基于航空交流故障电弧标准的电弧仿真研究

Research on Model Simulation Based on Aviation AC Fault Arc Standard

随着飞机多电全电技术的迅猛发展,电力系统在飞机中的重要程度不断提升,而电弧故障是航空电力系统多发的一类电气故障,会引起飞机火灾,轻则烧毁线路,重则引起飞机坠毁。因此,航空交流故障电弧的研究对保障飞机电力系统的安全十分重要。针对传统航空交流故障电弧模型种类单一、难以准确模拟真实故障电弧的特点,基于航空交流故障电弧试验标准下点接触电极、点接触截断和松动接线柱试验中得到的故障电弧电压、电流特性进行分析后,提出模型改进方法,形成航空交流电弧仿真优化策略,从而涵盖所提航空交流电弧试验标准下的故障电弧特性。通过MATLAB/Simulink完成了电弧模型的搭建,对电弧数据及模型仿真结果进行特征量提取及比较,验证了航空交流故障电弧模型仿真策略和方法的有效性。

With the rapid development of aircraft multi-electric and all-electric technology,the importance of power system in aircraft has been increasing,and the arc fault is a kind of electrical fault frequently occurring in aviation power system,which will cause aircraft fire,or burn down the line,or cause aircraft crash.Therefore,the research of aviation AC fault arc is very important to ensure the safety of aircraft power system.In view of the characteristics that the traditional aviation AC fault arc model has a single type and is difficult to accurately simulate the real fault arc,based on the analysis of the fault arc voltage and current characteristics obtained in the experiments of point contact electrode,point contact cut-off and loose terminal under the aviation AC fault arc test standard,the model improvement method is proposed to form the aviation AC arc simulation optimization strategy.Thus,the fault arc characteristics under the proposed aviation AC arc test standard are covered.The arc model is built through MATLAB/Simulink,and the characteristic quantities of arc data and model simulation results are extracted and compared to verify the effectiveness of aviation AC fault arc model simulation strategy and method.