Research for the Working Method of Live Replacing the L-type Insulator String on ±800kV DC Transmission Lines

4th International Conference on Mechanics and Mechatronics Research

机械制造;无线电电子学

Li, Jinliang^1,2 ; Wang, Zhigang^1,2 ; Lei, Dongyun^1,2 ; Yang, Miao^1,2 ; Xia, Zengming^1,2 ; Xiang, Yun^1,2 ; Yan, Yu^1,2 ; Liu, Zhiguo^1,2

State Grid Hunan Electric Power Company Live Working Center, Changsha

410100, China^1

Hunan Province Key Laboratory of Intelligent Live Working Technology and Equipment (Robot), Changsha

410100, China^2

关键词: DC transmission lines;    Field application;    Insulator string;    Mechanics analysis;    Safety precautions;    Security and stability;    UHV transmission line;    Ultra high voltage DC;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/224/1/012037/pdf
DOI  :  10.1088/1757-899X/224/1/012037

来源: IOP

【 摘 要 】

It would be hard to be repaired in the case of a power outage if the ±800kV ultra high voltage DC (UHVDC) transmission line was put into operation, so live working is the guarantee for its security and stability. Insulator strings of duplex L-type are widely used in UHVDC small angle towers. In the meantime, the tower structure and the insulator strings' arrangement type is different than the V-type. In order to ensure the security and stability of the transmission line, this paper presents a method of live replacing the duplex L-type insulators based on the actual parameter of the UHVDC L tower type and develops apparatus as a complementary supporting by mechanics analysis. In order to ensure the safety of working staff, the safe distance and combined gap of the hanging basket method are checked. Safety precautions are also proposed in the paper by the calculation of body surface field strength of the persons doing live working in the finite element method. It is shown by the field application that the live working task of replacing the L-type insulator strings can be accomplished successfully by the method put forward in this paper, which provides reference for the following live working on the UHV transmission line.