高压断路器系统建模与仿真研究

发布时间：2018-03-21 05:07

本文选题：高压断路器　切入点：系统仿真　出处：《南京理工大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着我国经济的高速发展,电力需求快速增长,同时电力系统的可靠性要求也越来越高。高压断路器作为保障电网正常运行的关键部件,对其研发设计具有重要的实际应用价值。高压断路器的开断性能主要由其电气性能与机械动力学性能决定。国内外高压断路器的研究通过理论分析、实验测试以及计算机仿真技术取得了巨大进展。然而目前大部分研究把高压断路器各部分分割开来独立分析,并没有从整体上对高压断路器这类多能域耦合系统进行研究。本文以此为研究背景,从系统建模的角度出发,利用虚拟样机技术建立高压断路器机械、气动、电子控制相结合的完整仿真模型。以六氟化硫瓷柱式高压断路器为研究对象,首先对其操动机构、传动机构以及灭弧室三个主要部分的结构组成和工作原理进行了介绍,在此基础上对高压断路器各部分间的相互作用及能量关系进行了分析,建立了高压断路器的整体工作原理图。根据高压断路器多能域耦合的特性及其研究设计流程,选择AMESim软件作为建模仿真平台。将操动机构开、合闸部分简化成由弹簧驱动的曲柄滑块机构,配以凸轮机构、脱扣/制动机构,添加控制系统以完成操动机构模型。将传动机构视为两个平行四杆机构的组合,利用多接口物块元件模拟连杆和拐臂,物块间采用铰链连接。将灭弧室简化为活塞结构,对其机械和气动两部分分别建模。最后将各部分在全局坐标中进行装配连接,形成高压断路器整体多能域耦合模型。针对高压断路器弹簧操动机构内的接触碰撞问题进行深入分析,分别对凸轮类非协调性曲面接触问题及铰链类协调性曲面接触问题,结合经典接触理论,探求AME-Sim模型中接触参数的合理定义方法。研究优化大质量弹簧在AMESim中的建模方法,以期能更准确地模拟弹簧动态性能对操动机构运动输出的影响。从频域与时域两个反映弹簧动态性能的角度,对连续弹簧进行理论分析,对离散弹簧模型进行仿真分析,通过两者对比研究AMESim中离散弹簧模型模拟真实弹簧的准确性。
[Abstract]:With the rapid development of China's economy, the demand for electricity is growing rapidly, and the reliability requirements of power system are becoming higher and higher. High voltage circuit breaker is the key component to ensure the normal operation of power network. It has important practical application value for its R & D design. The breaking performance of high voltage circuit breakers is mainly determined by their electrical and mechanical dynamic properties. The research of high voltage circuit breakers at home and abroad is analyzed theoretically. Great progress has been made in the experimental testing and computer simulation technology. However, most of the current research has separated the parts of the high voltage circuit breaker into independent analysis. In this paper, based on the background of the research, using the virtual prototype technology to establish the mechanical, pneumatic, and pneumatic of the high-voltage circuit breaker, this paper takes this as the research background, and from the point of view of system modeling, using virtual prototyping technology to establish the high-voltage circuit breaker mechanical, pneumatic, A complete simulation model combining electronic control. Taking the high voltage circuit breaker with porcelain hexafluoride column as the research object, the structure composition and working principle of three main parts of its operating mechanism, transmission mechanism and arc interrupter are introduced. On this basis, the interaction and energy relationship among the parts of high voltage circuit breaker are analyzed, and the overall working principle diagram of high voltage circuit breaker is established. According to the characteristics of multi energy domain coupling of high voltage circuit breaker and its research and design flow, AMESim software is chosen as modeling and simulation platform. The opening and closing part of the operating mechanism is simplified as a crank slider mechanism driven by a spring, with a cam mechanism, a release / brake mechanism, Control system is added to complete the operating mechanism model. The transmission mechanism is regarded as a combination of two parallel four-bar mechanisms. The connecting rod and the arm are simulated by using the multi-interface material block element, and the hinge connection is adopted between the blocks. The arc extinguishing chamber is simplified into a piston structure. The mechanical and pneumatic parts are modeled separately. Finally, the whole multi-energy domain coupling model of high voltage circuit breakers is formed by assembling the parts in the global coordinates. The contact collision problem in the spring operating mechanism of high voltage circuit breaker is analyzed in depth. The contact problem of cam non-conforming surface and hinge coordination surface is analyzed respectively, and the classical contact theory is combined. The reasonable definition method of contact parameters in AME-Sim model is discussed. The modeling method of optimizing mass spring in AMESim is studied in order to simulate the effect of spring dynamic performance on the kinematic output of actuator more accurately. The theoretical analysis of the continuous spring and the simulation of the discrete spring model are carried out. The accuracy of the simulation of the real spring in the discrete spring model in AMESim is studied by comparing the two models.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM561

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