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为满足±800 kV特高压直流输电线路带电作业发展的需要，根据海拔较高地区特高压线路杆塔结构尺寸、金具串型式等的特点，参考其他特高压线路带电作业思路，按照复合绝缘子组合安装形式对带电更换V型单串复合绝缘子的技术方法和工器具进行了研究设计。该技术方法及其工器具的研制成功，为全面提升海拔较高地区±800 kV线路带电作业水平打下了坚实的基础。“,”To catch up with the development of live working on the ± 800 kV UHV DC transmis?sion lines, in accordance with the composite insulator installation forms, with reference to the thoughts of other UHV lines in live working, the technical methods of V Single Composite Insula?tor String in the charged replacement of ±800 kV UHV DC transmission lines are explored and in?struments are designed according to the UHV line tower structure sizes and other hardware string types in higher elevations.The successful development of the technology methods and instruments have laid a solid foundation of the hot-line work on ± 800 kV lines in high area,and is a major breakthrough in the field of applied technology.