磁收缩效应型液态金属限流器起弧特性研究

发布时间：2018-04-09 22:41

本文选题：液态金属限流器　切入点：起弧特性　出处：《中国电机工程学报》2017年04期

【摘要】：基于磁收缩效应的液态金属限流器具有体积小、结构简单、自检测故障和自恢复的优点,在未来中低压系统中具有良好的应用前景。采用高速摄影技术对液态金属收缩动态过程进行观测,并对其弧前时间进行测量,通过所建立的仿真模型对该物理过程进行分析研究。采用以上方法对不同因素下的液态金属起弧特性进行了全面研究,包括初始自由液面高度、隔板通孔孔壁粗糙程度及预期电流上升率等关键因素。研究结果表明:液态金属磁收缩过程往往同时包括源于液面凹陷的收缩及通孔液柱直接收缩两个过程。通过研究获得了两个过程的规律及影响,为未来限流器结构设计与性能优化提供依据。
[Abstract]:The liquid metal current limiter based on magnetic shrinkage has the advantages of small size, simple structure, self-detection fault and self-recovery, so it has a good application prospect in the future medium-low voltage system.The dynamic process of liquid metal shrinkage was observed by high speed photography, and the time before arc was measured. The physical process was analyzed by the established simulation model.The arcing characteristics of liquid metal under different factors are studied by using the above methods, including the initial free liquid level height, the roughness of the hole wall of the partition plate, and the expected current rise rate and so on.The results show that the magnetic shrinkage process of liquid metal usually consists of two processes: the shrinkage of liquid surface sag and the direct contraction of through hole liquid column.The law and influence of the two processes are obtained, which provides the basis for the future structure design and performance optimization of the current limiter.
【作者单位】：电力设备电气绝缘国家重点实验室(西安交通大学);陕西省地方电力设计研究院;国网陕西省电力公司电力科学研究院;
【基金】：国家973专题项目(2015CB251005) 自然科学基金资助项目(51521065,51577145,51377128) 电力设备电气绝缘国家重点实验室资助(EIPE16312) 国家电网公司科技项目(SGSNKYOOKJJS1501564) 国网湖北省电力公司科技项目(直流电网故障限流技术研究)(SGRIZLKJ(2016)325)~~
【分类号】：TM471

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