铁路贯通线融冰特性试验研究

Experimental Research on Ice-melting Characteristics of Power Through Line for Railway

研究目的:铁路10 kV贯通线因采用架空线与电缆混接方式,且其导线截面远小于电力系统110 kV及以上输电线路,因此,必须对其融冰特性试验研究,为10 kV贯通线融冰方案的实施提供基础数据。研究结论:本文在实验室模拟的现场环境中,选取了LGJ-35、LGJ-50和LGJ-70三种规格的钢芯铝绞线和相同截面积的10 kV交联电缆,进行了贯通线融冰试验研究,分析了融冰电流对贯通线电缆的承受能力、融冰时间和脱冰方式的影响,得出了如下结论:10 kV贯通线的最佳融冰电流范围为:LGJ-35,175～195 A;LGJ-50,210 A～240 A;LGJ-70,265～305 A。最佳融冰时间为1～2 h。

Research purposes： As the 10 kV power through line for railway is an overhead line with hybrid junction of cable, its conductor section is much less than the 110 kV power system and above. So it is necessary to do the research on its ice - melting characteristics for providing the basic data for the ice - melting scheme of 10 kV power through line. Research conclusions： The research and test were done on the ice - melting characteristics of the power through line by using LGJ -35 ,LGJ -50 and LGJ -70 three different types of steel reinforced cable and 10kV cross -linked cables of the same section area with simulation of the field environment in lab. The influences of the ice - melting current on the bearing ability of the power through line, ice - melting time and the de - iceing method are analyzed. It is concluded the optimum ice - melting currents of the railway 10kV power through lines of LGJ - 35, LGJ - 50 and LGJ - 70 are separately 175 A - 195 A,210 A -240 A and 265A -305A and the optimum ice -melting time varies from lh to 2 h.