一种特高压换流变压器高压套管底部接线端子的检修方法  

Inspection and Repair Method for Connection Terminal at Bottom of High Voltage Bushing of UHV Converter Transformer

作　　者：刘博 Liu Bo

机构地区：[1]国网宁夏电力有限公司检修公司,宁夏银川750011

出　　处：《电力系统装备》2020年第17期102-103,共2页Electric Power System Equipment

摘　　要：特高压直流换流变压器是换流站的核心设备之一,其健康状况关系着整个特高压直流换流站的安全稳定运行。近期关于换流变压器高压套管底部接线端子的家族性缺陷频发。急需针对特高压换流变压器缺陷部位进行精准地局部检修。由于换流变体积高大,顶部结构复杂导致检修作业面局促,不满足摆放检修设备和工器具;且周围无任何防护措施,存在高坠隐患。针对以上问题,急需一种特高压换流变压器套管底部接线端子检修辅助装置及检修方法,用以大幅提升此类检修的工作效率,满足检修人员的安全需求和检修工艺的要求,避免高坠恶性事件的发生。通过该方法可极大地提高特高压换流变压器整体检修时间,对缩短特高压换流站停电检修时间,保证特高压直流外送电量有着极其重要的意义。The UHV DC converter transformer is one of the core equipment of the converter station,and its health is related to the safe and stable operation of the entire UHV DC converter station.Recently,there have been frequent familial defects in the bottom terminal of the converter transformer’s high-voltage bushing.There is an urgent need for precise local overhaul of the defective parts of UHV converter transformers.Due to the high volume of the converter transformer and the complicated top structure,the maintenance work is limited,and the maintenance equipment and tools are not satisfied;and there are no protective measures around,there is a hidden danger of high fall.In view of the above problems,there is an urgent need for a maintenance auxiliary device and a maintenance method for the wiring terminal at the bottom of the UHV converter transformer bushing to greatly improve the efficiency of such maintenance.Meet the safety requirements of maintenance personnel and the requirements of maintenance technology,and avoid the occurrence of high fall and malignant incidents.The use of this dedicated maintenance platform can greatly increase the overall maintenance time of UHV converter transformers,which is extremely important for shortening the power failure maintenance time of UHV converter stations and ensuring the power transmission of UHV DC.

关 键 词：特高压直流 换流变压器 套管升高座 辅助装置 

分 类 号：TM407[电气工程—电器]