含电位悬浮导体组合间隙雷电冲击放电特性及击穿机理研究

项目名称： 含电位悬浮导体组合间隙雷电冲击放电特性及击穿机理研究

项目编号： No.51507119

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 电工技术

项目作者： 鲁海亮

作者单位： 武汉大学

项目金额： 21万元

中文摘要： 工程中含电位悬浮导体组合间隙的击穿过程影响因素复杂，不易总结规律、分析机理。本项目以含电位悬浮金属板的棒-板-棒典型间隙为代表对象，研究其雷电冲击击穿特性，内容包括：（1）基于含电位悬浮导体组合间隙雷电冲击放电过程的理论分析，确定影响间隙击穿特性的各条件参量的取值范围，构建试验及观测平台，设计试验研究方案；（2）通过单因素对比试验和正交试验对影响棒-板-棒组合间隙雷电冲击放电特性的因素进行遴选和量化，以主要因素及规律为基础，以击穿电压、击穿时间、击穿通道及预放电电流的观测结果为依据进行击穿机理分析；（3）基于流注理论，将间隙击穿过程分阶段进行模拟，结合电场计算及试验观测结果确定悬浮导体瞬时电位和流注通道参数，建立含电位悬浮导体组合间隙雷电冲击击穿过程仿真模型。拟通过项目研究揭示含电位悬浮导体组合间隙雷电冲击击穿机理，预期成果可为组合间隙的设计及应用提供理论指导和试验依据。

中文关键词： 电位悬浮导体；组合间隙；雷电冲击；放电特性；击穿机理

英文摘要： It is hard to analyze and summary the breakdown mechanism of combined gap containing potential-floating conductor due to the complicated influence factor. In this project, the lightning impulse of representative rod-plate-rod model which contains potential-floating conductor is studied. The detailed content is shown below.(1) Based on the theoretical analysis of lighting impulse procedure of combined gap containing potential-floating conductor, we can determine the value range of experimental parameters, build up experiment and observation platform, and design the experimental analysis method.（2）Based on the single factor and orthogonal experiments, we can choose and quantize the influence factor of lightning impulse of rod-plate-rod model which contains potential-floating conductor. Based on the major factor and discipline, the breakdown mechanism can be analyzed according to the observation on breakdown voltage, breakdown time, breakdown path, and pre-discharge current.（3）Based on the steamer theory, the simulation of the gap lightning impulse is separated into several steps. The transient potential and path parameters of potential-floating conductor are determined by electric field calculation and experimental results simultaneously. Also the simulation model of the combine gap lightning impulse discharge process which contains potential-floating conductor can be built accordingly. The project can reveal the mechanism of combined gap lightning impulse discharge process which contains potential-floating conductor. The expected results can provide both theoretical direction and experimental evidence for the design of combined gap.

英文关键词： potential-floating conductor;combined gap;lightning impulse;discharge characteristics;breakdown mechanism