中国电机工程学报Issue(9)：2351-2359,9.DOI:10.13334/j.0258-8013.pcsee.2015.09.031
半波长输电线路潜供电弧多场耦合的动力学建模研究
Research on Multi-field Coupled Dynamic Modeling of Secondary Arcs With Half-wavelength Transmission Lines
摘要
Abstract
ABSTRACT:An arc chain model was adopted to integrate the electromagnetic force, the thermal buoyancy, the wind load force and the air resistance as to establish the stress equations as well as dynamic model of the secondary arcs with half-wavelength transmission lines. With extensive analysis of the arc formation and movement mechanisms, an arc root model was also given and a criterion for optimal length selection of the current element in simulation was proposed. The simulation results were compared with the experimental ones to verify the validity of the proposed models. The acting mechanism of the electromagnetic force, the thermal buoyancy and the wind load force on the secondary arcs was elucidated in terms of the arc trajectory and self-extinction time under different secondary current, wind speed and wind direction, which indicated that the proposed arc models can effectively count in the wind load effect on the arc motion and self-extinction characteristics. The secondary arc trajectory and self-extinction time regarding different initial arcing position were obtained based on simulation studies, which showed that initial arcing at the end of the electrodes presented long duration time and was difficult to be extinguished. The simulations also reproduced the jumping phenomenon of the upper root during arc moving to the end of the electrodes, which can reasonably justify the experimentally found case that the upper arc root position was relatively close to the arc column but behind the lower arc root.关键词
半波长输电/潜供电弧/多场耦合/弧根模型/起弧位置/物理实验Key words
half-wavelength transmission/secondary arc/multi-field coupling/arc root model/initial arcing position/physical experiment分类
信息技术与安全科学引用本文复制引用
行晋源,李庆民,丛浩熹,陈强,李劲松,李庆余..半波长输电线路潜供电弧多场耦合的动力学建模研究[J].中国电机工程学报,2015,(9):2351-2359,9.基金项目
国家自然科学基金项目(51277061，51420105011)；国家电网公司科技项目(GY71-14-032)。 Project Supported by National Natural Science Foundation of China (51277061,51420105011) （51277061，51420105011）
Science and Technology Project of SGCC(GY71-14-032) （GY71-14-032）
