项目名称： 故障电弧诱发电气线路火灾的电热耦合作用机制与发展规律研究

项目编号： No.51506059

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 能源与动力工程

项目作者： 涂然

作者单位： 华侨大学

项目金额： 21万元

中文摘要： 电气线路中故障电弧的持续电热耦合作用易诱发电缆包层材料起火，形成高能弧柱激励下的特殊线路燃烧和火蔓延行为，对设备或人员安全均构成重大威胁。本项目针对当前故障电弧电气线路火灾研究中的薄弱环节，首先从故障电弧电、热特征参量的相互作用机制入手，系统研究故障电弧热效应参量与回路电气特征参量的关联反馈机制，建立故障电弧非稳态耦合发展动力学模型。然后，进一步研究典型线缆包层材料在故障电弧热作用下的复杂传热传质过程，从理论上揭示故障电弧诱发电缆明火的动力学机制和转捩临界条件。基于所建立的故障电弧电热耦合发展动力学模型，研究电缆包层在故障电弧作用下的特殊火蔓延行为，建立故障电弧电气线路火灾的系统动力学模型。最后，挖掘提炼该过程中的相关探测参量新特征，发展能够有效应对多种复杂电气环境的故障电弧综合探测方法。本项目有助于丰富对故障电弧电气线路火灾致灾机制的科学认识，并为此类火灾的早期识别、预警提供科学支撑。

中文关键词： 电气火灾；故障电弧；电热耦合；动力学模型；复杂火蔓延

英文摘要： The electrical arcing conditions including safe or unintentional arcs occur regularly in many electrical circuits. Arc-fault is defined as an unintentional arcing condition in a circuit to distinguish from the arcs by normal operation. The continuous luminous discharge of the arc-fault and complex coupling effects between electrical and thermal parameters would raise the potential fire risk. This research work mainly focused on the combustion dynamics of the electrical fire induced by arc-fault, which would be experimentally and theoretically studied in detail. Firstly, the interaction mechanisms and developing characteristics of the arc-fault will be investigated to establish a systematic dynamical model for arc-fault circuit. Secondly, the process of heat and mass transfer of typical cable cover materials under the heating effect of arc-fault will be further studied with different electrical conditions. Then we will reveal the dynamical mechanisms and transition critical rules of flaming electrical fire induced by arc-fault. Based on the electro-thermal coupling dynamical model of arc-fault, a theoretical model on the special burning behavior of electrical circuit fire will be developed. Finally, a new early detection method of arc-fault for complex electrical conditions will be developed based on the above experimental and theoretical works. It would be helpful to enrich the scientific understandings on the mechanisms of arc-fault electrical fires from the works in this project. In addition, some important scientific support and application guidance could be provided for the early detection of arc-fault electrical fires.

英文关键词： Electrical fire;Arc-fault;Electro-thermal coupling;Dynamical model;Complex flame spread