基于磁成像逆问题的开关电弧形态重构理论与关键技术研究

项目名称： 基于磁成像逆问题的开关电弧形态重构理论与关键技术研究

项目编号： No.51477129

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 电工技术

项目作者： 张国钢

作者单位： 西安交通大学

项目金额： 80万元

中文摘要： 开关电器是供用电系统中重要的控制和保护设备，高性能、小型化和智能化是其发展方向。开关电弧是开关电器中最复杂、最重要的物理现象。对开关电弧等离子体形态及其运动特性的实验测试在开关电器研究中具有不可替代的地位。本项目研究基于磁成像逆问题的开关电弧形态重构理论与关键技术，针对低压开关电器的功能和结构特点，结合电弧等离子体的物理特性，分析电弧电流密度分布与其周围空间磁场分布的相关性，建立开关电弧磁成像逆问题的数学模型，提出求解复杂栅片结构灭弧室中开关电弧磁成像逆问题的有效算法；基于磁光学原理构建实时测量开关电弧周围空间磁场分布的测试系统，实现开关电弧电流密度分布、空间形态以及弧根轨迹、运动速度等特性的测量；基于上述平台，针对典型灭弧室结构进行实验研究，总结空气介质开关电弧的形态和运动特性，为进一步探索和研究开关电弧的相关规律、指导新型低压开关电器的设计与开发提供新的手段和科学依据。

中文关键词： 开关电器；电弧等离子体；形态重构；磁成像；逆问题

英文摘要： The electrical apparatus is the most important control and protection equipment in the electrical distribution network,the high performance, miniaturization and intelligence of electrical apparatus are the main directions of development. The switching arc is the most complex and important phenomenon in an electrical apparatus. Experimental study on the spatial shape and kinetic characteristics of electrical arc plasma based on the modern test technology is a necessary means to the development of electrical apparatus and plays an irreplaceable role. This project focuses on the research of theory and key technology of electric arc plasma shape reconstruction based on the magnetic imaging inverse problem. Firstly, in this work, with the comprehensive consideration of the structural and functional characteristics of low voltage electrical apparatus and the physical properties of the switching arc plasma in air, the correlations between arc current density distribution and the magnetic field distribution near the arc chamber will be analyzed. The 2D even 3D mathematic models of switching arc magnetic imaging inverse problem will be established. Secondly, some efficient and stable algorithms used for solving the inverse problem will be proposed. Then, the experimental platform for the measurement of spatial and temporal magnetic field of the electric arc plasma in continuous surface will be set up based on the principles of magnetic optical. The corresponding data processing software will be developed so that the determination of the distribution of arc current density, the arc plasma spatial shape and kinetic characteristics of switching arc, such as the arc moving speed and the trail of arc root, can be accomplished. The last, Based on the test platform, the experimental study will be carried out on the typical arcing chambers. The spatial shape features and kinetic characteristics of switching arc in air will be summarized. This research will provide a new test method and also more scientific references for the further exploration on the relevant laws of switching arc and the design of low voltage electrical apparatus.

英文关键词： electrical apparatus;arc plasma;shape reconstruction;magnetic imaging;inverse problem