摘要
铁路接触网一旦覆冰将严重影响铁路运行,对复线区段将接触网的上、下行串联形成回路是一种新型的大电流热力融冰方案。由于接触网结构与架空电力线路存在较大差异,采用新型接触网融冰方案时与正常情况电气化铁路运行方式存在不同,因此有必要对该方案的主要电磁特性进行研究。基于电磁场理论,推导了融冰回路阻抗理论计算公式,验证了融冰方案的可行性;根据镜像法对该方案电场和磁场特性进行定量计算,得到不同区段电磁场的分布特性,与电气化铁路正常工况对比,表明不会引起额外的电磁场干扰。
Ice coating on overhead catenary in railway will severely affect railway transportation.For double-track section,it is a new type of strong electric-heating ice-melting method in which the up-down circuits of the catenary can be connected in series to form a loop.Because the catenary structure is different from power line,and because the operation ways under the new type of strong electric-heating ice-melting method is different from normal operation ways,it is necessary to research the main electromagnetic characteristics of this method.Based on electromagnetic field theory,the paper deduces out theoretical calculation formula of the ice-melting loop impedance,so the feasibility of this ice-melting method is verified.Further,base on Mirror Image Method,the paper calculates quantitatively the characteristics of the electric field and electromagnetic field of this method,then the distribution features in all sections are obtained.In comparison to the normal condition of electrified railway,it is concluded that this method would not cause additional electromagnetic field disturbance.
出处
《铁道标准设计》
北大核心
2012年第4期120-123,共4页
Railway Standard Design
基金
铁道部科技研究开发计划项目(2007J004)
关键词
电气化铁路
接触网
融冰
电磁场
elecrified railway
overhead catenary
ice melting
electromagnetic field
