输电线路引流板发热的原因分析和试验研究

Analysis and Experimental Study on the Causes of Heating of Drainage Plate of Transmission Line

超高压输电线路中耐张线夹的引流板出现不明原因发热甚至烧损现象,经停电检修处理后,仍然发生此类发热故障。通过收集超高压输电线路中耐张线夹引流板发热造成有缺陷的实物,据此进行发热原因分析,并进行模拟线路运行的电阻和温升试验,试验验证了电力复合脂导流性能差、螺栓松动后接触压力降低和接触面处理不当是造成引流板严重发热甚至烧损的主要原因。

This paper study a case that the drain plate of the tension clamp in the ultra-high voltage transmission line has heat or even burned for unknown reasons.This type of heat failure still occurs after the power failure is repaired.By collecting the defective objects caused by the heating of the tension clamp drain plate in the ultra-high voltage transmission line,the reason of heating was analyzed based on this,and the resistance and temperature rise tests that simulated the operation of the line were carried out.The test verified the poor conductivity of the power compound grease.The decrease in contact pressure and improper handling of the contact surface after the bolts are loose are the main reasons for the serious heating and even burning of the draft plate.