improve the success rate of the test and save the cost, The structural parameters of the delay mechanism are optimized by the complex method and orthogonal test method of mechanical optimization design. The simulation model of the optimal design scheme is established by using Autodesk Inventor and AMESim software, and the simulation analysis is carried out by Autodesk Simulation CFD and AMESim software. The variation of flow field, pressure and velocity in the structure is analyzed. At the same time, a test platform is built to verify its feasibility.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM561

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